https://llvm.org/bugs/show_bug.cgi?id=30524
Bug ID: 30524
Summary: [mc][gfx8] Many f16 insns do not support VOP3 encoding
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AMDGPU
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected]
Classification: Unclassified
Created attachment 17349
--> https://llvm.org/bugs/attachment.cgi?id=17349&action=edit
00022.tests_tg_gfx8_asm_lit1_bug.06.24.F16-VOP3-MUST-FAIL.zip
The following instructions do not have e64 (VOP3) encoding:
> v_add_f16
> v_ceil_f16
> v_cos_f16
> v_exp_f16
> v_fract_f16
> v_cvt_i16_f16
> v_frexp_exp_i16_f16
> v_frexp_mant_f16
> v_ldexp_f16
> v_log_f16
> v_mac_f16
> v_max_f16
> v_min_f16
> v_mul_f16
> v_rcp_f16
> v_rndne_f16
> v_rsq_f16
> v_sin_f16
> v_sqrt_f16
> v_sub_f16
> v_subrev_f16
> v_trunc_f16
Assembly of these instructions with enforced e64 encoding should lead to
errors.
Subsequently, output and input modifiers are not supported as well and should
lead to errors.
Tested with r282249 (git# 3b62127, 2016-09-23 16:35:43 +0300).
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