When writing inline assembler, is there a way to force the use of the rex.W prefix?
So instead of
“psllq $12, %%xmm1n”
generating
66 0f x73 f1 0c
I want
66 48 0f x73 f1 0c
with the extra 0x48 rex.W prefix.
When writing inline assembler, is there a way to force the use of the rex.W prefix?
So instead of
“psllq $12, %%xmm1n”
generating
66 0f x73 f1 0c
I want
66 48 0f x73 f1 0c
with the extra 0x48 rex.W prefix.