mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-26 15:23:48 +01:00
5e0efd1a25
Using LAME 3.10 Windows project files substantially changed from original, and included into audacity solution.
108 lines
1.8 KiB
Plaintext
108 lines
1.8 KiB
Plaintext
;
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;
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; assembler routines to detect CPU-features
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;
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; MMX / 3DNow! / SSE / SSE2
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;
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; for the LAME project
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; Frank Klemm, Robert Hegemann 2000-10-12
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;
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%include "nasm.h"
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globaldef has_MMX_nasm
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globaldef has_3DNow_nasm
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globaldef has_SSE_nasm
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globaldef has_SSE2_nasm
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segment_code
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testCPUID:
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pushfd
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pop eax
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mov ecx,eax
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xor eax,0x200000
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push eax
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popfd
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pushfd
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pop eax
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cmp eax,ecx
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ret
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;---------------------------------------
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; int has_MMX_nasm (void)
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;---------------------------------------
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has_MMX_nasm:
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pushad
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call testCPUID
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jz return0 ; no CPUID command, so no MMX
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mov eax,0x1
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CPUID
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test edx,0x800000
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jz return0 ; no MMX support
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jmp return1 ; MMX support
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;---------------------------------------
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; int has_SSE_nasm (void)
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;---------------------------------------
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has_SSE_nasm:
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pushad
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call testCPUID
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jz return0 ; no CPUID command, so no SSE
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mov eax,0x1
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CPUID
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test edx,0x02000000
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jz return0 ; no SSE support
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jmp return1 ; SSE support
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;---------------------------------------
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; int has_SSE2_nasm (void)
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;---------------------------------------
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has_SSE2_nasm:
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pushad
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call testCPUID
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jz return0 ; no CPUID command, so no SSE2
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mov eax,0x1
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CPUID
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test edx,0x04000000
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jz return0 ; no SSE2 support
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jmp return1 ; SSE2 support
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;---------------------------------------
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; int has_3DNow_nasm (void)
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;---------------------------------------
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has_3DNow_nasm:
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pushad
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call testCPUID
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jz return0 ; no CPUID command, so no 3DNow!
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mov eax,0x80000000
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CPUID
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cmp eax,0x80000000
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jbe return0 ; no extended MSR(1), so no 3DNow!
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mov eax,0x80000001
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CPUID
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test edx,0x80000000
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jz return0 ; no 3DNow! support
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; 3DNow! support
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return1:
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popad
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xor eax,eax
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inc eax
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ret
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return0:
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popad
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xor eax,eax
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ret
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end
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