none/tests/amd64/movbe.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <assert.h>
   5 #include "tests/malloc.h"
   6
   7 typedef  unsigned char           UChar;
   8 typedef  unsigned int            UInt;
   9 typedef  unsigned long int       UWord;
  10 typedef  unsigned long long int  ULong;
  11
  12
  13 typedef  struct { UChar cs[40]; }  Block;
  14
  15 void showBlock ( char* msg, Block* b )
  16 {
  17    int i;
  18    printf("  %s ", msg);
  19    for (i = 0; i < 40; i++)
  20       printf("%02x", (UInt)b->cs[i]);
  21    printf("\n");
  22 }
  23
  24 UChar randUChar ( void )
  25 {
  26    static UInt seed = 80021;
  27    seed = 1103515245 * seed + 12345;
  28    return (seed >> 17) & 0xFF;
  29 }
  30
  31 void randBlock ( Block* b )
  32 {
  33    int i;
  34    UChar* p = (UChar*)b;
  35    for (i = 0; i < sizeof(Block); i++)
  36       p[i] = randUChar();
  37 }
  38
  39 /* Generate a function test_NAME, that tests the given insn.
  40    The insn may only mention (%rax) and r9. */
  41
  42 #define GEN_test_Monly(_name, _mem_form)   \
  43     \
  44     __attribute__ ((noinline)) static void test_##_name ( void )   \
  45     { \
  46        Block* b = memalign32(sizeof(Block)); \
  47        randBlock(b); \
  48        printf("%s\n", #_name); \
  49        showBlock("before", b); \
  50        __asm__ __volatile__( \
  51           "leaq      16(%0),%%rax"  "\n\t" \
  52           "movq      24(%0),%%r9"   "\n\t" \
  53           _mem_form  "\n\t" \
  54           "movq      %%r9, 32(%0)"  "\n\t" \
  55           : /*OUT*/  \
  56           : /*IN*/"r"(b) \
  57           : /*TRASH*/"r9","rax","memory","cc" \
  58        ); \
  59        showBlock("after ", b); \
  60        printf("\n"); \
  61        free(b); \
  62     }
  63
  64 GEN_test_Monly( MOVBE_RtoM_64, "movbe %%r9, 1(%%rax)")
  65 GEN_test_Monly( MOVBE_RtoM_32, "movbe %%r9d,1(%%rax)")
  66 GEN_test_Monly( MOVBE_RtoM_16, "movbe %%r9w,1(%%rax)")
  67
  68 GEN_test_Monly( MOVBE_MtoR_64, "movbe 1(%%rax), %%r9")
  69 GEN_test_Monly( MOVBE_MtoR_32, "movbe 1(%%rax), %%r9d")
  70 GEN_test_Monly( MOVBE_MtoR_16, "movbe 1(%%rax), %%r9w")
  71
  72 int main ( void )
  73 {
  74    test_MOVBE_RtoM_64();
  75    test_MOVBE_RtoM_32();
  76    test_MOVBE_RtoM_16();
  77    test_MOVBE_MtoR_64();
  78    test_MOVBE_MtoR_32();
  79    test_MOVBE_MtoR_16();
  80    return 0;
  81 }