inline asm memory operand always uses 64-bit addressing

[dlangBugzillaToGithub]

Martin Nowak (@MartinNowak) reported this on 2014-06-08T16:43:33Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=12878

CC List

• Orvid King
• Walter Bright (@WalterBright)

Description

cat > bug.d << CODE
void main()
{
    asm
    {
        mov EAX, [ESI];
        movdqu XMM0, [ESI];
    }
}
CODE

dmd -c bug.d
objdump -d bug.o
----
   4:	8b 06                	mov    (%rsi),%eax
   6:	f3 0f 6f 06          	movdqu (%rsi),%xmm0
----
The compiler should emit an address size prefix (67H) like so.
----
  15:	67 8b 06             	mov    (%esi),%eax
  18:	67 f3 0f 6f 06       	movdqu (%esi),%xmm0
----

[dlangBugzillaToGithub]

dlang-bot commented on 2020-08-14T09:45:22Z

@WalterBright created dlang/dmd pull request #11571 "fix Issue 12878 - inline asm memory operand always uses 64-bit addres…" fixing this issue:

- fix Issue 12878 - inline asm memory operand always uses 64-bit addressing

https://github.com/dlang/dmd/pull/11571