r300/compiler: Fix texture instruction readmasks.

No immediate benefit, it was just bugging me.

3 files changed, 27 insertions, 7 deletions

diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_deadcode.c b/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_deadcode.c
index e0c66c4aeb0..f3734852cc6 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_deadcode.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_deadcode.c
@@ -162,7 +162,7 @@ static void update_instruction(struct deadcode_state * s, struct rc_instruction
 	}
 
 	unsigned int srcmasks[3];
-	rc_compute_sources_for_writemask(opcode, usedmask, srcmasks);
+	rc_compute_sources_for_writemask(inst, usedmask, srcmasks);
 
 	for(unsigned int src = 0; src < opcode->NumSrcRegs; ++src) {
 		unsigned int refmask = 0;
@@ -250,7 +250,7 @@ void rc_dataflow_deadcode(struct radeon_compiler * c, rc_dataflow_mark_outputs_f
 	for(struct rc_instruction * inst = c->Program.Instructions.Next;
 	    inst != &c->Program.Instructions;
 	    inst = inst->Next, ++ip) {
-		const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode);\
+		const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode);
 		int dead = 1;
 
 		if (!opcode->HasDstReg) {
@@ -281,7 +281,7 @@ void rc_dataflow_deadcode(struct radeon_compiler * c, rc_dataflow_mark_outputs_f
 		else if (inst->U.I.WriteALUResult == RC_ALURESULT_W)
 			usemask |= RC_MASK_W;
 
-		rc_compute_sources_for_writemask(opcode, usemask, srcmasks);
+		rc_compute_sources_for_writemask(inst, usemask, srcmasks);
 
 		for(unsigned int src = 0; src < 3; ++src) {
 			for(unsigned int chan = 0; chan < 4; ++chan) {
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.c b/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.c
index cf8602e3290..ffc91241ab8 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.c
@@ -26,6 +26,7 @@
  */
 
 #include "radeon_opcodes.h"
+#include "radeon_program.h"
 
 #include "radeon_program_constants.h"
 
@@ -371,10 +372,11 @@ struct rc_opcode_info rc_opcodes[MAX_RC_OPCODE] = {
 };
 
 void rc_compute_sources_for_writemask(
-		const struct rc_opcode_info * opcode,
+		const struct rc_instruction *inst,
 		unsigned int writemask,
 		unsigned int *srcmasks)
 {
+	const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode);
 	srcmasks[0] = 0;
 	srcmasks[1] = 0;
 	srcmasks[2] = 0;
@@ -406,10 +408,26 @@ void rc_compute_sources_for_writemask(
 			srcmasks[0] |= RC_MASK_XYZW;
 			srcmasks[1] |= RC_MASK_XYZW;
 			break;
-		case RC_OPCODE_TEX:
 		case RC_OPCODE_TXB:
 		case RC_OPCODE_TXP:
-			srcmasks[0] |= RC_MASK_XYZW;
+			srcmasks[0] |= RC_MASK_W;
+			/* Fall through */
+		case RC_OPCODE_TEX:
+			switch (inst->U.I.TexSrcTarget) {
+				case RC_TEXTURE_1D:
+					srcmasks[0] |= RC_MASK_X;
+					break;
+				case RC_TEXTURE_2D:
+				case RC_TEXTURE_RECT:
+				case RC_TEXTURE_1D_ARRAY:
+					srcmasks[0] |= RC_MASK_XY;
+					break;
+				case RC_TEXTURE_3D:
+				case RC_TEXTURE_CUBE:
+				case RC_TEXTURE_2D_ARRAY:
+					srcmasks[0] |= RC_MASK_XYZ;
+					break;
+			}
 			break;
 		case RC_OPCODE_DST:
 			srcmasks[0] |= RC_MASK_Y | RC_MASK_Z;
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.h b/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.h
index a3c5b869546..1c9b34df78e 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.h
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_opcodes.h
@@ -227,8 +227,10 @@ static inline const struct rc_opcode_info * rc_get_opcode_info(rc_opcode opcode)
 	return &rc_opcodes[opcode];
 }
 
+struct rc_instruction;
+
 void rc_compute_sources_for_writemask(
-		const struct rc_opcode_info * opcode,
+		const struct rc_instruction *inst,
 		unsigned int writemask,
 		unsigned int *srcmasks);