mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* Helper macros for x86_64 libm functions.
|
|
Copyright (C) 2015-2019 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _X86_64_MATH_ASM_H
|
|
#define _X86_64_MATH_ASM_H 1
|
|
|
|
/* Define constants for the minimum value of a floating-point
|
|
type. */
|
|
#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;
|
|
|
|
/* Force an underflow exception if the given value (nonnegative or
|
|
NaN) 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 LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN \
|
|
fldt MO(ldbl_min); \
|
|
fld %st(1); \
|
|
fucomip %st(1), %st(0); \
|
|
fstp %st(0); \
|
|
jnc 6464f; \
|
|
fld %st(0); \
|
|
fmul %st(0); \
|
|
fstp %st(0); \
|
|
6464:
|
|
|
|
/* Likewise, but the argument is not a NaN. */
|
|
#define LDBL_CHECK_FORCE_UFLOW_NONNAN \
|
|
fldt MO(ldbl_min); \
|
|
fld %st(1); \
|
|
fabs; \
|
|
fcomip %st(1), %st(0); \
|
|
fstp %st(0); \
|
|
jnc 6464f; \
|
|
fld %st(0); \
|
|
fmul %st(0); \
|
|
fstp %st(0); \
|
|
6464:
|
|
|
|
/* Likewise, but the argument is nonnegative and not a NaN. */
|
|
#define LDBL_CHECK_FORCE_UFLOW_NONNEG \
|
|
fldt MO(ldbl_min); \
|
|
fld %st(1); \
|
|
fcomip %st(1), %st(0); \
|
|
fstp %st(0); \
|
|
jnc 6464f; \
|
|
fld %st(0); \
|
|
fmul %st(0); \
|
|
fstp %st(0); \
|
|
6464:
|
|
|
|
#endif /* x86_64-math-asm.h. */
|