Implemented if statements
This commit is contained in:
13
src/build/arch/x64/Compare.go
Normal file
13
src/build/arch/x64/Compare.go
Normal file
@ -0,0 +1,13 @@
|
||||
package x64
|
||||
|
||||
import "git.akyoto.dev/cli/q/src/build/cpu"
|
||||
|
||||
// Compares the register with the number and sets the status flags in the EFLAGS register.
|
||||
func CompareRegisterNumber(code []byte, register cpu.Register, number int) []byte {
|
||||
return regRegNum(code, 0b111, byte(register), number, 0x83, 0x81)
|
||||
}
|
||||
|
||||
// CompareRegisterRegister compares a register with a register and sets the status flags in the EFLAGS register.
|
||||
func CompareRegisterRegister(code []byte, registerA cpu.Register, registerB cpu.Register) []byte {
|
||||
return regReg(code, byte(registerB), byte(registerA), 0x39)
|
||||
}
|
||||
88
src/build/arch/x64/Compare_test.go
Normal file
88
src/build/arch/x64/Compare_test.go
Normal file
@ -0,0 +1,88 @@
|
||||
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 TestCompareRegisterNumber(t *testing.T) {
|
||||
usagePatterns := []struct {
|
||||
Register cpu.Register
|
||||
Number int
|
||||
Code []byte
|
||||
}{
|
||||
{x64.RAX, 1, []byte{0x48, 0x83, 0xF8, 0x01}},
|
||||
{x64.RCX, 1, []byte{0x48, 0x83, 0xF9, 0x01}},
|
||||
{x64.RDX, 1, []byte{0x48, 0x83, 0xFA, 0x01}},
|
||||
{x64.RBX, 1, []byte{0x48, 0x83, 0xFB, 0x01}},
|
||||
{x64.RSP, 1, []byte{0x48, 0x83, 0xFC, 0x01}},
|
||||
{x64.RBP, 1, []byte{0x48, 0x83, 0xFD, 0x01}},
|
||||
{x64.RSI, 1, []byte{0x48, 0x83, 0xFE, 0x01}},
|
||||
{x64.RDI, 1, []byte{0x48, 0x83, 0xFF, 0x01}},
|
||||
{x64.R8, 1, []byte{0x49, 0x83, 0xF8, 0x01}},
|
||||
{x64.R9, 1, []byte{0x49, 0x83, 0xF9, 0x01}},
|
||||
{x64.R10, 1, []byte{0x49, 0x83, 0xFA, 0x01}},
|
||||
{x64.R11, 1, []byte{0x49, 0x83, 0xFB, 0x01}},
|
||||
{x64.R12, 1, []byte{0x49, 0x83, 0xFC, 0x01}},
|
||||
{x64.R13, 1, []byte{0x49, 0x83, 0xFD, 0x01}},
|
||||
{x64.R14, 1, []byte{0x49, 0x83, 0xFE, 0x01}},
|
||||
{x64.R15, 1, []byte{0x49, 0x83, 0xFF, 0x01}},
|
||||
|
||||
{x64.RAX, 0x7FFFFFFF, []byte{0x48, 0x81, 0xF8, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RCX, 0x7FFFFFFF, []byte{0x48, 0x81, 0xF9, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RDX, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFA, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RBX, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFB, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RSP, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFC, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RBP, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFD, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RSI, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.RDI, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R8, 0x7FFFFFFF, []byte{0x49, 0x81, 0xF8, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R9, 0x7FFFFFFF, []byte{0x49, 0x81, 0xF9, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R10, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFA, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R11, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFB, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R12, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFC, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R13, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFD, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R14, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
{x64.R15, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F}},
|
||||
}
|
||||
|
||||
for _, pattern := range usagePatterns {
|
||||
t.Logf("cmp %s, %x", pattern.Register, pattern.Number)
|
||||
code := x64.CompareRegisterNumber(nil, pattern.Register, pattern.Number)
|
||||
assert.DeepEqual(t, code, pattern.Code)
|
||||
}
|
||||
}
|
||||
|
||||
func TestCompareRegisterRegister(t *testing.T) {
|
||||
usagePatterns := []struct {
|
||||
Left cpu.Register
|
||||
Right cpu.Register
|
||||
Code []byte
|
||||
}{
|
||||
{x64.RAX, x64.R15, []byte{0x4C, 0x39, 0xF8}},
|
||||
{x64.RCX, x64.R14, []byte{0x4C, 0x39, 0xF1}},
|
||||
{x64.RDX, x64.R13, []byte{0x4C, 0x39, 0xEA}},
|
||||
{x64.RBX, x64.R12, []byte{0x4C, 0x39, 0xE3}},
|
||||
{x64.RSP, x64.R11, []byte{0x4C, 0x39, 0xDC}},
|
||||
{x64.RBP, x64.R10, []byte{0x4C, 0x39, 0xD5}},
|
||||
{x64.RSI, x64.R9, []byte{0x4C, 0x39, 0xCE}},
|
||||
{x64.RDI, x64.R8, []byte{0x4C, 0x39, 0xC7}},
|
||||
{x64.R8, x64.RDI, []byte{0x49, 0x39, 0xF8}},
|
||||
{x64.R9, x64.RSI, []byte{0x49, 0x39, 0xF1}},
|
||||
{x64.R10, x64.RBP, []byte{0x49, 0x39, 0xEA}},
|
||||
{x64.R11, x64.RSP, []byte{0x49, 0x39, 0xE3}},
|
||||
{x64.R12, x64.RBX, []byte{0x49, 0x39, 0xDC}},
|
||||
{x64.R13, x64.RDX, []byte{0x49, 0x39, 0xD5}},
|
||||
{x64.R14, x64.RCX, []byte{0x49, 0x39, 0xCE}},
|
||||
{x64.R15, x64.RAX, []byte{0x49, 0x39, 0xC7}},
|
||||
}
|
||||
|
||||
for _, pattern := range usagePatterns {
|
||||
t.Logf("cmp %s, %s", pattern.Left, pattern.Right)
|
||||
code := x64.CompareRegisterRegister(nil, pattern.Left, pattern.Right)
|
||||
assert.DeepEqual(t, code, pattern.Code)
|
||||
}
|
||||
}
|
||||
@ -3,9 +3,43 @@ package x64
|
||||
// Jump continues program flow at the new address.
|
||||
// The address is relative to the next instruction.
|
||||
func Jump8(code []byte, address int8) []byte {
|
||||
return jump8(code, 0xEB, address)
|
||||
}
|
||||
|
||||
// JumpIfLess jumps if the result was less.
|
||||
func Jump8IfLess(code []byte, address int8) []byte {
|
||||
return jump8(code, 0x7C, address)
|
||||
}
|
||||
|
||||
// JumpIfLessOrEqual jumps if the result was less or equal.
|
||||
func Jump8IfLessOrEqual(code []byte, address int8) []byte {
|
||||
return jump8(code, 0x7E, address)
|
||||
}
|
||||
|
||||
// JumpIfGreater jumps if the result was greater.
|
||||
func Jump8IfGreater(code []byte, address int8) []byte {
|
||||
return jump8(code, 0x7F, address)
|
||||
}
|
||||
|
||||
// JumpIfGreaterOrEqual jumps if the result was greater or equal.
|
||||
func Jump8IfGreaterOrEqual(code []byte, address int8) []byte {
|
||||
return jump8(code, 0x7D, address)
|
||||
}
|
||||
|
||||
// JumpIfEqual jumps if the result was equal.
|
||||
func Jump8IfEqual(code []byte, address int8) []byte {
|
||||
return jump8(code, 0x74, address)
|
||||
}
|
||||
|
||||
// JumpIfNotEqual jumps if the result was not equal.
|
||||
func Jump8IfNotEqual(code []byte, address int8) []byte {
|
||||
return jump8(code, 0x75, address)
|
||||
}
|
||||
|
||||
func jump8(code []byte, opCode byte, address int8) []byte {
|
||||
return append(
|
||||
code,
|
||||
0xEB,
|
||||
opCode,
|
||||
byte(address),
|
||||
)
|
||||
}
|
||||
|
||||
@ -22,8 +22,8 @@ const (
|
||||
)
|
||||
|
||||
var (
|
||||
CallRegisters = SyscallRegisters
|
||||
GeneralRegisters = []cpu.Register{RCX, RBX, RBP, R11, R12, R13, R14, R15}
|
||||
SyscallRegisters = []cpu.Register{RAX, RDI, RSI, RDX, R10, R8, R9}
|
||||
ReturnValueRegisters = []cpu.Register{RAX, RCX, R11}
|
||||
GeneralRegisters = []cpu.Register{RCX, RBX, RBP, R11, R12, R13, R14, R15}
|
||||
CallRegisters = SyscallRegisters
|
||||
ReturnValueRegisters = SyscallRegisters
|
||||
)
|
||||
|
||||
Reference in New Issue
Block a user