Mercurial > hg > CbC > CbC_gcc

annotate gcc/testsuite/gcc.dg/optimize-bswapsi-4.c @ 111:04ced10e8804

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 84e7813d76e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
111
kono
parents:
diff changeset
1 /* { dg-do compile } */
kono
parents:
diff changeset
2 /* { dg-require-effective-target bswap32 } */
kono
parents:
diff changeset
3 /* { dg-options "-O2 -fdump-tree-bswap" } */
kono
parents:
diff changeset
4 /* { dg-additional-options "-march=z900" { target s390-*-* } } */
kono
parents:
diff changeset
5
kono
parents:
diff changeset
6 typedef unsigned char u8;
kono
parents:
diff changeset
7 typedef unsigned int u32;
kono
parents:
diff changeset
8 union __anonunion
kono
parents:
diff changeset
9 {
kono
parents:
diff changeset
10 u32 value;
kono
parents:
diff changeset
11 u8 bytes[4];
kono
parents:
diff changeset
12 };
kono
parents:
diff changeset
13
kono
parents:
diff changeset
14 u32
kono
parents:
diff changeset
15 acpi_ut_dword_byte_swap (u32 value)
kono
parents:
diff changeset
16 {
kono
parents:
diff changeset
17 union __anonunion in;
kono
parents:
diff changeset
18 in.value = value;
kono
parents:
diff changeset
19 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
kono
parents:
diff changeset
20 return ((in.bytes[0] << 24) | (in.bytes[1] << 16)
kono
parents:
diff changeset
21 | (in.bytes[2] << 8) | in.bytes[3]);
kono
parents:
diff changeset
22 #else
kono
parents:
diff changeset
23 return ((in.bytes[3] << 24) | (in.bytes[2] << 16)
kono
parents:
diff changeset
24 | (in.bytes[1] << 8) | in.bytes[0]);
kono
parents:
diff changeset
25 #endif
kono
parents:
diff changeset
26 }
kono
parents:
diff changeset
27
kono
parents:
diff changeset
28 /* { dg-final { scan-tree-dump "32 bit bswap implementation found at" "bswap" } } */