diff options
| -rw-r--r-- | src/mesa/shader/program.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/src/mesa/shader/program.c b/src/mesa/shader/program.c index 39c4ca1dd5..09a8494bd3 100644 --- a/src/mesa/shader/program.c +++ b/src/mesa/shader/program.c @@ -426,6 +426,7 @@ replace_registers(struct prog_instruction *inst, GLuint numInst, { GLuint i, j; for (i = 0; i < numInst; i++) { + /* src regs */ 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) { @@ -433,6 +434,11 @@ replace_registers(struct prog_instruction *inst, GLuint numInst, inst[i].SrcReg[j].Index = newIndex; } } + /* dst reg */ + if (inst[i].DstReg.File == oldFile && inst[i].DstReg.Index == oldIndex) { + inst[i].DstReg.File = newFile; + inst[i].DstReg.Index = newIndex; + } } } @@ -504,12 +510,25 @@ _mesa_combine_programs(GLcontext *ctx, newFprog->UsesKill = fprogA->UsesKill || fprogB->UsesKill; - /* connect color outputs/inputs */ + /* Connect color outputs of fprogA to color inputs of fprogB, via a + * new temporary register. + */ if ((progA->OutputsWritten & (1 << FRAG_RESULT_COLR)) && (progB->InputsRead & (1 << FRAG_ATTRIB_COL0))) { + GLint tempReg = _mesa_find_free_register(newProg, PROGRAM_TEMPORARY); + if (!tempReg) { + _mesa_problem(ctx, "No free temp regs found in " + "_mesa_combine_programs(), using 31"); + tempReg = 31; + } + /* replace writes to result.color[0] with tempReg */ + replace_registers(newInst, lenA, + PROGRAM_OUTPUT, FRAG_RESULT_COLR, + PROGRAM_TEMPORARY, tempReg); + /* replace reads from input.color[0] with tempReg */ replace_registers(newInst + lenA, lenB, PROGRAM_INPUT, FRAG_ATTRIB_COL0, - PROGRAM_OUTPUT, FRAG_RESULT_COLR); + PROGRAM_TEMPORARY, tempReg); } inputsB = progB->InputsRead; |