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[Bug inline-asm/10899] "Illegal Instruction" when using PMULUDQ in asm
- From: "zimbricchio at libero dot it" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 May 2003 08:46:41 -0000
- Subject: [Bug inline-asm/10899] "Illegal Instruction" when using PMULUDQ in asm
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10899
zimbricchio@libero.it changed:
What |Removed |Added
----------------------------------------------------------------------------
Alias| |PMULUDQ
Component|other |inline-asm
Version|3.2 |3.4
------- Additional Comments From zimbricchio@libero.it 2003-05-22 08:46 -------
gcc translates PMULUDQ with an erroneous OPCODE according to the "AMD64 Architecture Programmer's Manual", on AMD64 architecture (but i think on Intel64 too) the OPCODEs for this instruction should be: 0F F4 /r when operands are mmx registers or 64-bit memory locations 66 0F F4 /r when operands are xmm registers or 128-bit memory locations
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