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🌱 A minimal programming language and compiler. git.urbach.dev/cli/q
high-performance programming-language compiler
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import ( "testing"
"git.urbach.dev/cli/q/src/cpu" "git.urbach.dev/cli/q/src/x86" "git.urbach.dev/go/assert")
func TestCompareRegisterNumber(t *testing.T) { usagePatterns := []struct { Register cpu.Register Number int Code []byte }{ {x86.R0, 1, []byte{0x48, 0x83, 0xF8, 0x01}}, {x86.R1, 1, []byte{0x48, 0x83, 0xF9, 0x01}}, {x86.R2, 1, []byte{0x48, 0x83, 0xFA, 0x01}}, {x86.R3, 1, []byte{0x48, 0x83, 0xFB, 0x01}}, {x86.SP, 1, []byte{0x48, 0x83, 0xFC, 0x01}}, {x86.R5, 1, []byte{0x48, 0x83, 0xFD, 0x01}}, {x86.R6, 1, []byte{0x48, 0x83, 0xFE, 0x01}}, {x86.R7, 1, []byte{0x48, 0x83, 0xFF, 0x01}}, {x86.R8, 1, []byte{0x49, 0x83, 0xF8, 0x01}}, {x86.R9, 1, []byte{0x49, 0x83, 0xF9, 0x01}}, {x86.R10, 1, []byte{0x49, 0x83, 0xFA, 0x01}}, {x86.R11, 1, []byte{0x49, 0x83, 0xFB, 0x01}}, {x86.R12, 1, []byte{0x49, 0x83, 0xFC, 0x01}}, {x86.R13, 1, []byte{0x49, 0x83, 0xFD, 0x01}}, {x86.R14, 1, []byte{0x49, 0x83, 0xFE, 0x01}}, {x86.R15, 1, []byte{0x49, 0x83, 0xFF, 0x01}},
{x86.R0, 0x7FFFFFFF, []byte{0x48, 0x81, 0xF8, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R1, 0x7FFFFFFF, []byte{0x48, 0x81, 0xF9, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R2, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFA, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R3, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFB, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.SP, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFC, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R5, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFD, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R6, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R7, 0x7FFFFFFF, []byte{0x48, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R8, 0x7FFFFFFF, []byte{0x49, 0x81, 0xF8, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R9, 0x7FFFFFFF, []byte{0x49, 0x81, 0xF9, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R10, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFA, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R11, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFB, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R12, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFC, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R13, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFD, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R14, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F}}, {x86.R15, 0x7FFFFFFF, []byte{0x49, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F}}, }
for _, pattern := range usagePatterns { t.Logf("cmp %s, %x", pattern.Register, pattern.Number) code := x86.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 Length byte Code []byte }{ // 8-bit {x86.R0, x86.R1, 1, []byte{0x38, 0xC8}}, {x86.R2, x86.R3, 1, []byte{0x38, 0xDA}}, {x86.R6, x86.R7, 1, []byte{0x40, 0x38, 0xFE}}, {x86.SP, x86.R5, 1, []byte{0x40, 0x38, 0xEC}}, {x86.R0, x86.SP, 1, []byte{0x40, 0x38, 0xE0}}, {x86.R2, x86.SP, 1, []byte{0x40, 0x38, 0xE2}}, {x86.R8, x86.R9, 1, []byte{0x45, 0x38, 0xC8}}, {x86.R15, x86.R8, 1, []byte{0x45, 0x38, 0xC7}}, {x86.R0, x86.R9, 1, []byte{0x44, 0x38, 0xC8}},
// 16-bit {x86.R0, x86.R1, 2, []byte{0x66, 0x39, 0xC8}}, {x86.R2, x86.R3, 2, []byte{0x66, 0x39, 0xDA}}, {x86.R6, x86.R7, 2, []byte{0x66, 0x39, 0xFE}}, {x86.SP, x86.R5, 2, []byte{0x66, 0x39, 0xEC}},
// 32-bit {x86.R0, x86.R1, 4, []byte{0x39, 0xC8}}, {x86.R2, x86.R3, 4, []byte{0x39, 0xDA}}, {x86.R6, x86.R7, 4, []byte{0x39, 0xFE}}, {x86.SP, x86.R5, 4, []byte{0x39, 0xEC}},
// 64-bit {x86.R0, x86.R15, 8, []byte{0x4C, 0x39, 0xF8}}, {x86.R1, x86.R14, 8, []byte{0x4C, 0x39, 0xF1}}, {x86.R2, x86.R13, 8, []byte{0x4C, 0x39, 0xEA}}, {x86.R3, x86.R12, 8, []byte{0x4C, 0x39, 0xE3}}, {x86.SP, x86.R11, 8, []byte{0x4C, 0x39, 0xDC}}, {x86.R5, x86.R10, 8, []byte{0x4C, 0x39, 0xD5}}, {x86.R6, x86.R9, 8, []byte{0x4C, 0x39, 0xCE}}, {x86.R7, x86.R8, 8, []byte{0x4C, 0x39, 0xC7}}, {x86.R8, x86.R7, 8, []byte{0x49, 0x39, 0xF8}}, {x86.R9, x86.R6, 8, []byte{0x49, 0x39, 0xF1}}, {x86.R10, x86.R5, 8, []byte{0x49, 0x39, 0xEA}}, {x86.R11, x86.SP, 8, []byte{0x49, 0x39, 0xE3}}, {x86.R12, x86.R3, 8, []byte{0x49, 0x39, 0xDC}}, {x86.R13, x86.R2, 8, []byte{0x49, 0x39, 0xD5}}, {x86.R14, x86.R1, 8, []byte{0x49, 0x39, 0xCE}}, {x86.R15, x86.R0, 8, []byte{0x49, 0x39, 0xC7}}, }
for _, pattern := range usagePatterns { t.Logf("cmp %db %s, %s", pattern.Length, pattern.Left, pattern.Right) code := x86.CompareRegisterRegister(nil, pattern.Left, pattern.Right, pattern.Length) assert.DeepEqual(t, code, pattern.Code) }}