LXR qemu/tests/tcg/mips/user/isa/r5900/test_r5900

   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
   9int64_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
  32int64_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
  55static 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
  65static 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
  73int main()
  74{
  75    verify_madd(13, 17, 19, 336);
  76
  77    return 0;
  78}
  79