2015-09-19 04:34:59 +08:00
|
|
|
/* Helper macros for x86 libm functions.
|
2023-01-07 05:08:04 +08:00
|
|
|
Copyright (C) 2015-2023 Free Software Foundation, Inc.
|
2015-09-19 04:34:59 +08:00
|
|
|
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
|
Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
|
|
|
<https://www.gnu.org/licenses/>. */
|
2015-09-19 04:34:59 +08:00
|
|
|
|
|
|
|
|
#ifndef _I386_MATH_ASM_H
|
|
|
|
|
#define _I386_MATH_ASM_H 1
|
|
|
|
|
|
|
|
|
|
/* Remove excess range and precision by storing a value on the stack
|
|
|
|
|
and loading it back. */
|
|
|
|
|
#define FLT_NARROW_EVAL \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
flds (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4);
|
|
|
|
|
#define DBL_NARROW_EVAL \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
fldl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8);
|
|
|
|
|
|
2015-09-19 05:53:22 +08:00
|
|
|
/* Define constants for the minimum value of a floating-point
|
|
|
|
|
type. */
|
|
|
|
|
#define DEFINE_FLT_MIN \
|
|
|
|
|
.section .rodata.cst4,"aM",@progbits,4; \
|
|
|
|
|
.p2align 2; \
|
|
|
|
|
.type flt_min,@object; \
|
|
|
|
|
flt_min: \
|
|
|
|
|
.byte 0, 0, 0x80, 0; \
|
|
|
|
|
.size flt_min, .-flt_min;
|
|
|
|
|
#define DEFINE_DBL_MIN \
|
|
|
|
|
.section .rodata.cst8,"aM",@progbits,8; \
|
|
|
|
|
.p2align 3; \
|
|
|
|
|
.type dbl_min,@object; \
|
|
|
|
|
dbl_min: \
|
|
|
|
|
.byte 0, 0, 0, 0, 0, 0, 0x10, 0; \
|
|
|
|
|
.size dbl_min, .-dbl_min;
|
Refactor i386 libm code forcing underflow exceptions.
This patch refactors code in sysdeps/i386/fpu that forces underflow
exceptions to use common macros for that purpose as far as possible.
(Although some of the macros end up used in only one place, I think
it's cleanest to define all these macros together so that all the code
forcing underflow uses such macros. Some more uses of such macros
will also be introduced when fixing remaining bugs about missing
underflow exceptions, and it would be possible to do further
refactoring of the macros in i386-math-asm.h to share more code by
using other macros internally. Places that test for underflow by
examining the representation of the argument with integer operations,
rather that using floating-point comparisons on the argument or
result, are unchanged by this patch.)
Most of this code uses a macro MO to abstract away the differences
between PIC and non-PIC memory references to constants. log1p
functions, however, hardcoded PIC conditionals for this. Because the
common macros rely on the use of MO, I changed the log1p functions to
use the normal style here, and, for consistency, also made that change
to log1pl which is otherwise unaffected by this patch.
Tested for x86.
* sysdeps/i386/fpu/i386-math-asm.h (DEFINE_LDBL_MIN): New macro.
(FLT_CHECK_FORCE_UFLOW): Likewise.
(DBL_CHECK_FORCE_UFLOW): Likewise.
(FLT_CHECK_FORCE_UFLOW_NARROW): Likewise.
(DBL_CHECK_FORCE_UFLOW_NARROW): Likewise.
(LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN): Likewise.
(FLT_CHECK_FORCE_UFLOW_NONNAN): Likewise.
(DBL_CHECK_FORCE_UFLOW_NONNAN): Likewise.
(FLT_CHECK_FORCE_UFLOW_NONNEG): Likewise.
(DBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
(LDBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
* sysdeps/i386/fpu/e_asin.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_asin): Use DBL_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/e_asinf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_asinf): Use FLT_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/e_atan2.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_atan2): Use DBL_CHECK_FORCE_UFLOW_NARROW.
* sysdeps/i386/fpu/e_atan2f.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_atan2f): Use FLT_CHECK_FORCE_UFLOW_NARROW.
* sysdeps/i386/fpu/e_atanh.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_atanh): Use DBL_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/e_atanhf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_atanhf): Use FLT_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/e_exp2l.S: Include <i386-math-asm.h>.
(ldbl_min): Replace with use of DEFINE_LDBL_MIN.
(__ieee754_exp2l): Use LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN.
* sysdeps/i386/fpu/e_expl.S: Include <i386-math-asm.h>.
[!USE_AS_EXPM1L] (cmin): Replace with use of DEFINE_LDBL_MIN.
(IEEE754_EXPL): Use LDBL_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/s_atan.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__atan): Use DBL_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/s_atanf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__atanf): Use FLT_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/s_expm1.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__expm1): Use DBL_CHECK_FORCE_UFLOW. Move underflow check after
main computation.
* sysdeps/i386/fpu/s_expm1f.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__expm1f): Use FLT_CHECK_FORCE_UFLOW. Move underflow check after
main computation.
* sysdeps/i386/fpu/s_log1p.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(MO): New macro.
(__log1p): Use MO. Use DBL_CHECK_FORCE_UFLOW_NONNAN.
* sysdeps/i386/fpu/s_log1pf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(MO): New macro.
(__log1pf): Use MO. Use FLT_CHECK_FORCE_UFLOW_NONNAN.
* sysdeps/i386/fpu/s_log1pl.S (MO): New macro.
(__log1pl): Use MO.
2015-09-25 05:41:00 +08:00
|
|
|
#define DEFINE_LDBL_MIN \
|
|
|
|
|
.section .rodata.cst16,"aM",@progbits,16; \
|
|
|
|
|
.p2align 4; \
|
|
|
|
|
.type ldbl_min,@object; \
|
|
|
|
|
ldbl_min: \
|
|
|
|
|
.byte 0, 0, 0, 0, 0, 0, 0, 0x80, 0x1, 0; \
|
|
|
|
|
.byte 0, 0, 0, 0, 0, 0; \
|
|
|
|
|
.size ldbl_min, .-ldbl_min;
|
2015-09-19 05:53:22 +08:00
|
|
|
|
|
|
|
|
/* Remove excess range and precision by storing a value on the stack
|
|
|
|
|
and loading it back. The value is given to be nonnegative or NaN;
|
|
|
|
|
if it is subnormal, also force an underflow exception. The
|
|
|
|
|
relevant constant for the minimum of the type must have been
|
|
|
|
|
defined, the MO macro must have been defined for access to memory
|
|
|
|
|
operands, and, if PIC, the PIC register must have been loaded. */
|
|
|
|
|
#define FLT_NARROW_EVAL_UFLOW_NONNEG_NAN \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
flds MO(flt_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
6424: fstps (%esp); \
|
|
|
|
|
flds (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4);
|
|
|
|
|
#define DBL_NARROW_EVAL_UFLOW_NONNEG_NAN \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fldl MO(dbl_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
6453: fstpl (%esp); \
|
|
|
|
|
fldl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8);
|
|
|
|
|
|
|
|
|
|
/* Likewise, but the argument is not a NaN (so fcom instructions,
|
|
|
|
|
which support memory operands, can be used). */
|
|
|
|
|
#define FLT_NARROW_EVAL_UFLOW_NONNEG \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fcoms MO(flt_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
6424: fstps (%esp); \
|
|
|
|
|
flds (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4);
|
|
|
|
|
#define DBL_NARROW_EVAL_UFLOW_NONNEG \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fcoml MO(dbl_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
6453: fstpl (%esp); \
|
|
|
|
|
fldl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8);
|
|
|
|
|
|
2015-09-26 06:29:10 +08:00
|
|
|
/* Likewise, but the non-NaN argument may be negative. */
|
|
|
|
|
#define FLT_NARROW_EVAL_UFLOW_NONNAN \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fcomps MO(flt_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
6424: fstps (%esp); \
|
|
|
|
|
flds (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4);
|
|
|
|
|
#define DBL_NARROW_EVAL_UFLOW_NONNAN \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fcompl MO(dbl_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
6453: fstpl (%esp); \
|
|
|
|
|
fldl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8);
|
|
|
|
|
|
Refactor i386 libm code forcing underflow exceptions.
This patch refactors code in sysdeps/i386/fpu that forces underflow
exceptions to use common macros for that purpose as far as possible.
(Although some of the macros end up used in only one place, I think
it's cleanest to define all these macros together so that all the code
forcing underflow uses such macros. Some more uses of such macros
will also be introduced when fixing remaining bugs about missing
underflow exceptions, and it would be possible to do further
refactoring of the macros in i386-math-asm.h to share more code by
using other macros internally. Places that test for underflow by
examining the representation of the argument with integer operations,
rather that using floating-point comparisons on the argument or
result, are unchanged by this patch.)
Most of this code uses a macro MO to abstract away the differences
between PIC and non-PIC memory references to constants. log1p
functions, however, hardcoded PIC conditionals for this. Because the
common macros rely on the use of MO, I changed the log1p functions to
use the normal style here, and, for consistency, also made that change
to log1pl which is otherwise unaffected by this patch.
Tested for x86.
* sysdeps/i386/fpu/i386-math-asm.h (DEFINE_LDBL_MIN): New macro.
(FLT_CHECK_FORCE_UFLOW): Likewise.
(DBL_CHECK_FORCE_UFLOW): Likewise.
(FLT_CHECK_FORCE_UFLOW_NARROW): Likewise.
(DBL_CHECK_FORCE_UFLOW_NARROW): Likewise.
(LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN): Likewise.
(FLT_CHECK_FORCE_UFLOW_NONNAN): Likewise.
(DBL_CHECK_FORCE_UFLOW_NONNAN): Likewise.
(FLT_CHECK_FORCE_UFLOW_NONNEG): Likewise.
(DBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
(LDBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
* sysdeps/i386/fpu/e_asin.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_asin): Use DBL_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/e_asinf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_asinf): Use FLT_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/e_atan2.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_atan2): Use DBL_CHECK_FORCE_UFLOW_NARROW.
* sysdeps/i386/fpu/e_atan2f.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_atan2f): Use FLT_CHECK_FORCE_UFLOW_NARROW.
* sysdeps/i386/fpu/e_atanh.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_atanh): Use DBL_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/e_atanhf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_atanhf): Use FLT_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/e_exp2l.S: Include <i386-math-asm.h>.
(ldbl_min): Replace with use of DEFINE_LDBL_MIN.
(__ieee754_exp2l): Use LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN.
* sysdeps/i386/fpu/e_expl.S: Include <i386-math-asm.h>.
[!USE_AS_EXPM1L] (cmin): Replace with use of DEFINE_LDBL_MIN.
(IEEE754_EXPL): Use LDBL_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/s_atan.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__atan): Use DBL_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/s_atanf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__atanf): Use FLT_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/s_expm1.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__expm1): Use DBL_CHECK_FORCE_UFLOW. Move underflow check after
main computation.
* sysdeps/i386/fpu/s_expm1f.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__expm1f): Use FLT_CHECK_FORCE_UFLOW. Move underflow check after
main computation.
* sysdeps/i386/fpu/s_log1p.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(MO): New macro.
(__log1p): Use MO. Use DBL_CHECK_FORCE_UFLOW_NONNAN.
* sysdeps/i386/fpu/s_log1pf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(MO): New macro.
(__log1pf): Use MO. Use FLT_CHECK_FORCE_UFLOW_NONNAN.
* sysdeps/i386/fpu/s_log1pl.S (MO): New macro.
(__log1pl): Use MO.
2015-09-25 05:41:00 +08:00
|
|
|
/* Force an underflow exception if the given value is subnormal. The
|
|
|
|
|
relevant constant for the minimum of the type must have been
|
|
|
|
|
defined, the MO macro must have been defined for access to memory
|
|
|
|
|
operands, and, if PIC, the PIC register must have been loaded. */
|
|
|
|
|
#define FLT_CHECK_FORCE_UFLOW \
|
|
|
|
|
flds MO(flt_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4); \
|
|
|
|
|
6424:
|
|
|
|
|
#define DBL_CHECK_FORCE_UFLOW \
|
|
|
|
|
fldl MO(dbl_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8); \
|
|
|
|
|
6453:
|
|
|
|
|
|
|
|
|
|
/* Likewise, but also remove excess range and precision if the value
|
|
|
|
|
is subnormal. */
|
|
|
|
|
#define FLT_CHECK_FORCE_UFLOW_NARROW \
|
|
|
|
|
flds MO(flt_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
flds (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4); \
|
|
|
|
|
6424:
|
|
|
|
|
#define DBL_CHECK_FORCE_UFLOW_NARROW \
|
|
|
|
|
fldl MO(dbl_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
fldl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8); \
|
|
|
|
|
6453:
|
|
|
|
|
|
|
|
|
|
/* Likewise, but the argument is nonnegative or NaN. */
|
|
|
|
|
#define LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN \
|
|
|
|
|
fldt MO(ldbl_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fucompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6464f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstp %st(0); \
|
|
|
|
|
6464:
|
|
|
|
|
|
|
|
|
|
/* Likewise, but the argument is not a NaN. */
|
|
|
|
|
#define FLT_CHECK_FORCE_UFLOW_NONNAN \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fcomps MO(flt_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4); \
|
|
|
|
|
6424:
|
|
|
|
|
#define DBL_CHECK_FORCE_UFLOW_NONNAN \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fcompl MO(dbl_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8); \
|
|
|
|
|
6453:
|
2015-09-26 06:29:10 +08:00
|
|
|
#define LDBL_CHECK_FORCE_UFLOW_NONNAN \
|
|
|
|
|
fldt MO(ldbl_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fabs; \
|
|
|
|
|
fcompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6464f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstp %st(0); \
|
|
|
|
|
6464:
|
Refactor i386 libm code forcing underflow exceptions.
This patch refactors code in sysdeps/i386/fpu that forces underflow
exceptions to use common macros for that purpose as far as possible.
(Although some of the macros end up used in only one place, I think
it's cleanest to define all these macros together so that all the code
forcing underflow uses such macros. Some more uses of such macros
will also be introduced when fixing remaining bugs about missing
underflow exceptions, and it would be possible to do further
refactoring of the macros in i386-math-asm.h to share more code by
using other macros internally. Places that test for underflow by
examining the representation of the argument with integer operations,
rather that using floating-point comparisons on the argument or
result, are unchanged by this patch.)
Most of this code uses a macro MO to abstract away the differences
between PIC and non-PIC memory references to constants. log1p
functions, however, hardcoded PIC conditionals for this. Because the
common macros rely on the use of MO, I changed the log1p functions to
use the normal style here, and, for consistency, also made that change
to log1pl which is otherwise unaffected by this patch.
Tested for x86.
* sysdeps/i386/fpu/i386-math-asm.h (DEFINE_LDBL_MIN): New macro.
(FLT_CHECK_FORCE_UFLOW): Likewise.
(DBL_CHECK_FORCE_UFLOW): Likewise.
(FLT_CHECK_FORCE_UFLOW_NARROW): Likewise.
(DBL_CHECK_FORCE_UFLOW_NARROW): Likewise.
(LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN): Likewise.
(FLT_CHECK_FORCE_UFLOW_NONNAN): Likewise.
(DBL_CHECK_FORCE_UFLOW_NONNAN): Likewise.
(FLT_CHECK_FORCE_UFLOW_NONNEG): Likewise.
(DBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
(LDBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
* sysdeps/i386/fpu/e_asin.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_asin): Use DBL_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/e_asinf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_asinf): Use FLT_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/e_atan2.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_atan2): Use DBL_CHECK_FORCE_UFLOW_NARROW.
* sysdeps/i386/fpu/e_atan2f.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_atan2f): Use FLT_CHECK_FORCE_UFLOW_NARROW.
* sysdeps/i386/fpu/e_atanh.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__ieee754_atanh): Use DBL_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/e_atanhf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__ieee754_atanhf): Use FLT_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/e_exp2l.S: Include <i386-math-asm.h>.
(ldbl_min): Replace with use of DEFINE_LDBL_MIN.
(__ieee754_exp2l): Use LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN.
* sysdeps/i386/fpu/e_expl.S: Include <i386-math-asm.h>.
[!USE_AS_EXPM1L] (cmin): Replace with use of DEFINE_LDBL_MIN.
(IEEE754_EXPL): Use LDBL_CHECK_FORCE_UFLOW_NONNEG.
* sysdeps/i386/fpu/s_atan.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__atan): Use DBL_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/s_atanf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__atanf): Use FLT_CHECK_FORCE_UFLOW.
* sysdeps/i386/fpu/s_expm1.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(__expm1): Use DBL_CHECK_FORCE_UFLOW. Move underflow check after
main computation.
* sysdeps/i386/fpu/s_expm1f.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(__expm1f): Use FLT_CHECK_FORCE_UFLOW. Move underflow check after
main computation.
* sysdeps/i386/fpu/s_log1p.S: Include <i386-math-asm.h>.
(dbl_min): Replace with use of DEFINE_DBL_MIN.
(MO): New macro.
(__log1p): Use MO. Use DBL_CHECK_FORCE_UFLOW_NONNAN.
* sysdeps/i386/fpu/s_log1pf.S: Include <i386-math-asm.h>.
(flt_min): Replace with use of DEFINE_FLT_MIN.
(MO): New macro.
(__log1pf): Use MO. Use FLT_CHECK_FORCE_UFLOW_NONNAN.
* sysdeps/i386/fpu/s_log1pl.S (MO): New macro.
(__log1pl): Use MO.
2015-09-25 05:41:00 +08:00
|
|
|
|
|
|
|
|
/* Likewise, but the argument is nonnegative and not a NaN. */
|
|
|
|
|
#define FLT_CHECK_FORCE_UFLOW_NONNEG \
|
|
|
|
|
fcoms MO(flt_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6424f; \
|
|
|
|
|
subl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstps (%esp); \
|
|
|
|
|
addl $4, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-4); \
|
|
|
|
|
6424:
|
|
|
|
|
#define DBL_CHECK_FORCE_UFLOW_NONNEG \
|
|
|
|
|
fcoml MO(dbl_min); \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6453f; \
|
|
|
|
|
subl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstpl (%esp); \
|
|
|
|
|
addl $8, %esp; \
|
|
|
|
|
cfi_adjust_cfa_offset (-8); \
|
|
|
|
|
6453:
|
|
|
|
|
#define LDBL_CHECK_FORCE_UFLOW_NONNEG \
|
|
|
|
|
fldt MO(ldbl_min); \
|
|
|
|
|
fld %st(1); \
|
|
|
|
|
fcompp; \
|
|
|
|
|
fnstsw; \
|
|
|
|
|
sahf; \
|
|
|
|
|
jnc 6464f; \
|
|
|
|
|
fld %st(0); \
|
|
|
|
|
fmul %st(0); \
|
|
|
|
|
fstp %st(0); \
|
|
|
|
|
6464:
|
|
|
|
|
|
2015-09-19 04:34:59 +08:00
|
|
|
#endif /* i386-math-asm.h. */
|