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Diffstat (limited to 'libFLAC/ia32/cpu_asm.nasm')
| -rw-r--r-- | libFLAC/ia32/cpu_asm.nasm | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/libFLAC/ia32/cpu_asm.nasm b/libFLAC/ia32/cpu_asm.nasm new file mode 100644 index 0000000..f5eb110 --- /dev/null +++ b/libFLAC/ia32/cpu_asm.nasm @@ -0,0 +1,121 @@ +; 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 |