diff options
Diffstat (limited to 'tests/tcg/mips/mipsr5900/mult.c')
-rw-r--r-- | tests/tcg/mips/mipsr5900/mult.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/tests/tcg/mips/mipsr5900/mult.c b/tests/tcg/mips/mipsr5900/mult.c new file mode 100644 index 0000000000..2c0c16d232 --- /dev/null +++ b/tests/tcg/mips/mipsr5900/mult.c @@ -0,0 +1,47 @@ +/* + * Test R5900-specific three-operand MULT. + */ + +#include <stdio.h> +#include <inttypes.h> +#include <assert.h> + +static int64_t mult(int32_t rs, int32_t rt) +{ + int32_t rd, lo, hi; + int64_t r; + + __asm__ __volatile__ ( + " mult %0, %3, %4\n" + " mflo %1\n" + " mfhi %2\n" + : "=r" (rd), "=r" (lo), "=r" (hi) + : "r" (rs), "r" (rt)); + r = ((int64_t)hi << 32) | (uint32_t)lo; + + assert((int64_t)rs * rt == r); + assert(rd == lo); + + return r; +} + +static void verify_mult_negations(int32_t rs, int32_t rt, int64_t expected) +{ + assert(mult(rs, rt) == expected); + assert(mult(-rs, rt) == -expected); + assert(mult(rs, -rt) == -expected); + assert(mult(-rs, -rt) == expected); +} + +int main() +{ + verify_mult_negations(17, 19, 323); + verify_mult_negations(77773, 99991, 7776600043); + verify_mult_negations(12207031, 305175781, 3725290219116211); + + assert(mult(-0x80000000, 0x7FFFFFFF) == -0x3FFFFFFF80000000); + assert(mult(-0x80000000, -0x7FFFFFFF) == 0x3FFFFFFF80000000); + assert(mult(-0x80000000, -0x80000000) == 0x4000000000000000); + + return 0; +} |