61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
package asmc
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import (
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"git.urbach.dev/cli/q/src/asm"
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"git.urbach.dev/cli/q/src/x86"
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)
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func (c *compiler) move(x asm.Instruction) {
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switch x.Type {
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case asm.TypeRegisterNumber:
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operands := c.assembler.Param.RegisterNumber[x.Index]
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c.code = x86.MoveRegisterNumber(c.code, operands.Register, operands.Number)
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case asm.TypeRegisterRegister:
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operands := c.assembler.Param.RegisterRegister[x.Index]
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c.code = x86.MoveRegisterRegister(c.code, operands.Destination, operands.Source)
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case asm.TypeRegisterLabel:
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operands := c.assembler.Param.RegisterLabel[x.Index]
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start := Address(len(c.code))
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c.code = x86.LoadAddress(c.code, operands.Register, 0x00_00_00_00)
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end := Address(len(c.code))
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position := end - 4
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opSize := position - start
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if operands.Label.Type == asm.DataLabel {
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c.dataPointers = append(c.dataPointers, &pointer{
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Position: position,
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OpSize: uint8(opSize),
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Size: uint8(4),
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Resolve: func() Address {
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destination, exists := c.dataLabels[operands.Label.Name]
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if !exists {
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panic("unknown label")
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}
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destination += c.dataStart - c.codeStart
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distance := destination - end
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return distance + 8
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},
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})
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} else {
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c.codePointers = append(c.codePointers, &pointer{
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Position: position,
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OpSize: uint8(opSize),
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Size: uint8(4),
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Resolve: func() Address {
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destination, exists := c.codeLabels[operands.Label.Name]
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if !exists {
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panic("unknown label")
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}
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return destination - end
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},
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})
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}
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}
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}
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