[llvm-bugs] [Bug 28204] New: [mc][gfx7] VOP3b v_mad_i64_i32/u64_u32 -- Missing support for DST1.
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Jun 20 04:23:50 PDT 2016
https://llvm.org/bugs/show_bug.cgi?id=28204
Bug ID: 28204
Summary: [mc][gfx7] VOP3b v_mad_i64_i32/u64_u32 -- Missing
support for DST1.
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AMDGPU
Assignee: artem.tamazov at amd.com
Reporter: artem.tamazov at amd.com
CC: llvm-bugs at lists.llvm.org, nikolay.haustov at amd.com
Classification: Unclassified
Created attachment 16585
--> https://llvm.org/bugs/attachment.cgi?id=16585&action=edit
02684.tests_tg_gfx7_asm_lit1_bug.06.08.min.v_mad_X64_X32.zip
In VOP3b encoding, these instructions use second destination for carry-out.
Most probably, the issue appears for other sub-targets as well, e.g. gfx8.
Tested with r273139 (git # 4a94acfea8bfd6eb6b5809dd40f03e1fa42e673a)
GFX7 lit tests attached.
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