From: Marek Olšák <maraeo@gmail.com>
Date: Sat, 5 Jun 2010 02:58:40 +0000 (+0200)
Subject: r300/compiler: implement SNE unwound for r3xx VS, natively for r5xx VS
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=722db9fa77de16b92adf19fda00c9671d896749e;p=mesa.git

r300/compiler: implement SNE unwound for r3xx VS, natively for r5xx VS
---

diff --git a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c
index 755161cdc76..dd307856a77 100644
--- a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c
+++ b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c
@@ -353,7 +353,9 @@ static void translate_vertex_program(struct r300_vertex_program_compiler * compi
 			return;
 		}
 
-		assert(compiler->Base.is_r500 || vpi->Opcode != RC_OPCODE_SEQ);
+		assert(compiler->Base.is_r500 ||
+		       (vpi->Opcode != RC_OPCODE_SEQ &&
+			vpi->Opcode != RC_OPCODE_SNE));
 
 		switch (vpi->Opcode) {
 		case RC_OPCODE_ADD: ei_vector2(compiler->code, VE_ADD, vpi, inst); break;
@@ -377,6 +379,7 @@ static void translate_vertex_program(struct r300_vertex_program_compiler * compi
 		case RC_OPCODE_SEQ: ei_vector2(compiler->code, VE_SET_EQUAL, vpi, inst); break;
 		case RC_OPCODE_SGE: ei_vector2(compiler->code, VE_SET_GREATER_THAN_EQUAL, vpi, inst); break;
 		case RC_OPCODE_SLT: ei_vector2(compiler->code, VE_SET_LESS_THAN, vpi, inst); break;
+		case RC_OPCODE_SNE: ei_vector2(compiler->code, VE_SET_NOT_EQUAL, vpi, inst); break;
 		default:
 			rc_error(&compiler->Base, "Unknown opcode %s\n", rc_get_opcode_info(vpi->Opcode)->Name);
 			return;
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c
index 67e2cc0c82c..d14de79565d 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c
@@ -627,6 +627,33 @@ static void transform_r300_vertex_SEQ(struct radeon_compiler *c,
 	rc_remove_instruction(inst);
 }
 
+static void transform_r300_vertex_SNE(struct radeon_compiler *c,
+	struct rc_instruction *inst)
+{
+	/* x != y  <==>  x < y || y < x */
+	int tmp = rc_find_free_temporary(c);
+
+	/* x < y */
+	emit2(c, inst->Prev, RC_OPCODE_SLT, 0,
+	      dstregtmpmask(tmp, inst->U.I.DstReg.WriteMask),
+	      inst->U.I.SrcReg[0],
+	      inst->U.I.SrcReg[1]);
+
+	/* y < x */
+	emit2(c, inst->Prev, RC_OPCODE_SLT, 0,
+	      inst->U.I.DstReg,
+	      inst->U.I.SrcReg[1],
+	      inst->U.I.SrcReg[0]);
+
+	/* x || y  =  max(x, y) */
+	emit2(c, inst->Prev, RC_OPCODE_MAX, 0,
+	      inst->U.I.DstReg,
+	      srcreg(RC_FILE_TEMPORARY, tmp),
+	      srcreg(inst->U.I.DstReg.File, inst->U.I.DstReg.Index));
+
+	rc_remove_instruction(inst);
+}
+
 static void transform_r300_vertex_SGT(struct radeon_compiler* c,
 	struct rc_instruction* inst)
 {
@@ -672,6 +699,12 @@ int r300_transform_vertex_alu(
 	case RC_OPCODE_SFL: transform_SFL(c, inst); return 1;
 	case RC_OPCODE_SGT: transform_r300_vertex_SGT(c, inst); return 1;
 	case RC_OPCODE_SLE: transform_r300_vertex_SLE(c, inst); return 1;
+	case RC_OPCODE_SNE:
+		if (!c->is_r500) {
+			transform_r300_vertex_SNE(c, inst);
+			return 1;
+		}
+		return 0;
 	case RC_OPCODE_SUB: transform_SUB(c, inst); return 1;
 	case RC_OPCODE_SWZ: transform_SWZ(c, inst); return 1;
 	case RC_OPCODE_XPD: transform_XPD(c, inst); return 1;