65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
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// Copyright 2017 The go-interpreter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package operators
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import (
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"regexp"
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"github.com/go-interpreter/wagon/wasm"
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)
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var reCvrtOp = regexp.MustCompile(`(.+)\.(?:[a-z]|\_)+\/(.+)`)
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func valType(s string) wasm.ValueType {
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switch s {
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case "i32":
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return wasm.ValueTypeI32
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case "i64":
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return wasm.ValueTypeI64
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case "f32":
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return wasm.ValueTypeF32
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case "f64":
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return wasm.ValueTypeF64
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default:
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panic("Invalid value type string: " + s)
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}
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}
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func newConversionOp(code byte, name string) byte {
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matches := reCvrtOp.FindStringSubmatch(name)
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if len(matches) == 0 {
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panic(name + " is not a conversion operator")
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}
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returns := valType(matches[1])
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param := valType(matches[2])
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return newOp(code, name, []wasm.ValueType{param}, returns)
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}
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var (
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I32WrapI64 = newConversionOp(0xa7, "i32.wrap/i64")
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I32TruncSF32 = newConversionOp(0xa8, "i32.trunc_s/f32")
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I32TruncUF32 = newConversionOp(0xa9, "i32.trunc_u/f32")
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I32TruncSF64 = newConversionOp(0xaa, "i32.trunc_s/f64")
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I32TruncUF64 = newConversionOp(0xab, "i32.trunc_u/f64")
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I64ExtendSI32 = newConversionOp(0xac, "i64.extend_s/i32")
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I64ExtendUI32 = newConversionOp(0xad, "i64.extend_u/i32")
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I64TruncSF32 = newConversionOp(0xae, "i64.trunc_s/f32")
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I64TruncUF32 = newConversionOp(0xaf, "i64.trunc_u/f32")
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I64TruncSF64 = newConversionOp(0xb0, "i64.trunc_s/f64")
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I64TruncUF64 = newConversionOp(0xb1, "i64.trunc_u/f64")
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F32ConvertSI32 = newConversionOp(0xb2, "f32.convert_s/i32")
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F32ConvertUI32 = newConversionOp(0xb3, "f32.convert_u/i32")
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F32ConvertSI64 = newConversionOp(0xb4, "f32.convert_s/i64")
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F32ConvertUI64 = newConversionOp(0xb5, "f32.convert_u/i64")
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F32DemoteF64 = newConversionOp(0xb6, "f32.demote/f64")
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F64ConvertSI32 = newConversionOp(0xb7, "f64.convert_s/i32")
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F64ConvertUI32 = newConversionOp(0xb8, "f64.convert_u/i32")
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F64ConvertSI64 = newConversionOp(0xb9, "f64.convert_s/i64")
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F64ConvertUI64 = newConversionOp(0xba, "f64.convert_u/i64")
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F64PromoteF32 = newConversionOp(0xbb, "f64.promote/f32")
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)
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