From: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Sat, 23 May 2009 10:21:54 +0000 (+0200)
Subject: nv50: make LRP instruction nicer
X-Git-Tag: 062012170305~17489^2~158
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=229992d2812581ffae24d69a5a983d2c8441f720;p=profile%2Fivi%2Fmesa.git

nv50: make LRP instruction nicer
---

diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index a33ec59..6aec9cc 100644
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -1117,15 +1117,12 @@ nv50_program_tx_insn(struct nv50_pc *pc, const union tgsi_full_token *tok)
 		}
 		break;
 	case TGSI_OPCODE_LRP:
+		temp = temp_temp(pc);
 		for (c = 0; c < 4; c++) {
 			if (!(mask & (1 << c)))
 				continue;
-			/*XXX: we can do better than this */
-			temp = alloc_temp(pc, NULL);
-			emit_neg(pc, temp, src[0][c]);
-			emit_mad(pc, temp, temp, src[2][c], src[2][c]);
-			emit_mad(pc, dst[c], src[0][c], src[1][c], temp);
-			free_temp(pc, temp);
+			emit_sub(pc, temp, src[1][c], src[2][c]);
+			emit_mad(pc, dst[c], temp, src[0][c], src[2][c]);
 		}
 		break;
 	case TGSI_OPCODE_MAD: