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compiler: implement complex division

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This is hard to do correctly, so copy the relevant files from the Go
compiler itself.

For related discussions:
* https://github.com/golang/go/issues/14644
* https://github.com/golang/go/issues/29846
This commit is contained in:
Ayke van Laethem
2019-05-04 23:02:32 +02:00
committed by Ron Evans
parent d7460b945e
commit 4ae4ef5e12
6 changed files with 138 additions and 1 deletions
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compiler/compiler.go
+13 -1
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@@ -1856,8 +1856,20 @@ func (c *Compiler) parseBinOp(op token.Token, typ types.Type, x, y llvm.Value, p
cplx = c.builder.CreateInsertValue(cplx, r, 0, "")
cplx = c.builder.CreateInsertValue(cplx, i, 1, "")
return cplx, nil
case token.QUO:
// Complex division.
// Do this in a library call because it's too difficult to do
// inline.
switch r1.Type().TypeKind() {
case llvm.FloatTypeKind:
return c.createRuntimeCall("complex64div", []llvm.Value{x, y}, ""), nil
case llvm.DoubleTypeKind:
return c.createRuntimeCall("complex128div", []llvm.Value{x, y}, ""), nil
default:
panic("unexpected complex type")
}
default:
return llvm.Value{}, c.makeError(pos, "todo: binop on complex number: "+op.String())
panic("binop on complex: " + op.String())
}
} else if typ.Info()&types.IsBoolean != 0 {
// Operations on booleans