to_nop->opcode = 0;
}
+static void lightrec_remove_useless_lui(struct block *block, unsigned int offset,
+ u32 known, u32 *values)
+{
+ struct opcode *list = block->opcode_list,
+ *op = &block->opcode_list[offset];
+ int reader;
+
+ if (!(op->flags & LIGHTREC_SYNC) && (known & BIT(op->i.rt)) &&
+ values[op->i.rt] == op->i.imm << 16) {
+ pr_debug("Converting duplicated LUI to NOP\n");
+ op->opcode = 0x0;
+ return;
+ }
+
+ if (op->i.imm != 0 || op->i.rt == 0)
+ return;
+
+ reader = find_next_reader(list, offset + 1, op->i.rt);
+ if (reader <= 0)
+ return;
+
+ if (opcode_writes_register(list[reader].c, op->i.rt) ||
+ reg_is_dead(list, reader, op->i.rt)) {
+ pr_debug("Removing useless LUI 0x0\n");
+
+ if (list[reader].i.rs == op->i.rt)
+ list[reader].i.rs = 0;
+ if (list[reader].i.op == OP_SPECIAL &&
+ list[reader].i.rt == op->i.rt)
+ list[reader].i.rt = 0;
+ op->opcode = 0x0;
+ }
+}
+
+static void lightrec_modify_lui(struct block *block, unsigned int offset)
+{
+ union code c, *lui = &block->opcode_list[offset].c;
+ bool stop = false, stop_next = false;
+ unsigned int i;
+
+ for (i = offset + 1; !stop && i < block->nb_ops; i++) {
+ c = block->opcode_list[i].c;
+ stop = stop_next;
+
+ if ((opcode_is_store(c) && c.i.rt == lui->i.rt)
+ || (!opcode_is_load(c) && opcode_reads_register(c, lui->i.rt)))
+ break;
+
+ if (opcode_writes_register(c, lui->i.rt)) {
+ pr_debug("Convert LUI at offset 0x%x to kuseg\n",
+ i - 1 << 2);
+ lui->i.imm = kunseg(lui->i.imm << 16) >> 16;
+ break;
+ }
+
+ if (has_delay_slot(c))
+ stop_next = true;
+ }
+}
+
static int lightrec_transform_ops(struct lightrec_state *state, struct block *block)
{
struct opcode *list = block->opcode_list;
u32 known = BIT(0);
u32 values[32] = { 0 };
unsigned int i;
- int reader;
for (i = 0; i < block->nb_ops; i++) {
prev = op;
break;
case OP_LUI:
- if (!(op->flags & LIGHTREC_SYNC) &&
- (known & BIT(op->i.rt)) &&
- values[op->i.rt] == op->i.imm << 16) {
- pr_debug("Converting duplicated LUI to NOP\n");
- op->opcode = 0x0;
- }
-
- if (op->i.imm != 0 || op->i.rt == 0)
- break;
-
- reader = find_next_reader(list, i + 1, op->i.rt);
- if (reader > 0 &&
- (opcode_writes_register(list[reader].c, op->i.rt) ||
- reg_is_dead(list, reader, op->i.rt))) {
-
- pr_debug("Removing useless LUI 0x0\n");
-
- if (list[reader].i.rs == op->i.rt)
- list[reader].i.rs = 0;
- if (list[reader].i.op == OP_SPECIAL &&
- list[reader].i.rt == op->i.rt)
- list[reader].i.rt = 0;
- op->opcode = 0x0;
- }
+ lightrec_modify_lui(block, i);
+ lightrec_remove_useless_lui(block, i, known, values);
break;
/* Transform ORI/ADDI/ADDIU with imm #0 or ORR/ADD/ADDU/SUB/SUBU
static int lightrec_flag_io(struct lightrec_state *state, struct block *block)
{
- const struct lightrec_mem_map *map;
- struct opcode *prev2, *prev = NULL, *list = NULL;
+ struct opcode *prev = NULL, *list = NULL;
+ enum psx_map psx_map;
u32 known = BIT(0);
u32 values[32] = { 0 };
unsigned int i;
- u32 val;
+ u32 val, kunseg_val;
for (i = 0; i < block->nb_ops; i++) {
- prev2 = prev;
prev = list;
list = &block->opcode_list[i];
case OP_LWR:
case OP_LWC2:
if (OPT_FLAG_IO && (known & BIT(list->i.rs))) {
- if (prev && prev->i.op == OP_LUI &&
- !(prev2 && has_delay_slot(prev2->c)) &&
- prev->i.rt == list->i.rs &&
- list->i.rt == list->i.rs &&
- prev->i.imm & 0x8000) {
- pr_debug("Convert LUI at offset 0x%x to kuseg\n",
- i - 1 << 2);
-
- val = kunseg(prev->i.imm << 16);
- prev->i.imm = val >> 16;
- values[list->i.rs] = val;
- }
-
val = values[list->i.rs] + (s16) list->i.imm;
- map = lightrec_get_map(state, NULL, kunseg(val));
-
- if (!map || map->ops ||
- map == &state->maps[PSX_MAP_PARALLEL_PORT]) {
- pr_debug("Flagging opcode %u as I/O access\n",
- i);
- list->flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
- break;
- }
-
- if (val - map->pc < map->length)
- list->flags |= LIGHTREC_NO_MASK;
-
- if (map == &state->maps[PSX_MAP_KERNEL_USER_RAM]) {
+ kunseg_val = kunseg(val);
+ psx_map = lightrec_get_map_idx(state, kunseg_val);
+
+ switch (psx_map) {
+ case PSX_MAP_KERNEL_USER_RAM:
+ if (val == kunseg_val)
+ list->flags |= LIGHTREC_NO_MASK;
+ /* fall-through */
+ case PSX_MAP_MIRROR1:
+ case PSX_MAP_MIRROR2:
+ case PSX_MAP_MIRROR3:
pr_debug("Flaging opcode %u as RAM access\n", i);
list->flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_RAM);
- } else if (map == &state->maps[PSX_MAP_BIOS]) {
+ break;
+ case PSX_MAP_BIOS:
pr_debug("Flaging opcode %u as BIOS access\n", i);
list->flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_BIOS);
- } else if (map == &state->maps[PSX_MAP_SCRATCH_PAD]) {
+ break;
+ case PSX_MAP_SCRATCH_PAD:
pr_debug("Flaging opcode %u as scratchpad access\n", i);
list->flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_SCRATCH);
+
+ /* Consider that we're never going to run code from
+ * the scratchpad. */
+ list->flags |= LIGHTREC_NO_INVALIDATE;
+ break;
+ default:
+ pr_debug("Flagging opcode %u as I/O access\n",
+ i);
+ list->flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
+ break;
}
}
default: /* fall-through */
notaz.gp2x.de / pcsx_rearmed.git / blobdiff