Added more tests
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31
src/build/arch/x64/Jump_test.go
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31
src/build/arch/x64/Jump_test.go
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@ -0,0 +1,31 @@
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package x64_test
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import (
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"testing"
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"git.akyoto.dev/cli/q/src/build/arch/x64"
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"git.akyoto.dev/go/assert"
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)
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func TestJump8(t *testing.T) {
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usagePatterns := []struct {
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Offset int8
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Code []byte
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}{
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{0, []byte{0xEB, 0x00}},
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{1, []byte{0xEB, 0x01}},
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{2, []byte{0xEB, 0x02}},
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{3, []byte{0xEB, 0x03}},
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{127, []byte{0xEB, 0x7F}},
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{-1, []byte{0xEB, 0xFF}},
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{-2, []byte{0xEB, 0xFE}},
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{-3, []byte{0xEB, 0xFD}},
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{-128, []byte{0xEB, 0x80}},
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}
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for _, pattern := range usagePatterns {
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t.Logf("jmp %x", pattern.Offset)
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code := x64.Jump8(nil, pattern.Offset)
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assert.DeepEqual(t, code, pattern.Code)
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}
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}
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@ -2,8 +2,8 @@ package x64
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import "math"
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// sizeOf tells you how many bytes are needed to encode this number.
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func sizeOf(number int) int {
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// SizeOf tells you how many bytes are needed to encode this number.
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func SizeOf(number int) int {
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switch {
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case number >= math.MinInt8 && number <= math.MaxInt8:
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return 1
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21
src/build/arch/x64/SizeOf_test.go
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21
src/build/arch/x64/SizeOf_test.go
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@ -0,0 +1,21 @@
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package x64_test
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import (
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"math"
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"testing"
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"git.akyoto.dev/cli/q/src/build/arch/x64"
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"git.akyoto.dev/go/assert"
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)
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func TestSizeOf(t *testing.T) {
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assert.Equal(t, x64.SizeOf(0), 1)
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assert.Equal(t, x64.SizeOf(math.MinInt8), 1)
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assert.Equal(t, x64.SizeOf(math.MaxInt8), 1)
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assert.Equal(t, x64.SizeOf(math.MinInt16), 2)
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assert.Equal(t, x64.SizeOf(math.MaxInt16), 2)
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assert.Equal(t, x64.SizeOf(math.MinInt32), 4)
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assert.Equal(t, x64.SizeOf(math.MaxInt32), 4)
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assert.Equal(t, x64.SizeOf(math.MinInt64), 8)
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assert.Equal(t, x64.SizeOf(math.MaxInt64), 8)
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}
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@ -4,7 +4,7 @@ import "encoding/binary"
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// regRegNum encodes an instruction with up to two registers and a number parameter.
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func regRegNum(code []byte, reg byte, rm byte, number int, opCode8 byte, opCode32 byte) []byte {
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if sizeOf(number) == 1 {
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if SizeOf(number) == 1 {
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code = regReg(code, reg, rm, opCode8)
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return append(code, byte(number))
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}
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@ -8,9 +8,10 @@ import (
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)
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func TestX64(t *testing.T) {
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assert.DeepEqual(t, x64.Call([]byte{}, 1), []byte{0xe8, 0x01, 0x00, 0x00, 0x00})
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assert.DeepEqual(t, x64.MoveRegisterNumber32([]byte{}, 0, 1), []byte{0xb8, 0x01, 0x00, 0x00, 0x00})
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assert.DeepEqual(t, x64.MoveRegisterNumber32([]byte{}, 1, 1), []byte{0xb9, 0x01, 0x00, 0x00, 0x00})
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assert.DeepEqual(t, x64.Return([]byte{}), []byte{0xc3})
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assert.DeepEqual(t, x64.Syscall([]byte{}), []byte{0x0f, 0x05})
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assert.DeepEqual(t, x64.Call(nil, 1), []byte{0xe8, 0x01, 0x00, 0x00, 0x00})
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assert.DeepEqual(t, x64.MoveRegisterNumber32(nil, 0, 1), []byte{0xb8, 0x01, 0x00, 0x00, 0x00})
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assert.DeepEqual(t, x64.MoveRegisterNumber32(nil, 1, 1), []byte{0xb9, 0x01, 0x00, 0x00, 0x00})
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assert.DeepEqual(t, x64.Return(nil), []byte{0xc3})
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assert.DeepEqual(t, x64.Syscall(nil), []byte{0x0f, 0x05})
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assert.DeepEqual(t, x64.ExtendRAXToRDX(nil), []byte{0x48, 0x99})
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}
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