[Pixman] [PATCH v3 3/3] mmx: Use _mm_shuffle_pi16
Matt Turner
mattst88 at gmail.com
Mon Feb 20 15:35:00 PST 2012
The pshufw x86 instruction is part of Extended 3DNow! and SSE1. The
equivalent ARM wshufh instruction was available from the first iwMMXt
instrucion set.
This instruction is already used in the SSE2 code.
Reduces code size by ~9%.
amd64
text data bss dec hex filename
29925 2240 0 32165 7da5 .libs/libpixman_mmx_la-pixman-mmx.o
27237 2240 0 29477 7325 .libs/libpixman_mmx_la-pixman-mmx.o
x86
text data bss dec hex filename
27677 1792 0 29469 731d .libs/libpixman_mmx_la-pixman-mmx.o
24959 1792 0 26751 687f .libs/libpixman_mmx_la-pixman-mmx.o
arm
text data bss dec hex filename
30176 1792 0 31968 7ce0 .libs/libpixman_iwmmxt_la-pixman-mmx.o
27384 1792 0 29176 71f8 .libs/libpixman_iwmmxt_la-pixman-mmx.o
Signed-off-by: Matt Turner <mattst88 at gmail.com>
---
pixman/pixman-mmx.c | 48 ++++++++++++------------------------------------
1 files changed, 12 insertions(+), 36 deletions(-)
diff --git a/pixman/pixman-mmx.c b/pixman/pixman-mmx.c
index c12a7df..ec56902 100644
--- a/pixman/pixman-mmx.c
+++ b/pixman/pixman-mmx.c
@@ -65,8 +65,17 @@ _mm_mulhi_pu16 (__m64 __A, __m64 __B)
{
return (__m64) __builtin_ia32_pmulhuw ((__v4hi)__A, (__v4hi)__B);
}
+
+extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_shuffle_pi16 (__m64 __A, int const __N)
+{
+ return (__m64) __builtin_ia32_pshufw ((__v4hi)__A, __N);
+}
#endif
+#define _MM_SHUFFLE(fp3,fp2,fp1,fp0) \
+ (((fp3) << 6) | ((fp2) << 4) | ((fp1) << 2) | (fp0))
+
/* Notes about writing mmx code
*
* give memory operands as the second operand. If you give it as the
@@ -245,52 +254,19 @@ pix_add (__m64 a, __m64 b)
static force_inline __m64
expand_alpha (__m64 pixel)
{
- __m64 t1, t2;
-
- t1 = shift (pixel, -48);
- t2 = shift (t1, 16);
- t1 = _mm_or_si64 (t1, t2);
- t2 = shift (t1, 32);
- t1 = _mm_or_si64 (t1, t2);
-
- return t1;
+ return _mm_shuffle_pi16(pixel, _MM_SHUFFLE (3, 3, 3, 3));
}
static force_inline __m64
expand_alpha_rev (__m64 pixel)
{
- __m64 t1, t2;
-
- /* move alpha to low 16 bits and zero the rest */
- t1 = shift (pixel, 48);
- t1 = shift (t1, -48);
-
- t2 = shift (t1, 16);
- t1 = _mm_or_si64 (t1, t2);
- t2 = shift (t1, 32);
- t1 = _mm_or_si64 (t1, t2);
-
- return t1;
+ return _mm_shuffle_pi16(pixel, _MM_SHUFFLE (0, 0, 0, 0));
}
static force_inline __m64
invert_colors (__m64 pixel)
{
- __m64 x, y, z;
-
- x = y = z = pixel;
-
- x = _mm_and_si64 (x, MC (ffff0000ffff0000));
- y = _mm_and_si64 (y, MC (000000000000ffff));
- z = _mm_and_si64 (z, MC (0000ffff00000000));
-
- y = shift (y, 32);
- z = shift (z, -32);
-
- x = _mm_or_si64 (x, y);
- x = _mm_or_si64 (x, z);
-
- return x;
+ return _mm_shuffle_pi16(pixel, _MM_SHUFFLE (3, 0, 1, 2));
}
static force_inline __m64
--
1.7.3.4
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