diff options
| -rw-r--r-- | src/mesa/shader/programopt.c | 12 | ||||
| -rw-r--r-- | src/mesa/shader/programopt.h | 2 | ||||
| -rw-r--r-- | src/mesa/shader/slang/slang_compile.c | 3 |
3 files changed, 10 insertions, 7 deletions
diff --git a/src/mesa/shader/programopt.c b/src/mesa/shader/programopt.c index 7d560c74a5..da4e3fcfcf 100644 --- a/src/mesa/shader/programopt.c +++ b/src/mesa/shader/programopt.c @@ -367,20 +367,22 @@ _mesa_count_texture_instructions(struct gl_program *prog) /** - * Scan/rewrite program to remove reads of varying (output) registers. + * Scan/rewrite program to remove reads of custom (output) registers. + * The passed type has to be either PROGRAM_VARYING or PROGRAM_OUTPUT. * 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) +_mesa_remove_output_reads(struct gl_program *prog, enum register_file type) { GLuint i; GLint outputMap[VERT_RESULT_MAX]; GLuint numVaryingReads = 0; assert(prog->Target == GL_VERTEX_PROGRAM_ARB); + assert(type == PROGRAM_UNIFORM || type == PROGRAM_OUTPUT); for (i = 0; i < VERT_RESULT_MAX; i++) outputMap[i] = -1; @@ -391,7 +393,7 @@ _mesa_remove_varying_reads(struct gl_program *prog) 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) { + if (inst->SrcReg[j].File == type) { /* replace the read with a temp reg */ const GLuint var = inst->SrcReg[j].Index; if (outputMap[var] == -1) { @@ -414,7 +416,7 @@ _mesa_remove_varying_reads(struct gl_program *prog) const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode); GLuint j; for (j = 0; j < numSrc; j++) { - if (inst->DstReg.File == PROGRAM_VARYING && + if (inst->DstReg.File == type && outputMap[inst->DstReg.Index] >= 0) { /* change inst to write to the temp reg, instead of the varying */ inst->DstReg.File = PROGRAM_TEMPORARY; @@ -447,7 +449,7 @@ _mesa_remove_varying_reads(struct gl_program *prog) if (outputMap[var] >= 0) { /* MOV VAR[var], TEMP[tmp]; */ inst->Opcode = OPCODE_MOV; - inst->DstReg.File = PROGRAM_VARYING; + inst->DstReg.File = type; inst->DstReg.Index = var; inst->SrcReg[0].File = PROGRAM_TEMPORARY; inst->SrcReg[0].Index = outputMap[var]; diff --git a/src/mesa/shader/programopt.h b/src/mesa/shader/programopt.h index 47ff2f0c7b..11572e64f5 100644 --- a/src/mesa/shader/programopt.h +++ b/src/mesa/shader/programopt.h @@ -40,6 +40,6 @@ extern void _mesa_count_texture_instructions(struct gl_program *prog); extern void -_mesa_remove_varying_reads(struct gl_program *prog); +_mesa_remove_output_reads(struct gl_program *prog, enum register_file type); #endif /* PROGRAMOPT_H */ diff --git a/src/mesa/shader/slang/slang_compile.c b/src/mesa/shader/slang/slang_compile.c index f2e8aab8b0..cdea1c5128 100644 --- a/src/mesa/shader/slang/slang_compile.c +++ b/src/mesa/shader/slang/slang_compile.c @@ -2212,7 +2212,8 @@ _slang_compile(GLcontext *ctx, struct gl_shader *shader) printf("Pre-remove output reads:\n"); _mesa_print_program(shader->Programs[0]); #endif - _mesa_remove_varying_reads(shader->Programs[0]); + _mesa_remove_output_reads(shader->Programs[0], PROGRAM_VARYING); + _mesa_remove_output_reads(shader->Programs[0], PROGRAM_OUTPUT); #if 0 printf("Post-remove output reads:\n"); _mesa_print_program(shader->Programs[0]); |