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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/ia64/fpu/e_ilogbl.S | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/ia64/fpu/e_ilogbl.S')
-rw-r--r-- | sysdeps/ia64/fpu/e_ilogbl.S | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/sysdeps/ia64/fpu/e_ilogbl.S b/sysdeps/ia64/fpu/e_ilogbl.S deleted file mode 100644 index 8d67d4fb31..0000000000 --- a/sysdeps/ia64/fpu/e_ilogbl.S +++ /dev/null @@ -1,268 +0,0 @@ -.file "ilogbl.s" - - -// Copyright (c) 2000 - 2003, Intel Corporation -// All rights reserved. -// -// Contributed 2000 by the Intel Numerics Group, Intel Corporation -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// -// * Redistributions in binary form must reproduce the above copyright -// notice, this list of conditions and the following disclaimer in the -// documentation and/or other materials provided with the distribution. -// -// * The name of Intel Corporation may not be used to endorse or promote -// products derived from this software without specific prior written -// permission. - -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS -// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY -// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING -// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// -// Intel Corporation is the author of this code, and requests that all -// problem reports or change requests be submitted to it directly at -// http://www.intel.com/software/products/opensource/libraries/num.htm. -// -// History -//============================================================== -// 02/03/00 Initial version -// 05/26/00 Fix bug when x a double-extended denormal; -// if x=0 call error routine, per C9X -// 08/15/00 Bundle added after call to __libm_error_support to properly -// set [the previously overwritten] GR_Parameter_RESULT. -// 01/20/01 Fixed result for x=0 -// 05/20/02 Cleaned up namespace and sf0 syntax -// 01/20/03 Improved performance -// -// API -//============================================================== -// int ilogbl( long double x ); -// -// Overview of operation -//============================================================== -// The ilogbl function extracts the exponent of x as an integer -// and returns it in r8 -// -// ilogbl is similar to logbl but differs in the following ways: -// +-inf -// ilogbl: returns INT_MAX -// logbl: returns +inf -// Nan returns FP_LOGBNAN (which is either INT_MAX or INT_MIN) -// ilogbl: returns INT_MAX (7fffffff) -// logbl: returns QNAN (quietized SNAN) -// 0 returns FP_ILOGB0 (which is either INT_MIN or -INT_MAX) -// ilogbl: returns -INT_MAX (80000001) -// logbl: returns -inf, raises the divide-by-zero exception, -// and calls libm_error_support to set domain error -// -// Registers used -//============================================================== -// general registers used: -// r26 -> r39 -// r36 -> r39 used as parameters to error path -// -// predicate registers used: -// p6 -> p10 -// floating-point registers used: -// f9, f10, f11 -// f8, input - -rExpBias = r26 -rExpMask = r27 -rSignexp_x = r28 -rExp_x = r29 -rIntMax = r30 -rExp_2to64 = r31 - -GR_SAVE_PFS = r32 -rTrialResult = r33 -GR_SAVE_B0 = r34 -GR_SAVE_GP = r35 - -GR_Parameter_X = r36 -GR_Parameter_Y = r37 -GR_Parameter_RESULT = r38 -GR_Parameter_TAG = r39 - -fTmp = f9 -fNorm_x = f10 -f2to64 = f11 - -.section .text -GLOBAL_LIBM_ENTRY(__ieee754_ilogbl) - -// X NORMAL -// TrueExp_x = exp(f8) - 0xffff -// r8 = TrueExp_x -{ .mfi - getf.exp rSignexp_x = f8 - fclass.m p8,p0 = f8, 0x0b // Test for x unorm - mov rExpBias = 0xffff // Exponent bias -} -{ .mfi - nop.m 0 - fnorm.s1 fNorm_x = f8 - mov rExpMask = 0x1ffff // Exponent mask -} -;; - -// Form signexp of 2^64 in case need to scale denormal -{ .mfb - mov rExp_2to64 = 0x1003f - fclass.m p6,p9 = f8, 0x1e3 // Test x natval, nan, inf -(p8) br.cond.spnt ILOGB_DENORM // Branch if x unorm -} -;; - -ILOGB_COMMON: -// Return here from ILOGB_DENORM -{ .mfi - and rExp_x = rSignexp_x, rExpMask // Get biased exponent - fclass.m p7,p10 = f8, 0x07 // Test x zero - nop.i 0 -} -{ .mlx - nop.m 0 - movl rIntMax = 0x000000007fffffff // Form INT_MAX -} -;; - -.pred.rel "mutex",p6,p9 -{ .mfi -(p9) sub r8 = rExp_x, rExpBias // Get true exponent for normal path -(p6) fma.s0 fTmp = f8, f8, f0 // Dummy to set Invalid flag -(p6) mov r8 = rIntMax // If nan, inf, return INT_MAX -} -{ .mbb - nop.m 0 -(p7) br.cond.spnt ILOGB_ZERO // Branch if x zero -(p10) br.ret.sptk b0 // Exit if x not zero -} -;; - - -ILOGB_DENORM: -// Form 2^64 in case need to scale denormal -// Check to see if double-extended denormal -{ .mfi - setf.exp f2to64 = rExp_2to64 - fclass.m p8,p0 = fNorm_x, 0x0b - nop.i 0 -} -;; - -{ .mfi - nop.m 0 - fcmp.eq.s0 p7,p0 = f8, f0 // Dummy op to set denormal flag - nop.i 0 -} -;; - -// If double-extended denormal add 64 to exponent bias for scaling -// If double-extended denormal form x * 2^64 which is normal -{ .mfi -(p8) add rExpBias = 64, rExpBias -(p8) fmpy.s1 fNorm_x = fNorm_x, f2to64 - nop.i 0 -} -;; - -// Logic is the same as normal path but use normalized input -{ .mib - getf.exp rSignexp_x = fNorm_x - nop.i 0 - br.cond.sptk ILOGB_COMMON // Return to main path -} -;; - -ILOGB_ZERO: -// Here if x zero -// Return INT_MIN, call error support - -{ .mlx - alloc r32=ar.pfs,1,3,4,0 - movl rTrialResult = 0x0000000080000000 -} -{ .mib - mov GR_Parameter_TAG = 156 // Error code - nop.i 0 - br.cond.sptk __libm_error_region // Call error support -} -;; - -GLOBAL_LIBM_END(__ieee754_ilogbl) - - -LOCAL_LIBM_ENTRY(__libm_error_region) -.prologue - -{ .mfi - add GR_Parameter_Y=-32,sp // Parameter 2 value - nop.f 0 -.save ar.pfs,GR_SAVE_PFS - mov GR_SAVE_PFS=ar.pfs // Save ar.pfs -} -{ .mfi -.fframe 64 - add sp=-64,sp // Create new stack - nop.f 0 - mov GR_SAVE_GP=gp // Save gp -};; - -{ .mmi - stfe [GR_Parameter_Y] = f0,16 // STORE Parameter 2 on stack - add GR_Parameter_X = 16,sp // Parameter 1 address -.save b0, GR_SAVE_B0 - mov GR_SAVE_B0=b0 // Save b0 -};; - -.body -{ .mib - stfe [GR_Parameter_X] = f8 // STORE Parameter 1 on stack - add GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address - nop.b 0 -} -{ .mib - stfe [GR_Parameter_Y] = f9 // Store Parameter 3 on stack - add GR_Parameter_Y = -16,GR_Parameter_Y - br.call.sptk b0=__libm_error_support# // Call error handling function -};; - -{ .mmi - add GR_Parameter_RESULT = 48,sp - nop.m 0 - nop.i 0 -};; - -{ .mmi - mov r8 = rTrialResult -.restore sp - add sp = 64,sp // Restore stack pointer - mov b0 = GR_SAVE_B0 // Restore return address -};; - -{ .mib - mov gp = GR_SAVE_GP // Restore gp - mov ar.pfs = GR_SAVE_PFS // Restore ar.pfs - br.ret.sptk b0 -};; - -LOCAL_LIBM_END(__libm_error_region) - - -.type __libm_error_support#,@function -.global __libm_error_support# |