cli/q
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Fixed move instruction encoding on arm64

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This commit is contained in:
Eduard Urbach
2025-03-15 00:01:58 +01:00
parent 99ef02bbd6
commit dd98b233e1
2 changed files with 8 additions and 7 deletions
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2
src/arm/Move.go
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@ -16,11 +16,11 @@ func MoveRegisterRegister(destination cpu.Register, source cpu.Register) uint32
// MoveRegisterNumber moves a number into the given register.
func MoveRegisterNumber(destination cpu.Register, number int) (uint32, bool) {
if sizeof.Signed(number) <= 2 {
if number < 0 {
return MoveInvertedWideImmediate(destination, ^number, 0), true
}
if sizeof.Signed(number) <= 2 {
return MoveZero(destination, 0, uint16(number)), true
}

7
src/arm/Move_test.go
View File

@ -30,7 +30,7 @@ func TestMoveRegisterRegister(t *testing.T) {
func TestMoveRegisterNumber(t *testing.T) {
usagePatterns := []struct {
Register cpu.Register
Number int
Number uint64
Code uint32
}{
// MOVZ
@ -41,9 +41,10 @@ func TestMoveRegisterNumber(t *testing.T) {
{arm.X0, 0x1FFFF, 0xB24043E0},
{arm.X0, 0x7FFFFFFF, 0xB2407BE0},
{arm.X0, 0xFFFFFFFF, 0xB2407FE0},
{arm.X0, 0xC3FFFFFFC3FFFFFF, 0xB2026FE0},
// MOV (inverted wide immediate)
{arm.X0, -1, 0x92800000},
{arm.X0, 0xFFFFFFFFFFFFFFFF, 0x92800000},
{arm.X0, 0x7FFFFFFFFFFFFFFF, 0x92F00000},
{arm.X0, 0x2FFFFFFFF, 0x92DFFFA0}, // not encodable in the GNU assembler
{arm.X0, 0x2FFFF, 0x92BFFFA0}, // not encodable in the GNU assembler
@ -55,7 +56,7 @@ func TestMoveRegisterNumber(t *testing.T) {
for _, pattern := range usagePatterns {
t.Logf("mov %s, %d", pattern.Register, pattern.Number)
code, encodable := arm.MoveRegisterNumber(pattern.Register, pattern.Number)
code, encodable := arm.MoveRegisterNumber(pattern.Register, int(pattern.Number))
if pattern.Code != 0 {
assert.True(t, encodable)