[Mesa-dev] [PATCH 10/21] r600/sb: add initial support for parsing lds operations.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This handles parsing the LDS ops and queue accessess.
---
 src/gallium/drivers/r600/sb/sb_bc_parser.cpp | 52 ++++++++++++++++++++++++++--
 1 file changed, 50 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
index 8ab4083a3c..970e4141d5 100644
--- a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
+++ b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
@@ -384,7 +384,40 @@ int bc_parser::prepare_alu_group(cf_node* cf, alu_group_node *g) {
 
 		unsigned flags = n->bc.op_ptr->flags;
 
-		if (flags & AF_PRED) {
+		if (flags & AF_LDS) {
+			bool need_rw = false, need_oqa = false, need_oqb = false;
+			int ndst = 0, ncount = 0;
+
+			/* all non-read operations have side effects */
+			if (n->bc.op != LDS_OP2_LDS_READ2_RET &&
+			    n->bc.op != LDS_OP1_LDS_READ_REL_RET &&
+			    n->bc.op != LDS_OP1_LDS_READ_RET) {
+				n->flags |= NF_DONT_KILL;
+				ndst++;
+				need_rw = true;
+			}
+
+			if (n->bc.op >= LDS_OP2_LDS_ADD_RET && n->bc.op <= LDS_OP1_LDS_USHORT_READ_RET) {
+				need_oqa = true;
+				ndst++;
+			}
+
+			if (n->bc.op == LDS_OP2_LDS_READ2_RET || n->bc.op == LDS_OP1_LDS_READ_REL_RET) {
+				need_oqb = true;
+				ndst++;
+			}
+
+			n->dst.resize(ndst);
+			if (need_oqa)
+				n->dst[ncount++] = sh->get_special_value(SV_LDS_OQA);
+			if (need_oqb)
+				n->dst[ncount++] = sh->get_special_value(SV_LDS_OQB);
+			if (need_rw)
+				n->dst[ncount++] = sh->get_special_value(SV_LDS_RW);
+
+			n->flags |= NF_DONT_MOVE | NF_DONT_HOIST;
+
+		} else if (flags & AF_PRED) {
 			n->dst.resize(3);
 			if (n->bc.update_pred)
 				n->dst[1] = sh->get_special_value(SV_ALU_PRED);
@@ -417,7 +450,7 @@ int bc_parser::prepare_alu_group(cf_node* cf, alu_group_node *g) {
 
 			n->flags |= NF_DONT_HOIST;
 
-		} else if (n->bc.op_ptr->src_count == 3 || n->bc.write_mask) {
+		} else if ((n->bc.op_ptr->src_count == 3 || n->bc.write_mask) && !(flags & AF_LDS)) {
 			assert(!n->bc.dst_rel || n->bc.index_mode == INDEX_AR_X);
 
 			value *v = sh->get_gpr_value(false, n->bc.dst_gpr, n->bc.dst_chan,
@@ -487,6 +520,21 @@ int bc_parser::prepare_alu_group(cf_node* cf, alu_group_node *g) {
 				// param index as equal instructions and leave only one of them
 				n->src[s] = sh->get_special_ro_value(sel_chan(src.sel,
 				                                              n->bc.slot));
+			} else if (ctx.is_lds_oq(src.sel)) {
+				switch (src.sel) {
+				case ALU_SRC_LDS_OQ_A:
+				case ALU_SRC_LDS_OQ_B:
+					assert(!"Unsupported LDS queue access in SB");
+					break;
+				case ALU_SRC_LDS_OQ_A_POP:
+					n->src[s] = sh->get_special_value(SV_LDS_OQA);
+					break;
+				case ALU_SRC_LDS_OQ_B_POP:
+					n->src[s] = sh->get_special_value(SV_LDS_OQB);
+					break;
+				}
+				n->flags |= NF_DONT_HOIST | NF_DONT_MOVE;
+
 			} else {
 				switch (src.sel) {
 				case ALU_SRC_0:
-- 
2.14.3