#186 "error: mismatch in operand sizes" on scalar sse instruction

[Anonymous]

i wrote following instruction:

ucomisd XMM1, qword [byte EDI+EAX*8+0xEF]

and nasm return an error:

error: mismatch in operand sizes

on this string.

But

ucomisd XMM1, [byte EDI+EAX*8+0xEF]

was compiled quietly.

I think it's wrong, because this instruction always use qword memory
operand. There is the same problem with following instructions:
MOVD
PINSRW
CVTSI2SD
MOVHPD
MOVHPS
MOVLPD
MOVLPS
CVTPI2PD
CVTPI2PS
SHUFPD
PSLLW
PSLLD
PSLLQ
PSRLW
PSRLD
PSRLQ
PSRAW
PSRAD
and some others

[nasm64developer]

Logged In: YES
user_id=804543

Yes, as of writing this, NASM's instruction database
is missing the appropriate S[BWDQO] flags for quite a
number of entries. (For my local forked version I've
re-written the database from scratch, a process which
revealed numerous issues with the old version.)

Btw, also see SF feature request #560969 ("oword").

[nasm64developer]

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user_id=804543

Fwiw, NASM also fails to complain about the "+0xEF" not
fitting into the requested (signed) byte displacement.
But then, NASM fails to perform such boundary checks in
quite a number of places all over its code. (In my local
forked version there are ~50 of these, half of them in
assemble.c, a few in nasm.c, and the rest throughout the
various output format drivers.)

[nasm64developer]

Logged In: YES
user_id=804543

Fwiw, NASM also fails to complain about the "+0xEF" not
fitting into the requested (signed) byte displacement.
But then, NASM fails to perform such boundary checks in
quite a number of places all over its code. (In my local
forked version there are ~50 of these, half of them in
assemble.c, a few in nasm.c, and the rest throughout the
various output format drivers.)