sna: Detect available instruction sets at runtime

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

src/sna/Makefile.am

@@ -48,6 +48,7 @@ libsna_la_SOURCES = \
 	sna_accel.c \
 	sna_blt.c \
 	sna_composite.c \
+	sna_cpu.c \
 	sna_damage.c \
 	sna_damage.h \
 	sna_display.c \

src/sna/sna.h

@@ -207,6 +207,18 @@ struct sna {
 #define SNA_TEAR_FREE		0x10
 #define SNA_FORCE_SHADOW	0x20
 
+	unsigned cpu_features;
+#define MMX 0x1
+#define SSE 0x2
+#define SSE2 0x4
+#define SSE3 0x8
+#define SSSE3 0x10
+#define SSE4a 0x20
+#define SSE4_1 0x40
+#define SSE4_2 0x80
+#define AVX 0x100
+#define AVX2 0x200
+
 	unsigned watch_flush;
 
 	struct timeval timer_tv;
@@ -855,6 +867,8 @@ inline static bool is_clipped(const RegionRec *r,
 		r->extents.y2 - r->extents.y1 != d->height);
 }
 
+unsigned sna_cpu_detect(void);
+
 void sna_threads_init(void);
 int sna_use_threads (int width, int height, int threshold);
 void sna_threads_run(void (*func)(void *arg), void *arg);

src/sna/sna_accel.c

@@ -1371,7 +1371,7 @@ static bool
 sna_pixmap_create_mappable_gpu(PixmapPtr pixmap)
 {
 	struct sna *sna = to_sna_from_pixmap(pixmap);
-	struct sna_pixmap *priv = sna_pixmap(pixmap);;
+	struct sna_pixmap *priv = sna_pixmap(pixmap);
 	unsigned create;
 
 	if (wedged(sna))

src/sna/sna_cpu.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "sna.h"
+
+#include <cpuid.h>
+
+unsigned sna_cpu_detect(void)
+{
+	unsigned int eax, ebx, ecx, edx;
+	unsigned features = 0;
+
+	__cpuid(0, eax, ebx, ecx, edx);
+
+	if (eax & bit_SSE3)
+		features |= SSE3;
+
+	if (eax & bit_SSSE3)
+		features |= SSSE3;
+
+	if (eax & bit_SSE4_1)
+		features |= SSE4_1;
+
+	if (eax & bit_SSE4_2)
+		features |= SSE4_2;
+
+	if (eax & bit_AVX)
+		features |= AVX;
+
+	if (edx & bit_MMX)
+		features |= MMX;
+
+	if (edx & bit_SSE)
+		features |= SSE;
+
+	if (edx & bit_SSE2)
+		features |= SSE2;
+
+	if (edx & bit_SSE4a)
+		features |= SSE4a;
+
+	__cpuid(7, eax, ebx, ecx, edx);
+
+	if (eax & bit_AVX2)
+		features |= AVX2;
+
+	return features;
+}

src/sna/sna_driver.c

@@ -487,6 +487,8 @@ static Bool sna_pre_init(ScrnInfoPtr scrn, int flags)
 
 		sna->info = (void *)((uintptr_t)scrn->driverPrivate & ~1);
 		scrn->driverPrivate = sna;
+
+		sna->cpu_features = sna_cpu_detect();
 	}
 	sna = to_sna(scrn);
 	sna->scrn = scrn;