File: cpu_has_sse2.S

package info (click to toggle)
ikarus 0.0.3+bzr.2010.01.26-4
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd, sid
  • size: 39,868 kB
  • ctags: 9,284
  • sloc: lisp: 47,954; ansic: 13,247; sh: 4,595; java: 641; asm: 366; makefile: 264; awk: 186; perl: 66
file content (43 lines) | stat: -rw-r--r-- 1,100 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
#  Ikarus Scheme -- A compiler for R6RS Scheme.
#  Copyright (C) 2006,2007,2008  Abdulaziz Ghuloum
#  
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License version 3 as
#  published by the Free Software Foundation.
#  
#  This program 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
#  General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.


.text
.globl cpu_has_sse2
.globl _cpu_has_sse2

.align 8

cpu_has_sse2:
_cpu_has_sse2:
  # callee-save registers are $ebx, %esi, %edi, %esp, $ebp
  # cpuid modifies %eax, %ebx, %ecx, %edx
  # only %ebx needs to be saved/restored
#if __x86_64__
  push %rbx
#else
  push %ebx
#endif
  movl $1, %eax
  cpuid
  movl %edx, %eax
  sarl $26, %eax
  andl $1, %eax
#if __x86_64__
  pop %rbx
#else
  pop %ebx
#endif
  ret