52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package core
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import (
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"fmt"
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"strconv"
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"git.akyoto.dev/cli/q/src/build/asm"
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"git.akyoto.dev/cli/q/src/build/cpu"
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"git.akyoto.dev/cli/q/src/build/errors"
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"git.akyoto.dev/cli/q/src/build/token"
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)
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// TokenToRegister moves a token into a register.
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// It only works with identifiers, numbers and strings.
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func (f *Function) TokenToRegister(t token.Token, register cpu.Register) error {
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switch t.Kind {
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case token.Identifier:
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name := t.Text()
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variable := f.Variable(name)
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if variable == nil {
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return errors.New(&errors.UnknownIdentifier{Name: name}, f.File, t.Position)
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}
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f.useVariable(variable)
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f.RegisterRegister(asm.MOVE, register, variable.Register)
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return nil
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case token.Number:
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value := t.Text()
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n, err := strconv.Atoi(value)
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if err != nil {
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return err
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}
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f.RegisterNumber(asm.MOVE, register, n)
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return nil
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case token.String:
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f.count.data++
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label := fmt.Sprintf("%s_data_%d", f.Name, f.count.data)
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value := t.Bytes[1 : len(t.Bytes)-1]
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f.Assembler.SetData(label, value)
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f.RegisterLabel(asm.MOVE, register, label)
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return nil
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default:
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return errors.New(errors.InvalidExpression, f.File, t.Position)
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}
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}
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