diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | sysdeps/tile/tilegx/string-endian.h | 11 |
2 files changed, 9 insertions, 6 deletions
@@ -1,3 +1,7 @@ +2014-10-02 Chris Metcalf <cmetcalf@tilera.com> + + * sysdeps/tile/tilegx/string-endian.h (copy_byte): Optimize. + 2014-10-06 Arjun Shankar <arjun.is@lostca.se> * nptl/tst-setuid3.c: Write errors to stdout. diff --git a/sysdeps/tile/tilegx/string-endian.h b/sysdeps/tile/tilegx/string-endian.h index 0c4d51766d..47333891e0 100644 --- a/sysdeps/tile/tilegx/string-endian.h +++ b/sysdeps/tile/tilegx/string-endian.h @@ -36,12 +36,11 @@ #define REVCZ(x) __insn_ctz(x) #endif -/* Create eight copies of the byte in a uint64_t. */ +/* Create eight copies of the byte in a uint64_t. Byte Shuffle uses + the bytes of srcB as the index into the dest vector to select a + byte. With all indices of zero, the first byte is copied into all + the other bytes. */ static inline uint64_t copy_byte(uint8_t byte) { - uint64_t word = byte; - word = __insn_bfins(word, word, 8, 15); - word = __insn_bfins(word, word, 16, 31); - word = __insn_bfins(word, word, 32, 63); - return word; + return __insn_shufflebytes(byte, 0, 0); } |