x86 validator: Implement rewriting "movntps" to "movaps" on x86-32

tests/validator/rewrite_nontemporals.c

 /*
  * Copyright 2016 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <string.h>
 
 #include "native_client/src/include/nacl_assert.h"
 
@@ skipping 28 matching lines @@
 
   /* This compiles to prefetchnta on x86. */
   __builtin_prefetch(&g_dest, /* rw= */ 0, /* locality= */ 0);
 
   /* Test movntq. */
   reset_test_vars();
   asm("movq g_src" MEM_SUFFIX ", %%mm0\n"
       "movntq %%mm0, g_dest" MEM_SUFFIX "\n" : : : "mm0");
   ASSERT_EQ(memcmp(g_dest, g_src, 8), 0);
 
-#if defined(__x86_64__)
   /* Test movntps. */
   reset_test_vars();
-  asm("movdqa g_src(%%r15), %%xmm0\n"
-      "movntps %%xmm0, g_dest(%%r15)\n" : : : "xmm0");
+  asm("movdqa g_src" MEM_SUFFIX ", %%xmm0\n"
+      "movntps %%xmm0, g_dest" MEM_SUFFIX "\n" : : : "xmm0");
   ASSERT_EQ(memcmp(g_dest, g_src, 16), 0);
 
+#if defined(__x86_64__)
   /* Test movnti, using 32-bit operand. */
   reset_test_vars();
   asm("mov g_src(%%r15), %%eax\n"
       "movnti %%eax, g_dest(%%r15)\n" : : : "eax");
   ASSERT_EQ(memcmp(g_dest, g_src, 4), 0);
 
   /* Test movnti, using 64-bit operand. */
   reset_test_vars();
   asm("mov g_src(%%r15), %%rax\n"
       "movnti %%rax, g_dest(%%r15)\n" : : : "rax");
@@ skipping 15 matching lines @@
   asm("mov g_src(%%r15), %%rax\n"
       "movnti %%rax, g_dest(%%rip)\n" : : : "rax");
   ASSERT_EQ(memcmp(g_dest, g_src, 8), 0);
 
   /* Test prefetchnta using RIP-relative addressing. */
   asm("prefetchnta g_dest(%rip)\n");
 #endif
 
   return 0;
 }