https://bugs.llvm.org/show_bug.cgi?id=45926
Bug ID: 45926
Summary: [AMDGPU][MC][GFX8+] Instructions v_sub_u16_e64,
v_subrev_u16_e64 and v_add_u16_e64 do not support
clamp modifier
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AMDGPU
Assignee: unassignedb...@nondot.org
Reporter: dpreobrazhen...@luxoft.com
CC: llvm-bugs@lists.llvm.org
According to sp3 documentation, both _e64 and _sdwa variants of these opcodes
should support clamp. However llvm assembler supports clamp for _sdwa variants
only.
These opcodes were renamed to v_*_nc_u16 in gfx10 - they should also be
corrected to support clamp.
Examples of failed tests:
v_sub_u16_e64 v5, v1, v2 clamp // gfx8, gfx9
v_sub_nc_u16 v5, v1, v2 clamp // gfx10
An example of a passed test:
v_sub_u16_sdwa v5, v1, v2 clamp // gfx8, gfx9
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