diff options
Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler/radeon_compiler.c')
-rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_compiler.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_compiler.c b/src/mesa/drivers/dri/r300/compiler/radeon_compiler.c index 6e7361d568..da950d5289 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_compiler.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_compiler.c @@ -149,6 +149,47 @@ void rc_move_output(struct radeon_compiler * c, unsigned output, unsigned new_ou /** + * Rewrite the program such that a given output is duplicated. + */ +void rc_copy_output(struct radeon_compiler * c, unsigned output, unsigned dup_output) +{ + unsigned tempreg = rc_find_free_temporary(c); + struct rc_instruction * inst; + + for(inst = c->Program.Instructions.Next; inst != &c->Program.Instructions; inst = inst->Next) { + const unsigned numdsts = _mesa_num_inst_dst_regs(inst->I.Opcode); + + if (numdsts) { + if (inst->I.DstReg.File == PROGRAM_OUTPUT && inst->I.DstReg.Index == output) { + inst->I.DstReg.File = PROGRAM_TEMPORARY; + inst->I.DstReg.Index = tempreg; + } + } + } + + inst = rc_insert_new_instruction(c, c->Program.Instructions.Prev); + inst->I.Opcode = OPCODE_MOV; + inst->I.DstReg.File = PROGRAM_OUTPUT; + inst->I.DstReg.Index = output; + + inst->I.SrcReg[0].File = PROGRAM_TEMPORARY; + inst->I.SrcReg[0].Index = tempreg; + inst->I.SrcReg[0].Swizzle = SWIZZLE_XYZW; + + inst = rc_insert_new_instruction(c, c->Program.Instructions.Prev); + inst->I.Opcode = OPCODE_MOV; + inst->I.DstReg.File = PROGRAM_OUTPUT; + inst->I.DstReg.Index = dup_output; + + inst->I.SrcReg[0].File = PROGRAM_TEMPORARY; + inst->I.SrcReg[0].Index = tempreg; + inst->I.SrcReg[0].Swizzle = SWIZZLE_XYZW; + + c->Program.OutputsWritten |= 1 << dup_output; +} + + +/** * Introduce standard code fragment to deal with fragment.position. */ void rc_transform_fragment_wpos(struct radeon_compiler * c, unsigned wpos, unsigned new_input) |