Module: Mesa Branch: master Commit: 35a6df573090e31d9eb921d6863b0939458f880c URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=35a6df573090e31d9eb921d6863b0939458f880c
Author: Marek Olšák <[email protected]> Date: Sat May 8 04:00:38 2010 +0200 r300/compiler: use perspective division only for TXP in shadow samplers --- .../drivers/dri/r300/compiler/radeon_program_tex.c | 59 ++++++++++++-------- 1 files changed, 36 insertions(+), 23 deletions(-) diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c index e1bb7c7..f7c54d0 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c @@ -113,13 +113,13 @@ int radeonTransformTEX( return 1; } else { rc_compare_func comparefunc = compiler->state.unit[inst->U.I.TexSrcUnit].texture_compare_func; - struct rc_instruction * inst_rcp = rc_insert_new_instruction(c, inst); - struct rc_instruction * inst_mad = rc_insert_new_instruction(c, inst_rcp); - struct rc_instruction * inst_cmp = rc_insert_new_instruction(c, inst_mad); - unsigned tmp_recip_w = rc_find_free_temporary(c); + struct rc_instruction * inst_rcp = NULL; + struct rc_instruction * inst_mad; + struct rc_instruction * inst_cmp; unsigned tmp_texsample = rc_find_free_temporary(c); unsigned tmp_sum = rc_find_free_temporary(c); - int pass, fail; + unsigned tmp_recip_w; + int pass, fail, tex; /* Save the output register. */ struct rc_dst_register output_reg = inst->U.I.DstReg; @@ -129,28 +129,40 @@ int radeonTransformTEX( inst->U.I.DstReg.Index = tmp_texsample; inst->U.I.DstReg.WriteMask = RC_MASK_XYZW; - /* Compute 1/W. */ - inst_rcp->U.I.Opcode = RC_OPCODE_RCP; - inst_rcp->U.I.DstReg.File = RC_FILE_TEMPORARY; - inst_rcp->U.I.DstReg.Index = tmp_recip_w; - inst_rcp->U.I.DstReg.WriteMask = RC_MASK_W; - inst_rcp->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; - inst_rcp->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_WWWW; + if (inst->U.I.Opcode == RC_OPCODE_TXP) { + tmp_recip_w = rc_find_free_temporary(c); + + /* Compute 1/W. */ + inst_rcp = rc_insert_new_instruction(c, inst); + inst_rcp->U.I.Opcode = RC_OPCODE_RCP; + inst_rcp->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rcp->U.I.DstReg.Index = tmp_recip_w; + inst_rcp->U.I.DstReg.WriteMask = RC_MASK_W; + inst_rcp->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_rcp->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_WWWW; + } - /* Perspective-divide r (=depth) by W and add the texture sample (see below). */ - inst_mad->U.I.Opcode = RC_OPCODE_MAD; + /* Perspective-divide r by W (if it's TXP) and add the texture sample (see below). */ + inst_mad = rc_insert_new_instruction(c, inst_rcp ? inst_rcp : inst); inst_mad->U.I.DstReg.File = RC_FILE_TEMPORARY; inst_mad->U.I.DstReg.Index = tmp_sum; inst_mad->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; inst_mad->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_ZZZZ; - inst_mad->U.I.SrcReg[1].File = RC_FILE_TEMPORARY; - inst_mad->U.I.SrcReg[1].Index = tmp_recip_w; - inst_mad->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW; - inst_mad->U.I.SrcReg[2].File = RC_FILE_TEMPORARY; - inst_mad->U.I.SrcReg[2].Index = tmp_texsample; - inst_mad->U.I.SrcReg[2].Swizzle = compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle; - - /* Recall that SrcReg[0] is tex, SrcReg[2] is r and: + if (inst->U.I.Opcode == RC_OPCODE_TXP) { + inst_mad->U.I.Opcode = RC_OPCODE_MAD; + inst_mad->U.I.SrcReg[1].File = RC_FILE_TEMPORARY; + inst_mad->U.I.SrcReg[1].Index = tmp_recip_w; + inst_mad->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW; + tex = 2; + } else { + inst_mad->U.I.Opcode = RC_OPCODE_ADD; + tex = 1; + } + inst_mad->U.I.SrcReg[tex].File = RC_FILE_TEMPORARY; + inst_mad->U.I.SrcReg[tex].Index = tmp_texsample; + inst_mad->U.I.SrcReg[tex].Swizzle = compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle; + + /* Recall that SrcReg[0] is r, SrcReg[tex] is tex and: * LESS: r < tex <=> -tex+r < 0 * GEQUAL: r >= tex <=> not (-tex+r < 0) * GREATER: r > tex <=> tex-r < 0 @@ -158,7 +170,7 @@ int radeonTransformTEX( * * This negates either r or tex: */ if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GEQUAL) - inst_mad->U.I.SrcReg[2].Negate = inst_mad->U.I.SrcReg[2].Negate ^ RC_MASK_XYZW; + inst_mad->U.I.SrcReg[tex].Negate = inst_mad->U.I.SrcReg[tex].Negate ^ RC_MASK_XYZW; else inst_mad->U.I.SrcReg[0].Negate = inst_mad->U.I.SrcReg[0].Negate ^ RC_MASK_XYZW; @@ -171,6 +183,7 @@ int radeonTransformTEX( fail = 1; } + inst_cmp = rc_insert_new_instruction(c, inst_mad); inst_cmp->U.I.Opcode = RC_OPCODE_CMP; inst_cmp->U.I.DstReg = output_reg; inst_cmp->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
