| /* { 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 <stdint.h> |
| |
| #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" } } */ |