diff options
Diffstat (limited to 'REORG.TODO/sysdeps/i386/fpu/e_atanhf.S')
| -rw-r--r-- | REORG.TODO/sysdeps/i386/fpu/e_atanhf.S | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/fpu/e_atanhf.S b/REORG.TODO/sysdeps/i386/fpu/e_atanhf.S new file mode 100644 index 0000000000..92fda3fd82 --- /dev/null +++ b/REORG.TODO/sysdeps/i386/fpu/e_atanhf.S @@ -0,0 +1,109 @@ +/* ix87 specific implementation of arctanh function. + 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> +#include <i386-math-asm.h> + + .section .rodata + + .align ALIGNARG(4) + .type half,@object +half: .double 0.5 + ASM_SIZE_DIRECTIVE(half) + .type one,@object +one: .double 1.0 + ASM_SIZE_DIRECTIVE(one) + .type limit,@object +limit: .double 0.29 + ASM_SIZE_DIRECTIVE(limit) + .align ALIGNARG(4) + .type ln2_2,@object +ln2_2: .tfloat 0.3465735902799726547086160 + ASM_SIZE_DIRECTIVE(ln2_2) + +DEFINE_FLT_MIN + +#ifdef PIC +#define MO(op) op##@GOTOFF(%edx) +#else +#define MO(op) op +#endif + + .text +ENTRY(__ieee754_atanhf) + movl 4(%esp), %ecx + + movl %ecx, %eax + andl $0x7fffffff, %eax + cmpl $0x7f800000, %eax + ja 5f + +#ifdef PIC + LOAD_PIC_REG (dx) +#endif + + andl $0x80000000, %ecx // ECX == 0 iff X >= 0 + + fldt MO(ln2_2) // 0.5*ln2 + xorl %ecx, 4(%esp) + flds 4(%esp) // |x| : 0.5*ln2 + fcoml MO(half) // |x| : 0.5*ln2 + fld %st(0) // |x| : |x| : 0.5*ln2 + fnstsw // |x| : |x| : 0.5*ln2 + sahf + jae 2f + fadd %st, %st(1) // |x| : 2*|x| : 0.5*ln2 + fld %st // |x| : |x| : 2*|x| : 0.5*ln2 + fsubrl MO(one) // 1-|x| : |x| : 2*|x| : 0.5*ln2 + fxch // |x| : 1-|x| : 2*|x| : 0.5*ln2 + fmul %st(2) // 2*|x|^2 : 1-|x| : 2*|x| : 0.5*ln2 + fdivp // (2*|x|^2)/(1-|x|) : 2*|x| : 0.5*ln2 + faddp // 2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2 + fcoml MO(limit) // 2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2 + fnstsw // 2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2 + sahf + jae 4f + fyl2xp1 // 0.5*ln2*ld(1+2*|x|+(2*|x|^2)/(1-|x|)) + FLT_CHECK_FORCE_UFLOW_NONNEG + jecxz 3f + fchs // 0.5*ln2*ld(1+2*x+(2*x^2)/(1-x)) +3: ret + + .align ALIGNARG(4) +4: faddl MO(one) // 1+2*|x|+(2*|x|^2)/(1-|x|) : 0.5*ln2 + fyl2x // 0.5*ln2*ld(1+2*|x|+(2*|x|^2)/(1-|x|)) + jecxz 3f + fchs // 0.5*ln2*ld(1+2*x+(2*x^2)/(1-x)) +3: ret + + .align ALIGNARG(4) +2: faddl MO(one) // 1+|x| : |x| : 0.5*ln2 + fxch // |x| : 1+|x| : 0.5*ln2 + fsubrl MO(one) // 1-|x| : 1+|x| : 0.5*ln2 + fdivrp // (1+|x|)/(1-|x|) : 0.5*ln2 + fyl2x // 0.5*ln2*ld((1+|x|)/(1-|x|)) + jecxz 3f + fchs // 0.5*ln2*ld((1+x)/(1-x)) +3: ret + + // x == NaN +5: flds 4(%esp) + ret +END(__ieee754_atanhf) +strong_alias (__ieee754_atanhf, __atanhf_finite) |