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authorUlrich Drepper <drepper@redhat.com>2003-12-28 22:47:59 +0000
committerUlrich Drepper <drepper@redhat.com>2003-12-28 22:47:59 +0000
commit63b8eae47a28005453f64ad31b34596a1d419017 (patch)
tree2d46fadf66ecea0af92270178028d276d2675fa4 /libio/libio.h
parentcaac9ddbd36cb772b8dcde1e14ee84946b6548ec (diff)
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Use __builtin_expect in _IO_getc_unlocked, _IO_peekc_unlocked, _IO_ptc_unlcoked, _IO_getwc_unlocked, and _IO_putwc_unlocked.
Diffstat (limited to 'libio/libio.h')
-rw-r--r--libio/libio.h20
1 files changed, 14 insertions, 6 deletions
diff --git a/libio/libio.h b/libio/libio.h
index c70a86ae90c..e7d7bae2b56 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -407,23 +407,31 @@ extern _IO_wint_t __wunderflow (_IO_FILE *) __THROW;
extern _IO_wint_t __wuflow (_IO_FILE *) __THROW;
extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t) __THROW;
+#if __GNUC__ >= 3
+# define _IO_BE(expr, res) __builtin_expect (expr, res)
+#else
+# define _IO_BE(expr, res) (expr)
+#endif
+
#define _IO_getc_unlocked(_fp) \
- ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end ? __uflow (_fp) \
- : *(unsigned char *) (_fp)->_IO_read_ptr++)
+ (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
+ ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
#define _IO_peekc_unlocked(_fp) \
- ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end \
+ (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
&& __underflow (_fp) == EOF ? EOF \
: *(unsigned char *) (_fp)->_IO_read_ptr)
#define _IO_putc_unlocked(_ch, _fp) \
- (((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end) \
+ (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
? __overflow (_fp, (unsigned char) (_ch)) \
: (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
#define _IO_getwc_unlocked(_fp) \
- ((_fp)->_wide_data->_IO_read_ptr >= (_fp)->_wide_data->_IO_read_end \
+ (_IO_BE ((_fp)->_wide_data->_IO_read_ptr >= (_fp)->_wide_data->_IO_read_end,\
+ 0) \
? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
#define _IO_putwc_unlocked(_wch, _fp) \
- ((_fp)->_wide_data->_IO_write_ptr >= (_fp)->_wide_data->_IO_write_end \
+ (_IO_BE ((_fp)->_wide_data->_IO_write_ptr \
+ >= (_fp)->_wide_data->_IO_write_end, 0) \
? __woverflow (_fp, _wch) \
: (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))