[llvm-bugs] [Bug 43484] New: [AMDGPU][MC][GFX10][WS32] Incorrect disassembly of v_cmp_*_sdwa opcodes
via llvm-bugs
llvm-bugs at lists.llvm.org
Fri Sep 27 09:12:52 PDT 2019
https://bugs.llvm.org/show_bug.cgi?id=43484
Bug ID: 43484
Summary: [AMDGPU][MC][GFX10][WS32] Incorrect disassembly of
v_cmp_*_sdwa opcodes
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AMDGPU
Assignee: unassignedbugs at nondot.org
Reporter: dpreobrazhensky at luxoft.com
CC: llvm-bugs at lists.llvm.org
These instructions are decoded incorrectly in wavesize=32 mode. dst size is
invalid. An example:
0xf9,0x04,0x1e,0x7d,0x01,0xfb,0x06,0x06
Should be decoded as follows:
v_cmp_class_f16_sdwa ttmp15, v1, v2 src0_sel:DWORD src1_sel:DWORD
Actual result:
v_cmp_class_f16_sdwa ttmp[14:15], v1, v2 src0_sel:DWORD src1_sel:DWORD
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