Added x86 package

src/x86/Pop_test.go

@@ -0,0 +1,39 @@
+package x86_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/cpu"
+	"git.urbach.dev/cli/q/src/x86"
+	"git.urbach.dev/go/assert"
+)
+
+func TestPopRegister(t *testing.T) {
+	usagePatterns := []struct {
+		Register cpu.Register
+		Code     []byte
+	}{
+		{x86.R0, []byte{0x58}},
+		{x86.R1, []byte{0x59}},
+		{x86.R2, []byte{0x5A}},
+		{x86.R3, []byte{0x5B}},
+		{x86.SP, []byte{0x5C}},
+		{x86.R5, []byte{0x5D}},
+		{x86.R6, []byte{0x5E}},
+		{x86.R7, []byte{0x5F}},
+		{x86.R8, []byte{0x41, 0x58}},
+		{x86.R9, []byte{0x41, 0x59}},
+		{x86.R10, []byte{0x41, 0x5A}},
+		{x86.R11, []byte{0x41, 0x5B}},
+		{x86.R12, []byte{0x41, 0x5C}},
+		{x86.R13, []byte{0x41, 0x5D}},
+		{x86.R14, []byte{0x41, 0x5E}},
+		{x86.R15, []byte{0x41, 0x5F}},
+	}
+
+	for _, pattern := range usagePatterns {
+		t.Logf("pop %s", pattern.Register)
+		code := x86.PopRegister(nil, pattern.Register)
+		assert.DeepEqual(t, code, pattern.Code)
+	}
+}