src/gallium/drivers/softpipe/sp_fs_sse.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "sp_context.h"
  30 #include "sp_state.h"
  31 #include "sp_fs.h"
  32 #include "sp_headers.h"
  33
  34
  35 #include "pipe/p_state.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_util.h"
  38 #include "pipe/p_inlines.h"
  39 #include "tgsi/exec/tgsi_exec.h"
  40 #include "tgsi/exec/tgsi_sse2.h"
  41
  42
  43 #if defined(__i386__) || defined(__386__)
  44
  45 #include "x86/rtasm/x86sse.h"
  46
  47 /* Surely this should be defined somewhere in a tgsi header:
  48  */
  49 typedef void (XSTDCALL *codegen_function)(
  50    const struct tgsi_exec_vector *input,
  51    struct tgsi_exec_vector *output,
  52    float (*constant)[4],
  53    struct tgsi_exec_vector *temporary,
  54    const struct tgsi_interp_coef *coef
  55    //, const struct tgsi_exec_vector *quadPos
  56  );
  57
  58
  59 struct sp_sse_fragment_shader {
  60    struct sp_fragment_shader base;
  61    struct x86_function             sse2_program;
  62    codegen_function func;
  63 };
  64
  65
  66 /**
  67  * Compute quad X,Y,Z,W for the four fragments in a quad.
  68  *
  69  * This should really be part of the compiled shader.
  70  */
  71 void
  72 sp_setup_pos_vector(const struct tgsi_interp_coef *coef,
  73                     float x, float y,
  74                     struct tgsi_exec_vector *quadpos)
  75 {
  76    uint chan;
  77    /* do X */
  78    quadpos->xyzw[0].f[0] = x;
  79    quadpos->xyzw[0].f[1] = x + 1;
  80    quadpos->xyzw[0].f[2] = x;
  81    quadpos->xyzw[0].f[3] = x + 1;
  82
  83    /* do Y */
  84    quadpos->xyzw[1].f[0] = y;
  85    quadpos->xyzw[1].f[1] = y;
  86    quadpos->xyzw[1].f[2] = y + 1;
  87    quadpos->xyzw[1].f[3] = y + 1;
  88
  89    /* do Z and W for all fragments in the quad */
  90    for (chan = 2; chan < 4; chan++) {
  91       const float dadx = coef->dadx[chan];
  92       const float dady = coef->dady[chan];
  93       const float a0 = coef->a0[chan] + dadx * x + dady * y;
  94       quadpos->xyzw[chan].f[0] = a0;
  95       quadpos->xyzw[chan].f[1] = a0 + dadx;
  96       quadpos->xyzw[chan].f[2] = a0 + dady;
  97       quadpos->xyzw[chan].f[3] = a0 + dadx + dady;
  98    }
  99 }
 100
 101
 102 static void
 103 fs_sse_prepare( struct sp_fragment_shader *base,
 104               struct tgsi_exec_machine *machine,
 105               struct tgsi_sampler *samplers )
 106 {
 107 }
 108
 109
 110 /* TODO: codegenerate the whole run function, skip this wrapper.
 111  * TODO: break dependency on tgsi_exec_machine struct
 112  * TODO: push Position calculation into the generated shader
 113  * TODO: process >1 quad at a time
 114  */
 115 static unsigned
 116 fs_sse_run( struct sp_fragment_shader *base,
 117          struct tgsi_exec_machine *machine,
 118          struct quad_header *quad )
 119 {
 120    struct sp_sse_fragment_shader *shader = (struct sp_sse_fragment_shader *) base;
 121
 122    /* Compute X, Y, Z, W vals for this quad -- place in temp[0] for now */
 123    sp_setup_pos_vector(quad->posCoef,
 124                        (float)quad->x0, (float)quad->y0,
 125                        machine->Temps);
 126
 127    shader->func( machine->Inputs,
 128                  machine->Outputs,
 129                  machine->Consts,
 130                  machine->Temps,
 131                  machine->InterpCoefs
 132                  //      , &machine->QuadPos
 133       );
 134
 135    return ~(machine->Temps[TGSI_EXEC_TEMP_KILMASK_I].xyzw[TGSI_EXEC_TEMP_KILMASK_C].u[0]);
 136 }
 137
 138
 139 static void
 140 fs_sse_delete( struct sp_fragment_shader *base )
 141 {
 142    struct sp_sse_fragment_shader *shader = (struct sp_sse_fragment_shader *) base;
 143
 144    x86_release_func( &shader->sse2_program );
 145    FREE(shader);
 146 }
 147
 148
 149 struct sp_fragment_shader *
 150 softpipe_create_fs_sse(struct softpipe_context *softpipe,
 151                        const struct pipe_shader_state *templ)
 152 {
 153    struct sp_sse_fragment_shader *shader;
 154
 155    if (!softpipe->use_sse)
 156       return NULL;
 157
 158    shader = CALLOC_STRUCT(sp_sse_fragment_shader);
 159    if (!shader)
 160       return NULL;
 161
 162    x86_init_func( &shader->sse2_program );
 163
 164    if (!tgsi_emit_sse2_fs( templ->tokens, &shader->sse2_program )) {
 165       FREE(shader);
 166       return NULL;
 167    }
 168
 169    shader->func = (codegen_function) x86_get_func( &shader->sse2_program );
 170    assert(shader->func);
 171
 172    shader->base.shader = *templ;
 173    shader->base.prepare = fs_sse_prepare;
 174    shader->base.run = fs_sse_run;
 175    shader->base.delete = fs_sse_delete;
 176
 177    return &shader->base;
 178 }
 179
 180
 181 #else
 182
 183 /* Maybe put this varient in the header file.
 184  */
 185 struct sp_fragment_shader *
 186 softpipe_create_fs_sse(struct softpipe_context *softpipe,
 187                        const struct pipe_shader_state *templ)
 188 {
 189    return NULL;
 190 }
 191
 192 #endif