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Michael_R_8
Beginner
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Wrong memory size for VGATHERQPS (?)

My version of the document, 319433-022, page 350 shows

EVEX.128.66.0F38.W0 93 /vsib
VGATHERQPS xmm1 {k1}, vm64x

I think this should be vm32x, not vm64x, since the operands are single-precision floats.

Similarly for the other two encodings of this instruction.

Please check other gather/scatter instructions that they are correct also.

 

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MarkC_Intel
Moderator
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vm32{x,y,z} is for dword (32b) indices. vm64{x,y,z} is for qword (64b) indicies. pdf page 107 of rev 22 has an explanation.  I think it is correct as-is. Sorry.

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