[llvm] [AMDGPU][True16] Support V_CEIL_F16. (PR #73108)

[Ivan Kosarev via llvm-commits]

================
@@ -5250,10 +5250,15 @@ unsigned SIInstrInfo::getVALUOp(const MachineInstr &MI) const {
   case AMDGPU::S_FLOOR_F32: return AMDGPU::V_FLOOR_F32_e64;
   case AMDGPU::S_TRUNC_F32: return AMDGPU::V_TRUNC_F32_e64;
   case AMDGPU::S_RNDNE_F32: return AMDGPU::V_RNDNE_F32_e64;
-  case AMDGPU::S_CEIL_F16: return AMDGPU::V_CEIL_F16_t16_e64;
-  case AMDGPU::S_FLOOR_F16: return AMDGPU::V_FLOOR_F16_t16_e64;
-  case AMDGPU::S_TRUNC_F16: return AMDGPU::V_TRUNC_F16_t16_e64;
-  case AMDGPU::S_RNDNE_F16: return AMDGPU::V_RNDNE_F16_t16_e64;
+  case AMDGPU::S_CEIL_F16:
+    return ST.useRealTrue16Insts() ? AMDGPU::V_CEIL_F16_t16_e64
+                                   : AMDGPU::V_CEIL_F16_fake16_e64;
----------------
kosarev wrote:

@mbrkusanin Mirko, we don't seem to have any coverage for this `S_CEIL_F16` case. Should we add some?

https://github.com/llvm/llvm-project/pull/73108