[llvm] [AMDGPU][True16][CodeGen] fp conversion in true/fake16 format (PR #101678)

[Joe Nash via llvm-commits]

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@@ -1,6 +1,27 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 3
 # RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -mattr=-real-true16 -run-pass=si-fix-sgpr-copies -verify-machineinstrs -o - %s | FileCheck --check-prefixes=GCN %s
 
+---
+name:            cmp_f16
+body:             |
+  bb.0.entry:
+    ; GCN-LABEL: name: cmp_f16
+    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
+    ; GCN-NEXT: [[DEF1:%[0-9]+]]:sreg_32 = IMPLICIT_DEF
+    ; GCN-NEXT: [[V_CVT_F16_U16_fake16_e64_:%[0-9]+]]:vgpr_32 = V_CVT_F16_U16_fake16_e64 [[DEF]], 0, 0, implicit $mode, implicit $exec
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Sisyph wrote:

Please add a comment about using the fake16 instruction till the t16 version is implemented.

https://github.com/llvm/llvm-project/pull/101678