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0x2e & 0x3e prefixes

DISCUSSION Maciej Hrebien 1 participant 2 messages Aug 23, 2003 – Sep 7, 2003

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Hi there,

p4 & xeon cpus (as part of the sse2 extension) have branch hints prefixes (0x2e, 0x3e). My question is: are there any mnemonics for it? How gas/nasm handles this issue? Hard coding only?

Regards,

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Maciej Hrebien
#1 lore raw
Quoted 3 lines · Maciej Hrebien

p4 & xeon cpus (as part of the sse2 extension) have branch hints prefixes (0x2e, 0x3e). My question is: are there any mnemonics for it?

Forgotten post.. it's "jcc,pn" or "jcc,pt" (echo "l:.byte 0x2e;je l;.byte 0x3e;je l"|as|objdump -x).

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Maciej Hrebien