Make improvements

- Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader

- Whipped up a webserver named redbean. It services 150k requests per
  second on a single core. Bundling assets inside zip enables extremely
  fast serving for two reasons. The first is that zip central directory
  lookups go faster than stat() system calls. The second is that both
  zip and gzip content-encoding use DEFLATE, therefore, compressed
  responses can be served via the sendfile() system call which does an
  in-kernel copy directly from the zip executable structure. Also note
  that red bean zip executables can be deployed easily to all platforms,
  since these native executables work on Linux, Mac, BSD, and Windows.

- Address sanitizer now works very well

tool/build/lib/cvt.c

@@ -26,6 +26,13 @@
 #include "tool/build/lib/modrm.h"
 #include "tool/build/lib/throw.h"
 
+#define kOpCvt0f2a  0
+#define kOpCvtt0f2c 4
+#define kOpCvt0f2d  8
+#define kOpCvt0f5a  12
+#define kOpCvt0f5b  16
+#define kOpCvt0fE6  20
+
 static double SseRoundDouble(struct Machine *m, double x) {
   switch (m->sse.rc) {
     case 0:
@@ -285,7 +292,7 @@ static void OpVdqWpdCvtpd2dq(struct Machine *m, uint32_t rde) {
   memcpy(XmmRexrReg(m, rde), n, 8);
 }
 
-void OpCvt(struct Machine *m, uint32_t rde, unsigned long op) {
+static void OpCvt(struct Machine *m, uint32_t rde, unsigned long op) {
   switch (op | Rep(rde) | Osz(rde)) {
     case kOpCvt0f2a + 0:
       OpVpsQpiCvtpi2ps(m, rde);
@@ -354,6 +361,30 @@ void OpCvt(struct Machine *m, uint32_t rde, unsigned long op) {
       OpVpdWdqCvtdq2pd(m, rde);
       break;
     default:
-      OpUd(m);
+      OpUd(m, rde);
   }
 }
+
+void OpCvt0f2a(struct Machine *m, uint32_t rde) {
+  OpCvt(m, rde, kOpCvt0f2a);
+}
+
+void OpCvtt0f2c(struct Machine *m, uint32_t rde) {
+  OpCvt(m, rde, kOpCvtt0f2c);
+}
+
+void OpCvt0f2d(struct Machine *m, uint32_t rde) {
+  OpCvt(m, rde, kOpCvt0f2d);
+}
+
+void OpCvt0f5a(struct Machine *m, uint32_t rde) {
+  OpCvt(m, rde, kOpCvt0f5a);
+}
+
+void OpCvt0f5b(struct Machine *m, uint32_t rde) {
+  OpCvt(m, rde, kOpCvt0f5b);
+}
+
+void OpCvt0fE6(struct Machine *m, uint32_t rde) {
+  OpCvt(m, rde, kOpCvt0fE6);
+}