-#include "../sh2.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
-void sh2_execute(SH2 *sh2, int cycles)
+#include "sh2.h"
+#include "compiler.h"
+#include "../drc/cmn.h"
+
+#define BLOCK_CYCLE_LIMIT 100
+
+typedef enum {
+ SHR_R0 = 0, SHR_R15 = 15,
+ SHR_PC, SHR_PPC, SHR_PR, SHR_SR,
+ SHR_GBR, SHR_VBR, SHR_MACH, SHR_MACL,
+} sh2_reg_e;
+
+typedef struct block_desc_ {
+ u32 addr; // SH2 PC address
+ void *tcache_ptr; // translated block for above PC
+ struct block_desc_ *next; // next block with the same PC hash
+} block_desc;
+
+#define MAX_BLOCK_COUNT 1024
+static block_desc *block_table;
+static int block_count;
+
+#define MAX_HASH_ENTRIES 1024
+#define HASH_MASK (MAX_HASH_ENTRIES - 1)
+
+#ifdef DRC_DEBUG
+#include "mame/sh2dasm.h"
+#include <platform/linux/host_dasm.h>
+static void *tcache_dsm_ptr = tcache;
+#endif
+
+static void *tcache_ptr;
+
+#include "../drc/emit_x86.c"
+
+extern void sh2_drc_entry(SH2 *sh2, void *block);
+extern void sh2_drc_exit(void);
+
+// tmp
+extern void __attribute__((regparm(2))) sh2_do_op(SH2 *sh2, int opcode);
+
+static void *dr_find_block(block_desc *tab, u32 addr)
+{
+ for (tab = tab->next; tab != NULL; tab = tab->next)
+ if (tab->addr == addr)
+ break;
+
+ if (tab != NULL)
+ return tab->tcache_ptr;
+
+ printf("block miss for %08x\n", addr);
+ return NULL;
+}
+
+static block_desc *dr_add_block(u32 addr, void *tcache_ptr)
+{
+ block_desc *bd;
+
+ if (block_count == MAX_BLOCK_COUNT) {
+ // FIXME: flush cache instead
+ printf("block descriptor overflow\n");
+ exit(1);
+ }
+
+ bd = &block_table[block_count];
+ bd->addr = addr;
+ bd->tcache_ptr = tcache_ptr;
+ block_count++;
+
+ return bd;
+}
+
+#define HASH_FUNC(hash_tab, addr) \
+ ((block_desc **)(hash_tab))[(addr) & HASH_MASK]
+
+// ---------------------------------------------------------------
+
+static void emit_move_r_imm32(sh2_reg_e dst, u32 imm)
{
+ int host_dst = reg_map_g2h[dst];
+ int tmp = 0;
+
+ if (host_dst != -1)
+ tmp = host_dst;
+ emith_move_r_imm(tmp, imm);
+ if (host_dst == -1)
+ emith_ctx_write(tmp, dst * 4);
+}
+
+static void emit_move_r_r(sh2_reg_e dst, sh2_reg_e src)
+{
+ int host_dst = reg_map_g2h[dst], host_src = reg_map_g2h[src];
+ int tmp = 0;
+
+ if (host_dst != -1 && host_src != -1) {
+ emith_move_r_r(host_dst, host_src);
+ return;
+ }
+
+ if (host_src != -1)
+ tmp = host_src;
+ if (host_dst != -1)
+ tmp = host_dst;
+
+ if (host_src == -1)
+ emith_ctx_read(tmp, src * 4);
+ if (host_dst == -1)
+ emith_ctx_write(tmp, dst * 4);
+}
+
+static void emit_braf(sh2_reg_e reg, u32 pc)
+{
+ int host_reg = reg_map_g2h[reg];
+ if (host_reg == -1) {
+ emith_ctx_read(0, reg * 4);
+ } else
+ emith_move_r_r(0, host_reg);
+ emith_add_r_imm(0, pc);
+
+ emith_ctx_write(0, SHR_PC * 4);
+}
+
+// FIXME: this is broken, delayed insn shouldn't affect branch
+#define DELAYED_OP \
+ if (delayed_op < 0) { \
+ delayed_op = op; \
+ goto next_op; \
+ } \
+ delayed_op = -1; \
+ pc -= 2 /* adjust back */
+
+/*
+static int sh2_translate_op4(int op)
+{
+ switch (op & 0x000f)
+ {
+ case 0x0b:
+ default:
+ emith_pass_arg(2, sh2, op);
+ emith_call(sh2_do_op);
+ break;
+ }
+
+ return 0;
+}
+*/
+
+static void *sh2_translate(SH2 *sh2, block_desc *other_block)
+{
+ void *block_entry = tcache_ptr;
+ block_desc *this_block;
unsigned int pc = sh2->pc;
- int op;
+ int op, delayed_op = -1;
+ int cycles = 0;
+ u32 tmp;
+
+ this_block = dr_add_block(pc, block_entry);
+ if (other_block != NULL) {
+ printf("hash collision between %08x and %08x\n", pc, other_block->addr);
+ this_block->next = other_block;
+ }
+ HASH_FUNC(sh2->pc_hashtab, pc) = this_block;
+
+#ifdef DRC_DEBUG
+ printf("== %csh2 block #%d %08x %p\n", sh2->is_slave ? 's' : 'm',
+ block_count, pc, block_entry);
+#endif
+
+ while (cycles < BLOCK_CYCLE_LIMIT)
+ {
+ if (delayed_op >= 0)
+ op = delayed_op;
+ else {
+next_op:
+ op = p32x_sh2_read16(pc, sh2->is_slave);
+
+#ifdef DRC_DEBUG
+ {
+ char buff[64];
+ DasmSH2(buff, pc, op);
+ printf("%08x %04x %s\n", pc, op, buff);
+ }
+#endif
+ }
+
+ pc += 2;
+ cycles++;
+
+ switch ((op >> 12) & 0x0f)
+ {
+ case 0x00:
+ // RTS 0000000000001011
+ if (op == 0x000b) {
+ DELAYED_OP;
+ emit_move_r_r(SHR_PC, SHR_PR);
+ cycles++;
+ goto end_block;
+ }
+ // RTE 0000000000101011
+ if (op == 0x002b) {
+ DELAYED_OP;
+ cycles++;
+ //emit_move_r_r(SHR_PC, SHR_PR);
+ emit_move_r_imm32(SHR_PC, pc - 4);
+ emith_pass_arg(2, sh2, op);
+ emith_call(sh2_do_op);
+ goto end_block;
+ }
+ // BRAF Rm 0000mmmm00100011
+ if (op == 0x0023) {
+ DELAYED_OP;
+ cycles++;
+ emit_braf((op >> 8) & 0x0f, pc);
+ goto end_block;
+ }
+ // BSRF Rm 0000mmmm00000011
+ if (op == 0x0003) {
+ DELAYED_OP;
+ emit_move_r_imm32(SHR_PR, pc);
+ emit_braf((op >> 8) & 0x0f, pc);
+ cycles++;
+ goto end_block;
+ }
+ goto default_;
+
+ case 0x04:
+ // JMP @Rm 0100mmmm00101011
+ if ((op & 0xff) == 0x2b) {
+ DELAYED_OP;
+ emit_move_r_r(SHR_PC, (op >> 8) & 0x0f);
+ cycles++;
+ goto end_block;
+ }
+ // JSR @Rm 0100mmmm00001011
+ if ((op & 0xff) == 0x0b) {
+ DELAYED_OP;
+ emit_move_r_imm32(SHR_PR, pc);
+ emit_move_r_r(SHR_PC, (op >> 8) & 0x0f);
+ cycles++;
+ goto end_block;
+ }
+ goto default_;
+
+ case 0x08: {
+ int adj = 2;
+ switch (op & 0x0f00) {
+ // BT/S label 10001101dddddddd
+ case 0x0d00:
+ // BF/S label 10001111dddddddd
+ case 0x0f00:
+ DELAYED_OP;
+ cycles--;
+ adj = 0;
+ // fallthrough
+ // BT label 10001001dddddddd
+ case 0x0900:
+ // BF label 10001011dddddddd
+ case 0x0b00:
+ cycles += 2;
+ emit_move_r_imm32(SHR_PC, pc);
+ emith_test_t();
+ tmp = ((signed int)(op << 24) >> 23);
+ EMIT_CONDITIONAL(emit_move_r_imm32(SHR_PC, pc + tmp + adj), (op & 0x0200) ? 1 : 0);
+ goto end_block;
+ }
+ goto default_;
+ }
+
+ case 0x0a:
+ // BRA label 1010dddddddddddd
+ DELAYED_OP;
+ do_bra:
+ tmp = ((signed int)(op << 20) >> 19);
+ emit_move_r_imm32(SHR_PC, pc + tmp);
+ cycles++;
+ goto end_block;
+
+ case 0x0b:
+ // BSR label 1011dddddddddddd
+ DELAYED_OP;
+ emit_move_r_imm32(SHR_PR, pc);
+ goto do_bra;
+
+ default:
+ default_:
+ emit_move_r_imm32(SHR_PC, pc - 2);
+ emith_pass_arg(2, sh2, op);
+ emith_call(sh2_do_op);
+ break;
+ }
+
+#ifdef DRC_DEBUG
+ host_dasm(tcache_dsm_ptr, (char *)tcache_ptr - (char *)tcache_dsm_ptr);
+ tcache_dsm_ptr = tcache_ptr;
+#endif
+ }
+
+end_block:
+ if ((char *)tcache_ptr - (char *)tcache > DRC_TCACHE_SIZE) {
+ printf("tcache overflow!\n");
+ fflush(stdout);
+ exit(1);
+ }
+
+ if (reg_map_g2h[SHR_SR] == -1) {
+ emith_ctx_sub(cycles << 12, SHR_SR * 4);
+ } else
+ emith_sub_r_imm(reg_map_g2h[SHR_SR], cycles << 12);
+ emith_jump(sh2_drc_exit);
+
+#ifdef DRC_DEBUG
+ host_dasm(tcache_dsm_ptr, (char *)tcache_ptr - (char *)tcache_dsm_ptr);
+ tcache_dsm_ptr = tcache_ptr;
+#endif
+ return block_entry;
+
+unimplemented:
+ // last op
+#ifdef DRC_DEBUG
+ host_dasm(tcache_dsm_ptr, (char *)tcache_ptr - (char *)tcache_dsm_ptr);
+ tcache_dsm_ptr = tcache_ptr;
+#endif
+ exit(1);
+}
+
+void __attribute__((noinline)) sh2_drc_dispatcher(SH2 *sh2)
+{
+ while (((signed int)sh2->sr >> 12) > 0)
+ {
+ block_desc *bd = HASH_FUNC(sh2->pc_hashtab, sh2->pc);
+ void *block = NULL;
+
+ if (bd != NULL) {
+ if (bd->addr == sh2->pc)
+ block = bd->tcache_ptr;
+ else
+ block = dr_find_block(bd, sh2->pc);
+ }
+
+ if (block == NULL)
+ block = sh2_translate(sh2, bd);
+
+#ifdef DRC_DEBUG
+ printf("= %csh2 enter %08x %p\n", sh2->is_slave ? 's' : 'm', sh2->pc, block);
+#endif
+ sh2_drc_entry(sh2, block);
+ }
+}
+
+void sh2_execute(SH2 *sh2, int cycles)
+{
+ sh2->cycles_aim += cycles;
+ cycles = sh2->cycles_aim - sh2->cycles_done;
+
+ // cycles are kept in SHR_SR unused bits (upper 20)
+ sh2->sr &= 0x3f3;
+ sh2->sr |= cycles << 12;
+ sh2_drc_dispatcher(sh2);
+
+ sh2->cycles_done += cycles - ((signed int)sh2->sr >> 12);
+}
+
+
+static int cmn_init_done;
+
+static int common_init(void)
+{
+ block_count = 0;
+ block_table = calloc(MAX_BLOCK_COUNT, sizeof(*block_table));
+ if (block_table == NULL)
+ return -1;
+
+ tcache_ptr = tcache;
+
+ cmn_init_done = 1;
+ return 0;
+}
+
+int sh2_drc_init(SH2 *sh2)
+{
+ if (!cmn_init_done) {
+ int ret = common_init();
+ if (ret)
+ return ret;
+ }
+
+ assert(sh2->pc_hashtab == NULL);
+ sh2->pc_hashtab = calloc(sizeof(sh2->pc_hashtab[0]), MAX_HASH_ENTRIES);
+ if (sh2->pc_hashtab == NULL)
+ return -1;
- op = p32x_sh2_read16(pc);
+ return 0;
}
notaz.gp2x.de / picodrive.git / blobdiff