Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/optimize-bswapdi-2.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* { dg-do compile } */ /* { dg-require-effective-target bswap } */ /* { dg-require-effective-target stdint_types } */ /* { dg-options "-O2 -fdump-tree-bswap" } */ /* { dg-additional-options "-mzarch" { target s390*-*-* } } */ #include <stdint.h> /* A variant via unsigned short. */ uint64_t swap64_c (uint64_t x) { uint16_t a0 = x >> 48; uint16_t a1 = x >> 32; uint16_t a2 = x >> 16; uint16_t a3 = x; return ((uint64_t) (((a0 >> 8) & 0xff) | ((a0 << 8) & 0xff00))) | ((uint64_t) (((a1 >> 8) & 0xff) | ((a1 << 8) & 0xff00)) << 16) | ((uint64_t) (((a2 >> 8) & 0xff) | ((a2 << 8) & 0xff00)) << 32) | ((uint64_t) (((a3 >> 8) & 0xff) | ((a3 << 8) & 0xff00)) << 48); } /* { dg-final { scan-tree-dump-times "64 bit bswap implementation found at" 1 "bswap" } } */