diff options
| -rw-r--r-- | src/math/bigint/mp_amd64/mp_asmi.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/math/bigint/mp_amd64/mp_asmi.h b/src/math/bigint/mp_amd64/mp_asmi.h index 16632a38d..bf3469526 100644 --- a/src/math/bigint/mp_amd64/mp_asmi.h +++ b/src/math/bigint/mp_amd64/mp_asmi.h @@ -68,12 +68,20 @@ extern "C" { *************************************************/ inline word word_add(word x, word y, word* carry) { +#if 0 asm( ADD_OR_SUBTRACT(ASM("adcq %[y],%[x]")) : [x]"=r"(x), [carry]"=r"(*carry) : "0"(x), [y]"rm"(y), "1"(*carry) : "cc"); return x; +#else + word z = x + y; + word c1 = (z < x); + z += *carry; + *carry = c1 | (z < *carry); + return z; +#endif } /************************************************* |