https://issues.dlang.org/show_bug.cgi?id=12971

Orvid King <blah38621@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |blah38621@gmail.com
                 OS|Linux                       |All

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https://issues.dlang.org/show_bug.cgi?id=12971

Orvid King <blah38621@gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |wrong-code

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https://issues.dlang.org/show_bug.cgi?id=12971

Orvid King <blah38621@gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |iasm

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https://issues.dlang.org/show_bug.cgi?id=12971

--- Comment #1 from Orvid King <blah38621@gmail.com> ---
As a bit more information, this is caused by a missing REX prefix, and also applies to OR, XOR, AND, ADD, SUB, and a few other instructions that use op-code 0x80 as their (I know there's a name for the set, but I can't remember it or find it anywhere :( )

I believe it is also limited to the r8, imm8 version of the op-codes.

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https://issues.dlang.org/show_bug.cgi?id=12971

--- Comment #2 from safety0ff.bugz <safety0ff.bugz@gmail.com> ---
SIL is broken beyond recognition:
SHR SIL, 1; // DMD outputs SHR DH, 1
movzx CX, SIL; // movzbw CX, DH

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https://issues.dlang.org/show_bug.cgi?id=12971

safety0ff.bugz <safety0ff.bugz@gmail.com> changed:

           What    |Removed                     |Added
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            Summary|DMD inline asm outputs      |Missing REX prefix for 8
                   |wrong AND instruction       |bit register access

--- Comment #3 from safety0ff.bugz <safety0ff.bugz@gmail.com> ---
Likely affects SPL, BPL, SIL and DIL since they all require REX.

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https://issues.dlang.org/show_bug.cgi?id=12971

safety0ff.bugz <safety0ff.bugz@gmail.com> changed:

           What    |Removed                     |Added
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           See Also|                            |https://issues.dlang.org/sh
                   |                            |ow_bug.cgi?id=9965

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https://issues.dlang.org/show_bug.cgi?id=12971

safety0ff.bugz <safety0ff.bugz@gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |pull

--- Comment #4 from safety0ff.bugz <safety0ff.bugz@gmail.com> ---
https://github.com/D-Programming-Language/dmd/pull/4554

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https://issues.dlang.org/show_bug.cgi?id=12971

github-bugzilla@puremagic.com changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

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https://issues.dlang.org/show_bug.cgi?id=12971

--- Comment #5 from github-bugzilla@puremagic.com ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/c056b9dd2dfb6f03e0a3cb0c98c0c85b64dfe5d8 Fix issue 12971 - Missing REX prefix for 8 bit register access

https://github.com/D-Programming-Language/dmd/commit/0bd6aad8f49221886275bc965d8bd25a0160e7a2 Merge pull request #4554 from WalterWaldron/fix12971

Fix issue 12971 - Missing REX prefix for 8 bit register access

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