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Bug 20207 – (inline asm) DMD (x64) assembles code that contains both REX and high byte of a general purpouse register

Status: NEW
Severity: minor
Priority: P3
Component: dmd
Product: D
Version: D2
Platform: x86_64
OS: Windows
Creation time: 2019-09-12T09:56:39Z
Last change time: 2024-12-13T19:05:30Z
Keywords: iasm
Assigned to: No Owner
Creator: Eugen Ajechiloae

Comments

Comment #0 by eugenajechiloae — 2019-09-12T09:56:39Z

The following code assembles: add R12B, AH. When there is REX prefix, the high byte of the general purpouse registers can't be used, so this should not assemble. As expected, the instruction above actually does -- add R12B, SPL -- (adding SPL instead of AH).

Comment #1 by robert.schadek — 2024-12-13T19:05:30Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/17922 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB