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authorZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
committerZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
commit5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch)
tree4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/i386/fpu/s_expm1f.S
parent199fc19d3aaaf57944ef036e15904febe877fc93 (diff)
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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/i386/fpu/s_expm1f.S')
-rw-r--r--sysdeps/i386/fpu/s_expm1f.S113
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diff --git a/sysdeps/i386/fpu/s_expm1f.S b/sysdeps/i386/fpu/s_expm1f.S
deleted file mode 100644
index 4f0b2e7832..0000000000
--- a/sysdeps/i386/fpu/s_expm1f.S
+++ /dev/null
@@ -1,113 +0,0 @@
-/* ix87 specific implementation of exp(x)-1.
- Copyright (C) 1996-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
- Based on code by John C. Bowman <bowman@ipp-garching.mpg.de>.
- Corrections by H.J. Lu (hjl@gnu.ai.mit.edu), 1997.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
- /* Using: e^x - 1 = 2^(x * log2(e)) - 1 */
-
-#include <sysdep.h>
-#include <machine/asm.h>
-#include <i386-math-asm.h>
-
- .section .rodata
-
- .align ALIGNARG(4)
- .type minus1,@object
-minus1: .double -1.0
- ASM_SIZE_DIRECTIVE(minus1)
- .type one,@object
-one: .double 1.0
- ASM_SIZE_DIRECTIVE(one)
- .type l2e,@object
-l2e: .tfloat 1.442695040888963407359924681002
- ASM_SIZE_DIRECTIVE(l2e)
-
-DEFINE_FLT_MIN
-
-#ifdef PIC
-#define MO(op) op##@GOTOFF(%edx)
-#else
-#define MO(op) op
-#endif
-
- .text
-ENTRY(__expm1f)
- movzwl 4+2(%esp), %eax
- xorb $0x80, %ah // invert sign bit (now 1 is "positive")
- cmpl $0xc2b1, %eax // is num >= 88.5?
- jae HIDDEN_JUMPTARGET (__expf)
-
- flds 4(%esp) // x
- fxam // Is NaN, +-Inf or +-0?
- xorb $0x80, %ah
- cmpl $0xc190, %eax // is num <= -18.0?
- fstsw %ax
- movb $0x45, %ch
- jb 4f
-
- // Below -18.0 (may be -NaN or -Inf).
- andb %ah, %ch
-#ifdef PIC
- LOAD_PIC_REG (dx)
-#endif
- cmpb $0x01, %ch
- je 5f // If -NaN, jump.
- jmp 2f // -large, possibly -Inf.
-
-4: // In range -18.0 to 88.5 (may be +-0 but not NaN or +-Inf).
- andb %ah, %ch
- cmpb $0x40, %ch
- je 3f // If +-0, jump.
-#ifdef PIC
- LOAD_PIC_REG (dx)
-#endif
-
-5: fldt MO(l2e) // log2(e) : x
- fmulp // log2(e)*x
- fld %st // log2(e)*x : log2(e)*x
- // Set round-to-nearest temporarily.
- subl $8, %esp
- cfi_adjust_cfa_offset (8)
- fstcw 4(%esp)
- movl $0xf3ff, %ecx
- andl 4(%esp), %ecx
- movl %ecx, (%esp)
- fldcw (%esp)
- frndint // int(log2(e)*x) : log2(e)*x
- fldcw 4(%esp)
- addl $8, %esp
- cfi_adjust_cfa_offset (-8)
- fsubr %st, %st(1) // int(log2(e)*x) : fract(log2(e)*x)
- fxch // fract(log2(e)*x) : int(log2(e)*x)
- f2xm1 // 2^fract(log2(e)*x)-1 : int(log2(e)*x)
- fscale // 2^(log2(e)*x)-2^int(log2(e)*x) : int(log2(e)*x)
- fxch // int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x)
- fldl MO(one) // 1 : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x)
- fscale // 2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x)
- fsubrl MO(one) // 1-2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x)
- fstp %st(1) // 1-2^int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x)
- fsubrp %st, %st(1) // 2^(log2(e)*x)
- FLT_CHECK_FORCE_UFLOW
- ret
-
-2: fstp %st
- fldl MO(minus1) // Set result to -1.0.
-3: ret
-END(__expm1f)
-weak_alias (__expm1f, expm1f)