From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.dg/optimize-bswapsi-1.c | 52 +++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/optimize-bswapsi-1.c (limited to 'gcc/testsuite/gcc.dg/optimize-bswapsi-1.c') diff --git a/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c b/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c new file mode 100644 index 000000000..78238e309 --- /dev/null +++ b/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c @@ -0,0 +1,52 @@ +/* { dg-do compile { target arm*-*-* alpha*-*-* i?86-*-* powerpc*-*-* rs6000-*-* x86_64-*-* s390*-*-* } } */ +/* { dg-require-effective-target stdint_types } */ +/* { dg-options "-O2 -fdump-tree-bswap" } */ +/* { dg-options "-O2 -fdump-tree-bswap -march=z900" { target s390-*-* } } */ + +#include + +#define __const_swab32(x) ((uint32_t)( \ + (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \ + (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \ + (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | \ + (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24))) + +/* This byte swap implementation is used by the Linux kernel and the + GNU C library. */ + +uint32_t +swap32_a (uint32_t in) +{ + return __const_swab32 (in); +} + +/* The OpenSSH byte swap implementation. */ +uint32_t +swap32_b (uint32_t in) +{ + uint32_t a; + + a = (in << 16) | (in >> 16); + a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8); + + return a; +} + +/* This variant is currently used by libgcc. The difference is that + the bswap source and destination have a signed integer type which + requires a slightly higher search depth in order to dive through + the cast as well. */ + +typedef int SItype __attribute__ ((mode (SI))); + +SItype +swap32_c (SItype u) +{ + return ((((u) & 0xff000000) >> 24) + | (((u) & 0x00ff0000) >> 8) + | (((u) & 0x0000ff00) << 8) + | (((u) & 0x000000ff) << 24)); +} + +/* { dg-final { scan-tree-dump-times "32 bit bswap implementation found at" 3 "bswap" } } */ +/* { dg-final { cleanup-tree-dump "bswap" } } */ -- cgit v1.2.3