diff options
Diffstat (limited to 'riscv')
| -rw-r--r-- | riscv/decode.h | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/riscv/decode.h b/riscv/decode.h index 0f12262..72e2dc8 100644 --- a/riscv/decode.h +++ b/riscv/decode.h @@ -476,31 +476,27 @@ static inline bool is_overlaped(const int astart, const int asize, #define INT_ROUNDING(result, xrm, gb) \ - if (gb > 0) { \ - switch(xrm) {\ + do { \ + const uint64_t lsb = 1UL << (gb); \ + const uint64_t lsb_half = lsb >> 1; \ + switch (xrm) {\ case VRM::RNU:\ - result += ((uint64_t)1 << ((gb) - 1));\ + result += lsb_half; \ break;\ case VRM::RNE:\ - if ((result & ((uint64_t)0x3 << ((gb) - 1))) == 0x1){\ - result -= ((uint64_t)1 << ((gb) - 1));\ - }else if ((result & ((uint64_t)0x3 << ((gb) - 1))) == 0x3){\ - result += ((uint64_t)1 << ((gb) - 1));\ - }\ + if ((result & lsb_half) && ((result & (lsb_half - 1)) || (result & lsb))) \ + result += lsb; \ break;\ case VRM::RDN:\ - result = (result >> ((gb) - 1)) << ((gb) - 1);\ break;\ case VRM::ROD:\ - result |= ((uint64_t)1ul << (gb)); \ + if (result & (lsb - 1)) \ + result |= lsb; \ break;\ case VRM::INVALID_RM:\ assert(true);\ } \ - } else if (gb == 0 && xrm == VRM::ROD) { \ - result |= 1ul; \ - } - + } while (0) // // vector: integer and masking operand access helper |