/**************************************************************************
*
* Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
* Copyright 2009-2010 VMware, Inc. 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.
*
**************************************************************************/
#ifndef TGSI_EXEC_H
#define TGSI_EXEC_H
#include "pipe/p_compiler.h"
#include "pipe/p_state.h"
#include "pipe/p_shader_tokens.h"
#if defined __cplusplus
extern "C" {
#endif
#define TGSI_CHAN_X 0
#define TGSI_CHAN_Y 1
#define TGSI_CHAN_Z 2
#define TGSI_CHAN_W 3
#define TGSI_NUM_CHANNELS 4 /* R,G,B,A */
#define TGSI_QUAD_SIZE 4 /* 4 pixel/quad */
#define TGSI_FOR_EACH_CHANNEL( CHAN )\
for (CHAN = 0; CHAN < TGSI_NUM_CHANNELS; CHAN++)
#define TGSI_IS_DST0_CHANNEL_ENABLED( INST, CHAN )\
((INST)->Dst[0].Register.WriteMask & (1 << (CHAN)))
#define TGSI_IF_IS_DST0_CHANNEL_ENABLED( INST, CHAN )\
if (TGSI_IS_DST0_CHANNEL_ENABLED( INST, CHAN ))
#define TGSI_FOR_EACH_DST0_ENABLED_CHANNEL( INST, CHAN )\
TGSI_FOR_EACH_CHANNEL( CHAN )\
TGSI_IF_IS_DST0_CHANNEL_ENABLED( INST, CHAN )
/**
* Registers may be treated as float, signed int or unsigned int.
*/
union tgsi_exec_channel
{
float f[TGSI_QUAD_SIZE];
int i[TGSI_QUAD_SIZE];
unsigned u[TGSI_QUAD_SIZE];
};
/**
* A vector[RGBA] of channels[4 pixels]
*/
struct tgsi_exec_vector
{
union tgsi_exec_channel xyzw[TGSI_NUM_CHANNELS];
};
/**
* For fragment programs, information for computing fragment input
* values from plane equation of the triangle/line.
*/
struct tgsi_interp_coef
{
float a0[TGSI_NUM_CHANNELS]; /* in an xyzw layout */
float dadx[TGSI_NUM_CHANNELS];
float dady[TGSI_NUM_CHANNELS];
};
enum tgsi_sampler_control {
tgsi_sampler_lod_bias,
tgsi_sampler_lod_explicit
};
/**
* Information for sampling textures, which must be implemented
* by code outside the TGSI executor.
*/
struct tgsi_sampler
{
/** Get samples for four fragments in a quad */
void (*get_samples)(struct tgsi_sampler *sampler,
const float s[TGSI_QUAD_SIZE],
const float t[TGSI_QUAD_SIZE],
const float p[TGSI_QUAD_SIZE],
const float c0[TGSI_QUAD_SIZE],
enum tgsi_sampler_control control,
float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
void (*get_dims)(struct tgsi_sampler *sampler, int level,
int dims[4]);
void (*get_texel)(struct tgsi_sampler *sampler, const int i[TGSI_QUAD_SIZE],
const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
};
#define TGSI_EXEC_NUM_TEMPS 128
#define TGSI_EXEC_NUM_IMMEDIATES 256
#define TGSI_EXEC_NUM_TEMP_ARRAYS 8
/*
* Locations of various utility registers (_I = Index, _C = Channel)
*/
#define TGSI_EXEC_TEMP_00000000_I (TGSI_EXEC_NUM_TEMPS + 0)
#define TGSI_EXEC_TEMP_00000000_C 0
#define TGSI_EXEC_TEMP_7FFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
#define TGSI_EXEC_TEMP_7FFFFFFF_C 1
#define TGSI_EXEC_TEMP_80000000_I (TGSI_EXEC_NUM_TEMPS + 0)
#define TGSI_EXEC_TEMP_80000000_C 2
#define TGSI_EXEC_TEMP_FFFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
#define TGSI_EXEC_TEMP_FFFFFFFF_C 3
#define TGSI_EXEC_TEMP_ONE_I (TGSI_EXEC_NUM_TEMPS + 1)
#define TGSI_EXEC_TEMP_ONE_C 0
#define TGSI_EXEC_TEMP_TWO_I (TGSI_EXEC_NUM_TEMPS + 1)
#define TGSI_EXEC_TEMP_TWO_C 1
#define TGSI_EXEC_TEMP_128_I (TGSI_EXEC_NUM_TEMPS + 1)
#define TGSI_EXEC_TEMP_128_C 2
#define TGSI_EXEC_TEMP_MINUS_128_I (TGSI_EXEC_NUM_TEMPS + 1)
#define TGSI_EXEC_TEMP_MINUS_128_C 3
#define TGSI_EXEC_TEMP_KILMASK_I (TGSI_EXEC_NUM_TEMPS + 2)
#define TGSI_EXEC_TEMP_KILMASK_C 0
#define TGSI_EXEC_TEMP_OUTPUT_I (TGSI_EXEC_NUM_TEMPS + 2)
#define TGSI_EXEC_TEMP_OUTPUT_C 1
#define TGSI_EXEC_TEMP_PRIMITIVE_I (TGSI_EXEC_NUM_TEMPS + 2)
#define TGSI_EXEC_TEMP_PRIMITIVE_C 2
#define TGSI_EXEC_TEMP_THREE_I (TGSI_EXEC_NUM_TEMPS + 2)
#define TGSI_EXEC_TEMP_THREE_C 3
#define TGSI_EXEC_TEMP_HALF_I (TGSI_EXEC_NUM_TEMPS + 3)
#define TGSI_EXEC_TEMP_HALF_C 0
/* execution mask, each value is either 0 or ~0 */
#define TGSI_EXEC_MASK_I (TGSI_EXEC_NUM_TEMPS + 3)
#define TGSI_EXEC_MASK_C 1
/* 4 register buffer for various purposes */
#define TGSI_EXEC_TEMP_R0 (TGSI_EXEC_NUM_TEMPS + 4)
#define TGSI_EXEC_NUM_TEMP_R 4
#define TGSI_EXEC_TEMP_ADDR (TGSI_EXEC_NUM_TEMPS + 8)
#define TGSI_EXEC_NUM_ADDRS 1
/* predicate register */
#define TGSI_EXEC_TEMP_P0 (TGSI_EXEC_NUM_TEMPS + 9)
#define TGSI_EXEC_NUM_PREDS 1
#define TGSI_EXEC_NUM_TEMP_EXTRAS 10
#define TGSI_EXEC_MAX_NESTING 32
#define TGSI_EXEC_MAX_COND_NESTING TGSI_EXEC_MAX_NESTING
#define TGSI_EXEC_MAX_LOOP_NESTING TGSI_EXEC_MAX_NESTING
#define TGSI_EXEC_MAX_SWITCH_NESTING TGSI_EXEC_MAX_NESTING
#define TGSI_EXEC_MAX_CALL_NESTING TGSI_EXEC_MAX_NESTING
/* The maximum number of input attributes per vertex. For 2D
* input register files, this is the stride between two 1D
* arrays.
*/
#define TGSI_EXEC_MAX_INPUT_ATTRIBS 17
/* The maximum number of constant vectors per constant buffer.
*/
#define TGSI_EXEC_MAX_CONST_BUFFER 4096
/* The maximum number of vertices per primitive */
#define TGSI_MAX_PRIM_VERTICES 6
/* The maximum number of primitives to be generated */
#define TGSI_MAX_PRIMITIVES 64
/* The maximum total number of vertices */
#define TGSI_MAX_TOTAL_VERTICES (TGSI_MAX_PRIM_VERTICES * TGSI_MAX_PRIMITIVES * PIPE_MAX_ATTRIBS)
#define TGSI_MAX_MISC_INPUTS 8
/** function call/activation record */
struct tgsi_call_record
{
uint CondStackTop;
uint LoopStackTop;
uint ContStackTop;
int SwitchStackTop;
int BreakStackTop;
uint ReturnAddr;
};
/* Switch-case block state. */
struct tgsi_switch_record {
uint mask; /**< execution mask */
union tgsi_exec_channel selector; /**< a value case statements are compared to */
uint defaultMask; /**< non-execute mask for default case */
};
enum tgsi_break_type {
TGSI_EXEC_BREAK_INSIDE_LOOP,
TGSI_EXEC_BREAK_INSIDE_SWITCH
};
#define TGSI_EXEC_MAX_BREAK_STACK (TGSI_EXEC_MAX_LOOP_NESTING + TGSI_EXEC_MAX_SWITCH_NESTING)
/**
* Run-time virtual machine state for executing TGSI shader.
*/
struct tgsi_exec_machine
{
/* Total = program temporaries + internal temporaries
*/
struct tgsi_exec_vector Temps[TGSI_EXEC_NUM_TEMPS +
TGSI_EXEC_NUM_TEMP_EXTRAS];
struct tgsi_exec_vector TempArray[TGSI_EXEC_NUM_TEMP_ARRAYS][TGSI_EXEC_NUM_TEMPS];
float Imms[TGSI_EXEC_NUM_IMMEDIATES][4];
float ImmArray[TGSI_EXEC_NUM_IMMEDIATES][4];
struct tgsi_exec_vector *Inputs;
struct tgsi_exec_vector *Outputs;
/* System values */
unsigned SysSemanticToIndex[TGSI_SEMANTIC_COUNT];
union tgsi_exec_channel SystemValue[TGSI_MAX_MISC_INPUTS];
struct tgsi_exec_vector *Addrs;
struct tgsi_exec_vector *Predicates;
struct tgsi_sampler **Samplers;
unsigned ImmLimit;
const void *Consts[PIPE_MAX_CONSTANT_BUFFERS];
unsigned ConstsSize[PIPE_MAX_CONSTANT_BUFFERS];
const struct tgsi_token *Tokens; /**< Declarations, instructions */
unsigned Processor; /**< TGSI_PROCESSOR_x */
/* GEOMETRY processor only. */
unsigned *Primitives;
unsigned NumOutputs;
unsigned MaxGeometryShaderOutputs;
/* FRAGMENT processor only. */
const struct tgsi_interp_coef *InterpCoefs;
struct tgsi_exec_vector QuadPos;
float Face; /**< +1 if front facing, -1 if back facing */
bool flatshade_color;
/* 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 */
/* Current switch-case state. */
struct tgsi_switch_record Switch;
/* Current break type. */
enum tgsi_break_type BreakType;
/** 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 label stack */
uint LoopLabelStack[TGSI_EXEC_MAX_LOOP_NESTING];
int LoopLabelStackTop;
/** Loop continue mask stack (see comments in tgsi_exec.c) */
uint ContStack[TGSI_EXEC_MAX_LOOP_NESTING];
int ContStackTop;
/** Switch case stack */
struct tgsi_switch_record SwitchStack[TGSI_EXEC_MAX_SWITCH_NESTING];
int SwitchStackTop;
enum tgsi_break_type BreakStack[TGSI_EXEC_MAX_BREAK_STACK];
int BreakStackTop;
/** 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 */
struct tgsi_call_record CallStack[TGSI_EXEC_MAX_CALL_NESTING];
int CallStackTop;
struct tgsi_full_instruction *Instructions;
uint NumInstructions;
struct tgsi_full_declaration *Declarations;
uint NumDeclarations;
struct tgsi_declaration_sampler_view
SamplerViews[PIPE_MAX_SHADER_SAMPLER_VIEWS];
boolean UsedGeometryShader;
};
struct tgsi_exec_machine *
tgsi_exec_machine_create( void );
void
tgsi_exec_machine_destroy(struct tgsi_exec_machine *mach);
void
tgsi_exec_machine_bind_shader(
struct tgsi_exec_machine *mach,
const struct tgsi_token *tokens,
uint numSamplers,
struct tgsi_sampler **samplers);
uint
tgsi_exec_machine_run(
struct tgsi_exec_machine *mach );
void
tgsi_exec_machine_free_data(struct tgsi_exec_machine *mach);
boolean
tgsi_check_soa_dependencies(const struct tgsi_full_instruction *inst);
static INLINE void
tgsi_set_kill_mask(struct tgsi_exec_machine *mach, unsigned mask)
{
mach->Temps[TGSI_EXEC_TEMP_KILMASK_I].xyzw[TGSI_EXEC_TEMP_KILMASK_C].u[0] =
mask;
}
/** Set execution mask values prior to executing the shader */
static INLINE void
tgsi_set_exec_mask(struct tgsi_exec_machine *mach,
boolean ch0, boolean ch1, boolean ch2, boolean ch3)
{
int *mask = mach->Temps[TGSI_EXEC_MASK_I].xyzw[TGSI_EXEC_MASK_C].i;
mask[0] = ch0 ? ~0 : 0;
mask[1] = ch1 ? ~0 : 0;
mask[2] = ch2 ? ~0 : 0;
mask[3] = ch3 ? ~0 : 0;
}
extern void
tgsi_exec_set_constant_buffers(struct tgsi_exec_machine *mach,
unsigned num_bufs,
const void **bufs,
const unsigned *buf_sizes);
static INLINE int
tgsi_exec_get_shader_param(enum pipe_shader_cap param)
{
switch(param) {
case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
return INT_MAX;
case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
return TGSI_EXEC_MAX_NESTING;
case PIPE_SHADER_CAP_MAX_INPUTS:
return TGSI_EXEC_MAX_INPUT_ATTRIBS;
case PIPE_SHADER_CAP_MAX_CONSTS:
return TGSI_EXEC_MAX_CONST_BUFFER;
case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
return PIPE_MAX_CONSTANT_BUFFERS;
case PIPE_SHADER_CAP_MAX_TEMPS:
return TGSI_EXEC_NUM_TEMPS;
case PIPE_SHADER_CAP_MAX_ADDRS:
return TGSI_EXEC_NUM_ADDRS;
case PIPE_SHADER_CAP_MAX_PREDS:
return TGSI_EXEC_NUM_PREDS;
case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
return 1;
case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
return 1;
case PIPE_SHADER_CAP_SUBROUTINES:
return 1;
case PIPE_SHADER_CAP_INTEGERS:
return 1;
case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
return PIPE_MAX_SAMPLERS;
default:
return 0;
}
}
#if defined __cplusplus
} /* extern "C" */
#endif
#endif /* TGSI_EXEC_H */