cli/q
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Added more tests

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This commit is contained in:
Eduard Urbach 2024-06-26 12:55:22 +02:00
parent e69d695f6b
commit e23c1ece80
Signed by: akyoto
GPG Key ID: C874F672B1AF20C0
5 changed files with 116 additions and 38 deletions
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2
src/build/arch/x64/Jump.go
View File

@ -5,7 +5,7 @@ package x64
func Jump8(code []byte, address int8) []byte {
return append(
code,
0xeb,
0xEB,
byte(address),
)
}

40
src/build/arch/x64/Move.go
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@ -1,43 +1,23 @@
package x64
import "git.akyoto.dev/cli/q/src/build/cpu"
import (
"encoding/binary"
"git.akyoto.dev/cli/q/src/build/cpu"
)
// MoveRegisterNumber32 moves a 32 bit integer into the given register.
func MoveRegisterNumber32(code []byte, destination cpu.Register, number uint32) []byte {
if destination >= 8 {
if destination > 0b111 {
code = append(code, REX(0, 0, 0, 1))
destination -= 8
destination &= 0b111
}
return append(
code,
0xb8+byte(destination),
byte(number),
byte(number>>8),
byte(number>>16),
byte(number>>24),
)
code = append(code, 0xb8+byte(destination))
return binary.LittleEndian.AppendUint32(code, number)
}
// MoveRegisterRegister64 moves a register value into another register.
func MoveRegisterRegister64(code []byte, destination cpu.Register, source cpu.Register) []byte {
r := byte(0) // Extension to the "reg" field in ModRM.
b := byte(0) // Extension to the "rm" field in ModRM or the SIB base (r8 up to r15 use this).
if source >= 8 {
r = 1
source -= 8
}
if destination >= 8 {
b = 1
destination -= 8
}
return append(
code,
REX(1, r, 0, b),
0x89,
ModRM(0b11, byte(source), byte(destination)),
)
return regReg(code, byte(source), byte(destination), 0x89)
}

71
src/build/arch/x64/Move_test.go Normal file
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@ -0,0 +1,71 @@
package x64_test
import (
"testing"
"git.akyoto.dev/cli/q/src/build/arch/x64"
"git.akyoto.dev/cli/q/src/build/cpu"
"git.akyoto.dev/go/assert"
)
func TestMoveRegisterNumber(t *testing.T) {
usagePatterns := []struct {
Register cpu.Register
Number int
Code []byte
}{
{x64.RAX, 0x7FFFFFFF, []byte{0xB8, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RCX, 0x7FFFFFFF, []byte{0xB9, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RDX, 0x7FFFFFFF, []byte{0xBA, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RBX, 0x7FFFFFFF, []byte{0xBB, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RSP, 0x7FFFFFFF, []byte{0xBC, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RBP, 0x7FFFFFFF, []byte{0xBD, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RSI, 0x7FFFFFFF, []byte{0xBE, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.RDI, 0x7FFFFFFF, []byte{0xBF, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R8, 0x7FFFFFFF, []byte{0x41, 0xB8, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R9, 0x7FFFFFFF, []byte{0x41, 0xB9, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R10, 0x7FFFFFFF, []byte{0x41, 0xBA, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R11, 0x7FFFFFFF, []byte{0x41, 0xBB, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R12, 0x7FFFFFFF, []byte{0x41, 0xBC, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R13, 0x7FFFFFFF, []byte{0x41, 0xBD, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R14, 0x7FFFFFFF, []byte{0x41, 0xBE, 0xFF, 0xFF, 0xFF, 0x7F}},
{x64.R15, 0x7FFFFFFF, []byte{0x41, 0xBF, 0xFF, 0xFF, 0xFF, 0x7F}},
}
for _, pattern := range usagePatterns {
t.Logf("mov %s, %x", pattern.Register, pattern.Number)
code := x64.MoveRegisterNumber32(nil, pattern.Register, uint32(pattern.Number))
assert.DeepEqual(t, code, pattern.Code)
}
}
func TestMoveRegisterRegister(t *testing.T) {
usagePatterns := []struct {
Left cpu.Register
Right cpu.Register
Code []byte
}{
{x64.RAX, x64.R15, []byte{0x4C, 0x89, 0xF8}},
{x64.RCX, x64.R14, []byte{0x4C, 0x89, 0xF1}},
{x64.RDX, x64.R13, []byte{0x4C, 0x89, 0xEA}},
{x64.RBX, x64.R12, []byte{0x4C, 0x89, 0xE3}},
{x64.RSP, x64.R11, []byte{0x4C, 0x89, 0xDC}},
{x64.RBP, x64.R10, []byte{0x4C, 0x89, 0xD5}},
{x64.RSI, x64.R9, []byte{0x4C, 0x89, 0xCE}},
{x64.RDI, x64.R8, []byte{0x4C, 0x89, 0xC7}},
{x64.R8, x64.RDI, []byte{0x49, 0x89, 0xF8}},
{x64.R9, x64.RSI, []byte{0x49, 0x89, 0xF1}},
{x64.R10, x64.RBP, []byte{0x49, 0x89, 0xEA}},
{x64.R11, x64.RSP, []byte{0x49, 0x89, 0xE3}},
{x64.R12, x64.RBX, []byte{0x49, 0x89, 0xDC}},
{x64.R13, x64.RDX, []byte{0x49, 0x89, 0xD5}},
{x64.R14, x64.RCX, []byte{0x49, 0x89, 0xCE}},
{x64.R15, x64.RAX, []byte{0x49, 0x89, 0xC7}},
}
for _, pattern := range usagePatterns {
t.Logf("mov %s, %s", pattern.Left, pattern.Right)
code := x64.MoveRegisterRegister64(nil, pattern.Left, pattern.Right)
assert.DeepEqual(t, code, pattern.Code)
}
}

31
src/build/arch/x64/Sub_test.go
View File

@ -55,3 +55,34 @@ func TestSubRegisterNumber(t *testing.T) {
assert.DeepEqual(t, code, pattern.Code)
}
}
func TestSubRegisterRegister(t *testing.T) {
usagePatterns := []struct {
Left cpu.Register
Right cpu.Register
Code []byte
}{
{x64.RAX, x64.R15, []byte{0x4C, 0x29, 0xF8}},
{x64.RCX, x64.R14, []byte{0x4C, 0x29, 0xF1}},
{x64.RDX, x64.R13, []byte{0x4C, 0x29, 0xEA}},
{x64.RBX, x64.R12, []byte{0x4C, 0x29, 0xE3}},
{x64.RSP, x64.R11, []byte{0x4C, 0x29, 0xDC}},
{x64.RBP, x64.R10, []byte{0x4C, 0x29, 0xD5}},
{x64.RSI, x64.R9, []byte{0x4C, 0x29, 0xCE}},
{x64.RDI, x64.R8, []byte{0x4C, 0x29, 0xC7}},
{x64.R8, x64.RDI, []byte{0x49, 0x29, 0xF8}},
{x64.R9, x64.RSI, []byte{0x49, 0x29, 0xF1}},
{x64.R10, x64.RBP, []byte{0x49, 0x29, 0xEA}},
{x64.R11, x64.RSP, []byte{0x49, 0x29, 0xE3}},
{x64.R12, x64.RBX, []byte{0x49, 0x29, 0xDC}},
{x64.R13, x64.RDX, []byte{0x49, 0x29, 0xD5}},
{x64.R14, x64.RCX, []byte{0x49, 0x29, 0xCE}},
{x64.R15, x64.RAX, []byte{0x49, 0x29, 0xC7}},
}
for _, pattern := range usagePatterns {
t.Logf("sub %s, %s", pattern.Left, pattern.Right)
code := x64.SubRegisterRegister(nil, pattern.Left, pattern.Right)
assert.DeepEqual(t, code, pattern.Code)
}
}

10
src/build/arch/x64/regRegNum.go
View File

@ -1,5 +1,7 @@
package x64
import "encoding/binary"
// regRegNum encodes an instruction with up to two registers and a number parameter.
func regRegNum(code []byte, reg byte, rm byte, number int, opCode8 byte, opCode32 byte) []byte {
if sizeOf(number) == 1 {
@ -8,11 +10,5 @@ func regRegNum(code []byte, reg byte, rm byte, number int, opCode8 byte, opCode3
}
code = regReg(code, reg, rm, opCode32)
return append(
code,
byte(number),
byte(number>>8),
byte(number>>16),
byte(number>>24),
)
return binary.LittleEndian.AppendUint32(code, uint32(number))
}