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configure: Check for support for labels in the inline assembly

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Use this for enabling the ppc timer.h implementation only on
assemblers that support labels in the inline assembly.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-07-09 20:51:00 +03:00
parent d14a26edb7
commit ef5b70affc
2 changed files with 9 additions and 0 deletions
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3
configure vendored
View File

@ -1294,6 +1294,7 @@ HAVE_LIST="
ibm_asm
inet_aton
io_h
inline_asm_labels
isatty
jack_port_get_latency_range
ldbrx
@ -3405,6 +3406,8 @@ unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
EOF
od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
check_inline_asm inline_asm_labels '"1:\n"'
if enabled alpha; then
check_cflags -mieee

6
libavutil/ppc/timer.h
View File

@ -23,6 +23,10 @@
#include <stdint.h>
#include "config.h"
#if HAVE_INLINE_ASM_LABELS
#define AV_READ_TIME read_time
static inline uint64_t read_time(void)
@ -44,4 +48,6 @@ static inline uint64_t read_time(void)
return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
}
#endif /* HAVE_INLINE_ASM_LABELS */
#endif /* AVUTIL_PPC_TIMER_H */