[Mesa-dev] [PATCH 2/5] r600: add support for vertex fetches via texture cache

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

On evergreen we can route vertex fetches via the texture cache,
and this is required for some images support. So add support
to the asm builder for it.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/gallium/drivers/r600/r600_asm.c | 20 ++++++++++++++++++--
 src/gallium/drivers/r600/r600_asm.h |  2 ++
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index 27f5647..9761fe0 100644
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -1336,7 +1336,8 @@ static inline boolean last_inst_was_not_vtx_fetch(struct r600_bytecode *bc)
 			bc->cf_last->op != CF_OP_TEX));
 }
 
-int r600_bytecode_add_vtx(struct r600_bytecode *bc, const struct r600_bytecode_vtx *vtx)
+static int r600_bytecode_add_vtx_internal(struct r600_bytecode *bc, const struct r600_bytecode_vtx *vtx,
+					  bool use_tc)
 {
 	struct r600_bytecode_vtx *nvtx = r600_bytecode_vtx();
 	int r;
@@ -1363,9 +1364,14 @@ int r600_bytecode_add_vtx(struct r600_bytecode *bc, const struct r600_bytecode_v
 		switch (bc->chip_class) {
 		case R600:
 		case R700:
-		case EVERGREEN:
 			bc->cf_last->op = CF_OP_VTX;
 			break;
+		case EVERGREEN:
+			if (use_tc)
+				bc->cf_last->op = CF_OP_TEX;
+			else
+				bc->cf_last->op = CF_OP_VTX;
+			break;
 		case CAYMAN:
 			bc->cf_last->op = CF_OP_TEX;
 			break;
@@ -1388,6 +1394,16 @@ int r600_bytecode_add_vtx(struct r600_bytecode *bc, const struct r600_bytecode_v
 	return 0;
 }
 
+int r600_bytecode_add_vtx(struct r600_bytecode *bc, const struct r600_bytecode_vtx *vtx)
+{
+	return r600_bytecode_add_vtx_internal(bc, vtx, false);
+}
+
+int r600_bytecode_add_vtx_tc(struct r600_bytecode *bc, const struct r600_bytecode_vtx *vtx)
+{
+	return r600_bytecode_add_vtx_internal(bc, vtx, true);
+}
+
 int r600_bytecode_add_tex(struct r600_bytecode *bc, const struct r600_bytecode_tex *tex)
 {
 	struct r600_bytecode_tex *ntex = r600_bytecode_tex();
diff --git a/src/gallium/drivers/r600/r600_asm.h b/src/gallium/drivers/r600/r600_asm.h
index b12913d..8992e0d 100644
--- a/src/gallium/drivers/r600/r600_asm.h
+++ b/src/gallium/drivers/r600/r600_asm.h
@@ -268,6 +268,8 @@ int r600_bytecode_add_alu(struct r600_bytecode *bc,
 		const struct r600_bytecode_alu *alu);
 int r600_bytecode_add_vtx(struct r600_bytecode *bc,
 		const struct r600_bytecode_vtx *vtx);
+int r600_bytecode_add_vtx_tc(struct r600_bytecode *bc,
+			     const struct r600_bytecode_vtx *vtx);
 int r600_bytecode_add_tex(struct r600_bytecode *bc,
 		const struct r600_bytecode_tex *tex);
 int r600_bytecode_add_gds(struct r600_bytecode *bc,
-- 
2.9.3