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*: deinline SWAP_xE64 on 32-bit CPUs. Wins !90 bytes both on 32 and 64 bits

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Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko
2010-10-18 11:40:26 +02:00
parent b102e12253
commit 9ff50b8697
7 changed files with 37 additions and 43 deletions
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7
include/libbb.h
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@@ -37,8 +37,6 @@
#include <termios.h>
#include <time.h>
#include <unistd.h>
/* Try to pull in PATH_MAX */
#include <limits.h>
#include <sys/param.h>
#ifdef HAVE_MNTENT_H
# include <mntent.h>
@@ -254,6 +252,11 @@ extern int *const bb_errno;
#define errno (*bb_errno)
#endif
#if !(ULONG_MAX > 0xffffffff)
/* Only 32-bit CPUs need this, 64-bit ones use inlined version */
uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
#endif
unsigned long long monotonic_ns(void) FAST_FUNC;
unsigned long long monotonic_us(void) FAST_FUNC;
unsigned long long monotonic_ms(void) FAST_FUNC;

9
include/platform.h
View File

@@ -150,6 +150,7 @@
/* ---- Endian Detection ------------------------------------ */
#include <limits.h>
#if defined(__digital__) && defined(__unix__)
# include <sex.h>
#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
@@ -189,6 +190,10 @@
# error "Can't determine endianness"
#endif
#if ULONG_MAX > 0xffffffff
# define bb_bswap_64(x) bswap_64(x)
#endif
/* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
#if BB_BIG_ENDIAN
# define SWAP_BE16(x) (x)
@@ -196,13 +201,13 @@
# define SWAP_BE64(x) (x)
# define SWAP_LE16(x) bswap_16(x)
# define SWAP_LE32(x) bswap_32(x)
# define SWAP_LE64(x) bswap_64(x)
# define SWAP_LE64(x) bb_bswap_64(x)
# define IF_BIG_ENDIAN(...) __VA_ARGS__
# define IF_LITTLE_ENDIAN(...)
#else
# define SWAP_BE16(x) bswap_16(x)
# define SWAP_BE32(x) bswap_32(x)
# define SWAP_BE64(x) bswap_64(x)
# define SWAP_BE64(x) bb_bswap_64(x)
# define SWAP_LE16(x) (x)
# define SWAP_LE32(x) (x)
# define SWAP_LE64(x) (x)