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Diffstat (limited to 'src/mesa/slang/slang_ir.h')
| -rw-r--r-- | src/mesa/slang/slang_ir.h | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/src/mesa/slang/slang_ir.h b/src/mesa/slang/slang_ir.h new file mode 100644 index 0000000000..166b4e8043 --- /dev/null +++ b/src/mesa/slang/slang_ir.h @@ -0,0 +1,280 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 2005-2008 Brian Paul All Rights Reserved. + * Copyright (C) 2009 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL 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. + */ + +/** + * \file slang_ir.h + * Mesa GLSL Intermediate Representation tree types and constants. + * \author Brian Paul + */ + + +#ifndef SLANG_IR_H +#define SLANG_IR_H + + +#include "main/imports.h" +#include "slang_compile.h" +#include "slang_label.h" +#include "main/mtypes.h" + + +/** + * Intermediate Representation opcodes + */ +typedef enum +{ + IR_NOP = 0, + IR_SEQ, /* sequence (eval left, then right) */ + IR_SCOPE, /* new variable scope (one child) */ + + IR_LABEL, /* target of a jump or cjump */ + + IR_COND, /* conditional expression/predicate */ + + IR_IF, /* high-level IF/then/else */ + /* Children[0] = conditional expression */ + /* Children[1] = if-true part */ + /* Children[2] = if-else part, or NULL */ + + IR_BEGIN_SUB, /* begin subroutine */ + IR_END_SUB, /* end subroutine */ + IR_RETURN, /* return from subroutine */ + IR_CALL, /* call subroutine */ + + IR_LOOP, /* high-level loop-begin / loop-end */ + /* Children[0] = loop body */ + /* Children[1] = loop tail code, or NULL */ + + IR_CONT, /* continue loop */ + /* n->Parent = ptr to parent IR_LOOP Node */ + IR_BREAK, /* break loop */ + + IR_BREAK_IF_TRUE, /**< Children[0] = the condition expression */ + IR_CONT_IF_TRUE, + + IR_COPY, /**< assignment/copy */ + IR_MOVE, /**< assembly MOV instruction */ + + /* vector ops: */ + IR_ADD, /**< assembly ADD instruction */ + IR_SUB, + IR_MUL, + IR_DIV, + IR_DOT4, + IR_DOT3, + IR_DOT2, + IR_NRM4, + IR_NRM3, + IR_CROSS, /* vec3 cross product */ + IR_LRP, + IR_CLAMP, + IR_MIN, + IR_MAX, + IR_CMP, /* = (op0 < 0) ? op1 : op2 */ + IR_SEQUAL, /* Set if args are equal (vector) */ + IR_SNEQUAL, /* Set if args are not equal (vector) */ + IR_SGE, /* Set if greater or equal (vector) */ + IR_SGT, /* Set if greater than (vector) */ + IR_SLE, /* Set if less or equal (vector) */ + IR_SLT, /* Set if less than (vector) */ + IR_POW, /* x^y */ + IR_EXP, /* e^x */ + IR_EXP2, /* 2^x */ + IR_LOG2, /* log base 2 */ + IR_RSQ, /* 1/sqrt() */ + IR_RCP, /* reciprocol */ + IR_FLOOR, + IR_FRAC, + IR_ABS, /* absolute value */ + IR_NEG, /* negate */ + IR_DDX, /* derivative w.r.t. X */ + IR_DDY, /* derivative w.r.t. Y */ + IR_SIN, /* sine */ + IR_COS, /* cosine */ + IR_NOISE1, /* noise(x) */ + IR_NOISE2, /* noise(x, y) */ + IR_NOISE3, /* noise(x, y, z) */ + IR_NOISE4, /* noise(x, y, z, w) */ + + IR_EQUAL, /* boolean equality */ + IR_NOTEQUAL,/* boolean inequality */ + IR_NOT, /* boolean not */ + + IR_VAR, /* variable reference */ + IR_VAR_DECL,/* var declaration */ + + IR_ELEMENT, /* array element */ + IR_FIELD, /* struct field */ + IR_SWIZZLE, /* swizzled storage access */ + + IR_TEX, /* texture lookup */ + IR_TEXB, /* texture lookup with LOD bias */ + IR_TEXP, /* texture lookup with projection */ + + IR_TEX_SH, /* texture lookup, shadow compare */ + IR_TEXB_SH, /* texture lookup with LOD bias, shadow compare */ + IR_TEXP_SH, /* texture lookup with projection, shadow compare */ + + IR_FLOAT, + IR_I_TO_F, /* int[4] to float[4] conversion */ + IR_F_TO_I, /* float[4] to int[4] conversion */ + + IR_KILL /* fragment kill/discard */ +} slang_ir_opcode; + + +/** + * Describes where data/variables are stored in the various register files. + * + * In the simple case, the File, Index and Size fields indicate where + * a variable is stored. For example, a vec3 variable may be stored + * as (File=PROGRAM_TEMPORARY, Index=6, Size=3). Or, File[Index]. + * Or, a program input like color may be stored as + * (File=PROGRAM_INPUT,Index=3,Size=4); + * + * For single-float values, the Swizzle field indicates which component + * of the vector contains the float. + * + * If IsIndirect is set, the storage is accessed through an indirect + * register lookup. The value in question will be located at: + * File[Index + IndirectFile[IndirectIndex]] + * + * This is primary used for indexing arrays. For example, consider this + * GLSL code: + * uniform int i; + * float a[10]; + * float x = a[i]; + * + * here, storage for a[i] would be described by (File=PROGRAM_TEMPORAY, + * Index=aPos, IndirectFile=PROGRAM_UNIFORM, IndirectIndex=iPos), which + * would mean TEMP[aPos + UNIFORM[iPos]] + */ +struct slang_ir_storage_ +{ + gl_register_file File; /**< PROGRAM_TEMPORARY, PROGRAM_INPUT, etc */ + GLint Index; /**< -1 means unallocated */ + GLint Size; /**< number of floats or ints */ + GLuint Swizzle; /**< Swizzle AND writemask info */ + GLint RefCount; /**< Used during IR tree delete */ + + GLboolean RelAddr; /* we'll remove this eventually */ + + GLboolean IsIndirect; + gl_register_file IndirectFile; + GLint IndirectIndex; + GLuint IndirectSwizzle; + GLuint TexTarget; /**< If File==PROGRAM_SAMPLER, one of TEXTURE_x_INDEX */ + + /** If Parent is non-null, Index is relative to parent. + * The other fields are ignored. + */ + struct slang_ir_storage_ *Parent; +}; + +typedef struct slang_ir_storage_ slang_ir_storage; + + +/** + * Intermediate Representation (IR) tree node + * Basically a binary tree, but IR_LRP and IR_CLAMP have three children. + */ +typedef struct slang_ir_node_ +{ + slang_ir_opcode Opcode; + struct slang_ir_node_ *Children[3]; + slang_ir_storage *Store; /**< location of result of this operation */ + GLint InstLocation; /**< Location of instruction emitted for this node */ + + /** special fields depending on Opcode: */ + const char *Field; /**< If Opcode == IR_FIELD */ + GLfloat Value[4]; /**< If Opcode == IR_FLOAT */ + slang_variable *Var; /**< If Opcode == IR_VAR or IR_VAR_DECL */ + struct slang_ir_node_ *List; /**< For various linked lists */ + struct slang_ir_node_ *Parent; /**< Pointer to logical parent (ie. loop) */ + slang_label *Label; /**< Used for branches */ + const char *Comment; /**< If Opcode == IR_COMMENT */ +} slang_ir_node; + + + +/** + * Assembly and IR info + */ +typedef struct +{ + slang_ir_opcode IrOpcode; + const char *IrName; + gl_inst_opcode InstOpcode; + GLuint ResultSize, NumParams; +} slang_ir_info; + + + +extern const slang_ir_info * +_slang_ir_info(slang_ir_opcode opcode); + + +extern void +_slang_init_ir_storage(slang_ir_storage *st, + gl_register_file file, GLint index, GLint size, + GLuint swizzle); + +extern slang_ir_storage * +_slang_new_ir_storage(gl_register_file file, GLint index, GLint size); + + +extern slang_ir_storage * +_slang_new_ir_storage_swz(gl_register_file file, GLint index, GLint size, + GLuint swizzle); + +extern slang_ir_storage * +_slang_new_ir_storage_relative(GLint index, GLint size, + slang_ir_storage *parent); + + +extern slang_ir_storage * +_slang_new_ir_storage_indirect(gl_register_file file, + GLint index, + GLint size, + gl_register_file indirectFile, + GLint indirectIndex, + GLuint indirectSwizzle); + +extern slang_ir_storage * +_slang_new_ir_storage_sampler(GLint sampNum, GLuint texTarget, GLint size); + + +extern void +_slang_copy_ir_storage(slang_ir_storage *dst, const slang_ir_storage *src); + + +extern void +_slang_free_ir_tree(slang_ir_node *n); + + +extern void +_slang_print_ir_tree(const slang_ir_node *n, int indent); + + +#endif /* SLANG_IR_H */ |