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/**************************************************************************
*
* 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)
{
#if 0
static const float scale = 1.0 / (2.0 * M_PI);
x = x * spu_splats(scale); /* normalize */
return _cos8_v(x);
#else
/* just pass-through to avoid trashing caller's stack */
return x;
#endif
}
static vector float
spu_sin(vector float x)
{
#if 0
static const float scale = 1.0 / (2.0 * M_PI);
x = x * spu_splats(scale); /* normalize */
return _sin8_v(x); /* 8-bit accuracy enough?? */
#else
/* just pass-through to avoid trashing caller's stack */
return x;
#endif
}
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);
}
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