Add missing twin_feature.c

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 193 insertions, 0 deletions

diff --git a/libtwin/twin_feature.c b/libtwin/twin_feature.c
new file mode 100644
index 0000000..ceba5ab
--- /dev/null
+++ b/libtwin/twin_feature.c
@@ -0,0 +1,72 @@
+/*
+ * Linux fbdev driver for Twin
+ *
+ * Copyright 2006 Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *
+ * This Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the Twin Library; see the file COPYING.  If not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <signal.h>
+#include <setjmp.h>
+
+#include "twinint.h"
+
+static unsigned int _twin_features;
+
+#ifdef HAVE_ALTIVEC
+
+static jmp_buf _twin_feature_jmpbuf;
+
+static void illegal_instruction(int sig)
+{
+        longjmp(_twin_feature_jmpbuf, 1);
+}
+
+
+static int _twin_have_altivec(void)
+{
+        volatile int altivec = 0;
+        void (*handler)(int sig);
+
+        handler = signal(SIGILL, illegal_instruction);
+        if ( setjmp(_twin_feature_jmpbuf) == 0 ) {
+                asm volatile ("mtspr 256, %0\n\t"
+                              "vand %%v0, %%v0, %%v0"
+                              :
+                              : "r" (-1));
+                altivec = 1;
+        }
+        signal(SIGILL, handler);
+
+	return altivec;
+}
+
+#else
+#define _twin_have_altivec()
+#endif /* HAVE_ALTIVEC */
+
+int twin_has_feature(unsigned int feature)
+{
+	return (_twin_features & feature) != 0;
+}
+
+void twin_feature_init(void)
+{
+	if (_twin_have_altivec())
+		_twin_features |= TWIN_FEATURE_ALTIVEC;
+
+	_twin_draw_set_features();
+}
diff --git a/twin_demos/twinperf.c b/twin_demos/twinperf.c
new file mode 100644
index 0000000..c1730f4
--- /dev/null
+++ b/twin_demos/twinperf.c
@@ -0,0 +1,121 @@
+#include <stdio.h>
+#include <assert.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "twin.h"
+#include "twin_png.h"
+
+#define TEST_PIX_WIDTH		1200
+#define TEST_PIX_HEIGHT		 800
+
+
+twin_pixmap_t	*src32, *dst32, *msk;
+int twidth, theight, titers;
+
+static void test_argb32_source_argb32(void)
+{
+	twin_operand_t srco;
+
+	srco.source_kind = TWIN_PIXMAP;
+	srco.u.pixmap = src32;
+	twin_composite(dst32, 0, 0, &srco, 0, 0, NULL, 0, 0, TWIN_SOURCE,
+		       twidth, theight);
+}
+
+static void test_argb32_over_argb32(void)
+{
+	twin_operand_t srco;
+
+	srco.source_kind = TWIN_PIXMAP;
+	srco.u.pixmap = src32;
+	twin_composite(dst32, 0, 0, &srco, 0, 0, NULL, 0, 0, TWIN_OVER,
+		       twidth, theight);
+}
+
+static void do_test(const char *name, void (*test)(void))
+{
+	struct timeval start, end;
+	unsigned long long sus, eus;
+	char spc[128];
+	char *s;
+	int i;
+
+	printf("%s", name);
+
+	gettimeofday(&start, NULL);
+	for (i = 0; i < titers; i++)
+		test();
+	gettimeofday(&end, NULL);
+	sus = (unsigned long long)start.tv_sec * 1000000ull + start.tv_usec;
+	eus = (unsigned long long)end.tv_sec * 1000000ull + end.tv_usec;
+
+	s = spc;
+	for (i = strlen(name); i <40; i++)
+		*(s++) = ' ';
+	*s = 0;
+	printf("%s %f sec\n", spc, ((float)(eus - sus)) / 1000000.0);
+}
+
+#define DO_TEST(name) do_test(#name, test_##name)
+
+static void do_tests(int width, int height, int iters)
+{
+	twidth = width;
+	theight = height;
+	titers = iters;
+
+	DO_TEST(argb32_source_argb32);
+	DO_TEST(argb32_over_argb32);
+}
+
+static void do_all_tests(const char *title)
+{
+	printf("* %s, 10x10x1000000 :\n", title);
+	do_tests(10, 10, 1000000);
+
+	printf("* %s, 100x100x20000 :\n", title);
+	do_tests(100, 100, 20000);
+
+	printf("* %s, 200x200x10000 :\n", title);
+	do_tests(200, 200, 10000);
+
+	printf("* %s, 1200x800x200 :\n", title);
+	do_tests(1200, 800, 200);
+
+	printf("\n");
+}
+
+int main(void)
+{
+	printf("loading test pixmaps...\n");
+
+	/* Create some test pixmaps */
+	src32 = twin_png_to_pixmap("twinperf-src32.png", TWIN_ARGB32);
+	assert(src32);
+	dst32 = twin_pixmap_create(TWIN_ARGB32,
+				 TEST_PIX_WIDTH, TEST_PIX_HEIGHT);
+	assert(dst32);
+
+#if 0
+	msk = twin_pixmap_create(TWIN_A8,
+				 TEST_PIX_WIDTH, TEST_PIX_HEIGHT);
+	assert(msk);
+#endif
+
+	/* fill pixmaps */
+	twin_fill(dst32, 0x80112233, TWIN_SOURCE, 0, 0,
+		  TEST_PIX_WIDTH, TEST_PIX_HEIGHT);
+		       
+
+	/* pre-touch data */
+	test_argb32_source_argb32();
+
+	do_all_tests("No features");
+
+	twin_feature_init();
+
+	do_all_tests("All features");
+	
+	return 0;
+}