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authorUlrich Drepper <drepper@redhat.com>2009-07-03 03:23:01 -0700
committerUlrich Drepper <drepper@redhat.com>2009-07-03 03:23:01 -0700
commitcea43295928d46c3a951ac9d949197c83da7e217 (patch)
tree805eec7ca2ab0d954927aa0956c164dcc98ee77e /sysdeps/x86_64/multiarch/strspn-c.c
parentd6485c981b2b5aa4eb7cedc1ed1508183cb686f8 (diff)
downloadglibc-cea43295928d46c3a951ac9d949197c83da7e217.tar.gz
Minor cleanups in recently added files.
Diffstat (limited to 'sysdeps/x86_64/multiarch/strspn-c.c')
-rw-r--r--sysdeps/x86_64/multiarch/strspn-c.c45
1 files changed, 21 insertions, 24 deletions
diff --git a/sysdeps/x86_64/multiarch/strspn-c.c b/sysdeps/x86_64/multiarch/strspn-c.c
index e48e4a7207..5b99f0d383 100644
--- a/sysdeps/x86_64/multiarch/strspn-c.c
+++ b/sysdeps/x86_64/multiarch/strspn-c.c
@@ -54,26 +54,22 @@
extern size_t __strspn_sse2 (const char *, const char *);
+
size_t
__attribute__ ((section (".text.sse4.2")))
__strspn_sse42 (const char *s, const char *a)
{
- int offset;
- const char *aligned;
- __m128i mask, mask0, mask1;
- __m128i value;
- int index, length;
- int cflag;
-
if (*a == 0)
return 0;
- offset = (int) ((size_t) a & 15);
+ const char *aligned;
+ __m128i mask;
+ int offset = (int) ((size_t) a & 15);
if (offset != 0)
{
/* Load masks. */
aligned = (const char *) ((size_t) a & 0xfffffffffffffff0L);
- mask0 = _mm_load_si128 ((__m128i *) aligned);
+ __m128i mask0 = _mm_load_si128 ((__m128i *) aligned);
switch (offset)
{
@@ -125,12 +121,12 @@ __strspn_sse42 (const char *s, const char *a)
}
/* Find where the NULL terminator is. */
- length = _mm_cmpistri (mask, mask, 0x3a);
+ int length = _mm_cmpistri (mask, mask, 0x3a);
if (length == 16 - offset)
{
/* There is no NULL terminator. */
- mask1 = _mm_load_si128 ((__m128i *) (aligned + 16));
- index = _mm_cmpistri (mask1, mask1, 0x3a);
+ __m128i mask1 = _mm_load_si128 ((__m128i *) (aligned + 16));
+ int index = _mm_cmpistri (mask1, mask1, 0x3a);
length += index;
/* Don't use SSE4.2 if the length of A > 16. */
@@ -197,7 +193,7 @@ __strspn_sse42 (const char *s, const char *a)
mask = _mm_load_si128 ((__m128i *) a);
/* Find where the NULL terminator is. */
- length = _mm_cmpistri (mask, mask, 0x3a);
+ int length = _mm_cmpistri (mask, mask, 0x3a);
if (length == 16)
{
/* There is no NULL terminator. Don't use SSE4.2 if the length
@@ -212,7 +208,7 @@ __strspn_sse42 (const char *s, const char *a)
{
/* Check partial string. */
aligned = (const char *) ((size_t) s & 0xfffffffffffffff0L);
- value = _mm_load_si128 ((__m128i *) aligned);
+ __m128i value = _mm_load_si128 ((__m128i *) aligned);
switch (offset)
{
@@ -263,12 +259,12 @@ __strspn_sse42 (const char *s, const char *a)
break;
}
- length = _mm_cmpistri (mask, value, 0x12);
+ int length = _mm_cmpistri (mask, value, 0x12);
/* No need to check CFlag since it is always 1. */
if (length < 16 - offset)
return length;
/* Find where the NULL terminator is. */
- index = _mm_cmpistri (value, value, 0x3a);
+ int index = _mm_cmpistri (value, value, 0x3a);
if (index < 16 - offset)
return length;
aligned += 16;
@@ -276,12 +272,13 @@ __strspn_sse42 (const char *s, const char *a)
else
aligned = s;
-loop:
- value = _mm_load_si128 ((__m128i *) aligned);
- index = _mm_cmpistri (mask, value, 0x12);
- cflag = _mm_cmpistrc (mask, value, 0x12);
- if (cflag)
- return (size_t) (aligned + index - s);
- aligned += 16;
- goto loop;
+ while (1)
+ {
+ __m128i value = _mm_load_si128 ((__m128i *) aligned);
+ int index = _mm_cmpistri (mask, value, 0x12);
+ int cflag = _mm_cmpistrc (mask, value, 0x12);
+ if (cflag)
+ return (size_t) (aligned + index - s);
+ aligned += 16;
+ }
}