1 /* ix87 specific frexp implementation for double.
2 Copyright (C) 1997-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #include <machine/asm.h>
20 #include <libm-alias-double.h>
26 two54: .byte 0, 0, 0, 0, 0, 0, 0x50, 0x43
27 ASM_SIZE_DIRECTIVE(two54)
30 #define MO(op) op##@GOTOFF(%edx)
35 #define PARMS 4 /* no space for saved regs */
46 andl $0x7fffffff, %eax
50 cmpl $0x7ff00000, %eax
53 cmpl $0x00100000, %eax
66 andl $0x7fffffff, %eax
69 andl $0x800fffff, %edx
75 /* Store %ecx in the variable pointed to by the second argument,
76 get the factor from the stack and return. */
77 1: movl EXPP(%esp), %eax
83 libm_alias_double (__frexp, frexp)