diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/strspn-c.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strspn-c.c | 154 |
1 files changed, 8 insertions, 146 deletions
diff --git a/sysdeps/x86_64/multiarch/strspn-c.c b/sysdeps/x86_64/multiarch/strspn-c.c index be9e8ac0a8..6faa259fd7 100644 --- a/sysdeps/x86_64/multiarch/strspn-c.c +++ b/sysdeps/x86_64/multiarch/strspn-c.c @@ -1,5 +1,5 @@ /* strspn with SSE4.2 intrinsics - Copyright (C) 2009 Free Software Foundation, Inc. + Copyright (C) 2009, 2010 Free Software Foundation, Inc. Contributed by Intel Corporation. This file is part of the GNU C Library. @@ -20,6 +20,7 @@ #include <nmmintrin.h> #include <string.h> +#include "varshift.h" /* We use 0x12: _SIDD_SBYTE_OPS @@ -71,54 +72,7 @@ __strspn_sse42 (const char *s, const char *a) aligned = (const char *) ((size_t) a & -16L); __m128i mask0 = _mm_load_si128 ((__m128i *) aligned); - switch (offset) - { - case 1: - mask = _mm_srli_si128 (mask0, 1); - break; - case 2: - mask = _mm_srli_si128 (mask0, 2); - break; - case 3: - mask = _mm_srli_si128 (mask0, 3); - break; - case 4: - mask = _mm_srli_si128 (mask0, 4); - break; - case 5: - mask = _mm_srli_si128 (mask0, 5); - break; - case 6: - mask = _mm_srli_si128 (mask0, 6); - break; - case 7: - mask = _mm_srli_si128 (mask0, 7); - break; - case 8: - mask = _mm_srli_si128 (mask0, 8); - break; - case 9: - mask = _mm_srli_si128 (mask0, 9); - break; - case 10: - mask = _mm_srli_si128 (mask0, 10); - break; - case 11: - mask = _mm_srli_si128 (mask0, 11); - break; - case 12: - mask = _mm_srli_si128 (mask0, 12); - break; - case 13: - mask = _mm_srli_si128 (mask0, 13); - break; - case 14: - mask = _mm_srli_si128 (mask0, 14); - break; - case 15: - mask = _mm_srli_si128 (mask0, 15); - break; - } + mask = __m128i_shift_right (mask0, offset); /* Find where the NULL terminator is. */ int length = _mm_cmpistri (mask, mask, 0x3a); @@ -135,55 +89,10 @@ __strspn_sse42 (const char *s, const char *a) if (index != 0) { - /* Combine mask0 and mask1. */ - switch (offset) - { - case 1: - mask = _mm_alignr_epi8 (mask1, mask0, 1); - break; - case 2: - mask = _mm_alignr_epi8 (mask1, mask0, 2); - break; - case 3: - mask = _mm_alignr_epi8 (mask1, mask0, 3); - break; - case 4: - mask = _mm_alignr_epi8 (mask1, mask0, 4); - break; - case 5: - mask = _mm_alignr_epi8 (mask1, mask0, 5); - break; - case 6: - mask = _mm_alignr_epi8 (mask1, mask0, 6); - break; - case 7: - mask = _mm_alignr_epi8 (mask1, mask0, 7); - break; - case 8: - mask = _mm_alignr_epi8 (mask1, mask0, 8); - break; - case 9: - mask = _mm_alignr_epi8 (mask1, mask0, 9); - break; - case 10: - mask = _mm_alignr_epi8 (mask1, mask0, 10); - break; - case 11: - mask = _mm_alignr_epi8 (mask1, mask0, 11); - break; - case 12: - mask = _mm_alignr_epi8 (mask1, mask0, 12); - break; - case 13: - mask = _mm_alignr_epi8 (mask1, mask0, 13); - break; - case 14: - mask = _mm_alignr_epi8 (mask1, mask0, 14); - break; - case 15: - mask = _mm_alignr_epi8 (mask1, mask0, 15); - break; - } + /* Combine mask0 and mask1. We could play games with + palignr, but frankly this data should be in L1 now + so do the merge via an unaligned load. */ + mask = _mm_loadu_si128 ((__m128i *) a); } } } @@ -210,54 +119,7 @@ __strspn_sse42 (const char *s, const char *a) aligned = (const char *) ((size_t) s & -16L); __m128i value = _mm_load_si128 ((__m128i *) aligned); - switch (offset) - { - case 1: - value = _mm_srli_si128 (value, 1); - break; - case 2: - value = _mm_srli_si128 (value, 2); - break; - case 3: - value = _mm_srli_si128 (value, 3); - break; - case 4: - value = _mm_srli_si128 (value, 4); - break; - case 5: - value = _mm_srli_si128 (value, 5); - break; - case 6: - value = _mm_srli_si128 (value, 6); - break; - case 7: - value = _mm_srli_si128 (value, 7); - break; - case 8: - value = _mm_srli_si128 (value, 8); - break; - case 9: - value = _mm_srli_si128 (value, 9); - break; - case 10: - value = _mm_srli_si128 (value, 10); - break; - case 11: - value = _mm_srli_si128 (value, 11); - break; - case 12: - value = _mm_srli_si128 (value, 12); - break; - case 13: - value = _mm_srli_si128 (value, 13); - break; - case 14: - value = _mm_srli_si128 (value, 14); - break; - case 15: - value = _mm_srli_si128 (value, 15); - break; - } + value = __m128i_shift_right (value, offset); int length = _mm_cmpistri (mask, value, 0x12); /* No need to check CFlag since it is always 1. */ |