84dc071236
Test R5900 three-operand MADD1. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Fredrik Noring <noring@nocrew.org>
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
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* Test R5900-specific three-operand MADD and MADD1.
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*/
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#include <stdio.h>
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#include <inttypes.h>
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#include <assert.h>
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int64_t madd(int64_t a, int32_t rs, int32_t rt)
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{
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int32_t lo = a;
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int32_t hi = a >> 32;
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int32_t rd;
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int64_t r;
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__asm__ __volatile__ (
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" mtlo %5\n"
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" mthi %6\n"
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" madd %0, %3, %4\n"
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" mflo %1\n"
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" mfhi %2\n"
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: "=r" (rd), "=r" (lo), "=r" (hi)
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: "r" (rs), "r" (rt), "r" (lo), "r" (hi));
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r = ((int64_t)hi << 32) | (uint32_t)lo;
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assert(a + (int64_t)rs * rt == r);
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assert(rd == lo);
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return r;
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}
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int64_t madd1(int64_t a, int32_t rs, int32_t rt)
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{
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int32_t lo = a;
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int32_t hi = a >> 32;
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int32_t rd;
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int64_t r;
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__asm__ __volatile__ (
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" mtlo1 %5\n"
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" mthi1 %6\n"
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" madd1 %0, %3, %4\n"
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" mflo1 %1\n"
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" mfhi1 %2\n"
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: "=r" (rd), "=r" (lo), "=r" (hi)
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: "r" (rs), "r" (rt), "r" (lo), "r" (hi));
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r = ((int64_t)hi << 32) | (uint32_t)lo;
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assert(a + (int64_t)rs * rt == r);
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assert(rd == lo);
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return r;
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}
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static int64_t madd_variants(int64_t a, int32_t rs, int32_t rt)
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{
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int64_t rd = madd(a, rs, rt);
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int64_t rd1 = madd1(a, rs, rt);
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assert(rd == rd1);
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return rd;
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}
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static void verify_madd(int64_t a, int32_t rs, int32_t rt, int64_t expected)
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{
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assert(madd_variants(a, rs, rt) == expected);
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assert(madd_variants(a, -rs, rt) == a + a - expected);
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assert(madd_variants(a, rs, -rt) == a + a - expected);
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assert(madd_variants(a, -rs, -rt) == expected);
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}
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int main()
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{
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verify_madd(13, 17, 19, 336);
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return 0;
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}
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