cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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test_r5900_madd.c (1731B)

      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}