diff options
| -rw-r--r-- | target/ppc/fpu_helper.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c index 23b9c97439..52bcda27a6 100644 --- a/target/ppc/fpu_helper.c +++ b/target/ppc/fpu_helper.c @@ -58,10 +58,17 @@ uint64_t helper_todouble(uint32_t arg) uint64_t ret; if (likely(abs_arg >= 0x00800000)) { - /* Normalized operand, or Inf, or NaN. */ - ret = (uint64_t)extract32(arg, 30, 2) << 62; - ret |= ((extract32(arg, 30, 1) ^ 1) * (uint64_t)7) << 59; - ret |= (uint64_t)extract32(arg, 0, 30) << 29; + if (unlikely(extract32(arg, 23, 8) == 0xff)) { + /* Inf or NAN. */ + ret = (uint64_t)extract32(arg, 31, 1) << 63; + ret |= (uint64_t)0x7ff << 52; + ret |= (uint64_t)extract32(arg, 0, 23) << 29; + } else { + /* Normalized operand. */ + ret = (uint64_t)extract32(arg, 30, 2) << 62; + ret |= ((extract32(arg, 30, 1) ^ 1) * (uint64_t)7) << 59; + ret |= (uint64_t)extract32(arg, 0, 30) << 29; + } } else { /* Zero or Denormalized operand. */ ret = (uint64_t)extract32(arg, 31, 1) << 63; |