diff options
Diffstat (limited to 'src/mesa/shader')
| -rw-r--r-- | src/mesa/shader/prog_parameter.c | 33 | ||||
| -rw-r--r-- | src/mesa/shader/prog_parameter.h | 10 | ||||
| -rw-r--r-- | src/mesa/shader/program.c | 149 | ||||
| -rw-r--r-- | src/mesa/shader/program.h | 8 | ||||
| -rw-r--r-- | src/mesa/shader/programopt.c | 96 | ||||
| -rw-r--r-- | src/mesa/shader/programopt.h | 2 |
6 files changed, 296 insertions, 2 deletions
diff --git a/src/mesa/shader/prog_parameter.c b/src/mesa/shader/prog_parameter.c index 3ad7215755d..500cfbbd873 100644 --- a/src/mesa/shader/prog_parameter.c +++ b/src/mesa/shader/prog_parameter.c @@ -604,6 +604,39 @@ _mesa_clone_parameter_list(const struct gl_program_parameter_list *list) /** + * Return a new parameter list which is listA + listB. + */ +struct gl_program_parameter_list * +_mesa_combine_parameter_lists(const struct gl_program_parameter_list *listA, + const struct gl_program_parameter_list *listB) +{ + struct gl_program_parameter_list *list; + + if (listA) { + list = _mesa_clone_parameter_list(listA); + if (list && listB) { + GLuint i; + for (i = 0; i < listB->NumParameters; i++) { + struct gl_program_parameter *param = listB->Parameters + i; + _mesa_add_parameter(list, param->Type, param->Name, param->Size, + param->DataType, + listB->ParameterValues[i], + param->StateIndexes); + } + } + } + else if (listB) { + list = _mesa_clone_parameter_list(listB); + } + else { + list = NULL; + } + return list; +} + + + +/** * Find longest name of all uniform parameters in list. */ GLuint diff --git a/src/mesa/shader/prog_parameter.h b/src/mesa/shader/prog_parameter.h index 09ff851ea73..105f6f24deb 100644 --- a/src/mesa/shader/prog_parameter.h +++ b/src/mesa/shader/prog_parameter.h @@ -78,6 +78,16 @@ _mesa_free_parameter_list(struct gl_program_parameter_list *paramList); extern struct gl_program_parameter_list * _mesa_clone_parameter_list(const struct gl_program_parameter_list *list); +extern struct gl_program_parameter_list * +_mesa_combine_parameter_lists(const struct gl_program_parameter_list *a, + const struct gl_program_parameter_list *b); + +static INLINE GLuint +_mesa_num_parameters(const struct gl_program_parameter_list *list) +{ + return list ? list->NumParameters : 0; +} + extern GLint _mesa_add_parameter(struct gl_program_parameter_list *paramList, enum register_file type, const char *name, diff --git a/src/mesa/shader/program.c b/src/mesa/shader/program.c index 92aa6ee44a3..14e401e5716 100644 --- a/src/mesa/shader/program.c +++ b/src/mesa/shader/program.c @@ -527,6 +527,155 @@ _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count) /** + * Search instructions for registers that match (oldFile, oldIndex), + * replacing them with (newFile, newIndex). + */ +static void +replace_registers(struct prog_instruction *inst, GLuint numInst, + GLuint oldFile, GLuint oldIndex, + GLuint newFile, GLuint newIndex) +{ + GLuint i, j; + for (i = 0; i < numInst; i++) { + for (j = 0; j < _mesa_num_inst_src_regs(inst->Opcode); j++) { + if (inst[i].SrcReg[j].File == oldFile && + inst[i].SrcReg[j].Index == oldIndex) { + inst[i].SrcReg[j].File = newFile; + inst[i].SrcReg[j].Index = newIndex; + } + } + } +} + + +/** + * Search instructions for references to program parameters. When found, + * increment the parameter index by 'offset'. + * Used when combining programs. + */ +static void +adjust_param_indexes(struct prog_instruction *inst, GLuint numInst, + GLuint offset) +{ + GLuint i, j; + for (i = 0; i < numInst; i++) { + for (j = 0; j < _mesa_num_inst_src_regs(inst->Opcode); j++) { + GLuint f = inst[i].SrcReg[j].File; + if (f == PROGRAM_CONSTANT || + f == PROGRAM_UNIFORM || + f == PROGRAM_STATE_VAR) { + inst[i].SrcReg[j].Index += offset; + } + } + } +} + + +/** + * Combine two programs into one. Fix instructions so the outputs of + * the first program go to the inputs of the second program. + */ +struct gl_program * +_mesa_combine_programs(GLcontext *ctx, + struct gl_program *progA, struct gl_program *progB) +{ + struct prog_instruction *newInst; + struct gl_program *newProg; + const GLuint lenA = progA->NumInstructions - 1; /* omit END instr */ + const GLuint lenB = progB->NumInstructions; + const GLuint numParamsA = _mesa_num_parameters(progA->Parameters); + const GLuint newLength = lenA + lenB; + GLuint i; + + ASSERT(progA->Target == progB->Target); + + newInst = _mesa_alloc_instructions(newLength); + if (!newInst) + return GL_FALSE; + + _mesa_copy_instructions(newInst, progA->Instructions, lenA); + _mesa_copy_instructions(newInst + lenA, progB->Instructions, lenB); + + /* adjust branch / instruction addresses for B's instructions */ + for (i = 0; i < lenB; i++) { + newInst[lenA + i].BranchTarget += lenA; + } + + newProg = ctx->Driver.NewProgram(ctx, progA->Target, 0); + newProg->Instructions = newInst; + newProg->NumInstructions = newLength; + + if (newProg->Target == GL_FRAGMENT_PROGRAM_ARB) { + /* connect color outputs/inputs */ + if ((progA->OutputsWritten & (1 << FRAG_RESULT_COLR)) && + (progB->InputsRead & (1 << FRAG_ATTRIB_COL0))) { + replace_registers(newInst + lenA, lenB, + PROGRAM_INPUT, FRAG_ATTRIB_COL0, + PROGRAM_OUTPUT, FRAG_RESULT_COLR); + } + + newProg->InputsRead = progA->InputsRead; + newProg->InputsRead |= (progB->InputsRead & ~(1 << FRAG_ATTRIB_COL0)); + newProg->OutputsWritten = progB->OutputsWritten; + } + else { + /* vertex program */ + assert(0); /* XXX todo */ + } + + /* + * Merge parameters (uniforms, constants, etc) + */ + newProg->Parameters = _mesa_combine_parameter_lists(progA->Parameters, + progB->Parameters); + + adjust_param_indexes(newInst + lenA, lenB, numParamsA); + + + return newProg; +} + + + + +/** + * Scan the given program to find a free register of the given type. + * \param regFile - PROGRAM_INPUT, PROGRAM_OUTPUT or PROGRAM_TEMPORARY + */ +GLint +_mesa_find_free_register(const struct gl_program *prog, GLuint regFile) +{ + GLboolean used[MAX_PROGRAM_TEMPS]; + GLuint i, k; + + assert(regFile == PROGRAM_INPUT || + regFile == PROGRAM_OUTPUT || + regFile == PROGRAM_TEMPORARY); + + _mesa_memset(used, 0, sizeof(used)); + + for (i = 0; i < prog->NumInstructions; i++) { + const struct prog_instruction *inst = prog->Instructions + i; + const GLuint n = _mesa_num_inst_src_regs(inst->Opcode); + + for (k = 0; k < n; k++) { + if (inst->SrcReg[k].File == regFile) { + used[inst->SrcReg[k].Index] = GL_TRUE; + } + } + } + + for (i = 0; i < MAX_PROGRAM_TEMPS; i++) { + if (!used[i]) + return i; + } + + return -1; +} + + + +/** * Mixing ARB and NV vertex/fragment programs can be tricky. * Note: GL_VERTEX_PROGRAM_ARB == GL_VERTEX_PROGRAM_NV * but, GL_FRAGMENT_PROGRAM_ARB != GL_FRAGMENT_PROGRAM_NV diff --git a/src/mesa/shader/program.h b/src/mesa/shader/program.h index c5d36c78a03..0f0d6060a9e 100644 --- a/src/mesa/shader/program.h +++ b/src/mesa/shader/program.h @@ -115,6 +115,14 @@ _mesa_clone_program(GLcontext *ctx, const struct gl_program *prog); extern GLboolean _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count); +extern struct gl_program * +_mesa_combine_programs(GLcontext *ctx, + struct gl_program *progA, struct gl_program *progB); + +extern GLint +_mesa_find_free_register(const struct gl_program *prog, GLuint regFile); + + /* * API functions common to ARB/NV_vertex/fragment_program */ diff --git a/src/mesa/shader/programopt.c b/src/mesa/shader/programopt.c index fc5b0497fe3..e6f065a33b8 100644 --- a/src/mesa/shader/programopt.c +++ b/src/mesa/shader/programopt.c @@ -35,6 +35,7 @@ #include "context.h" #include "prog_parameter.h" #include "prog_statevars.h" +#include "program.h" #include "programopt.h" #include "prog_instruction.h" @@ -102,7 +103,7 @@ _mesa_insert_mvp_code(GLcontext *ctx, struct gl_vertex_program *vprog) _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen); /* free old instructions */ - _mesa_free(vprog->Base.Instructions); + _mesa_free_instructions(vprog->Base.Instructions, origLen); /* install new instructions */ vprog->Base.Instructions = newInst; @@ -275,7 +276,7 @@ _mesa_append_fog_code(GLcontext *ctx, struct gl_fragment_program *fprog) inst++; /* free old instructions */ - _mesa_free(fprog->Base.Instructions); + _mesa_free_instructions(fprog->Base.Instructions, origLen); /* install new instructions */ fprog->Base.Instructions = newInst; @@ -365,3 +366,94 @@ _mesa_count_texture_instructions(struct gl_program *prog) } } + +/** + * Scan/rewrite program to remove reads of varying (output) registers. + * In GLSL vertex shaders, varying vars can be read and written. + * Normally, vertex varying vars are implemented as output registers. + * On some hardware, trying to read an output register causes trouble. + * So, rewrite the program to use a temporary register in this case. + */ +void +_mesa_remove_varying_reads(struct gl_program *prog) +{ + GLuint i; + GLint outputMap[VERT_RESULT_MAX]; + GLuint numVaryingReads = 0; + + assert(prog->Target == GL_VERTEX_PROGRAM_ARB); + + for (i = 0; i < VERT_RESULT_MAX; i++) + outputMap[i] = -1; + + /* look for instructions which read from varying vars */ + for (i = 0; i < prog->NumInstructions; i++) { + struct prog_instruction *inst = prog->Instructions + i; + const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode); + GLuint j; + for (j = 0; j < numSrc; j++) { + if (inst->SrcReg[j].File == PROGRAM_VARYING) { + /* replace the read with a temp reg */ + const GLuint var = inst->SrcReg[j].Index; + if (outputMap[var] == -1) { + numVaryingReads++; + outputMap[var] = _mesa_find_free_register(prog, + PROGRAM_TEMPORARY); + } + inst->SrcReg[j].File = PROGRAM_TEMPORARY; + inst->SrcReg[j].Index = outputMap[var]; + } + } + } + + if (numVaryingReads == 0) + return; /* nothing to be done */ + + /* look for instructions which write to the varying vars identified above */ + for (i = 0; i < prog->NumInstructions; i++) { + struct prog_instruction *inst = prog->Instructions + i; + const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode); + GLuint j; + for (j = 0; j < numSrc; j++) { + if (inst->DstReg.File == PROGRAM_VARYING && + outputMap[inst->DstReg.Index] >= 0) { + /* change inst to write to the temp reg, instead of the varying */ + inst->DstReg.File = PROGRAM_TEMPORARY; + inst->DstReg.Index = outputMap[inst->DstReg.Index]; + } + } + } + + /* insert new instructions to copy the temp vars to the varying vars */ + { + struct prog_instruction *inst; + GLint endPos, var; + + /* Look for END instruction and insert the new varying writes */ + endPos = -1; + for (i = 0; i < prog->NumInstructions; i++) { + struct prog_instruction *inst = prog->Instructions + i; + if (inst->Opcode == OPCODE_END) { + endPos = i; + _mesa_insert_instructions(prog, i, numVaryingReads); + break; + } + } + + assert(endPos >= 0); + + /* insert new MOV instructions here */ + inst = prog->Instructions + endPos; + for (var = 0; var < VERT_RESULT_MAX; var++) { + if (outputMap[var] >= 0) { + /* MOV VAR[var], TEMP[tmp]; */ + inst->Opcode = OPCODE_MOV; + inst->DstReg.File = PROGRAM_VARYING; + inst->DstReg.Index = var; + inst->SrcReg[0].File = PROGRAM_TEMPORARY; + inst->SrcReg[0].Index = outputMap[var]; + inst++; + } + } + } +} diff --git a/src/mesa/shader/programopt.h b/src/mesa/shader/programopt.h index ce63644bbf5..47ff2f0c7be 100644 --- a/src/mesa/shader/programopt.h +++ b/src/mesa/shader/programopt.h @@ -39,5 +39,7 @@ _mesa_count_texture_indirections(struct gl_program *prog); extern void _mesa_count_texture_instructions(struct gl_program *prog); +extern void +_mesa_remove_varying_reads(struct gl_program *prog); #endif /* PROGRAMOPT_H */ |