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Implement the wasm sign-extension-ops proposal.

Browse Source 
https://github.com/WebAssembly/sign-extension-ops/
This commit is contained in:
Dan Gohman
2018-02-28 12:02:14 -08:00
parent 227baaadb8
commit 1cf9a8d669
1 changed files with 28 additions and 5 deletions
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33
lib/wasm/src/code_translator.rs
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@@ -634,12 +634,35 @@ pub fn translate_operator<FE: FuncEnvironment + ?Sized>(
let val = state.pop1(); let val = state.pop1();
state.push1(builder.ins().bitcast(I64, val)); state.push1(builder.ins().bitcast(I64, val));
} }
Operator::I32Extend8S | Operator::I32Extend8S => {
Operator::I32Extend16S | let val = state.pop1();
Operator::I64Extend8S | state.push1(builder.ins().ireduce(I8, val));
Operator::I64Extend16S | let val = state.pop1();
state.push1(builder.ins().sextend(I32, val));
}
Operator::I32Extend16S => {
let val = state.pop1();
state.push1(builder.ins().ireduce(I16, val));
let val = state.pop1();
state.push1(builder.ins().sextend(I32, val));
}
Operator::I64Extend8S => {
let val = state.pop1();
state.push1(builder.ins().ireduce(I8, val));
let val = state.pop1();
state.push1(builder.ins().sextend(I64, val));
}
Operator::I64Extend16S => {
let val = state.pop1();
state.push1(builder.ins().ireduce(I8, val));
let val = state.pop1();
state.push1(builder.ins().sextend(I64, val));
}
Operator::I64Extend32S => { Operator::I64Extend32S => {
panic!("proposed sign-extend operators not yet supported"); let val = state.pop1();
state.push1(builder.ins().ireduce(I32, val));
let val = state.pop1();
state.push1(builder.ins().sextend(I64, val));
} }
/****************************** Binary Operators ************************************/ /****************************** Binary Operators ************************************/
Operator::I32Add | Operator::I64Add => { Operator::I32Add | Operator::I64Add => {