28 lines
486 B
NASM
28 lines
486 B
NASM
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; Simple RDTSC reader for NASM
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;
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; build with "nasm -f ___ timer.asm" where ___ is coff or elf [or whatever]
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;
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; Most *nix installs use elf so it would be "nasm -f elf timer.asm"
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;
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; Tom St Denis
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[bits 32]
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[section .data]
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timer dd 0, 0
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[section .text]
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[global _rdtsc]
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_rdtsc:
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rdtsc
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sub eax,[timer]
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sbb edx,[timer+4]
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ret
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[global _reset]
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_reset:
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push eax
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push edx
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rdtsc
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mov [timer],eax
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mov [timer+4],edx
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pop edx
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pop eax
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ret
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