Initial commit

Add sources for etna-gpu-tools

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

1 files changed, 110 insertions, 0 deletions

diff --git a/detile/viv-demultitile.c b/detile/viv-demultitile.c
new file mode 100644
index 0000000..1162bef
--- /dev/null
+++ b/detile/viv-demultitile.c
@@ -0,0 +1,110 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+static void detile_gen(void *dst, void *src, unsigned int unit_size,
+	unsigned int tile_width, unsigned int tile_height,
+	unsigned int blocks_x, unsigned int blocks_y)
+{
+	unsigned int major_x, minor_x, major_y, minor_y;
+	unsigned int tile_size = tile_width * tile_height;
+	unsigned int tile_stride = tile_size * blocks_x;
+	unsigned int src_p, dst_p;
+
+	for (major_y = 0; major_y < blocks_y; major_y++) {
+		for (minor_y = 0; minor_y < tile_height; minor_y++) {
+			unsigned int dst_y = major_y * tile_height + minor_y;
+
+			for (major_x = 0; major_x < blocks_x; major_x++) {
+				for (minor_x = 0; minor_x < tile_width; minor_x++) {
+					unsigned int dst_x = major_x * tile_width + minor_x;
+					unsigned int src_maj = major_y * tile_stride + major_x * tile_size;
+					unsigned int src_min = minor_y * tile_width + minor_x;
+
+					dst_p = (dst_y * tile_width * blocks_x + dst_x) * unit_size;
+					src_p = (src_maj + src_min) * unit_size;
+					memcpy(dst + dst_p, src + src_p, unit_size);
+				}
+			}
+		}
+	}
+}
+
+static void demultitile(void *dst, void *src, unsigned ps, unsigned w, unsigned h)
+{
+	void *tmp = malloc(ps * w * h);
+	void *src_u, *src_l;
+	unsigned int tile_bytes;
+	unsigned int tile_stride;
+	unsigned int tile_w = w / 4;
+	unsigned int tile_h = h / 4;
+	int x, y;
+
+	/*
+	 * u1 u2 l1 l2 u5 u6 l5 l6
+	 * l3 l4 u3 u4 l7 l8 u7 u8
+	 */
+
+	tile_bytes = ps * 4 * 4; /* each 4x4 tile */
+	tile_stride = tile_bytes * tile_w; /* one full row of tiles */
+
+	src_u = src;
+	src_l = src + tile_stride * tile_h / 2;
+
+	fprintf(stderr, "tile bytes = 0x%x\n", tile_bytes);
+	fprintf(stderr, "tile stride = 0x%x\n", tile_stride);
+	fprintf(stderr, "u -> l = 0x%x\n", src_l - src_u);
+
+	for (y = 0; y < tile_h / 2; y++) {
+		void *dpyu = tmp + y * 2 * tile_stride;
+		void *dpyl = dpyu + tile_stride;
+		void *spyu = src_u + y * tile_stride; /* upper half */
+		void *spyl = src_l + y * tile_stride; /* lower half */
+		for (x = 0; x < tile_w / 4; x++) {
+			void *dpu = dpyu + x * 4 * tile_bytes;
+			void *dpl = dpyl + x * 4 * tile_bytes;
+			void *spu = spyu + x * 4 * tile_bytes;
+			void *spl = spyl + x * 4 * tile_bytes;
+
+			memcpy(dpu, spu, 2 * tile_bytes);
+			memcpy(dpu + 2 * tile_bytes, spl, 2 * tile_bytes);
+			memcpy(dpl, spl + 2 * tile_bytes, 2 * tile_bytes);
+			memcpy(dpl + 2 * tile_bytes, spu + 2 * tile_bytes, 2 * tile_bytes);
+		}
+	}
+
+	detile_gen(dst, tmp, ps, 4, 4, tile_w, tile_h);
+	free(tmp);
+}
+
+static void detile(void *dst, void *src, unsigned ps, unsigned w, unsigned h)
+{
+	detile_gen(dst, src, ps, 4, 4, w / 4, h / 4);
+}
+
+int main(int argc, char *argv[])
+{
+	struct stat st;
+	void *ptr, *out;
+
+	if (fstat(0, &st) == -1) {
+		perror("failed to stat");
+		return 1;
+	}
+
+	ptr = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, 0, 0);
+	if (ptr == (void *)-1) {
+		perror("failed to mmap");
+		return 1;
+	}
+
+	out = malloc(st.st_size);
+
+	demultitile(out, ptr, 4, 256, 256);
+
+	write(1, out, st.st_size);
+	return 0;
+}