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/**************************************************************************
*
* Copyright 2007 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.
*
**************************************************************************/
#if !defined SPU_EXEC_H
#define SPU_EXEC_H
#include "pipe/p_compiler.h"
#include "tgsi/tgsi_exec.h"
#if defined __cplusplus
extern "C" {
#endif
/**
* Registers may be treated as float, signed int or unsigned int.
*/
union spu_exec_channel
{
float f[QUAD_SIZE];
int i[QUAD_SIZE];
unsigned u[QUAD_SIZE];
qword q;
};
/**
* A vector[RGBA] of channels[4 pixels]
*/
struct spu_exec_vector
{
union spu_exec_channel xyzw[NUM_CHANNELS];
};
/**
* For fragment programs, information for computing fragment input
* values from plane equation of the triangle/line.
*/
struct spu_interp_coef
{
float a0[NUM_CHANNELS]; /* in an xyzw layout */
float dadx[NUM_CHANNELS];
float dady[NUM_CHANNELS];
};
struct softpipe_tile_cache; /**< Opaque to TGSI */
/**
* Information for sampling textures, which must be implemented
* by code outside the TGSI executor.
*/
struct spu_sampler
{
const struct pipe_sampler_state *state;
struct pipe_resource *texture;
/** Get samples for four fragments in a quad */
void (*get_samples)(struct spu_sampler *sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
float lodbias,
float rgba[NUM_CHANNELS][QUAD_SIZE]);
void *pipe; /*XXX temporary*/
struct softpipe_tile_cache *cache;
};
/**
* Run-time virtual machine state for executing TGSI shader.
*/
struct spu_exec_machine
{
/*
* 32 program temporaries
* 4 internal temporaries
* 1 address
*/
PIPE_ALIGN_VAR(16)
struct spu_exec_vector Temps[TGSI_EXEC_NUM_TEMPS
+ TGSI_EXEC_NUM_TEMP_EXTRAS + 1];
struct spu_exec_vector *Addrs;
struct spu_sampler *Samplers;
float Imms[TGSI_EXEC_NUM_IMMEDIATES][4];
unsigned ImmLimit;
float (*Consts)[4];
struct spu_exec_vector *Inputs;
struct spu_exec_vector *Outputs;
unsigned Processor;
/* GEOMETRY processor only. */
unsigned *Primitives;
/* FRAGMENT processor only. */
const struct spu_interp_coef *InterpCoefs;
struct spu_exec_vector QuadPos;
/* Conditional execution masks */
uint CondMask; /**< For IF/ELSE/ENDIF */
uint LoopMask; /**< For BGNLOOP/ENDLOOP */
uint ContMask; /**< For loop CONT statements */
uint FuncMask; /**< For function calls */
uint ExecMask; /**< = CondMask & LoopMask */
/** Condition mask stack (for nested conditionals) */
uint CondStack[TGSI_EXEC_MAX_COND_NESTING];
int CondStackTop;
/** Loop mask stack (for nested loops) */
uint LoopStack[TGSI_EXEC_MAX_LOOP_NESTING];
int LoopStackTop;
/** Loop continue mask stack (see comments in tgsi_exec.c) */
uint ContStack[TGSI_EXEC_MAX_LOOP_NESTING];
int ContStackTop;
/** Function execution mask stack (for executing subroutine code) */
uint FuncStack[TGSI_EXEC_MAX_CALL_NESTING];
int FuncStackTop;
/** Function call stack for saving/restoring the program counter */
uint CallStack[TGSI_EXEC_MAX_CALL_NESTING];
int CallStackTop;
struct tgsi_full_instruction *Instructions;
uint NumInstructions;
struct tgsi_full_declaration *Declarations;
uint NumDeclarations;
};
extern void
spu_exec_machine_init(struct spu_exec_machine *mach,
uint numSamplers,
struct spu_sampler *samplers,
unsigned processor);
extern uint
spu_exec_machine_run( struct spu_exec_machine *mach );
#if defined __cplusplus
} /* extern "C" */
#endif
#endif /* SPU_EXEC_H */
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