r300/compiler: Implement the CONT opcode.

src/gallium/drivers/r300/r300_tgsi_to_rc.c

@@ -126,7 +126,7 @@ static unsigned translate_opcode(unsigned opcode)
      /* case TGSI_OPCODE_SAD: return RC_OPCODE_SAD; */
      /* case TGSI_OPCODE_TXF: return RC_OPCODE_TXF; */
      /* case TGSI_OPCODE_TXQ: return RC_OPCODE_TXQ; */
-     /* case TGSI_OPCODE_CONT: return RC_OPCODE_CONT; */
+        case TGSI_OPCODE_CONT: return RC_OPCODE_CONT;
      /* case TGSI_OPCODE_EMIT: return RC_OPCODE_EMIT; */
      /* case TGSI_OPCODE_ENDPRIM: return RC_OPCODE_ENDPRIM; */
      /* case TGSI_OPCODE_BGNLOOP2: return RC_OPCODE_BGNLOOP2; */

src/mesa/drivers/dri/r300/compiler/r500_fragprog_emit.c

@@ -70,6 +70,10 @@ struct loop_info {
 	int * Brks;
 	int BrkCount;
 	int BrkReserved;
+
+	int * Conts;
+	int ContCount;
+	int ContReserved;
 };
 
 struct emit_state {
@@ -413,15 +417,18 @@ static void emit_flowcontrol(struct emit_state * s, struct rc_instruction * inst
 			;
 		break;
 
-	case RC_OPCODE_CONTINUE:
+	case RC_OPCODE_CONT:
 		loop = &s->Loops[s->CurrentLoopDepth - 1];
-		s->Code->inst[newip].inst2 = R500_FC_OP_JUMP
+		memory_pool_array_reserve(&s->C->Pool, int, loop->Conts,
+					loop->ContCount, loop->ContReserved, 1);
+		loop->Conts[loop->ContCount++] = newip;
+		s->Code->inst[newip].inst2 = R500_FC_OP_CONTINUE
 			| R500_FC_JUMP_FUNC(0xff)
 			| R500_FC_B_OP1_DECR
 			| R500_FC_B_POP_CNT(
 				s->CurrentBranchDepth -	loop->BranchDepth)
+			| R500_FC_IGNORE_UNCOVERED
 			;
-		s->Code->inst[newip].inst3 = R500_FC_JUMP_ADDR(loop->BgnLoop);
 		break;
 
 	case RC_OPCODE_ENDLOOP:
@@ -449,6 +456,12 @@ static void emit_flowcontrol(struct emit_state * s, struct rc_instruction * inst
 			s->Code->inst[loop->Brks[loop->BrkCount]].inst3 =
 						R500_FC_JUMP_ADDR(newip + 1);
 		}
+
+		/* Set jump address for CONT instructions. */
+		while(loop->ContCount--) {
+			s->Code->inst[loop->Conts[loop->ContCount]].inst3 =
+						R500_FC_JUMP_ADDR(newip);
+		}
 		s->CurrentLoopDepth--;
 		break;
 	}

src/mesa/drivers/dri/r300/compiler/radeon_dataflow_deadcode.c

@@ -274,7 +274,7 @@ void rc_dataflow_deadcode(struct radeon_compiler * c, rc_dataflow_mark_outputs_f
 			}
 			break;
 		}
-		case RC_OPCODE_CONTINUE:
+		case RC_OPCODE_CONT:
 			break;
 		case RC_OPCODE_ENDIF:
 			push_branch(&s);

src/mesa/drivers/dri/r300/compiler/radeon_opcodes.c

@@ -386,8 +386,8 @@ struct rc_opcode_info rc_opcodes[MAX_RC_OPCODE] = {
 		.NumSrcRegs = 0,
 	},
 	{
-		.Opcode = RC_OPCODE_CONTINUE,
-		.Name = "CONTINUE",
+		.Opcode = RC_OPCODE_CONT,
+		.Name = "CONT",
 		.IsFlowControl = 1,
 		.NumSrcRegs = 0
 	},

src/mesa/drivers/dri/r300/compiler/radeon_opcodes.h

@@ -187,7 +187,7 @@ typedef enum {
 
 	RC_OPCODE_ENDLOOP,
 
-	RC_OPCODE_CONTINUE,
+	RC_OPCODE_CONT,
 
 	/** special instruction, used in R300-R500 fragment program pair instructions
 	 * indicates that the result of the alpha operation shall be replicated