src/gallium/drivers/cell/spu/spu_funcs.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * SPU functions accessed by shaders.
  31  *
  32  * Authors: Brian Paul
  33  */
  34
  35
  36 #include <string.h>
  37 #include <libmisc.h>
  38 #include <math.h>
  39 #include <cos14_v.h>
  40 #include <sin14_v.h>
  41 #include <simdmath/exp2f4.h>
  42 #include <simdmath/log2f4.h>
  43 #include <simdmath/powf4.h>
  44
  45 #include "cell/common.h"
  46 #include "spu_main.h"
  47 #include "spu_funcs.h"
  48 #include "spu_texture.h"
  49
  50
  51 /** For "return"-ing four vectors */
  52 struct vec_4x4
  53 {
  54    vector float v[4];
  55 };
  56
  57
  58 static vector float
  59 spu_cos(vector float x)
  60 {
  61    return _cos14_v(x);
  62 }
  63
  64 static vector float
  65 spu_sin(vector float x)
  66 {
  67    return _sin14_v(x);
  68 }
  69
  70 static vector float
  71 spu_pow(vector float x, vector float y)
  72 {
  73    return _powf4(x, y);
  74 }
  75
  76 static vector float
  77 spu_exp2(vector float x)
  78 {
  79    return _exp2f4(x);
  80 }
  81
  82 static vector float
  83 spu_log2(vector float x)
  84 {
  85    return _log2f4(x);
  86 }
  87
  88
  89 static struct vec_4x4
  90 spu_tex_2d(vector float s, vector float t, vector float r, vector float q,
  91            unsigned unit)
  92 {
  93    struct vec_4x4 colors;
  94    (void) r;
  95    (void) q;
  96    spu.sample_texture_2d[unit](s, t, unit, 0, 0, colors.v);
  97    return colors;
  98 }
  99
 100 static struct vec_4x4
 101 spu_tex_3d(vector float s, vector float t, vector float r, vector float q,
 102            unsigned unit)
 103 {
 104    struct vec_4x4 colors;
 105    (void) r;
 106    (void) q;
 107    spu.sample_texture_2d[unit](s, t, unit, 0, 0, colors.v);
 108    return colors;
 109 }
 110
 111 static struct vec_4x4
 112 spu_tex_cube(vector float s, vector float t, vector float r, vector float q,
 113            unsigned unit)
 114 {
 115    struct vec_4x4 colors;
 116    (void) q;
 117    sample_texture_cube(s, t, r, unit, colors.v);
 118    return colors;
 119 }
 120
 121
 122 /**
 123  * Add named function to list of "exported" functions that will be
 124  * made available to the PPU-hosted code generator.
 125  */
 126 static void
 127 export_func(struct cell_spu_function_info *spu_functions,
 128             const char *name, void *addr)
 129 {
 130    uint n = spu_functions->num;
 131    ASSERT(strlen(name) < 16);
 132    strcpy(spu_functions->names[n], name);
 133    spu_functions->addrs[n] = (uint) addr;
 134    spu_functions->num++;
 135    ASSERT(spu_functions->num <= 16);
 136 }
 137
 138
 139 /**
 140  * Return info about the SPU's function to the PPU / main memory.
 141  * The PPU needs to know the address of some SPU-side functions so
 142  * that we can generate shader code with function calls.
 143  */
 144 void
 145 return_function_info(void)
 146 {
 147    struct cell_spu_function_info funcs ALIGN16_ATTRIB;
 148    int tag = TAG_MISC;
 149
 150    ASSERT(sizeof(funcs) == 256); /* must be multiple of 16 bytes */
 151
 152    funcs.num = 0;
 153    export_func(&funcs, "spu_cos", &spu_cos);
 154    export_func(&funcs, "spu_sin", &spu_sin);
 155    export_func(&funcs, "spu_pow", &spu_pow);
 156    export_func(&funcs, "spu_exp2", &spu_exp2);
 157    export_func(&funcs, "spu_log2", &spu_log2);
 158    export_func(&funcs, "spu_tex_2d", &spu_tex_2d);
 159    export_func(&funcs, "spu_tex_3d", &spu_tex_3d);
 160    export_func(&funcs, "spu_tex_cube", &spu_tex_cube);
 161
 162    /* Send the function info back to the PPU / main memory */
 163    mfc_put((void *) &funcs,  /* src in local store */
 164            (unsigned int) spu.init.spu_functions, /* dst in main memory */
 165            sizeof(funcs),  /* bytes */
 166            tag,
 167            0, /* tid */
 168            0  /* rid */);
 169    wait_on_mask(1 << tag);
 170 }
 171
 172
 173