nvfx: remove src_native_swz, which was a no-op

src_native_swz was used to translate 0/1 swizzles back when Gallium
supported them.

That support was later removed from Gallium, and the function currently
always returns true.

Remove it.

src/gallium/drivers/nvfx/nvfx_fragprog.c

@@ -298,39 +298,6 @@ tgsi_mask(uint tgsi)
 	return mask;
 }
 
-static boolean
-src_native_swz(struct nvfx_fpc *fpc, const struct tgsi_full_src_register *fsrc,
-	       struct nvfx_sreg *src)
-{
-	const struct nvfx_sreg none = nvfx_sr(NVFXSR_NONE, 0);
-	struct nvfx_sreg tgsi = tgsi_src(fpc, fsrc);
-	uint mask = 0;
-	uint c;
-
-	for (c = 0; c < 4; c++) {
-		switch (tgsi_util_get_full_src_register_swizzle(fsrc, c)) {
-		case TGSI_SWIZZLE_X:
-		case TGSI_SWIZZLE_Y:
-		case TGSI_SWIZZLE_Z:
-		case TGSI_SWIZZLE_W:
-			mask |= (1 << c);
-			break;
-		default:
-			assert(0);
-		}
-	}
-
-	if (mask == NVFX_FP_MASK_ALL)
-		return TRUE;
-
-	*src = temp(fpc);
-
-	if (mask)
-		arith(fpc, 0, MOV, *src, mask, tgsi, none, none);
-
-	return FALSE;
-}
-
 static boolean
 nvfx_fragprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_fpc *fpc,
 				const struct tgsi_full_instruction *finst)
@@ -358,17 +325,6 @@ nvfx_fragprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_fpc *fpc,
 
 		fsrc = &finst->Src[i];
 
-		switch (fsrc->Register.File) {
-		case TGSI_FILE_INPUT:
-		case TGSI_FILE_CONSTANT:
-		case TGSI_FILE_TEMPORARY:
-			if (!src_native_swz(fpc, fsrc, &src[i]))
-				continue;
-			break;
-		default:
-			break;
-		}
-
 		switch (fsrc->Register.File) {
 		case TGSI_FILE_INPUT:
 			if (ai == -1 || ai == fsrc->Register.Index) {

src/gallium/drivers/nvfx/nvfx_vertprog.c

@@ -397,39 +397,6 @@ tgsi_mask(uint tgsi)
 	return mask;
 }
 
-static boolean
-src_native_swz(struct nvfx_context* nvfx, struct nvfx_vpc *vpc, const struct tgsi_full_src_register *fsrc,
-	       struct nvfx_sreg *src)
-{
-	const struct nvfx_sreg none = nvfx_sr(NVFXSR_NONE, 0);
-	struct nvfx_sreg tgsi = tgsi_src(vpc, fsrc);
-	uint mask = 0;
-	uint c;
-
-	for (c = 0; c < 4; c++) {
-		switch (tgsi_util_get_full_src_register_swizzle(fsrc, c)) {
-		case TGSI_SWIZZLE_X:
-		case TGSI_SWIZZLE_Y:
-		case TGSI_SWIZZLE_Z:
-		case TGSI_SWIZZLE_W:
-			mask |= tgsi_mask(1 << c);
-			break;
-		default:
-			assert(0);
-		}
-	}
-
-	if (mask == NVFX_VP_MASK_ALL)
-		return TRUE;
-
-	*src = temp(vpc);
-
-	if (mask)
-		arith(vpc, VEC, MOV, *src, mask, tgsi, none, none);
-
-	return FALSE;
-}
-
 static boolean
 nvfx_vertprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_vpc *vpc,
 				const struct tgsi_full_instruction *finst)
@@ -457,17 +424,6 @@ nvfx_vertprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_vpc *vpc,
 
 		fsrc = &finst->Src[i];
 
-		switch (fsrc->Register.File) {
-		case TGSI_FILE_INPUT:
-		case TGSI_FILE_CONSTANT:
-		case TGSI_FILE_TEMPORARY:
-			if (!src_native_swz(nvfx, vpc, fsrc, &src[i]))
-				continue;
-			break;
-		default:
-			break;
-		}
-
 		switch (fsrc->Register.File) {
 		case TGSI_FILE_INPUT:
 			if (ai == -1 || ai == fsrc->Register.Index) {