diff options
Diffstat (limited to 'gcc/libgcc2.c')
| -rw-r--r-- | gcc/libgcc2.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gcc/libgcc2.c b/gcc/libgcc2.c index fbf5dcc..57c40c5 100644 --- a/gcc/libgcc2.c +++ b/gcc/libgcc2.c @@ -762,7 +762,50 @@ __ctzDI2 (UDWtype x) return ret + add; } #endif + +#ifdef L_clrsbsi2 +#undef int +int +__clrsbSI2 (Wtype x) +{ + Wtype ret; + if (x < 0) + x = ~x; + if (x == 0) + return W_TYPE_SIZE - 1; + count_leading_zeros (ret, x); + return ret - 1; +} +#endif + +#ifdef L_clrsbdi2 +#undef int +int +__clrsbDI2 (DWtype x) +{ + const DWunion uu = {.ll = x}; + UWtype word; + Wtype ret, add; + + if (uu.s.high == 0) + word = uu.s.low, add = W_TYPE_SIZE; + else if (uu.s.high == -1) + word = ~uu.s.low, add = W_TYPE_SIZE; + else if (uu.s.high >= 0) + word = uu.s.high, add = 0; + else + word = ~uu.s.high, add = 0; + + if (word == 0) + ret = W_TYPE_SIZE; + else + count_leading_zeros (ret, word); + + return ret + add - 1; +} +#endif + #ifdef L_popcount_tab const UQItype __popcount_tab[256] = { |