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|
; vim:filetype=nasm ts=8
; libFLAC - Free Lossless Audio Codec library
; Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Josh Coalson
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
;
; - Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
;
; - Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in the
; documentation and/or other materials provided with the distribution.
;
; - Neither the name of the Xiph.org Foundation nor the names of its
; contributors may be used to endorse or promote products derived from
; this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
; ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
%include "nasm.h"
data_section
cglobal FLAC__cpu_have_cpuid_asm_ia32
cglobal FLAC__cpu_info_asm_ia32
cglobal FLAC__cpu_info_extended_amd_asm_ia32
code_section
; **********************************************************************
;
; FLAC__uint32 FLAC__cpu_have_cpuid_asm_ia32()
;
cident FLAC__cpu_have_cpuid_asm_ia32
push ebx
pushfd
pop eax
mov edx, eax
xor eax, 0x00200000
push eax
popfd
pushfd
pop eax
cmp eax, edx
jz .no_cpuid
mov eax, 1
jmp .end
.no_cpuid:
xor eax, eax
.end:
pop ebx
ret
; **********************************************************************
;
; void FLAC__cpu_info_asm_ia32(FLAC__uint32 *flags_edx, FLAC__uint32 *flags_ecx)
;
cident FLAC__cpu_info_asm_ia32
;[esp + 8] == flags_edx
;[esp + 12] == flags_ecx
push ebx
call FLAC__cpu_have_cpuid_asm_ia32
test eax, eax
jz .no_cpuid
mov eax, 1
cpuid
mov ebx, [esp + 8]
mov [ebx], edx
mov ebx, [esp + 12]
mov [ebx], ecx
jmp .end
.no_cpuid
xor eax, eax
mov ebx, [esp + 8]
mov [ebx], eax
mov ebx, [esp + 12]
mov [ebx], eax
.end
pop ebx
ret
cident FLAC__cpu_info_extended_amd_asm_ia32
push ebx
call FLAC__cpu_have_cpuid_asm_ia32
test eax, eax
jz .no_cpuid
mov eax, 0x80000000
cpuid
cmp eax, 0x80000001
jb .no_cpuid
mov eax, 0x80000001
cpuid
mov eax, edx
jmp .end
.no_cpuid
xor eax, eax
.end
pop ebx
ret
end
%ifdef OBJ_FORMAT_elf
section .note.GNU-stack noalloc
%endif
|
