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[Wasm RyuJIT] Basic implementation of int to float casts without overflow checks #126209

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Merged
kg merged 3 commits into from
Mar 28, 2026
+30 −2
Merged

[Wasm RyuJIT] Basic implementation of int to float casts without overflow checks #126209

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c8fb917
Basic implementation of int to float casts without overflow checks
kg Mar 27, 2026
07b9f19
Cleanup
kg Mar 27, 2026
1fbac74
jit-format
kg Mar 27, 2026
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32 changes: 30 additions & 2 deletions src/coreclr/jit/codegenwasm.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1097,11 +1097,39 @@ void CodeGen::genFloatToIntCast(GenTree* tree)
//
// Notes:
// Handles casts from TYP_INT/TYP_LONG to TYP_FLOAT/TYP_DOUBLE.
// Currently not implemented (NYI_WASM).
//
void CodeGen::genIntToFloatCast(GenTree* tree)
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{
NYI_WASM("genIntToFloatCast");
assert(tree->OperIs(GT_CAST));
assert(!tree->gtOverflow());

GenTreeCast* cast = tree->AsCast();
var_types toType = tree->TypeGet();
var_types fromType = genActualType(cast->CastOp()->TypeGet());
instruction ins = INS_none;

genConsumeOperands(cast);

switch (PackTypes(toType, fromType))
{
case PackTypes(TYP_FLOAT, TYP_INT):
ins = cast->IsUnsigned() ? INS_f32_convert_u_i32 : INS_f32_convert_s_i32;
break;
case PackTypes(TYP_DOUBLE, TYP_INT):
ins = cast->IsUnsigned() ? INS_f64_convert_u_i32 : INS_f64_convert_s_i32;
break;
case PackTypes(TYP_FLOAT, TYP_LONG):
ins = cast->IsUnsigned() ? INS_f32_convert_u_i64 : INS_f32_convert_s_i64;
break;
case PackTypes(TYP_DOUBLE, TYP_LONG):
ins = cast->IsUnsigned() ? INS_f64_convert_u_i64 : INS_f64_convert_s_i64;
break;
default:
unreached();
}

GetEmitter()->emitIns(ins);
WasmProduceReg(tree);
}

//------------------------------------------------------------------------
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