diff options
Diffstat (limited to 'compiler-rt/lib/builtins/muldi3.c')
| -rw-r--r-- | compiler-rt/lib/builtins/muldi3.c | 57 |
1 files changed, 26 insertions, 31 deletions
diff --git a/compiler-rt/lib/builtins/muldi3.c b/compiler-rt/lib/builtins/muldi3.c index 9a80b12bbff..dd7c905d415 100644 --- a/compiler-rt/lib/builtins/muldi3.c +++ b/compiler-rt/lib/builtins/muldi3.c @@ -15,41 +15,36 @@ /* Returns: a * b */ -static -di_int -__muldsi3(su_int a, su_int b) -{ - dwords r; - const int bits_in_word_2 = (int)(sizeof(si_int) * CHAR_BIT) / 2; - const su_int lower_mask = (su_int)~0 >> bits_in_word_2; - r.s.low = (a & lower_mask) * (b & lower_mask); - su_int t = r.s.low >> bits_in_word_2; - r.s.low &= lower_mask; - t += (a >> bits_in_word_2) * (b & lower_mask); - r.s.low += (t & lower_mask) << bits_in_word_2; - r.s.high = t >> bits_in_word_2; - t = r.s.low >> bits_in_word_2; - r.s.low &= lower_mask; - t += (b >> bits_in_word_2) * (a & lower_mask); - r.s.low += (t & lower_mask) << bits_in_word_2; - r.s.high += t >> bits_in_word_2; - r.s.high += (a >> bits_in_word_2) * (b >> bits_in_word_2); - return r.all; +static di_int __muldsi3(su_int a, su_int b) { + dwords r; + const int bits_in_word_2 = (int)(sizeof(si_int) * CHAR_BIT) / 2; + const su_int lower_mask = (su_int)~0 >> bits_in_word_2; + r.s.low = (a & lower_mask) * (b & lower_mask); + su_int t = r.s.low >> bits_in_word_2; + r.s.low &= lower_mask; + t += (a >> bits_in_word_2) * (b & lower_mask); + r.s.low += (t & lower_mask) << bits_in_word_2; + r.s.high = t >> bits_in_word_2; + t = r.s.low >> bits_in_word_2; + r.s.low &= lower_mask; + t += (b >> bits_in_word_2) * (a & lower_mask); + r.s.low += (t & lower_mask) << bits_in_word_2; + r.s.high += t >> bits_in_word_2; + r.s.high += (a >> bits_in_word_2) * (b >> bits_in_word_2); + return r.all; } /* Returns: a * b */ -COMPILER_RT_ABI di_int -__muldi3(di_int a, di_int b) -{ - dwords x; - x.all = a; - dwords y; - y.all = b; - dwords r; - r.all = __muldsi3(x.s.low, y.s.low); - r.s.high += x.s.high * y.s.low + x.s.low * y.s.high; - return r.all; +COMPILER_RT_ABI di_int __muldi3(di_int a, di_int b) { + dwords x; + x.all = a; + dwords y; + y.all = b; + dwords r; + r.all = __muldsi3(x.s.low, y.s.low); + r.s.high += x.s.high * y.s.low + x.s.low * y.s.high; + return r.all; } #if defined(__ARM_EABI__) |

