aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/ieee754/flt-32
AgeCommit message (Collapse)Author
2017-06-23Optimized version of powf()Paul Clarke
Most significant changes are code simplification and use of doubles for intermediate values. Also, some rearrangement to move early non-dependent code later, out of the faster paths. * sysdeps/ieee754/flt-32/e_powf.c: Optimized implementation utilizing rearranged code and doubles float types.
2017-03-15Improve float range reduction accuracy near pi/2 (bug 21094).Joseph Myers
Bug 21094 reports 3ulp errors of cosf and tanf for certain arguments near pi/2 arising from the use of an insufficiently accurate range reduction. (To be clear, this is a quality-of-implementation issue relating to the apparent intent of those particular cosf and tanf implementations; 3ulp is within the general glibc accuracy goals, so not inherently a bug.) This patch fixes that error by making a wider range of cases use the existing more accurate range reduction for arguments close to pi/2. The wider range of values is still narrow enough for the "z -= pio2_2;" in the more accurate case to be exact, as the code expects. Tested for x86_64, x86 and mips64; no ulps updates needed (but at least on mips64, the larger ulps were seen if the tests were added without the substantive fix). [BZ #21094] * sysdeps/ieee754/flt-32/e_rem_pio2f.c (__ieee754_rem_pio2f): Use 24+24+24-bit pi for wider range of values around pi/2. * math/auto-libm-test-in: Add more tests of cos and tan. * math/auto-libm-test-out-cos: Regenerated. * math/auto-libm-test-out-tan: Likewise.
2017-03-01Narrowing the visibility of libc-internal.h even further.Zack Weinberg
posix/wordexp-test.c used libc-internal.h for PTR_ALIGN_DOWN; similar to what was done with libc-diag.h, I have split the definitions of cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN to a new header, libc-pointer-arith.h. It then occurred to me that the remaining declarations in libc-internal.h are mostly to do with early initialization, and probably most of the files including it, even in the core code, don't need it anymore. Indeed, only 19 files actually need what remains of libc-internal.h. 23 others need libc-diag.h instead, and 12 need libc-pointer-arith.h instead. No file needs more than one of them, and 16 don't need any of them! So, with this patch, libc-internal.h stops including libc-diag.h as well as losing the pointer arithmetic macros, and all including files are adjusted. * include/libc-pointer-arith.h: New file. Define cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN here. * include/libc-internal.h: Definitions of above macros moved from here. Don't include libc-diag.h anymore either. * posix/wordexp-test.c: Include stdint.h and libc-pointer-arith.h. Don't include libc-internal.h. * debug/pcprofile.c, elf/dl-tunables.c, elf/soinit.c, io/openat.c * io/openat64.c, misc/ptrace.c, nptl/pthread_clock_gettime.c * nptl/pthread_clock_settime.c, nptl/pthread_cond_common.c * string/strcoll_l.c, sysdeps/nacl/brk.c * sysdeps/unix/clock_settime.c * sysdeps/unix/sysv/linux/i386/get_clockfreq.c * sysdeps/unix/sysv/linux/ia64/get_clockfreq.c * sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c * sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c: Don't include libc-internal.h. * elf/get-dynamic-info.h, iconv/loop.c * iconvdata/iso-2022-cn-ext.c, locale/weight.h, locale/weightwc.h * misc/reboot.c, nis/nis_table.c, nptl_db/thread_dbP.h * nscd/connections.c, resolv/res_send.c, soft-fp/fmadf4.c * soft-fp/fmasf4.c, soft-fp/fmatf4.c, stdio-common/vfscanf.c * sysdeps/ieee754/dbl-64/e_lgamma_r.c * sysdeps/ieee754/dbl-64/k_rem_pio2.c * sysdeps/ieee754/flt-32/e_lgammaf_r.c * sysdeps/ieee754/flt-32/k_rem_pio2f.c * sysdeps/ieee754/ldbl-128/k_tanl.c * sysdeps/ieee754/ldbl-128ibm/k_tanl.c * sysdeps/ieee754/ldbl-96/e_lgammal_r.c * sysdeps/ieee754/ldbl-96/k_tanl.c, sysdeps/nptl/futex-internal.h: Include libc-diag.h instead of libc-internal.h. * elf/dl-load.c, elf/dl-reloc.c, locale/programs/locarchive.c * nptl/nptl-init.c, string/strcspn.c, string/strspn.c * malloc/malloc.c, sysdeps/i386/nptl/tls.h * sysdeps/nacl/dl-map-segments.h, sysdeps/x86_64/atomic-machine.h * sysdeps/unix/sysv/linux/spawni.c * sysdeps/x86_64/nptl/tls.h: Include libc-pointer-arith.h instead of libc-internal.h. * elf/get-dynamic-info.h, sysdeps/nacl/dl-map-segments.h * sysdeps/x86_64/atomic-machine.h: Add multiple include guard.
2017-02-17Fix lgamma*, log10* and log2* results [BZ #21171]Tulio Magno Quites Machado Filho
lgamma(-x) should return +Inf and raise divide-by-zero. log10(+-0) and log2(+-0) should return -Inf and raise divide-by-zero. Tested on powerpc, powerpc64, powerpc64le and x86_64. [BZ #21171] * sysdeps/ieee754/dbl-64/e_lgamma_r.c (__ieee754_lgamma_r): Return +Inf and raise divide-by-zero when x is negative. * sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r): Likewise. * sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r): Likewise. * sysdeps/ieee754/dbl-64/e_log10.c (__ieee754_log10): Return -Inf and raise divide-by-zero when x = +-0. * sysdeps/ieee754/dbl-64/e_log2.c (__ieee754_log2): Likewise. * sysdeps/ieee754/flt-32/e_log10f.c (__ieee754_log10f): Likewise. * sysdeps/ieee754/flt-32/e_log2f.c (__ieee754_log2f): Likewise. * sysdeps/ieee754/ldbl-128/e_log10l.c (__ieee754_log10l): Likewise. * sysdeps/ieee754/ldbl-128/e_log2l.c (__ieee754_log2l): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_log10l.c (__ieee754_log10l): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_log2l.c (__ieee754_log2l): Likewise.
2017-02-15Fix y0 and y1 exception handling for zero input [BZ #21134]Gabriel F. T. Gomes
The Bessel functions of the second type (Yn) should raise the "divide by zero" exception when input is zero (both positive and negative). Current code gives the right output, but fails to set the exception. This error is exposed for float, double, and long double when linking with -lieee. Without this flag, the error is not exposed, because the wrappers for these functions, which use __kernel_standard functionality, set the exception as expected. Tested for powerpc64le. [BZ #21134] * sysdeps/ieee754/dbl-64/e_j0.c (__ieee754_y0): Raise the "divide by zero" exception when the input is zero. * sysdeps/ieee754/dbl-64/e_j1.c (__ieee754_y1): Likewise. * sysdeps/ieee754/flt-32/e_j0f.c (__ieee754_y0f): Likewise. * sysdeps/ieee754/flt-32/e_j1f.c (__ieee754_y1f): Likewise. * sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_y0l): Likewise. * sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_y1l): Likewise.
2017-02-08Move w_exp to libm-compat-call-autoGabriel F. T. Gomes
This patch adds the "_compat" suffix to the wrappers of the function exp, which use _LIB_VERSION / matherr / __kernel_standard functionality. Tested for powerpc64le, s390, and x86_64. * math/Makefile (libm-calls): Move w_exp... (libm-compat-calls-auto): Here. * math/w_expl.c: Add suffix "_compat" to filename. * sysdeps/ia64/fpu/w_expl.c: Likewise. * sysdeps/ia64/fpu/w_expf.c: Likewise. * sysdeps/ia64/fpu/w_exp.c: Likewise. * sysdeps/ieee754/dbl-64/w_exp.c: Likewise. * sysdeps/ieee754/flt-32/w_expf.c: Likewise. * sysdeps/ieee754/ldbl-128/w_expl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/w_expl.c: Likewise. * sysdeps/ieee754/ldbl-96/w_expl.c: Likewise. * math/w_expl_compat.c: New file, copied from above. * sysdeps/ia64/fpu/w_exp_compat.c: Likewise. * sysdeps/ia64/fpu/w_expf_compat.c: Likewise. * sysdeps/ia64/fpu/w_expl_compat.c: Likewise. * sysdeps/ieee754/dbl-64/w_exp_compat.c: Likewise. * sysdeps/ieee754/flt-32/w_expf_compat.c: Likewise. * sysdeps/ieee754/ldbl-128/w_expl_compat.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/w_expl_compat.c: Likewise. * sysdeps/ieee754/ldbl-96/w_expl_compat.c: Likewise. * sysdeps/ieee754/ldbl-64-128/w_expl.c: Add suffix "_compat" to filename. * sysdeps/ieee754/ldbl-opt/w_exp.c: Likewise. * sysdeps/ieee754/ldbl-64-128/w_expl_compat.c: New file, copied from above and adjusted for the new filenames. * sysdeps/ieee754/ldbl-opt/w_exp_compat.c: Likewise.
2017-02-07Fix powf inaccuracy (bug 21112).Joseph Myers
Bug 21112 reports a case where powf is substantially inaccurate. This results from a multiplication where cp_h*p_h is required to be exact, and p_h is masked to have only 12 leading nonzero bits in its mantissa, but the value of cp_h has the 13th bit nonzero, leading to inexact multiplication results in some cases that can result in large errors in the final result of powf. This patch fixes this by using a value of cp_h correctly rounded to nearest to 12 bits, with a corresponding updated value of cp_l. Tested for x86_64 and x86. [BZ #21112] * sysdeps/ieee754/flt-32/e_powf.c (cp_h): Use value with trailing 12 bits zero. (cp_l): Update for new value of cp_h. * math/auto-libm-test-in: Add another test of pow. * math/auto-libm-test-out-pow: Regenerated.
2017-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
2016-12-31Add fromfp functions.Joseph Myers
TS 18661-1 defines fromfp functions (fromfp, fromfpx, ufromfp, ufromfpx, and float and long double variants) to convert from floating-point to an integer type with any signedness and any given width up to that of intmax_t, in any of the five IEEE rounding modes (the usual four for binary floating point, plus rounding to nearest with ties rounding away from zero), with control of whether in-range non-integer values should result in the "inexact" exception being raised. This patch implements these functions for glibc. These implementations are (apart from raising exceptions) pure integer implementations; it's entirely possible optimized versions could be devised for some architectures. A common math/fromfp.h header provides various common helper code that can readily be shared between the implementations for different types. For each type, the bulk of the implementation is also shared between the four functions, with wrappers that define UNSIGNED and INEXACT macros appropriately before including the main implementation. As the functions return intmax_t and uintmax_t without math.h being allowed to expose those typedef names, they are declared using __intmax_t and __uintmax_t as obtained from <bits/types.h>. The FP_INT_* rounding direction macros are defined as ascending integers in the order the names are listed in the TS; I see no significant value in allowing architectures to vary the values of them. The libm-test machinery is duly adapted to handle unsigned int arguments, and intmax_t and uintmax_t results. Because each test input is generally tested for four functions, five rounding modes and several different widths, the libm-test.inc additions are very large. Thus, the diffs in the body of this message exclude the libm-test.inc changes, with the full patch being attached gzipped. The bulk of the new tests were generated (expanded from a test input plus rounding results and information about where it lies in the relevant interval between integers, to libm-test tests for all relevant combinations of function, rounding direction and width) by a script that's included in the patch as math/gen-fromfp-tests.py (input data math/gen-fromfp-tests-inputs); as an ad hoc script that's not really expected to be rerun, it's not very polished, but it's at least plausibly useful for adding any further tests for these functions in future. I may split the libm-test tests up by function in future (so both libm-test.inc and auto-libm-test-out are split into separate files, and the tests for each function are also built and run separately), but not for 2.25. For no obvious reason, adding tgmath tests for the new functions resulted in -Wuninitialized errors from test-tgmath.c about the variable i being used uninitialized. Those errors were correct - the variable is read by the frexp version in test-tgmath.c (where real frexp would write through that pointer instead of reading it) - but I don't know why this patch would result in the pre-existing issue being newly detected. The patch initializes the variable to avoid those errors. With these changes, glibc 2.25 should have all the library features from TS 18661-1 other than the functions that round result to narrower type (and constant rounding directions, but I'm considering those mainly a compiler feature not a library one). Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfp): New declaration. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfpx): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfp): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfpx): Likewise. * math/tgmath.h (__TGMATH_TERNARY_FIRST_REAL_RET_ONLY): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfp): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfp): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfpx): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfpx): Likewise. * math/math.h: Include <bits/types.h>. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_INT_UPWARD): New enum constant and macro. (FP_INT_DOWNWARD): Likewise. (FP_INT_TOWARDZERO): Likewise. (FP_INT_TONEARESTFROMZERO): Likewise. (FP_INT_TONEAREST): Likewise. * math/Versions (fromfp): New libm symbol at version GLIBC_2.25. (fromfpf): Likewise. (fromfpl): Likewise. (ufromfp): Likewise. (ufromfpf): Likewise. (ufromfpl): Likewise. (fromfpx): Likewise. (fromfpxf): Likewise. (fromfpxl): Likewise. (ufromfpx): Likewise. (ufromfpxf): Likewise. (ufromfpxl): Likewise. * math/Makefile (libm-calls): Add s_fromfpF, s_ufromfpF, s_fromfpxF and s_ufromfpxF. * math/gen-fromfp-tests.py: New file. * math/gen-fromfp-tests-inputs: Likewise. * math/libm-test.inc: Include <stdint.h> (check_intmax_t): New function. (check_uintmax_t): Likewise. (struct test_fiu_M_data): New type. (struct test_fiu_U_data): Likewise. (RUN_TEST_fiu_M): New macro. (RUN_TEST_LOOP_fiu_M): Likewise. (RUN_TEST_fiu_U): Likewise. (RUN_TEST_LOOP_fiu_U): Likewise. (fromfp_test_data): New array. (fromfp_test): New function. (fromfpx_test_data): New array. (fromfpx_test): New function. (ufromfp_test_data): New array. (ufromfp_test): New function. (ufromfpx_test_data): New array. (ufromfpx_test): New function. (main): Call fromfp_test, fromfpx_test, ufromfp_test and ufromfpx_test. * math/gen-libm-test.pl (parse_args): Handle u, M and U descriptor characters. * math/test-tgmath-ret.c: Include <stdint.h>. (rm): New variable. (width): Likewise. (CHECK_RET_CONST_TYPE): Take extra arguments and pass them to called function. (CHECK_RET_CONST_FLOAT): Take extra arguments and pass them to CHECK_RET_CONST_TYPE. (CHECK_RET_CONST_DOUBLE): Likewise. (CHECK_RET_CONST_LDOUBLE): Likewise. (CHECK_RET_CONST): Take extra arguments and pass them to calls macros. (fromfp): New CHECK_RET_CONST call. (ufromfp): Likewise. (fromfpx): Likewise. (ufromfpx): Likewise. (do_test): Call check_return_fromfp, check_return_ufromfp, check_return_fromfpx and check_return_ufromfpx. * math/test-tgmath.c: Include <stdint.h> (NCALLS): Increase to 138. (F(compile_test)): Initialize i. Call fromfp functions. (F(fromfp)): New function. (F(fromfpx)): Likewise. (F(ufromfp)): Likewise. (F(ufromfpx)): Likewise. * manual/arith.texi (Rounding Functions): Document FP_INT_UPWARD, FP_INT_DOWNWARD, FP_INT_TOWARDZERO, FP_INT_TONEARESTFROMZERO, FP_INT_TONEAREST, fromfp, fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf, fromfpxl, ufromfpx, ufromfpxf and ufromfpxl. * manual/libm-err-tab.pl (@all_functions): Add fromfp, fromfpx, ufromfp and ufromfpx. * math/fromfp.h: New file. * sysdeps/ieee754/dbl-64/s_fromfp.c: Likewise. * sysdeps/ieee754/dbl-64/s_fromfp_main.c: Likewise. * sysdeps/ieee754/dbl-64/s_fromfpx.c: Likewise. * sysdeps/ieee754/dbl-64/s_ufromfp.c: Likewise. * sysdeps/ieee754/dbl-64/s_ufromfpx.c: Likewise. * sysdeps/ieee754/flt-32/s_fromfpf.c: Likewise. * sysdeps/ieee754/flt-32/s_fromfpf_main.c: Likewise. * sysdeps/ieee754/flt-32/s_fromfpxf.c: Likewise. * sysdeps/ieee754/flt-32/s_ufromfpf.c: Likewise. * sysdeps/ieee754/flt-32/s_ufromfpxf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_fromfpl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_fromfpl_main.c: Likewise. * sysdeps/ieee754/ldbl-128/s_fromfpxl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_ufromfpl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_ufromfpxl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_fromfpl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_fromfpxl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_ufromfpl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_ufromfpxl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fromfpl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fromfpl_main.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fromfpxl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_ufromfpl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_ufromfpxl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fromfp, ufromfp, fromfpx and ufromfpx. (CFLAGS-nldbl-fromfp.c): New variable. (CFLAGS-nldbl-fromfpx.c): Likewise. (CFLAGS-nldbl-ufromfp.c): Likewise. (CFLAGS-nldbl-ufromfpx.c): Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-compat.h: Include <stdint.h>. * sysdeps/ieee754/ldbl-opt/nldbl-fromfp.c: New file. * sysdeps/ieee754/ldbl-opt/nldbl-fromfpx.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-ufromfp.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-ufromfpx.c: Likewise. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-21Add roundeven, roundevenf, roundevenl.Joseph Myers
TS 18661-1 defines roundeven functions that round a floating-point number to the nearest integer, in that floating-point type, with ties rounding to even (whereas the round functions round ties away from zero). As with other such functions, they raise no exceptions apart from "invalid" for signaling NaNs. There was a previous user request for this functionality in glibc in <https://sourceware.org/ml/libc-help/2015-02/msg00005.html>. This patch implements these functions for glibc. The implementations use integer bit-manipulation (or roundeven on the high and low parts, in the IBM long double case). It's possible that there may be faster approaches on some architectures (in particular, on AArch64 the frintn instruction should do exactly what's required); I'll leave it to architecture maintainers or others interested to implement such architecture-specific versions if desired. (Where architectures have instructions to round to nearest integer in the current rounding mode, implementations saving and restoring the rounding mode - and dealing with exceptions if those instructions generate "inexact" - are also possible, though their performance depends on the cost of manipulating exceptions / rounding mode state.) Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New declaration. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New macro. * math/Versions (roundeven): New libm symbol at version GLIBC_2.25. (roundevenf): Likewise. (roundevenl): Likewise. * math/Makefile (libm-calls): Add s_roundevenF. * math/libm-test.inc (roundeven_test_data): New array. (roundeven_test): New function. (main): Call roundeven_test. * math/test-tgmath.c (NCALLS): Increase to 134. (F(compile_test)): Call roundeven. (F(roundeven)): New function. * manual/arith.texi (Rounding Functions): Document roundeven, roundevenf and roundevenl. * manual/libm-err-tab.pl (@all_functions): Add roundeven. * include/math.h (roundeven): Use libm_hidden_proto. * sysdeps/ieee754/dbl-64/s_roundeven.c: New file. * sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c: Likewise. * sysdeps/ieee754/flt-32/s_roundevenf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add roundeven. (CFLAGS-nldbl-roundeven.c): New variable. * sysdeps/ieee754/ldbl-opt/nldbl-roundeven.c: New file. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-07Fix hypot sNaN handling (bug 20940).Joseph Myers
TS 18661-1 generally defines libm functions taking sNaN arguments to return qNaN and raise "invalid", even for the cases where a corresponding qNaN argument would not result in a qNaN return. This includes hypot with one argument being an infinity and the other being an sNaN. This patch duly fixes hypot implementatations in glibc (generic and powerpc) to ensure qNaN, computed by arithmetic on the arguments, is returned in that case. Various implementations do their checks for infinities and NaNs inline by manipulating the representations of the arguments. For simplicity, this patch just uses issignaling to check for sNaN arguments. This could be inlined like the existing code (with due care about reversed quiet NaN conventions, for implementations where that is relevant), but given that all these checks are in cases where it's already known at least one argument is not finite, which should be the uncommon case, that doesn't seem worthwhile unless performance issues are observed in practice. Tested for x86_64, x86, mips64 and powerpc. [BZ #20940] * sysdeps/ieee754/dbl-64/e_hypot.c (__ieee754_hypot): Do not return Inf for arguments Inf and sNaN. * sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Likewise. * sysdeps/ieee754/ldbl-128/e_hypotl.c (__ieee754_hypotl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_hypotl.c (__ieee754_hypotl): Likewise. * sysdeps/ieee754/ldbl-96/e_hypotl.c (__ieee754_hypotl): Likewise. * sysdeps/powerpc/fpu/e_hypot.c (TEST_INF_NAN): Do not return Inf for arguments Inf and sNaN. When returning a NaN, compute it by arithmetic on the arguments. * sysdeps/powerpc/fpu/e_hypotf.c (TEST_INF_NAN): Likewise. * math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
2016-12-02Fix sysdeps/ieee754 pow handling of sNaN arguments (bug 20916).Joseph Myers
Various pow function implementations mishandle sNaN arguments in various ways. This includes returning sNaN instead of qNaN for sNaN arguments. For arguments (1, sNaN) and (sNaN, 0), TS 18661-1 semantics are also that the result should be qNaN, whereas with a qNaN argument there the result should be 1, but for the dbl-64 implementation of pow there are issues with sNaN arguments beyond not implementing the TS 18661-1 semantics in those special cases. This patch makes the implementations in sysdeps/ieee754 follow the TS 18661-1 semantics consistently. Because x86 / x86_64 implementations still need fixing, testcases are not included with this patch; they will be included with the fix for the x86 / x86_64 versions. Tested for x86_64, x86, mips64 and powerpc (with such testcases, which pass in the mips64 and powerpc cases). [BZ #20916] * sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Do not return 1 for arguments (sNaN, 0) or (1, sNaN). Do arithmetic on NaN arguments to compute result. * sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Do not return 1 for arguments (sNaN, 0) or (1, sNaN). * sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Likewise.
2016-11-24Add setpayloadsig, setpayloadsigf, setpayloadsigl.Joseph Myers
TS 18661-1 defines functions for manipulating the payloads of NaNs. This patch implements the setpayloadsig functions for glibc; these are like the setpayload functions, but produce a signaling NaN instead of a quiet NaN. The substance of the implementation was included with the setpayload implementation, so the new files here just need to wrap the main files with different defines to build the new functions. Because the functions store a signaling NaN via a pointer and the libm-test macros choose a suitable initial value for the variable in such a case by comparing with the expected value, the relevant macro needs to clear exceptions after FE_INVALID may have been raised by that comparison. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (setpayloadsig): New declaration. * math/Versions (setpayloadsig): New libm symbol at version GLIBC_2.25. (setpayloadsigf): Likewise. (setpayloadsigl): Likewise. * math/Makefile (libm-calls): Add s_setpayloadsigF. * math/libm-test.inc (RUN_TEST_Ff_b1): Call feclearexcept (FE_ALL_EXCEPT) after initializing EXTRA_VAR. (setpayloadsig_test_data): New array. (setpayloadsig_test): New function. (main): Call setpayloadsig_test. * manual/arith.texi (FP Bit Twiddling): Document setpayloadsig, setpayloadsigf and setpayloadsigl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_setpayloadsig.c: New file. * sysdeps/ieee754/flt-32/s_setpayloadsigf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-setpayloadsig.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add setpayloadsig. (CFLAGS-nldbl-setpayloadsig.c): New variable. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-11-19Add setpayload, setpayloadf, setpayloadl.Joseph Myers
TS 18661-1 defines functions for manipulating the payloads of NaNs. This patch implements the setpayload functions for glibc; these set a number (pointed to by a function argument) to a quiet NaN with the given payload, or to +0 if the given payload is not valid. The implementations are structured to allow the substance of the implementation to be shared with the setpayloadsig functions when those are added. The semantics in the TS are not entirely clear in the case where the payload passed to the function is zero (see discussion on the WG14 reflector last month). This patch implements what seems the most sensible interpretation, that -0 is never valid to give as the payload, but +0 is valid in the case where the kind of NaN being generated has its high mantissa bit set so payload 0 is actually possible in such a NaN. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (setpayload): New declaration. * math/Versions (setpayload): New libm symbol at version GLIBC_2.25. (setpayloadf): Likewise. (setpayloadl): Likewise. * math/Makefile (libm-calls): Add s_setpayloadF. * math/libm-test.inc (struct test_Ffp_b1_data): Rename to struct test_Ff_b1_data. (RUN_TEST_Ff_b1): New macro. (RUN_TEST_LOOP_Ff_b1): Likewise. (canonicalize_test_data): Update type. (setpayload_test_data): New array. (setpayload_test): New function. (main): Call setpayload_test. * manual/arith.texi (FP Bit Twiddling): Document setpayload, setpayloadf and setpayloadl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_setpayload.c: New file. * sysdeps/ieee754/dbl-64/s_setpayload_main.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_setpayload_main.c: Likewise. * sysdeps/ieee754/flt-32/s_setpayloadf.c: Likewise. * sysdeps/ieee754/flt-32/s_setpayloadf_main.c: Likewise. * sysdeps/ieee754/ldbl-128/s_setpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c: Likewise. * sysdeps/ieee754/ldbl-96/s_setpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_setpayloadl_main.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-setpayload.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add setpayload. (CFLAGS-nldbl-setpayload.c): New variable. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-19Add getpayload, getpayloadf, getpayloadl.Joseph Myers
TS 18661-1 defines functions for manipulating the payloads of NaNs. This patch implements the getpayload functions for glibc; these extract the NaN payload (from an argument passed as a pointer, for which corresponding libm-test support is added) and return it in the same floating-point type. The return value of these functions is unspecified for non-NaN arguments; the patch does the simplest thing to implement, which is that the functions do not check whether the argument is a NaN and just treat the relevant bits of the representation as a payload regardless. A conversion from integer to floating-point is used to produce the required return value, except in the ldbl-128 case; as 128-bit integers are not supported for all configurations using ldbl-128, the code constructs the required floating-point representation of the return value directly instead. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (getpayload): New declaration. * math/Versions (getpayload): New libm symbol at version GLIBC_2.25. (getpayloadf): Likewise. (getpayloadl): Likewise. * math/Makefile (libm-calls): Add s_getpayloadF. * math/libm-test.inc: Include <nan-high-order-bit.h>. (struct test_f_f_data): Add comment. (RUN_TEST_fp_f): New macro. (RUN_TEST_LOOP_fp_f): Likewise. (getpayload_test_data): New array. (getpayload_test): New function. (main): Call getpayload_test. * math/gen-libm-test.pl (parse_args): Handle 'p' in argument descriptor. * manual/arith.texi (FP Bit Twiddling): Document getpayload, getpayloadf and getpayloadl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_getpayload.c: New file. * sysdeps/ieee754/dbl-64/wordsize-64/s_getpayload.c: Likewise. * sysdeps/ieee754/flt-32/s_getpayloadf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_getpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_getpayloadl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_getpayloadl.c: Likewise. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-17Define HIGH_ORDER_BIT_IS_SET_FOR_SNAN to 0 or 1.Joseph Myers
This patch moves the HIGH_ORDER_BIT_IS_SET_FOR_SNAN macro from being defined or undefined to the preferred convention of always being defined, to either 0 or 1, so allowing typo-proof tests with #if. The macro is moved from math_private.h to a new header nan-high-order-bit.h to make it easy for all architectures to define, either through the sysdeps/generic version of the header or through providing their own version of the header, without needing #ifndef in the generic math_private.h to give a default definition. The move also allows the macro to be used without needing math_private.h to be included; the immediate motivation of this patch is to allow tests to access this information (to know what kinds of NaNs 0 is a valid payload for) without needing to include math_private.h. Existing C level rather than preprocessor conditionals at all, but this patch does not make such a change). Tested for x86_64 and x86 (testsuite); also verified for x86_64, x86, mips64 and powerpc that installed stripped shared libraries are unchanged by the patch. * sysdeps/generic/nan-high-order-bit.h: New file. * sysdeps/hppa/nan-high-order-bit.h: Likewise. * sysdeps/mips/nan-high-order-bit.h: Likewise. * sysdeps/hppa/math_private.h: Remove file. * sysdeps/mips/math_private.h (HIGH_ORDER_BIT_IS_SET_FOR_SNAN): Do not define here. * sysdeps/ieee754/dbl-64/s_issignaling.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/s_totalorder.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/s_totalordermag.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/flt-32/s_issignalingf.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/flt-32/s_totalorderf.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/flt-32/s_totalordermagf.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128/s_issignalingl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128/s_totalorderl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128/s_totalordermagl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128ibm/s_issignalingl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-96/s_issignalingl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-96/s_totalorderl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-96/s_totalordermagl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
2016-10-15Add totalordermag, totalordermagf, totalordermagl.Joseph Myers
In addition to the totalorder functions, TS 18661-1 defines totalordermag functions, which do the same comparison but on the absolute values of the arguments. This patch implements these functions for glibc, including the type-generic macro in <tgmath.h>. In general the implementations are similar to but simpler than those for the totalorder functions. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (totalordermag): New declaration. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (totalordermag): New macro. * math/Versions (totalordermag): New libm symbol at version GLIBC_2.25. (totalordermagf): Likewise. (totalordermagl): Likewise. * math/Makefile (libm-calls): Add s_totalordermagF. * math/libm-test.inc (totalordermag_test_data): New array. (totalordermag_test): New function. (main): Call totalordermag_test. * math/test-tgmath.c (NCALLS): Increase to 125. (F(compile_test)): Call totalordermag. (F(totalordermag)): New function. * manual/arith.texi (FP Comparison Functions): Document totalordermag, totalordermagf and totalordermagl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_totalordermag.c: New file. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c: Likewise. * sysdeps/ieee754/flt-32/s_totalordermagf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_totalordermagl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_totalordermagl.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-totalordermag.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add totalordermag. (CFLAGS-nldbl-totalordermag.c): New variable. * sysdeps/ieee754/ldbl-128ibm/test-totalorderl-ldbl-128ibm.c (do_test): Also test totalordermagl. * sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c (do_test): Likewise. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-12Add totalorder, totalorderf, totalorderl.Joseph Myers
TS 18661-1 defines totalorder functions implementing the totalOrder comparison operation from IEEE 754-2008. This patch implements these functions for glibc, including the type-generic macro in <tgmath.h>. (The totalordermag functions will be added in a separate patch.) The description of the totalOrder operation is complicated. However, for IEEE interchange binary formats and the preferred quiet NaN convention, what that complicated description means is that you interpret the representation as a sign-magnitude integer (with -0 coming before +0) and do a <= comparison on that interpretation. For finite values and infinities the ordering of the sign-magnitude integers is just the same as the ordering of floating-point values, so this extends that to all representations. (Different representations of the same floating-point value - which includes same quantum in the decimal case - must still be considered equal by this operation, but that issue doesn't arise for IEEE interchange binary formats.) So the complications are: * When MIPS quiet NaN conventions are in use, the representation of NaNs needs adjusting before making such an integer comparison. This patch does this adjustment only when both arguments are NaNs, as there's no need for it if only one is a NaN, and as long as both are NaNs you can just flip the relevant bits without any problems from this turning a NaN into an infinity. * For the m68k version of ldbl-96, where the high mantissa bit is "don't care" for infinities and NaNs, representations where it differs must compare the same. Note: although the testcase for this compiles, I have not actually tested on m68k. * For ldbl-128ibm, the low part must be ignored when the high part is NaN, and low parts of +0 and -0 must be considered the same whatever the high part. The new tests in libm-test.inc are the first tests there specifying particular payloads for input NaNs. Separate tests are also added for the ldbl-96 and ldbl-128ibm special cases where there are different representations of the same value that must compare equal (which can't be covered in libm-test.inc as that only specifies values, not representations). Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (totalorder): New declaration. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (totalorder): New macro. * math/Versions (totalorder): New libm symbol at version GLIBC_2.25. (totalorderf): Likewise. (totalorderl): Likewise. * math/Makefile (libm-calls): Add s_totalorderF. * math/gen-libm-test.pl (parse_args): Escape quotes in test name string. * math/libm-test.inc (PAYLOAD_DIG): New macro. (qnan_value_pl): Likewise. (snan_value_pl): Likewise. (qnan_value): Define using qnan_value_pl. (snan_value): Define using snan_value_pl. (struct test_ff_i_data): Add comment about which tests use this structure. (RUN_TEST_ff_b): New macro. (RUN_TEST_LOOP_ff_b): Likewise. (totalorder_test_data): New array. (totalorder_test): New function. (main): Call totalorder_test. * math/test-tgmath.c (NCALLS): Increase to 122. (F(compile_test)): Call totalorder. (F(totalorder)): New function. * manual/arith.texi (FP Comparison Functions): Document totalorder, totalorderf and totalorderl. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/dbl-64/s_totalorder.c: New file. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c: Likewise. * sysdeps/ieee754/flt-32/s_totalorderf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_totalorderl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_totalorderl.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-totalorder.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add totalorder. (CFLAGS-nldbl-totalorder.c): New variable. * sysdeps/ieee754/ldbl-128ibm/test-totalorderl-ldbl-128ibm.c: New file. * sysdeps/ieee754/ldbl-128ibm/Makefile [$(subdir) = math] (tests): Add test-totalorderl-ldbl-128ibm. * sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c: New file. * sysdeps/ieee754/ldbl-96/Makefile [$(subdir) = math] (tests): Add test-totalorderl-ldbl-96. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-08-18Get rid of array-bounds warning in __kernel_rem_pio2[f] with gcc 6.1 -O3.Stefan Liebler
On s390x I get the following werror when build with gcc 6.1 (or current gcc head) and -O3: ../sysdeps/ieee754/dbl-64/k_rem_pio2.c: In function ‘__kernel_rem_pio2’: ../sysdeps/ieee754/dbl-64/k_rem_pio2.c:254:18: error: array subscript is below array bounds [-Werror=array-bounds] for (k = 1; iq[jk - k] == 0; k++) ~~^~~~~~~~ I get the same error with sysdeps/ieee754/flt-32/k_rem_pio2f.c. This patch adds DIAG_* macros around it. ChangeLog: * sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2): Use DIAG_*_NEEDS_COMMENT macro to get rid of array-bounds warning. * sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f): Likewise.
2016-08-03sparc64: add a VIS3 version of ceil, floor and truncAurelien Jarno
sparc64 passes floating point values in the floating point registers. As the the generic ceil, floor and trunc functions use integer instructions, it makes sense to provide a VIS3 version consisting in the the generic version compiled with -mvis3. GCC will then use movdtox, movxtod, movwtos and movstow instructions. sparc32 passes the floating point values in the integer registers, so it doesn't make sense to do the same. Changelog: * sysdeps/ieee754/dbl-64/s_trunc.c: Avoid alias renamed. * sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c: Likewise. * sysdeps/ieee754/flt-32/s_truncf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/Makefile [$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines): Add s_ceilf-vis3, s_ceil-vis3, s_floorf-vis3, s_floor-vis3, s_truncf-vis3, s_trunc-vis3. (CFLAGS-s_ceilf-vis3.c): New. Set to -Wa,-Av9d -mvis3. (CFLAGS-s_ceil-vis3.c): Likewise. (CFLAGS-s_floorf-vis3.c): Likewise. (CFLAGS-s_floor-vis3.c): Likewise. (CFLAGS-s_truncf-vis3.c): Likewise. (CFLAGS-s_trunc-vis3.c): Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis3.c: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise.
2016-06-16Add nextup and nextdown math functionsRajalakshmi Srinivasaraghavan
TS 18661 adds nextup and nextdown functions alongside nextafter to provide support for float128 equivalent to it. This patch adds nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf to libm before float128 support. The nextup functions return the next representable value in the direction of positive infinity and the nextdown functions return the next representable value in the direction of negative infinity. These are currently enabled as GNU extensions.
2016-06-13Fix frexp (NaN) (bug 20250).Joseph Myers
Various implementations of frexp functions return sNaN for sNaN input. This patch fixes them to add such arguments to themselves so that qNaN is returned. Tested for x86_64, x86, mips64 and powerpc. [BZ #20250] * sysdeps/i386/fpu/s_frexpl.S (__frexpl): Add non-finite input to itself. * sysdeps/ieee754/dbl-64/s_frexp.c (__frexp): Add non-finite or zero input to itself. * sysdeps/ieee754/dbl-64/wordsize-64/s_frexp.c (__frexp): Likewise. * sysdeps/ieee754/flt-32/s_frexpf.c (__frexpf): Likewise. * sysdeps/ieee754/ldbl-128/s_frexpl.c (__frexpl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_frexpl.c (__frexpl): Likewise. * sysdeps/ieee754/ldbl-96/s_frexpl.c (__frexpl): Likewise. * math/libm-test.inc (frexp_test_data): Add sNaN tests.
2016-05-24Do not raise "inexact" from generic round (bug 15479).Joseph Myers
C99 and C11 allow but do not require ceil, floor, round and trunc to raise the "inexact" exception for noninteger arguments. TS 18661-1 requires that this exception not be raised by these functions. This aligns them with general IEEE semantics, where "inexact" is only raised if the final step of rounding the infinite-precision result to the result type is inexact; for these functions, the infinite-precision integer result is always representable in the result type, so "inexact" should never be raised. The generic implementations of ceil, floor and round functions contain code to force "inexact" to be raised. This patch removes it for round functions to align them with TS 18661-1 in this regard. The tests *are* updated by this patch; there are fewer architecture-specific versions than for ceil and floor, and I fixed the powerpc ones some time ago. If any others still have the issue, as shown by tests for round failing with spurious exceptions, they can be fixed separately by architecture maintainers or others. Tested for x86_64, x86 and mips64. [BZ #15479] * sysdeps/ieee754/dbl-64/s_round.c (huge): Remove variable. (__round): Do not force "inexact" exception. * sysdeps/ieee754/dbl-64/wordsize-64/s_round.c (huge): Remove variable. (__round): Do not force "inexact" exception. * sysdeps/ieee754/flt-32/s_roundf.c (huge): Remove variable. (__roundf): Do not force "inexact" exception. * sysdeps/ieee754/ldbl-128/s_roundl.c (huge): Remove variable. (__roundl): Do not force "inexact" exception. * sysdeps/ieee754/ldbl-96/s_roundl.c (huge): Remove variable. (__roundl): Do not force "inexact" exception. * math/libm-test.inc (round_test_data): Do not allow spurious "inexact" exceptions.
2016-05-24Do not raise "inexact" from generic floor (bug 15479).Joseph Myers
C99 and C11 allow but do not require ceil, floor, round and trunc to raise the "inexact" exception for noninteger arguments. TS 18661-1 requires that this exception not be raised by these functions. This aligns them with general IEEE semantics, where "inexact" is only raised if the final step of rounding the infinite-precision result to the result type is inexact; for these functions, the infinite-precision integer result is always representable in the result type, so "inexact" should never be raised. The generic implementations of ceil, floor and round functions contain code to force "inexact" to be raised. This patch removes it for floor functions to align them with TS 18661-1 in this regard. Note that some architecture-specific versions may still raise "inexact", so the tests are not updated and the bug is not yet fixed. Tested for x86_64, x86 and mips64. [BZ #15479] * sysdeps/ieee754/dbl-64/s_floor.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__floor): Do not force "inexact" exception. * sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__floor): Do not force "inexact" exception. * sysdeps/ieee754/flt-32/s_floorf.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__floorf): Do not force "inexact" exception. * sysdeps/ieee754/ldbl-128/s_floorl.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__floorl): Do not force "inexact" exception.
2016-05-24Do not raise "inexact" from generic ceil (bug 15479).Joseph Myers
C99 and C11 allow but do not require ceil, floor, round and trunc to raise the "inexact" exception for noninteger arguments. TS 18661-1 requires that this exception not be raised by these functions. This aligns them with general IEEE semantics, where "inexact" is only raised if the final step of rounding the infinite-precision result to the result type is inexact; for these functions, the infinite-precision integer result is always representable in the result type, so "inexact" should never be raised. The generic implementations of ceil, floor and round functions contain code to force "inexact" to be raised. This patch removes it for ceil functions to align them with TS 18661-1 in this regard. Note that some architecture-specific versions may still raise "inexact", so the tests are not updated and the bug is not yet fixed. Tested for x86_64, x86 and mips64. [BZ #15479] * sysdeps/ieee754/dbl-64/s_ceil.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__ceil): Do not force "inexact" exception. * sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__ceil): Do not force "inexact" exception. * sysdeps/ieee754/flt-32/s_ceilf.c (huge): Remove variable. (__ceilf): Do not force "inexact" exception. * sysdeps/ieee754/ldbl-128/s_ceill.c: Do not mention "inexact" exception in comment. (huge): Remove variable. (__ceill): Do not force "inexact" exception.
2016-01-04Update copyright dates with scripts/update-copyrights.Joseph Myers
2015-12-11Fix indentation.Steve Ellcey
* sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f): Fix indentation.
2015-11-02Make nextafter, nexttoward set errno (bug 6799).Joseph Myers
nextafter and nexttoward fail to set errno on overflow and underflow. This patch makes them do so in cases that should include all the cases where such errno setting is required by glibc's goals for when to set errno (but not all cases of underflow where the result is nonzero and so glibc's goals do not require errno setting). Tested for x86_64, x86, mips64 and powerpc. [BZ #6799] * math/s_nextafter.c: Include <errno.h>. (__nextafter): Set errno on overflow and underflow. * math/s_nexttowardf.c: Include <errno.h>. (__nexttowardf): Set errno on overflow and underflow. * sysdeps/i386/fpu/s_nextafterl.c: Include <errno.h>. (__nextafterl): Set errno on overflow and underflow. * sysdeps/i386/fpu/s_nexttoward.c: Include <errno.h>. (__nexttoward): Set errno on overflow and underflow. * sysdeps/i386/fpu/s_nexttowardf.c: Include <errno.h>. (__nexttowardf): Set errno on overflow and underflow. * sysdeps/ieee754/flt-32/s_nextafterf.c: Include <errno.h>. (__nextafterf): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-128/s_nextafterl.c: Include <errno.h>. (__nextafterl): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-128/s_nexttoward.c: Include <errno.h>. (__nexttoward): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-128/s_nexttowardf.c: Include <errno.h>. (__nexttowardf): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c: Include <errno.h>. (__nextafterl): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c: Include <errno.h>. (__nexttoward): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c: Include <errno.h>. (__nexttowardf): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-96/s_nexttoward.c: Include <errno.h>. (__nexttoward): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-96/s_nexttowardf.c: Include <errno.h>. (__nexttowardf): Set errno on overflow and underflow. * sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c: Include <errno.h>. (__nldbl_nexttowardf): Set errno on overflow and underflow. * sysdeps/m68k/m680x0/fpu/s_nextafterl.c: Include <errno.h>. (__nextafterl): Set errno on overflow and underflow. * math/libm-test.inc (nextafter_test_data): Do not allow errno setting to be missing on overflow. Add more tests. (nexttoward_test_data): Likewise.
2015-10-27Remove GCC version conditionals on -Wmaybe-uninitialized pragmas.Joseph Myers
One common case of __GNUC_PREREQ (4, 7) conditionals is use of diagnostic control pragmas for -Wmaybe-uninitialized, an option introduced in GCC 4.7 where older GCC needed -Wuninitialized to be controlled instead if the warning appeared with older GCC. This patch removes such conditionals. (There remain several older uses of -Wno-uninitialized in makefiles that still need to be converted to diagnostic control pragmas if the issue is still present with current sources and supported GCC versions, and it's likely that in most cases those pragmas also will end up controlling -Wmaybe-uninitialized.) Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch, except for libresolv since res_send.c contains assertions whose line numbers are changed by the patch). * resolv/res_send.c (send_vc) [__GNUC_PREREQ (4, 7)]: Make code unconditional. * soft-fp/fmadf4.c [__GNUC_PREREQ (4, 7)]: Likewise. [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * soft-fp/fmasf4.c [__GNUC_PREREQ (4, 7)]: Make code unconditional. [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * soft-fp/fmatf4.c [__GNUC_PREREQ (4, 7)]: Make code unconditional. [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * stdlib/setenv.c [((__GNUC__ << 16) + __GNUC_MINOR__) >= ((4 << 16) + 7)]: Make code unconditional. [!(((__GNUC__ << 16) + __GNUC_MINOR__) >= ((4 << 16) + 7))]: Remove conditional code. * sysdeps/ieee754/dbl-64/e_lgamma_r.c (__ieee754_lgamma_r) [__GNUC_PREREQ (4, 7)]: Make code unconditional. (__ieee754_lgamma_r) [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r) [__GNUC_PREREQ (4, 7)]: Make code unconditional. (__ieee754_lgammaf_r) [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * sysdeps/ieee754/ldbl-128/k_tanl.c (__kernel_tanl) [__GNUC_PREREQ (4, 7)]: Make code unconditional. (__kernel_tanl) [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * sysdeps/ieee754/ldbl-128ibm/k_tanl.c (__kernel_tanl) [__GNUC_PREREQ (4, 7)]: Make code unconditional. (__kernel_tanl) [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * sysdeps/ieee754/ldbl-96/e_lgammal_r.c (__ieee754_lgammal_r) [__GNUC_PREREQ (4, 7)]: Make code unconditional. (__ieee754_lgammal_r) [!__GNUC_PREREQ (4, 7)]: Remove conditional code. * sysdeps/ieee754/ldbl-96/k_tanl.c (__kernel_tanl) [__GNUC_PREREQ (4, 7)]: Make code unconditional. (__kernel_tanl) [!__GNUC_PREREQ (4, 7)]: Remove conditional code.
2015-10-23Fix j1, jn missing errno setting on underflow (bug 18611).Joseph Myers
j1 and jn can underflow for small arguments, but fail to set errno when underflowing to 0. This patch fixes them to set errno in that case. Tested for x86_64, x86, mips64 and powerpc. [BZ #18611] * sysdeps/ieee754/dbl-64/e_j1.c (__ieee754_j1): Set errno and avoid excess range and precision on underflow. * sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Likewise. * sysdeps/ieee754/flt-32/e_j1f.c (__ieee754_j1f): Likewise. * sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise. * sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_j1l): Set errno on underflow. * sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-96/e_j1l.c (__ieee754_j1l): Likewise. * sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise. * math/auto-libm-test-in: Do not allow missing errno setting for tests of j1 and jn. * math/auto-libm-test-out: Regenerated.
2015-10-09Fix lrint, llrint, lround, llround missing exceptions for MIPS (bug 16399).Joseph Myers
For 32-bit MIPS and some other systems, various of the lrint, llrint, lround, llround functions can be missing exceptions on overflow because casts do not (in current GCC) result in the proper exceptions. In the MIPS case there are two problems here: MIPS I code generation uses an assembler macro that doesn't raise exceptions, while the libgcc conversions of floating-point values to long long also do not raise "invalid" on all overflow cases (and can raise spurious "inexact"). This patch adds support in the generic code (only the functions for which this problem has actually been seen) for forcing the "invalid" exception in the problem cases, and enables that support for the affected MIPS cases. Tested for MIPS; also tested for x86_64 and x86 that installed stripped shared libraries are unchanged by this patch. [BZ #16399] * sysdeps/generic/fix-fp-int-convert-overflow.h: New file. * sysdeps/ieee754/dbl-64/s_llrint.c: Include <fenv.h>, <limits.h> and <fix-fp-int-convert-overflow.h>. (__llrint) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/dbl-64/s_llround.c: Include <fenv.h>, <limits.h> and <fix-fp-int-convert-overflow.h>. (__llround) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/dbl-64/s_lrint.c: Include <fix-fp-int-convert-overflow.h>. (__lrint) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/dbl-64/s_lround.c: Include <fix-fp-int-convert-overflow.h>. (__lround) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/flt-32/s_llrintf.c: Include <fenv.h>, <limits.h> and <fix-fp-int-convert-overflow.h>. (__llrintf) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/flt-32/s_llroundf.c: Include <fenv.h>, <limits.h> and <fix-fp-int-convert-overflow.h>. (__llroundf) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/flt-32/s_lrintf.c: Include <fenv.h>, <limits.h> and <fix-fp-int-convert-overflow.h>. (__lrintf) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/ieee754/flt-32/s_lroundf.c: Include <fenv.h>, <limits.h> and <fix-fp-int-convert-overflow.h>. (__lroundf) [FE_INVALID]: Force FE_INVALID exception as needed if FIX_DBL_LLONG_CONVERT_OVERFLOW. * sysdeps/mips/mips32/fpu/fix-fp-int-convert-overflow.h: New file.
2015-10-05Work around powerpc32 integer 0 converting to -0 (bug 887, bug 19049, bug ↵Joseph Myers
19050). On powerpc32 hard-float, older processors (ones where fcfid is not available for 32-bit code), GCC generates conversions from integers to floating point that wrongly convert integer 0 to -0 instead of +0 in FE_DOWNWARD mode. This in turn results in logb and a few other functions wrongly returning -0 when they should return +0. This patch works around this issue in glibc as I proposed in <https://sourceware.org/ml/libc-alpha/2015-09/msg00728.html>, so that the affected functions can be correct and the affected tests pass in the absence of a GCC fix for this longstanding issue (GCC bug 67771 - if fixed, of course we can put in GCC version conditionals, and eventually phase out the workarounds). A new macro FIX_INT_FP_CONVERT_ZERO is added in a new sysdeps header fix-int-fp-convert-zero.h, and the powerpc32/fpu version of that header defines the macro based on the results of a configure test for whether such conversions use the fcfid instruction. Tested for x86_64 (that installed stripped shared libraries are unchanged by the patch) and powerpc (that HAVE_PPC_FCFID comes out to 0 as expected and that the relevant tests are fixed). Also tested a build with GCC configured for -mcpu=power4 and verified that HAVE_PPC_FCFID comes out to 1 in that case. There are still some other issues to fix to get test-float and test-double passing cleanly for older powerpc32 processors (apart from the need for an ulps regeneration for powerpc). (test-ldouble will be harder to get passing cleanly, but with a combination of selected fixes to ldbl-128ibm code that don't involve significant performance issues, allowing spurious underflow and inexact exceptions for that format, and lots of XFAILing for the default case of unpatched libgcc, it should be doable.) [BZ #887] [BZ #19049] [BZ #19050] * sysdeps/generic/fix-int-fp-convert-zero.h: New file. * sysdeps/ieee754/dbl-64/e_log10.c: Include <fix-int-fp-convert-zero.h>. (__ieee754_log10): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/dbl-64/e_log2.c: Include <fix-int-fp-convert-zero.h>. (__ieee754_log2): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/dbl-64/s_erf.c: Include <fix-int-fp-convert-zero.h>. (__erfc): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/dbl-64/s_logb.c: Include <fix-int-fp-convert-zero.h>. (__logb): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/flt-32/e_log10f.c: Include <fix-int-fp-convert-zero.h>. (__ieee754_log10f): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/flt-32/e_log2f.c: Include <fix-int-fp-convert-zero.h>. (__ieee754_log2f): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/flt-32/s_erff.c: Include <fix-int-fp-convert-zero.h>. (__erfcf): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/flt-32/s_logbf.c: Include <fix-int-fp-convert-zero.h>. (__logbf): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/ldbl-128ibm/s_erfl.c: Include <fix-int-fp-convert-zero.h>. (__erfcl): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/ieee754/ldbl-128ibm/s_logbl.c: Include <fix-int-fp-convert-zero.h>. (__logbl): Adjust signs as needed if FIX_INT_FP_CONVERT_ZERO. * sysdeps/powerpc/powerpc32/fpu/configure.ac: New file. * sysdeps/powerpc/powerpc32/fpu/configure: New generated file. * sysdeps/powerpc/powerpc32/fpu/fix-int-fp-convert-zero.h: New file. * config.h.in [_LIBC] (HAVE_PPC_FCFID): New macro.
2015-09-26Fix powf inaccuracy (bug 18956).Joseph Myers
The flt-32 version of powf can be inaccurate because of bugs in the extra-precision calculation of (x-1)/(x+1) or (x-1.5)/(x+1.5) as part of calculating log(x) with extra precision: a constant used (as part of adding 1 or 1.5 through integer arithmetic) is incorrect, and then the code fails to mask a computed high part before using it in arithmetic that relies on s_h*t_h being exactly representable. This patch fixes these bugs. Tested for x86_64 and x86. x86_64 ulps for powf removed and regenerated to reflect reduced ulps from the increased accuracy for existing tests. [BZ #18956] * sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Add 0x00400000 not 0x0040000 for high bit of mantissa. Mask with 0xfffff000 when extracting high part. * math/auto-libm-test-in: Add another test of pow. * math/auto-libm-test-out: Regenerated. * sysdeps/x86_64/fpu/libm-test-ulps: Update.
2015-09-25Fix pow missing underflows (bug 18825).Joseph Myers
Similar to various other bugs in this area, pow functions can fail to raise the underflow exception when the result is tiny and inexact but one or more low bits of the intermediate result that is scaled down (or, in the i386 case, converted from a wider evaluation format) are zero. This patch forces the exception in a similar way to previous fixes, thereby concluding the fixes for known bugs with missing underflow exceptions currently filed in Bugzilla. Tested for x86_64, x86, mips64 and powerpc. [BZ #18825] * sysdeps/i386/fpu/i386-math-asm.h (FLT_NARROW_EVAL_UFLOW_NONNAN): New macro. (DBL_NARROW_EVAL_UFLOW_NONNAN): Likewise. (LDBL_CHECK_FORCE_UFLOW_NONNAN): Likewise. * sysdeps/i386/fpu/e_pow.S: Use DEFINE_DBL_MIN. (__ieee754_pow): Use DBL_NARROW_EVAL_UFLOW_NONNAN instead of DBL_NARROW_EVAL, reloading the PIC register as needed. * sysdeps/i386/fpu/e_powf.S: Use DEFINE_FLT_MIN. (__ieee754_powf): Use FLT_NARROW_EVAL_UFLOW_NONNAN instead of FLT_NARROW_EVAL. Use separate return path for case when first argument is NaN. * sysdeps/i386/fpu/e_powl.S: Include <i386-math-asm.h>. Use DEFINE_LDBL_MIN. (__ieee754_powl): Use LDBL_CHECK_FORCE_UFLOW_NONNAN, reloading the PIC register. * sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Force underflow for subnormal result. * sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Use math_check_force_underflow_nonneg. * sysdeps/x86/fpu/powl_helper.c (__powl_helper): Use math_check_force_underflow. * sysdeps/x86_64/fpu/x86_64-math-asm.h (LDBL_CHECK_FORCE_UFLOW_NONNAN): New macro. * sysdeps/x86_64/fpu/e_powl.S: Include <x86_64-math-asm.h>. Use DEFINE_LDBL_MIN. (__ieee754_powl): Use LDBL_CHECK_FORCE_UFLOW_NONNAN. * math/auto-libm-test-in: Add more tests of pow. * math/auto-libm-test-out: Regenerated.
2015-09-23Don't use volatile in exp2f.Joseph Myers
sysdeps/ieee754/flt-32/e_exp2f.c declares two variable as "static const volatile float". Maybe this use of "volatile" was originally intended to inhibit optimization of underflowing / overflowing operations such as TWOM100 * TWOM100; in any case, it's not currently needed, as given -frounding-math constant folding of such expressions is properly disabled when it would be unsafe. This patch removes the unnecessary use of "volatile". Tested for x86_64. * sysdeps/ieee754/flt-32/e_exp2f.c (TWOM100): Remove volatile. (TWO127): Likewise.
2015-09-23Refactor code forcing underflow exceptions.Joseph Myers
Various floating-point functions have code to force underflow exceptions if a tiny result was computed in a way that might not have resulted in such exceptions even though the result is inexact. This typically uses math_force_eval to ensure that the underflowing expression is evaluated, but sometimes uses volatile. This patch refactors such code to use three new macros math_check_force_underflow, math_check_force_underflow_nonneg and math_check_force_underflow_complex (which in turn use math_force_eval). In the limited number of cases not suited to a simple conversion to these macros, existing uses of volatile are changed to use math_force_eval instead. The converted code does not always execute exactly the same sequence of operations as the original code, but the overall effects should be the same. Tested for x86_64, x86, mips64 and powerpc. * sysdeps/generic/math_private.h (fabs_tg): New macro. (min_of_type): Likewise. (math_check_force_underflow): Likewise. (math_check_force_underflow_nonneg): Likewise. (math_check_force_underflow_complex): Likewise. * math/e_exp2l.c (__ieee754_exp2l): Use math_check_force_underflow_nonneg. * math/k_casinh.c (__kernel_casinh): Likewise. * math/k_casinhf.c (__kernel_casinhf): Likewise. * math/k_casinhl.c (__kernel_casinhl): Likewise. * math/s_catan.c (__catan): Use math_check_force_underflow_complex. * math/s_catanf.c (__catanf): Likewise. * math/s_catanh.c (__catanh): Likewise. * math/s_catanhf.c (__catanhf): Likewise. * math/s_catanhl.c (__catanhl): Likewise. * math/s_catanl.c (__catanl): Likewise. * math/s_ccosh.c (__ccosh): Likewise. * math/s_ccoshf.c (__ccoshf): Likewise. * math/s_ccoshl.c (__ccoshl): Likewise. * math/s_cexp.c (__cexp): Likewise. * math/s_cexpf.c (__cexpf): Likewise. * math/s_cexpl.c (__cexpl): Likewise. * math/s_clog.c (__clog): Use math_check_force_underflow_nonneg. * math/s_clog10.c (__clog10): Likewise. * math/s_clog10f.c (__clog10f): Likewise. * math/s_clog10l.c (__clog10l): Likewise. * math/s_clogf.c (__clogf): Likewise. * math/s_clogl.c (__clogl): Likewise. * math/s_csin.c (__csin): Use math_check_force_underflow_complex. * math/s_csinf.c (__csinf): Likewise. * math/s_csinh.c (__csinh): Likewise. * math/s_csinhf.c (__csinhf): Likewise. * math/s_csinhl.c (__csinhl): Likewise. * math/s_csinl.c (__csinl): Likewise. * math/s_csqrt.c (__csqrt): Use math_check_force_underflow. * math/s_csqrtf.c (__csqrtf): Likewise. * math/s_csqrtl.c (__csqrtl): Likewise. * math/s_ctan.c (__ctan): Use math_check_force_underflow_complex. * math/s_ctanf.c (__ctanf): Likewise. * math/s_ctanh.c (__ctanh): Likewise. * math/s_ctanhf.c (__ctanhf): Likewise. * math/s_ctanhl.c (__ctanhl): Likewise. * math/s_ctanl.c (__ctanl): Likewise. * stdlib/strtod_l.c (round_and_return): Use math_force_eval instead of volatile. * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_asin): Use math_check_force_underflow. * sysdeps/ieee754/dbl-64/e_atanh.c (__ieee754_atanh): Likewise. * sysdeps/ieee754/dbl-64/e_exp.c (__ieee754_exp): Do not use volatile when forcing underflow. * sysdeps/ieee754/dbl-64/e_exp2.c (__ieee754_exp2): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Likewise. * sysdeps/ieee754/dbl-64/e_j1.c (__ieee754_j1): Use math_check_force_underflow. * sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Likewise. * sysdeps/ieee754/dbl-64/e_sinh.c (__ieee754_sinh): Likewise. * sysdeps/ieee754/dbl-64/s_asinh.c (__asinh): Likewise. * sysdeps/ieee754/dbl-64/s_atan.c (atan): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/dbl-64/s_erf.c (__erf): Use math_check_force_underflow. * sysdeps/ieee754/dbl-64/s_expm1.c (__expm1): Likewise. * sysdeps/ieee754/dbl-64/s_fma.c (__fma): Use math_force_eval instead of volatile. * sysdeps/ieee754/dbl-64/s_log1p.c (__log1p): Use math_check_force_underflow. * sysdeps/ieee754/dbl-64/s_sin.c (__sin): Likewise. * sysdeps/ieee754/dbl-64/s_tan.c (tan): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/dbl-64/s_tanh.c (__tanh): Use math_check_force_underflow. * sysdeps/ieee754/flt-32/e_asinf.c (__ieee754_asinf): Likewise. * sysdeps/ieee754/flt-32/e_atanhf.c (__ieee754_atanhf): Likewise. * sysdeps/ieee754/flt-32/e_exp2f.c (__ieee754_exp2f): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r): Likewise. * sysdeps/ieee754/flt-32/e_j1f.c (__ieee754_j1f): Use math_check_force_underflow. * sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise. * sysdeps/ieee754/flt-32/e_sinhf.c (__ieee754_sinhf): Likewise. * sysdeps/ieee754/flt-32/k_sinf.c (__kernel_sinf): Likewise. * sysdeps/ieee754/flt-32/k_tanf.c (__kernel_tanf): Likewise. * sysdeps/ieee754/flt-32/s_asinhf.c (__asinhf): Likewise. * sysdeps/ieee754/flt-32/s_atanf.c (__atanf): Likewise. * sysdeps/ieee754/flt-32/s_erff.c (__erff): Likewise. * sysdeps/ieee754/flt-32/s_expm1f.c (__expm1f): Likewise. * sysdeps/ieee754/flt-32/s_log1pf.c (__log1pf): Likewise. * sysdeps/ieee754/flt-32/s_tanhf.c (__tanhf): Likewise. * sysdeps/ieee754/ldbl-128/e_asinl.c (__ieee754_asinl): Likewise. * sysdeps/ieee754/ldbl-128/e_atanhl.c (__ieee754_atanhl): Likewise. * sysdeps/ieee754/ldbl-128/e_expl.c (__ieee754_expl): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_j1l): Use math_check_force_underflow. * sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-128/e_sinhl.c (__ieee754_sinhl): Likewise. * sysdeps/ieee754/ldbl-128/k_sincosl.c (__kernel_sincosl): Likewise. * sysdeps/ieee754/ldbl-128/k_sinl.c (__kernel_sinl): Likewise. * sysdeps/ieee754/ldbl-128/k_tanl.c (__kernel_tanl): Likewise. * sysdeps/ieee754/ldbl-128/s_asinhl.c (__asinhl): Likewise. * sysdeps/ieee754/ldbl-128/s_atanl.c (__atanl): Likewise. * sysdeps/ieee754/ldbl-128/s_erfl.c (__erfl): Likewise. * sysdeps/ieee754/ldbl-128/s_expm1l.c (__expm1l): Likewise. * sysdeps/ieee754/ldbl-128/s_fmal.c (__fmal): Use math_force_eval instead of volatile. * sysdeps/ieee754/ldbl-128/s_log1pl.c (__log1pl): Use math_check_force_underflow. * sysdeps/ieee754/ldbl-128/s_tanhl.c (__tanhl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_asinl.c (__ieee754_asinl): Use math_check_force_underflow. * sysdeps/ieee754/ldbl-128ibm/e_atanhl.c (__ieee754_atanhl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Use math_check_force_underflow. * sysdeps/ieee754/ldbl-128ibm/e_sinhl.c (__ieee754_sinhl): Likewise. * sysdeps/ieee754/ldbl-128ibm/k_sincosl.c (__kernel_sincosl): Likewise. * sysdeps/ieee754/ldbl-128ibm/k_sinl.c (__kernel_sinl): Likewise. * sysdeps/ieee754/ldbl-128ibm/k_tanl.c (__kernel_tanl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_asinhl.c (__asinhl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_atanl.c (__atanl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_erfl.c (__erfl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_tanhl.c (__tanhl): Likewise. * sysdeps/ieee754/ldbl-96/e_asinl.c (__ieee754_asinl): Likewise. * sysdeps/ieee754/ldbl-96/e_atanhl.c (__ieee754_atanhl): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/ldbl-96/e_j1l.c (__ieee754_j1l): Use math_check_force_underflow. * sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-96/e_sinhl.c (__ieee754_sinhl): Likewise. * sysdeps/ieee754/ldbl-96/k_sinl.c (__kernel_sinl): Likewise. * sysdeps/ieee754/ldbl-96/k_tanl.c (__kernel_tanl): Use math_check_force_underflow_nonneg. * sysdeps/ieee754/ldbl-96/s_asinhl.c (__asinhl): Use math_check_force_underflow. * sysdeps/ieee754/ldbl-96/s_erfl.c (__erfl): Likewise. * sysdeps/ieee754/ldbl-96/s_fmal.c (__fmal): Use math_force_eval instead of volatile. * sysdeps/ieee754/ldbl-96/s_tanhl.c (__tanhl): Use math_check_force_underflow.
2015-09-23Use math_narrow_eval more consistently.Joseph Myers
Where glibc code needs to avoid excess range and precision in floating-point arithmetic, code variously uses either asms or volatile to force the results of that arithmetic to memory; mostly this is conditional on FLT_EVAL_METHOD, but in the case of lrint / llrint functions some use of volatile is unconditional (and is present unnecessarily in versions for long double). This patch make such code use the recently-added math_narrow_eval macro consistently, removing the unnecessary uses of volatile in long double lrint / llrint implementations completely. Tested for x86_64, x86, mips64 and powerpc. * math/s_nexttowardf.c (__nexttowardf): Use math_narrow_eval. * stdlib/strtod_l.c: Include <math_private.h>. (overflow_value): Use math_narrow_eval. (underflow_value): Likewise. * sysdeps/i386/fpu/s_nexttoward.c (__nexttoward): Likewise. * sysdeps/i386/fpu/s_nexttowardf.c (__nexttowardf): Likewise. * sysdeps/ieee754/dbl-64/e_gamma_r.c (gamma_positive): Likewise. (__ieee754_gamma_r): Likewise. * sysdeps/ieee754/dbl-64/gamma_productf.c (__gamma_productf): Likewise. * sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2): Likewise. * sysdeps/ieee754/dbl-64/lgamma_neg.c (__lgamma_neg): Likewise. * sysdeps/ieee754/dbl-64/s_erf.c (__erfc): Likewise. * sysdeps/ieee754/dbl-64/s_llrint.c (__llrint): Likewise. * sysdeps/ieee754/dbl-64/s_lrint.c (__lrint): Likewise. * sysdeps/ieee754/flt-32/e_gammaf_r.c (gammaf_positive): Likewise. (__ieee754_gammaf_r): Likewise. * sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f): Likewise. * sysdeps/ieee754/flt-32/lgamma_negf.c (__lgamma_negf): Likewise. * sysdeps/ieee754/flt-32/s_erff.c (__erfcf): Likewise. * sysdeps/ieee754/flt-32/s_llrintf.c (__llrintf): Likewise. * sysdeps/ieee754/flt-32/s_lrintf.c (__lrintf): Likewise. * sysdeps/ieee754/ldbl-128/s_llrintl.c (__llrintl): Do not use volatile. * sysdeps/ieee754/ldbl-128/s_lrintl.c (__lrintl): Likewise. * sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward): Use math_narrow_eval. * sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c (__nexttoward): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c (__nexttowardf): Likewise. * sysdeps/ieee754/ldbl-96/gamma_product.c (__gamma_product): Likewise. * sysdeps/ieee754/ldbl-96/s_llrintl.c (__llrintl): Do not use volatile. * sysdeps/ieee754/ldbl-96/s_lrintl.c (__lrintl): Likewise. * sysdeps/ieee754/ldbl-96/s_nexttoward.c (__nexttoward): Use math_narrow_eval. * sysdeps/ieee754/ldbl-96/s_nexttowardf.c (__nexttowardf): Likewise. * sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c (__nldbl_nexttowardf): Likewise.
2015-09-18Avoid excess range overflowing results from cosh, sinh, lgamma (bug 18980).Joseph Myers
Various i386 libm functions return values with excess range and precision; Wilco Dijkstra's patches to make isfinite etc. expand inline cause this pre-existing issue to result in test failures (when e.g. a result that overflows float but not long double gets counted as overflowing for some purposes but not others). This patch addresses those cases arising from functions defined in C, adding a math_narrow_eval macro that forces values to memory to eliminate excess precision if FLT_EVAL_METHOD indicates this is needed, and is a no-op otherwise. I'll convert existing uses of volatile and asm for this purpose to use the new macro later, once i386 has clean test results again (which requires fixes for .S files as well). Tested for x86_64 and x86. Committed. [BZ #18980] * sysdeps/generic/math_private.h: Include <float.h>. (math_narrow_eval): New macro. [FLT_EVAL_METHOD != 0] (excess_precision): Likewise. * sysdeps/ieee754/dbl-64/e_cosh.c (__ieee754_cosh): Use math_narrow_eval on overflowing return value. * sysdeps/ieee754/dbl-64/e_lgamma_r.c (__ieee754_lgamma_r): Likewise. * sysdeps/ieee754/dbl-64/e_sinh.c (__ieee754_sinh): Likewise. * sysdeps/ieee754/flt-32/e_coshf.c (__ieee754_coshf): Likewise. * sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r): Likewise. * sysdeps/ieee754/flt-32/e_sinhf.c (__ieee754_sinhf): Likewise.
2015-09-18Since we now inline isinf, isnan and isfinite in math.h, replace uses of ↵Wilco Dijkstra
__isinf_ns(l/f) with isinf, and remove the unused inlines __isinf_ns(l/f), __isnan(f) and __finite(f). 2015-09-18 Wilco Dijkstra <wdijkstr@arm.com> * include/math.h: Remove __isinf_ns, __isinf_nsf, __isinf_nsl. * math/Makefile: Remove isinf_ns.c. * math/divtc3.c (__divtc3): Replace __isinf_nsl with isinf. * math/multc3.c (__multc3): Likewise. * math/s_casin.c (__casin): Likewise. * math/s_casinf.c (__casinf): Likewise. * math/s_casinl.c (__casinl): Likewise. * math/s_cproj.c (__cproj): Likewise. * math/s_cprojf.c (__cprojf): Likewise. * math/s_cprojl.c (__cprofl): Likewise. * math/s_ctan.c (__ctan): Likewise. * math/s_ctanf.c (__ctanf): Likewise. * math/s_ctanh.c (__ctanh): Likewise. * math/s_ctanhf.c (__ctanhf): Likewise. * math/s_ctanhl.c (__ctanhl): Likewise. * math/s_ctanl.c (__ctanl): Likewise. * math/w_fmod.c (__fmod): Likewise. * math/w_fmodf.c (__fmodf): Likewise. * math/w_fmodl.c (_fmodl): Likewise. * math/w_remainder.c (__remainder): Likewise. * math/w_remainderf.c (__remainderf): Likewise. * math/w_remainderl.c (__remainderl): Likewise. * math/w_scalb.c (__scalb): Likewise. * math/w_scalbf.c (__scalbf): Likewise. * math/w_scalbl.c (__scalbl): Likewise. * sysdeps/ieee754/dbl-64/s_isinf_ns.c: Deleted file. * sysdeps/ieee754/dbl-64/s_sincos.c (__sincos): Replace __isinf_ns with isinf. * sysdeps/ieee754/dbl-64/wordsize-64/math_private.h: Deleted file. * sysdeps/ieee754/dbl-64/wordsize-64/s_isinf_ns.c: Deleted file. * sysdeps/ieee754/flt-32/e_exp2f.c (__ieee754_exp2f): Replace __isinf_nsf with isinf. * sysdeps/ieee754/flt-32/math_private.h: Deleted file. * sysdeps/ieee754/flt-32/s_isinf_nsf.c: Deleted file. * sysdeps/ieee754/ldbl-128/s_isinf_nsl.c: Deleted file. * sysdeps/ieee754/ldbl-128/s_sincosl.c (__sincosl): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-128ibm/s_cprojl.c(__cprojll): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-128ibm/s_ctanl.c(__ctanl): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-128ibm/s_isinf_nsl.c: Deleted file. * sysdeps/ieee754/ldbl-128ibm/s_sincosl.c (__sincosl): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-96/s_isinf_nsl.c: Deleted file. * sysdeps/ieee754/ldbl-96/s_sincosl.c (__sincosl): Replace __isinf_nsl with isinf.
2015-09-18Fix several build failures with GCC6 due to unused static variables.Wilco Dijkstra
2015-09-18 Wilco Dijkstra <wdijkstr@arm.com> * resolv/base64.c (rcsid): Remove unused static. * sysdeps/ieee754/dbl-64/atnat2.h (qpi1): Remove unused static. (tqpi1): Likewise. * sysdeps/ieee754/dbl-64/uexp.h (one): Likewise. * sysdeps/ieee754/dbl-64/upow.h (sqrt_2): Likewise. * sysdeps/ieee754/flt-32/e_log10f.c (one): Likewise. * sysdeps/ieee754/flt-32/s_cosf.c (one): Likewise. * sysdeps/ieee754/ldbl-128/e_lgammal_r.c (zero): Likewise. * sysdeps/ieee754/ldbl-128/s_erfl.c (half): Likewise. * sysdeps/ieee754/ldbl-128/s_log1pl.c (maxlog): Likewise. * timezone/private.h (time_t_min): Likewise. (time_t_max): Likewise.
2015-09-18Use the GCC builtin functions for the non-inlined signbit implementations.Wilco Dijkstra
2015-09-18 Wilco Dijkstra <wdijkstr@arm.com> * sysdeps/ieee754/dbl-64/s_signbit.c (__signbit): Use __builtin_signbit. * sysdeps/ieee754/flt-32/s_signbitf.c (__signbitf): Use __builtin_signbitf. * sysdeps/ieee754/ldbl-128/s_signbitl.c (__signbitl): Use __builtin_signbitl. * sysdeps/ieee754/ldbl-128ibm/s_signbitl.c (___signbitl): Likewise. * sysdeps/ieee754/ldbl-96/s_signbitl.c (__signbitl): Likewise.
2015-09-17Reduce number of constants in __finite* (bug 15384).Joseph Myers
Bug 15384 notes that in __finite, two different constants are used that could be the same constant (the result only depends on the exponent of the floating-point representation), and that using the same constant is better for architectures where constants need loading from a constant pool. This patch implements that change. Tested for x86_64, mips64 and powerpc. [BZ #15384] * sysdeps/ieee754/dbl-64/s_finite.c (FINITE): Use same constant as bit-mask as in subtraction. * sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c (__finite): Likewise. * sysdeps/ieee754/flt-32/s_finitef.c (FINITEF): Likewise. * sysdeps/ieee754/ldbl-128/s_finitel.c (__finitel): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_finitel.c (__finitel): Likewise.
2015-09-17Fix tgamma missing underflows (bug 18951).Joseph Myers
Similar to various other bugs in this area, tgamma functions can fail to raise the underflow exception when the result is tiny and inexact but one or more low bits of the intermediate result that is scaled down are zero. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86, mips64 and powerpc. [BZ #18951] * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Force underflow exception for small results. * sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r): Likewise. * math/auto-libm-test-in: Add more tests of tgamma. * math/auto-libm-test-out: Regenerated.
2015-09-16Make scalbn set errno (bug 6803).Joseph Myers
As noted in bug 6803, scalbn fails to set errno on overflow and underflow. This patch fixes this by making scalbn an alias of ldexp, which has exactly the same semantics (for floating-point types with radix 2) and already has wrappers that deal with setting errno, instead of an alias of the internal __scalbn (which ldexp calls). Notes: * Where compat symbols were defined for scalbn functions, I didn't change what they point to (to keep the patch minimal), so such compat symbols continue to go directly to the non-errno-setting functions. * Mike, I didn't do anything with the IA64 versions of these functions, where I think both the ldexp and scalbn functions already deal with setting errno. As a cleanup (not needed to fix this bug) however you might want to make those functions into aliases for IA64; there is no need for them to be separate function implementations at all. * This concludes the fix for bug 6803 since the scalb and scalbln cases of that bug were fixed some time ago. Tested for x86_64, x86, mips64 and powerpc. [BZ #6803] * math/s_ldexp.c (scalbn): Define as weak alias of __ldexp. [NO_LONG_DOUBLE] (scalbnl): Define as weak alias of __ldexp. * math/s_ldexpf.c (scalbnf): Define as weak alias of __ldexpf. * math/s_ldexpl.c (scalbnl): Define as weak alias of __ldexpl. * sysdeps/i386/fpu/s_scalbn.S (scalbn): Remove alias. * sysdeps/i386/fpu/s_scalbnf.S (scalbnf): Likewise. * sysdeps/i386/fpu/s_scalbnl.S (scalbnl): Likewise. * sysdeps/ieee754/dbl-64/s_scalbn.c (scalbn): Likewise. [NO_LONG_DOUBLE] (scalbnl): Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c (scalbn): Likewise. [NO_LONG_DOUBLE] (scalbnl): Likewise. * sysdeps/ieee754/flt-32/s_scalbnf.c (scalbnf): Likewise. * sysdeps/ieee754/ldbl-128/s_scalbnl.c (scalbnl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c (scalbnl): Remove long_double_symbol calls. * sysdeps/ieee754/ldbl-64-128/s_scalbnl.c (scalbnl): Likewise. * sysdeps/ieee754/ldbl-opt/s_ldexpl.c (__ldexpl_2): Define as strong alias of __ldexpl. (scalbnl): Define using long_double_symbol. * sysdeps/m68k/m680x0/fpu/s_scalbn.c (__CONCATX(scalbn,suffix)): Remove alias. * sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c (scalbnl): Likewise. * sysdeps/x86_64/fpu/s_scalbnl.S (scalbnl): Likewise. * math/libm-test.inc (scalbn_test_data): Add errno expectations. (scalbln_test_data): Add more errno expectations.
2015-09-15Simplify hypotf infinity handling (bug 15918).Joseph Myers
Bug 15918 points out that the handling of infinities in hypotf can be simplified: it's enough to return the absolute value of the infinite argument without first comparing it to the other argument and possibly returning that other argument's absolute value. This patch makes that cleanup (which should not change how hypotf behaves on any input). Tested for x86_64. [BZ #15918] * sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Simplify handling of cases where one argument is an infinity.
2015-09-14Fix exp2 missing underflows (bug 16521).Joseph Myers
Various exp2 implementations in glibc can miss underflow exceptions when the scaling down part of the calculation is exact (or, in the x86 case, when the conversion from extended precision to the target precision is exact). This patch forces the exception in a similar way to previous fixes. The x86 exp2f changes may in fact not be needed for this purpose - it's likely to be the case that no argument of type float has an exp2 result so close to an exact subnormal float value that it equals that value when rounded to 64 bits (even taking account of variation between different x86 implementations). However, they are included for consistency with the changes to exp2 and so as to fix the exp2f part of bug 18875 by ensuring that excess range and precision is removed from underflowing return values. Tested for x86_64, x86 and mips64. [BZ #16521] [BZ #18875] * math/e_exp2l.c (__ieee754_exp2l): Force underflow exception for small results. * sysdeps/i386/fpu/e_exp2.S (dbl_min): New object. (MO): New macro. (__ieee754_exp2): For small results, force underflow exception and remove excess range and precision from return value. * sysdeps/i386/fpu/e_exp2f.S (flt_min): New object. (MO): New macro. (__ieee754_exp2f): For small results, force underflow exception and remove excess range and precision from return value. * sysdeps/i386/fpu/e_exp2l.S (ldbl_min): New object. (MO): New macro. (__ieee754_exp2l): Force underflow exception for small results. * sysdeps/ieee754/dbl-64/e_exp2.c (__ieee754_exp2): Likewise. * sysdeps/ieee754/flt-32/e_exp2f.c (__ieee754_exp2f): Likewise. * sysdeps/x86_64/fpu/e_exp2l.S (ldbl_min): New object. (MO): New macro. (__ieee754_exp2l): Force underflow exception for small results. * math/auto-libm-test-in: Add more tests or exp2. * math/auto-libm-test-out: Regenerated.
2015-09-10Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558).Joseph Myers
The existing implementations of lgamma functions (except for the ia64 versions) use the reflection formula for negative arguments. This suffers large inaccuracy from cancellation near zeros of lgamma (near where the gamma function is +/- 1). This patch fixes this inaccuracy. For arguments above -2, there are no zeros and no large cancellation, while for sufficiently large negative arguments the zeros are so close to integers that even for integers +/- 1ulp the log(gamma(1-x)) term dominates and cancellation is not significant. Thus, it is only necessary to take special care about cancellation for arguments around a limited number of zeros. Accordingly, this patch uses precomputed tables of relevant zeros, expressed as the sum of two floating-point values. The log of the ratio of two sines can be computed accurately using log1p in cases where log would lose accuracy. The log of the ratio of two gamma(1-x) values can be computed using Stirling's approximation (the difference between two values of that approximation to lgamma being computable without computing the two values and then subtracting), with appropriate adjustments (which don't reduce accuracy too much) in cases where 1-x is too small to use Stirling's approximation directly. In the interval from -3 to -2, using the ratios of sines and of gamma(1-x) can still produce too much cancellation between those two parts of the computation (and that interval is also the worst interval for computing the ratio between gamma(1-x) values, which computation becomes more accurate, while being less critical for the final result, for larger 1-x). Because this can result in errors slightly above those accepted in glibc, this interval is instead dealt with by polynomial approximations. Separate polynomial approximations to (|gamma(x)|-1)(x-n)/(x-x0) are used for each interval of length 1/8 from -3 to -2, where n (-3 or -2) is the nearest integer to the 1/8-interval and x0 is the zero of lgamma in the relevant half-integer interval (-3 to -2.5 or -2.5 to -2). Together, the two approaches are intended to give sufficient accuracy for all negative arguments in the problem range. Outside that range, the previous implementation continues to be used. Tested for x86_64, x86, mips64 and powerpc. The mips64 and powerpc testing shows up pre-existing problems for ldbl-128 and ldbl-128ibm with large negative arguments giving spurious "invalid" exceptions (exposed by newly added tests for cases this patch doesn't affect the logic for); I'll address those problems separately. [BZ #2542] [BZ #2543] [BZ #2558] * sysdeps/ieee754/dbl-64/e_lgamma_r.c (__ieee754_lgamma_r): Call __lgamma_neg for arguments from -28.0 to -2.0. * sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r): Call __lgamma_negf for arguments from -15.0 to -2.0. * sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r): Call __lgamma_negl for arguments from -48.0 or -50.0 to -2.0. * sysdeps/ieee754/ldbl-96/e_lgammal_r.c (__ieee754_lgammal_r): Call __lgamma_negl for arguments from -33.0 to -2.0. * sysdeps/ieee754/dbl-64/lgamma_neg.c: New file. * sysdeps/ieee754/dbl-64/lgamma_product.c: Likewise. * sysdeps/ieee754/flt-32/lgamma_negf.c: Likewise. * sysdeps/ieee754/flt-32/lgamma_productf.c: Likewise. * sysdeps/ieee754/ldbl-128/lgamma_negl.c: Likewise. * sysdeps/ieee754/ldbl-128/lgamma_productl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/lgamma_productl.c: Likewise. * sysdeps/ieee754/ldbl-96/lgamma_negl.c: Likewise. * sysdeps/ieee754/ldbl-96/lgamma_product.c: Likewise. * sysdeps/ieee754/ldbl-96/lgamma_productl.c: Likewise. * sysdeps/generic/math_private.h (__lgamma_negf): New prototype. (__lgamma_neg): Likewise. (__lgamma_negl): Likewise. (__lgamma_product): Likewise. (__lgamma_productl): Likewise. * math/Makefile (libm-calls): Add lgamma_neg and lgamma_product. * math/auto-libm-test-in: Add more tests of lgamma. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2015-08-13Fix tanh missing underflows (bug 16520).Joseph Myers
Similar to various other bugs in this area, some tanh implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86, mips64 and powerpc. [BZ #16520] * sysdeps/ieee754/dbl-64/s_tanh.c: Include <float.h>. (__tanh): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/flt-32/s_tanhf.c: Include <float.h>. (__tanhf): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128/s_tanhl.c: Include <float.h>. (__tanhl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128ibm/s_tanhl.c: Include <float.h>. (__tanhl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-96/s_tanhl.c: Include <float.h>. (__tanhl): Force underflow exception for arguments with small absolute value. * math/auto-libm-test-in: Add more tests of tanh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update.
2015-08-07Fix tan missing underflows (bug 16517).Joseph Myers
Similar to various other bugs in this area, some tan implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86, mips64 and powerpc. [BZ #16517] * sysdeps/ieee754/dbl-64/s_tan.c: Include <float.h>. (tan): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/flt-32/k_tanf.c: Include <float.h>. (__kernel_tanf): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128/k_tanl.c: Include <float.h>. (__kernel_tanl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128ibm/k_tanl.c: Include <float.h>. (__kernel_tanl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-96/k_tanl.c: Include <float.h>. (__kernel_tanl): Force underflow exception for arguments with small absolute value. * math/auto-libm-test-in: Add more tests of tan. * math/auto-libm-test-out: Regenerated.
2015-08-06Fix sinh missing underflows (bug 16519).Joseph Myers
Similar to various other bugs in this area, some sinh implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86, mips64 and powerpc. [BZ #16519] * sysdeps/ieee754/dbl-64/e_sinh.c: Include <float.h>. (__ieee754_sinh): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/flt-32/e_sinhf.c: Include <float.h>. (__ieee754_sinhf): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128/e_sinhl.c: Include <float.h>. (__ieee754_sinhl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128ibm/e_sinhl.c: Include <float.h>. (__ieee754_sinhl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-96/e_sinhl.c: Include <float.h>. (__ieee754_sinhl): Force underflow exception for arguments with small absolute value. * math/auto-libm-test-in: Add more tests of sinh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 00:55:32 +0000