23 lines
508 B
Go
23 lines
508 B
Go
package arm
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import "git.urbach.dev/cli/q/src/cpu"
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// LoadRegister loads from memory into a register.
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func LoadRegister(destination cpu.Register, base cpu.Register, offset int, length byte) uint32 {
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offset &= 0b1_1111_1111
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common := 1<<22 | uint32(offset)<<12 | uint32(base)<<5 | uint32(destination)
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switch length {
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case 1:
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return 0b00111<<27 | common
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case 2:
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return 0b01111<<27 | common
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case 4:
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return 0b10111<<27 | common
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case 8:
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return 0b11111<<27 | common
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}
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panic("invalid length")
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}
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