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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 /REORG.TODO/sysdeps/i386/fpu/s_asinh.S | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.xz 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 'REORG.TODO/sysdeps/i386/fpu/s_asinh.S')
-rw-r--r-- | REORG.TODO/sysdeps/i386/fpu/s_asinh.S | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/fpu/s_asinh.S b/REORG.TODO/sysdeps/i386/fpu/s_asinh.S new file mode 100644 index 0000000000..1a60f7de2c --- /dev/null +++ b/REORG.TODO/sysdeps/i386/fpu/s_asinh.S @@ -0,0 +1,139 @@ +/* ix87 specific implementation of arcsinh. + 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. + + 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/>. */ + +#include <machine/asm.h> + + .section .rodata + + .align ALIGNARG(4) + .type huge,@object +huge: .double 1e+300 + ASM_SIZE_DIRECTIVE(huge) + .type one,@object +one: .double 1.0 + ASM_SIZE_DIRECTIVE(one) + .type limit,@object +limit: .double 0.29 + ASM_SIZE_DIRECTIVE(limit) + +#ifdef PIC +#define MO(op) op##@GOTOFF(%edx) +#else +#define MO(op) op +#endif + + .text +ENTRY(__asinh) + movl 8(%esp), %ecx + movl $0x7fffffff, %eax + andl %ecx, %eax + andl $0x80000000, %ecx + movl %eax, %edx + orl $0x800fffff, %edx + incl %edx + jz 7f // x in ħInf or NaN + xorl %ecx, 8(%esp) + fldl 4(%esp) // |x| + cmpl $0x3e300000, %eax + jb 2f // |x| < 2^-28 + fldln2 // log(2) : |x| + cmpl $0x41b00000, %eax + fxch // |x| : log(2) + ja 3f // |x| > 2^28 +#ifdef PIC + LOAD_PIC_REG (dx) +#endif + cmpl $0x40000000, %eax + ja 5f // |x| > 2 + + // 2^-28 <= |x| <= 2 => y = sign(x)*log1p(|x|+|x|^2/(1+sqrt(1+|x|^2))) + fld %st // |x| : |x| : log(2) + fmul %st(1) // |x|^2 : |x| : log(2) + fld %st // |x|^2 : |x|^2 : |x| : log(2) + faddl MO(one) // 1+|x|^2 : |x|^2 : |x| : log(2) + fsqrt // sqrt(1+|x|^2) : |x|^2 : |x| : log(2) + faddl MO(one) // 1+sqrt(1+|x|^2) : |x|^2 : |x| : log(2) + fdivrp // |x|^2/(1+sqrt(1+|x|^2)) : |x| : log(2) + faddp // |x|+|x|^2/(1+sqrt(1+|x|^2)) : log(2) + fcoml MO(limit) + fnstsw + sahf + ja 6f + fyl2xp1 + jecxz 4f + fchs +4: ret + +7: fldl 4(%esp) + ret + +6: faddl MO(one) + fyl2x + jecxz 4f + fchs +4: ret + + // |x| < 2^-28 => y = x (inexact iff |x| != 0.0) + .align ALIGNARG(4) +2: +#ifdef PIC + LOAD_PIC_REG (dx) +#endif + jecxz 4f + fchs // x +4: fld %st // x : x + faddl MO(huge) // huge+x : x + fstp %st(0) // x + cmpl $0x00100000, %eax + jae 8f + subl $8, %esp + cfi_adjust_cfa_offset (8) + fld %st(0) + fmul %st(0) + fstpl (%esp) + addl $8, %esp + cfi_adjust_cfa_offset (-8) +8: ret + + // |x| > 2^28 => y = sign(x) * (log(|x|) + log(2)) + .align ALIGNARG(4) +3: fyl2x // log(|x|) + fldln2 // log(2) : log(|x|) + faddp // log(|x|)+log(2) + jecxz 4f + fchs +4: ret + + // |x| > 2 => y = sign(x) * log(2*|x| + 1/(|x|+sqrt(x*x+1))) + .align ALIGNARG(4) +5: fld %st // |x| : |x| : log(2) + fadd %st, %st(1) // |x| : 2*|x| : log(2) + fld %st // |x| : |x| : 2*|x| : log(2) + fmul %st(1) // |x|^2 : |x| : 2*|x| : log(2) + faddl MO(one) // 1+|x|^2 : |x| : 2*|x| : log(2) + fsqrt // sqrt(1+|x|^2) : |x| : 2*|x| : log(2) + faddp // |x|+sqrt(1+|x|^2) : 2*|x| : log(2) + fdivrl MO(one) // 1/(|x|+sqrt(1+|x|^2)) : 2*|x| : log(2) + faddp // 2*|x|+1/(|x|+sqrt(1+|x|^2)) : log(2) + fyl2x // log(2*|x|+1/(|x|+sqrt(1+|x|^2))) + jecxz 4f + fchs +4: ret +END(__asinh) +weak_alias (__asinh, asinh) |