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Truncate over-large parameters to splat (#1276)

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See https://github.com/WebAssembly/simd/issues/149 for associated discussion on this.
This commit is contained in:
Andrew Brown
2019-12-12 13:52:26 -08:00
committed by GitHub
parent 396eba5235
commit af64187ec7
1 changed files with 7 additions and 6 deletions
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13
cranelift/wasm/src/code_translator.rs
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@@ -1093,15 +1093,16 @@ pub fn translate_operator<FE: FuncEnvironment + ?Sized>(
// the v128.const is typed in CLIF as a I8x16 but raw_bitcast to a different type before use
state.push1(value)
}
Operator::I8x16Splat
| Operator::I16x8Splat
| Operator::I32x4Splat
Operator::I8x16Splat | Operator::I16x8Splat => {
let reduced = builder.ins().ireduce(type_of(op).lane_type(), state.pop1());
let splatted = builder.ins().splat(type_of(op), reduced);
state.push1(splatted)
}
Operator::I32x4Splat
| Operator::I64x2Splat
| Operator::F32x4Splat
| Operator::F64x2Splat => {
let value_to_splat = state.pop1();
let ty = type_of(op);
let splatted = builder.ins().splat(ty, value_to_splat);
let splatted = builder.ins().splat(type_of(op), state.pop1());
state.push1(splatted)
}
Operator::I8x16ExtractLaneS { lane } | Operator::I16x8ExtractLaneS { lane } => {