+ case RC_OPCODE_BGNLOOP:
+ {
+ struct loop * l;
+
+ if ((!compiler->Base.is_r500
+ && loops_reserved >= R300_VS_MAX_LOOP_DEPTH)
+ || loops_reserved >= R500_VS_MAX_FC_DEPTH) {
+ rc_error(&compiler->Base,
+ "Loops are nested too deep.");
+ return;
+ }
+ memory_pool_array_reserve(&compiler->Base.Pool,
+ struct loop, loops, current_loop_depth,
+ loops_reserved, 1);
+ l = &loops[current_loop_depth++];
+ memset(l , 0, sizeof(struct loop));
+ l->BgnLoop = (compiler->code->length / 4);
+ continue;
+ }
+ case RC_OPCODE_ENDLOOP:
+ {
+ struct loop * l = &loops[current_loop_depth - 1];
+ unsigned int act_addr = l->BgnLoop - 1;
+ unsigned int last_addr = (compiler->code->length / 4) - 1;
+ unsigned int ret_addr = l->BgnLoop;
+
+ if (loops_reserved >= R300_VS_MAX_FC_OPS) {
+ rc_error(&compiler->Base,
+ "Too many flow control instructions.");
+ return;
+ }
+ if (compiler->Base.is_r500) {
+ compiler->code->fc_op_addrs.r500
+ [compiler->code->num_fc_ops].lw =
+ R500_PVS_FC_ACT_ADRS(act_addr)
+ | R500_PVS_FC_LOOP_CNT_JMP_INST(0xffff)
+ ;
+ compiler->code->fc_op_addrs.r500
+ [compiler->code->num_fc_ops].uw =
+ R500_PVS_FC_LAST_INST(last_addr)
+ | R500_PVS_FC_RTN_INST(ret_addr)
+ ;
+ } else {
+ compiler->code->fc_op_addrs.r300
+ [compiler->code->num_fc_ops] =
+ R300_PVS_FC_ACT_ADRS(act_addr)
+ | R300_PVS_FC_LOOP_CNT_JMP_INST(0xff)
+ | R300_PVS_FC_LAST_INST(last_addr)
+ | R300_PVS_FC_RTN_INST(ret_addr)
+ ;
+ }
+ compiler->code->fc_loop_index[compiler->code->num_fc_ops] =
+ R300_PVS_FC_LOOP_INIT_VAL(0x0)
+ | R300_PVS_FC_LOOP_STEP_VAL(0x1)
+ ;
+ compiler->code->fc_ops |= R300_VAP_PVS_FC_OPC_LOOP(
+ compiler->code->num_fc_ops);
+ compiler->code->num_fc_ops++;
+ current_loop_depth--;
+ continue;
+ }
+