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Diffstat (limited to 'src/gallium/drivers/cell/spu/spu_funcs.c')
-rw-r--r--src/gallium/drivers/cell/spu/spu_funcs.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/gallium/drivers/cell/spu/spu_funcs.c b/src/gallium/drivers/cell/spu/spu_funcs.c
new file mode 100644
index 0000000000..d174956518
--- /dev/null
+++ b/src/gallium/drivers/cell/spu/spu_funcs.c
@@ -0,0 +1,106 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+
+/**
+ * SPU functions accessed by shaders.
+ *
+ * Authors: Brian Paul
+ */
+
+
+#include <string.h>
+#include <libmisc.h>
+#include <cos8_v.h>
+#include <sin8_v.h>
+
+#include "cell/common.h"
+#include "spu_main.h"
+#include "spu_funcs.h"
+
+
+#define M_PI 3.1415926
+
+
+static vector float
+spu_cos(vector float x)
+{
+ static const float scale = 1.0 / (2.0 * M_PI);
+ x = x * spu_splats(scale); /* normalize */
+ return _cos8_v(x);
+}
+
+static vector float
+spu_sin(vector float x)
+{
+ static const float scale = 1.0 / (2.0 * M_PI);
+ x = x * spu_splats(scale); /* normalize */
+ return _sin8_v(x); /* 8-bit accuracy enough?? */
+}
+
+
+static void
+add_func(struct cell_spu_function_info *spu_functions,
+ const char *name, void *addr)
+{
+ uint n = spu_functions->num;
+ ASSERT(strlen(name) < 16);
+ strcpy(spu_functions->names[n], name);
+ spu_functions->addrs[n] = (uint) addr;
+ spu_functions->num++;
+}
+
+
+/**
+ * Return info about the SPU's function to the PPU / main memory.
+ * The PPU needs to know the address of some SPU-side functions so
+ * that we can generate shader code with function calls.
+ */
+void
+return_function_info(void)
+{
+ struct cell_spu_function_info funcs ALIGN16_ATTRIB;
+ int tag = TAG_MISC;
+
+ ASSERT(sizeof(funcs) == 256); /* must be multiple of 16 bytes */
+
+ funcs.num = 0;
+ add_func(&funcs, "spu_cos", &spu_cos);
+ add_func(&funcs, "spu_sin", &spu_sin);
+
+ /* Send the function info back to the PPU / main memory */
+ mfc_put((void *) &funcs, /* src in local store */
+ (unsigned int) spu.init.spu_functions, /* dst in main memory */
+ sizeof(funcs), /* bytes */
+ tag,
+ 0, /* tid */
+ 0 /* rid */);
+ wait_on_mask(1 << tag);
+}
+
+
+