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-rw-r--r--src/math/bigint/mp_asm64/mp_asm.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/math/bigint/mp_asm64/mp_asm.h b/src/math/bigint/mp_asm64/mp_asm.h
index c9159eaa7..b0906095d 100644
--- a/src/math/bigint/mp_asm64/mp_asm.h
+++ b/src/math/bigint/mp_asm64/mp_asm.h
@@ -47,7 +47,10 @@ namespace Botan {
#elif defined(BOTAN_TARGET_ARCH_IS_MIPS64)
#define BOTAN_WORD_MUL(a,b,z1,z0) do { \
- asm("dmultu %2,%3" : "=h" (z0), "=l" (z1) : "r" (a), "r" (b)); \
+ typedef unsigned int uint128_t __attribute__((mode(TI))); \
+ uint128_t r = (uint128_t)a * b; \
+ z0 = (r >> 64) & 0xFFFFFFFFFFFFFFFF; \
+ z1 = (r ) & 0xFFFFFFFFFFFFFFFF; \
} while(0);
#else