[FP16] Implement conversion operations. (#6974)

Note: FP16 is a little different from F32/F64 since it can't represent
the full 2^16 integer range. 65504 is the max whole integer. This leads
to some slightly strange behavior when converting integers greater than
65504 since they become infinity.


Specified at
https://github.com/WebAssembly/half-precision/blob/main/proposals/half-precision/Overview.md

1 files changed, 8 insertions, 0 deletions

diff --git a/src/wasm-interpreter.h b/src/wasm-interpreter.h
index 25303abfe..9659a5c34 100644
--- a/src/wasm-interpreter.h
+++ b/src/wasm-interpreter.h
@@ -632,6 +632,14 @@ public:
         return value.demoteZeroToF32x4();
       case PromoteLowVecF32x4ToVecF64x2:
         return value.promoteLowToF64x2();
+      case TruncSatSVecF16x8ToVecI16x8:
+        return value.truncSatToSI16x8();
+      case TruncSatUVecF16x8ToVecI16x8:
+        return value.truncSatToUI16x8();
+      case ConvertSVecI16x8ToVecF16x8:
+        return value.convertSToF16x8();
+      case ConvertUVecI16x8ToVecF16x8:
+        return value.convertUToF16x8();
       case InvalidUnary:
         WASM_UNREACHABLE("invalid unary op");
     }