[llvm] [AMDGPU] Use `v_cvt_pk_*` instructions for i16_f32 saturated conversions (PR #202680)

[Jay Foad via llvm-commits]

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@@ -724,6 +724,21 @@ def S_MAX_U32 : SOP2_32 <"s_max_u32",
 } // End isCommutable = 1
 } // End Defs = [SCC]
 
+// f32 -> i16 saturated conversions. Required because those conversions
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jayfoad wrote:

Do the S_CVT_U32_F32 / S_CVT_I32_F32 instructions saturate?

https://github.com/llvm/llvm-project/pull/202680