Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/tree-ssa/pr31966.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* Contributed by Jack Lloyd <lloyd@randombit.net> */ /* { dg-options "-O2 -ftree-vectorize" } */ /* { dg-options "-O2 -ftree-vectorize -march=nocona" { target { i?86-*-* x86_64-*-* } } } */ typedef unsigned long long word; const unsigned int MP_WORD_BITS = 64; const word MP_WORD_MASK = ~((word)0); const word MP_WORD_TOP_BIT = (word)1 << (8*sizeof(word) - 1); extern void abort (void); word do_div(word n1, word n0, word d) { word high = n1 % d, quotient = 0; unsigned int j; for(j = 0; j != MP_WORD_BITS; ++j) { word high_top_bit = (high & MP_WORD_TOP_BIT); high <<= 1; high |= (n0 >> (MP_WORD_BITS-1-j)) & 1; quotient <<= 1; if(high_top_bit || high >= d) { high -= d; quotient |= 1; } } return quotient; } int main() { word result; result = do_div(0x0000000000200000ll, 0x0000000000000000ll, 0x86E53497CE000000ll); if (result != 0x3CBA83) abort (); return 0; }