mesa: Add SSE 4.1 optimisation for glDrawElements.

Makes use of SSE 4.1 to speed up compute of min and max elements.

Callgrind cpu usage results from pts benchmarks:

Openarena 0.8.8: 3.67% -> 1.03%
UrbanTerror: 2.36% -> 0.81%

V5:
- actually make use of the optimisation in android (Emil Velikov)
- set a better array size limit for using SSE and added TODO

V4:
- fixed bugs with incrementing pointer and updating counters

V3:
- Removed sse_minmax.c from Makefile.sources
- handle the first few values without SSE until the pointer is aligned
 and use _mm_load_si128 rather than _mm_loadu_si128
- guard the call to the SSE code better at build time

V2:
- removed GL* types
- use _mm_store_si128() rather than _mm_store_ps()
- add runtime check for SSE
- use aligned attribute for local mix/max
- bunch of tidyups

Reviewed-by: Juha-Pekka Heikkila <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Signed-off-by: Timothy Arceri <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mesa/Makefile.am b/src/mesa/Makefile.am
index e71bccbbe64..932db4fb87c 100644
--- a/src/mesa/Makefile.am
+++ b/src/mesa/Makefile.am
@@ -151,7 +151,8 @@ libmesagallium_la_LIBADD = \
 	$(ARCH_LIBS)
 
 libmesa_sse41_la_SOURCES = \
-	main/streaming-load-memcpy.c
+	main/streaming-load-memcpy.c \
+	main/sse_minmax.c
 libmesa_sse41_la_CFLAGS = $(AM_CFLAGS) -msse4.1
 
 pkgconfigdir = $(libdir)/pkgconfig