diff options
Diffstat (limited to 'sysdeps/i386/fpu/s_expm1f.S')
| -rw-r--r-- | sysdeps/i386/fpu/s_expm1f.S | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/sysdeps/i386/fpu/s_expm1f.S b/sysdeps/i386/fpu/s_expm1f.S deleted file mode 100644 index a1cb5bf0ab..0000000000 --- a/sysdeps/i386/fpu/s_expm1f.S +++ /dev/null @@ -1,112 +0,0 @@ -/* ix87 specific implementation of exp(x)-1. - Copyright (C) 1996-2024 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 - <https://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> -#include <libm-alias-float.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: .quad 0xb8aa3b295c17f0bc /* 1.442695040888963407359924681002 */ - .short 0x3fff - 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) -libm_alias_float (__expm1, expm1) |