[Pixman] [PATCH 07/11] mmx: introduce is_equal and is_zero functions
Matt Turner
mattst88 at gmail.com
Wed Mar 14 21:00:45 PDT 2012
To be used by the next commit.
Signed-off-by: Matt Turner <mattst88 at gmail.com>
---
pixman/pixman-mmx.c | 29 +++++++++++++++++++++++++++++
1 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/pixman/pixman-mmx.c b/pixman/pixman-mmx.c
index 41c655a..0cc8935 100644
--- a/pixman/pixman-mmx.c
+++ b/pixman/pixman-mmx.c
@@ -67,6 +67,18 @@ _mm_empty (void)
/* We have to compile with -msse to use xmmintrin.h, but that causes SSE
* instructions to be generated that we don't want. Just duplicate the
* functions we want to use. */
+extern __inline int __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_movemask_pi8 (__m64 __A)
+{
+ int ret;
+
+ asm ("pmovmskb %1, %0\n\t"
+ : "=r" (ret)
+ : "y" (__A)
+ );
+
+ return ret;
+}
extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_mulhi_pu16 (__m64 __A, __m64 __B)
{
@@ -420,6 +432,23 @@ store8888 (uint32_t *dest, __m64 v)
store (dest, v);
}
+static force_inline pixman_bool_t
+is_equal (__m64 a, __m64 b)
+{
+#ifdef USE_LOONGSON_MMI
+ /* __m64 is double, we can compare directly. */
+ return a == b;
+#else
+ return _mm_movemask_pi8 (_mm_cmpeq_pi8 (a, b)) == 0xff;
+#endif
+}
+
+static force_inline pixman_bool_t
+is_zero (__m64 v)
+{
+ return is_equal (v, _mm_setzero_si64 ());
+}
+
/* Expand 16 bits positioned at @pos (0-3) of a mmx register into
*
* 00RR00GG00BB
--
1.7.3.4
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