[Mesa-dev] [PATCH 2/6] r600g: Add FC_NATIVE instruction

[Tom Stellard]

This is a pseudo instruction that enables the LLVM backend to encode
instructions and pass it through r600_bytecode_build()
---
 src/gallium/drivers/r600/eg_asm.c   |    4 ++++
 src/gallium/drivers/r600/r600_asm.c |    7 +++++++
 src/gallium/drivers/r600/r600_asm.h |    9 +++++++++
 3 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/r600/eg_asm.c b/src/gallium/drivers/r600/eg_asm.c
index b6d03ef..d2c1679 100644
--- a/src/gallium/drivers/r600/eg_asm.c
+++ b/src/gallium/drivers/r600/eg_asm.c
@@ -133,6 +133,10 @@ int eg_bytecode_cf_build(struct r600_bytecode *bc, struct r600_bytecode_cf *cf)
 					S_SQ_CF_WORD1_COND(cf->cond) |
 					S_SQ_CF_WORD1_POP_COUNT(cf->pop_count);
 		break;
+	case CF_NATIVE:
+		bc->bytecode[id++] = cf->isa[0];
+		bc->bytecode[id++] = cf->isa[1];
+		break;
 	default:
 		R600_ERR("unsupported CF instruction (0x%X)\n", cf->inst);
 		return -EINVAL;
diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index 5f83879..d1a0a4a 100644
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -1928,6 +1928,7 @@ int r600_bytecode_build(struct r600_bytecode *bc)
 			case EG_V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
 			case EG_V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
 			case CM_V_SQ_CF_WORD1_SQ_CF_INST_END:
+			case CF_NATIVE:
 				break;
 			default:
 				R600_ERR("unsupported CF instruction (0x%X)\n", cf->inst);
@@ -2070,6 +2071,8 @@ int r600_bytecode_build(struct r600_bytecode *bc)
 			case EG_V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
 			case CM_V_SQ_CF_WORD1_SQ_CF_INST_END:
 				break;
+			case CF_NATIVE:
+				break;
 			default:
 				R600_ERR("unsupported CF instruction (0x%X)\n", cf->inst);
 				return -EINVAL;
@@ -2342,6 +2345,10 @@ void r600_bytecode_dump(struct r600_bytecode *bc)
 				fprintf(stderr, "COND:%X ", cf->cond);
 				fprintf(stderr, "POP_COUNT:%X\n", cf->pop_count);
 				break;
+			case CF_NATIVE:
+				fprintf(stderr, "%04d %08X CF NATIVE\n", id, bc->bytecode[id]);
+				fprintf(stderr, "%04d %08X CF NATIVE\n", id + 1, bc->bytecode[id + 1]);
+				break;
 			default:
 				R600_ERR("Unknown instruction %0x\n", cf->inst);
 			}
diff --git a/src/gallium/drivers/r600/r600_asm.h b/src/gallium/drivers/r600/r600_asm.h
index 86d44d3..8662ced 100644
--- a/src/gallium/drivers/r600/r600_asm.h
+++ b/src/gallium/drivers/r600/r600_asm.h
@@ -135,6 +135,14 @@ struct r600_bytecode_kcache {
 	unsigned			addr;
 };
 
+/* A value of CF_NATIVE in r600_bytecode_cf::inst means that this instruction
+ * has already been encoded, and the encoding has been stored in
+ * r600_bytecode::isa.  This is used by the LLVM backend to emit CF instructions
+ * e.g. RAT_WRITE_* that can't be properly represented by struct
+ * r600_bytecode_cf.
+ */
+#define CF_NATIVE ~0
+
 struct r600_bytecode_cf {
 	struct list_head		list;
 
@@ -157,6 +165,7 @@ struct r600_bytecode_cf {
 	struct r600_bytecode_alu		*curr_bs_head;
 	struct r600_bytecode_alu		*prev_bs_head;
 	struct r600_bytecode_alu		*prev2_bs_head;
+	unsigned isa[2];
 };
 
 #define FC_NONE				0
-- 
1.7.7.6