cli/q
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Improved branch code generation

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This commit is contained in:
Eduard Urbach 2024-07-07 15:20:21 +02:00
parent 403e78f655
commit 23b4e6442d
Signed by: akyoto
GPG Key ID: C874F672B1AF20C0
3 changed files with 19 additions and 15 deletions
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28
src/build/core/CompileIf.go
View File

@ -10,41 +10,39 @@ import (
// CompileIf compiles a branch instruction.
func (f *Function) CompileIf(branch *ast.If) error {
condition := branch.Condition
tmpRight := f.cpu.MustFindFree(f.cpu.General)
err := f.ExpressionToRegister(condition.Children[1], tmpRight)
tmp := f.cpu.MustFindFree(f.cpu.General)
err := f.ExpressionToRegister(condition.Children[0], tmp)
if err != nil {
return err
}
f.cpu.Use(tmpRight)
tmpLeft := f.cpu.Input[0]
err = f.ExpressionToRegister(condition.Children[0], tmpLeft)
f.cpu.Use(tmp)
err = f.Execute(condition.Token, tmp, condition.Children[1])
if err != nil {
return err
}
f.assembler.RegisterRegister(asm.COMPARE, tmpLeft, tmpRight)
f.cpu.Free(tmpRight)
elseLabel := fmt.Sprintf("%s_if_%d_else", f.Name, f.count.branch)
f.cpu.Free(tmp)
endLabel := fmt.Sprintf("%s_end_if_%d", f.Name, f.count.branch)
switch condition.Token.Text() {
case "==":
f.assembler.Label(asm.JNE, elseLabel)
f.assembler.Label(asm.JNE, endLabel)
case "!=":
f.assembler.Label(asm.JE, elseLabel)
f.assembler.Label(asm.JE, endLabel)
case ">":
f.assembler.Label(asm.JLE, elseLabel)
f.assembler.Label(asm.JLE, endLabel)
case "<":
f.assembler.Label(asm.JGE, elseLabel)
f.assembler.Label(asm.JGE, endLabel)
case ">=":
f.assembler.Label(asm.JL, elseLabel)
f.assembler.Label(asm.JL, endLabel)
case "<=":
f.assembler.Label(asm.JG, elseLabel)
f.assembler.Label(asm.JG, endLabel)
}
defer f.assembler.Label(asm.LABEL, elseLabel)
defer f.assembler.Label(asm.LABEL, endLabel)
f.count.branch++
return f.CompileAST(branch.Body)
}

3
src/build/core/ExecuteRegisterNumber.go
View File

@ -22,6 +22,9 @@ func (f *Function) ExecuteRegisterNumber(operation token.Token, register cpu.Reg
case "/", "/=":
f.assembler.RegisterNumber(asm.DIV, register, number)
case "==", "!=", "<", "<=", ">", ">=":
f.assembler.RegisterNumber(asm.COMPARE, register, number)
case "=":
f.assembler.RegisterNumber(asm.MOVE, register, number)

3
src/build/core/ExecuteRegisterRegister.go
View File

@ -22,6 +22,9 @@ func (f *Function) ExecuteRegisterRegister(operation token.Token, destination cp
case "/", "/=":
f.assembler.RegisterRegister(asm.DIV, destination, source)
case "==", "!=", "<", "<=", ">", ">=":
f.assembler.RegisterRegister(asm.COMPARE, destination, source)
case "=":
if destination != source {
f.assembler.RegisterRegister(asm.MOVE, destination, source)