[Pixman] [PATCH 2/2] mmx: Use Loongson pextrh instruction in expand565

[Matt Turner]

Same story as pinsrh in the previous commit.

 text	data	bss	dec	hex filename
25336	1952	  0   27288    6a98 .libs/libpixman_loongson_mmi_la-pixman-mmx.o
25072	1952	  0   27024    6990 .libs/libpixman_loongson_mmi_la-pixman-mmx.o

-dsll: 95
+dsll: 70
-dsrl: 135
+dsrl: 105
-ldc1: 462
+ldc1: 445
-lw: 721
+lw: 700
+pextrh: 30
---
 pixman/loongson-mmintrin.h |   11 +++++++++++
 pixman/pixman-mmx.c        |    4 ++++
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/pixman/loongson-mmintrin.h b/pixman/loongson-mmintrin.h
index a67e45a..333c65e 100644
--- a/pixman/loongson-mmintrin.h
+++ b/pixman/loongson-mmintrin.h
@@ -218,6 +218,17 @@ _mm_xor_si64 (__m64 __m1, __m64 __m2)
 }
 
 extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+loongson_extract_pi16 (__m64 __m, int64_t __pos)
+{
+	__m64 ret;
+	asm("pextrh %0, %1, %2\n\t"
+	   : "=f" (ret)
+	   : "f" (__m), "f" (*(__m64 *)&__pos)
+	);
+	return ret;
+}
+
+extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 loongson_insert_pi16 (__m64 __m1, __m64 __m2, int __pos)
 {
 	__m64 ret;
diff --git a/pixman/pixman-mmx.c b/pixman/pixman-mmx.c
index a547e23..cc2121e 100644
--- a/pixman/pixman-mmx.c
+++ b/pixman/pixman-mmx.c
@@ -488,7 +488,11 @@ expand565 (__m64 pixel, int pos)
     __m64 t1, t2;
 
     /* move pixel to low 16 bit and zero the rest */
+#ifdef USE_LOONGSON_MMI
+    p = loongson_extract_pi16 (p, pos);
+#else
     p = shift (shift (p, (3 - pos) * 16), -48);
+#endif
 
     t1 = shift (p, 36 - 11);
     t2 = shift (p, 16 - 5);
-- 
1.7.8.5