tests/tcg/mips/mipsr5900/madd.c

   1 /*
   2  * Test R5900-specific three-operand MADD and MADD1.
   3  */
   4
   5 #include <stdio.h>
   6 #include <inttypes.h>
   7 #include <assert.h>
   8
   9 int64_t madd(int64_t a, int32_t rs, int32_t rt)
  10 {
  11     int32_t lo = a;
  12     int32_t hi = a >> 32;
  13     int32_t rd;
  14     int64_t r;
  15
  16     __asm__ __volatile__ (
  17             "    mtlo %5\n"
  18             "    mthi %6\n"
  19             "    madd %0, %3, %4\n"
  20             "    mflo %1\n"
  21             "    mfhi %2\n"
  22             : "=r" (rd), "=r" (lo), "=r" (hi)
  23             : "r" (rs), "r" (rt), "r" (lo), "r" (hi));
  24     r = ((int64_t)hi << 32) | (uint32_t)lo;
  25
  26     assert(a + (int64_t)rs * rt == r);
  27     assert(rd == lo);
  28
  29     return r;
  30 }
  31
  32 int64_t madd1(int64_t a, int32_t rs, int32_t rt)
  33 {
  34     int32_t lo = a;
  35     int32_t hi = a >> 32;
  36     int32_t rd;
  37     int64_t r;
  38
  39     __asm__ __volatile__ (
  40             "    mtlo1 %5\n"
  41             "    mthi1 %6\n"
  42             "    madd1 %0, %3, %4\n"
  43             "    mflo1 %1\n"
  44             "    mfhi1 %2\n"
  45             : "=r" (rd), "=r" (lo), "=r" (hi)
  46             : "r" (rs), "r" (rt), "r" (lo), "r" (hi));
  47     r = ((int64_t)hi << 32) | (uint32_t)lo;
  48
  49     assert(a + (int64_t)rs * rt == r);
  50     assert(rd == lo);
  51
  52     return r;
  53 }
  54
  55 static int64_t madd_variants(int64_t a, int32_t rs, int32_t rt)
  56 {
  57     int64_t rd  = madd(a, rs, rt);
  58     int64_t rd1 = madd1(a, rs, rt);
  59
  60     assert(rd == rd1);
  61
  62     return rd;
  63 }
  64
  65 static void verify_madd(int64_t a, int32_t rs, int32_t rt, int64_t expected)
  66 {
  67     assert(madd_variants(a, rs, rt) == expected);
  68     assert(madd_variants(a, -rs, rt) == a + a - expected);
  69     assert(madd_variants(a, rs, -rt) == a + a - expected);
  70     assert(madd_variants(a, -rs, -rt) == expected);
  71 }
  72
  73 int main()
  74 {
  75     verify_madd(13, 17, 19, 336);
  76
  77     return 0;
  78 }