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authorRich Felker <dalias@aerifal.cx>2011-04-12 13:13:27 -0400
committerRich Felker <dalias@aerifal.cx>2011-04-12 13:13:27 -0400
commitc89862660bd3845ace7977480db3a43dc80475f4 (patch)
tree4b3c890588e359f7e7674898acecbe1aacd95336 /src/network/ntohl.c
parentc546be175c169399420fff4706cd1d4fcefd7d31 (diff)
downloadmusl-c89862660bd3845ace7977480db3a43dc80475f4.tar.gz
optimize ntohl etc. in terms of bswap functions
we can do this without violating the namespace now that they are macros/inline functions rather than extern functions. the motivation is that gcc was generating giant, slow, horrible code for the old functions, and now generates a single byte-swapping instruction.
Diffstat (limited to 'src/network/ntohl.c')
-rw-r--r--src/network/ntohl.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/src/network/ntohl.c b/src/network/ntohl.c
index 64379196..d6fce459 100644
--- a/src/network/ntohl.c
+++ b/src/network/ntohl.c
@@ -1,10 +1,8 @@
#include <netinet/in.h>
+#include <byteswap.h>
uint32_t ntohl(uint32_t n)
{
- union {
- uint32_t i;
- uint8_t b[4];
- } u = { n };
- return (u.b[0]<<24) | (u.b[1]<<16) | (u.b[2]<<8) | u.b[3];
+ union { int i; char c; } u = { 1 };
+ return u.c ? bswap_32(n) : n;
}