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64 bit assembler => UASM Assembler Development => Topic started by: Biterider on November 28, 2019, 07:09:23 AM

Title: REX error message
Post by: Biterider on November 28, 2019, 07:09:23 AM
Hi
Today I tried this line:

Code: [Select]
movzx rax, dh
and got the following error message

Quote
Error A2256: Registers AH-DH may not be used with SPL-DIL or R8-R15

which is a bit misleading because rax is used here. yasm gives the error message:

Quote
error: cannot use A/B/C/DH with instruction needing REX

which seems to be more appropriate...

Biterider