#define CONTEXT_REG xBP
-#define IOP_JMP 0xeb
-#define IOP_JO 0x70
-#define IOP_JNO 0x71
-#define IOP_JB 0x72
-#define IOP_JAE 0x73
-#define IOP_JE 0x74
-#define IOP_JNE 0x75
-#define IOP_JBE 0x76
-#define IOP_JA 0x77
-#define IOP_JS 0x78
-#define IOP_JNS 0x79
-#define IOP_JL 0x7c
-#define IOP_JGE 0x7d
-#define IOP_JLE 0x7e
-#define IOP_JG 0x7f
+#define ICOND_JO 0x00
+#define ICOND_JNO 0x01
+#define ICOND_JB 0x02
+#define ICOND_JAE 0x03
+#define ICOND_JE 0x04
+#define ICOND_JNE 0x05
+#define ICOND_JBE 0x06
+#define ICOND_JA 0x07
+#define ICOND_JS 0x08
+#define ICOND_JNS 0x09
+#define ICOND_JL 0x0c
+#define ICOND_JGE 0x0d
+#define ICOND_JLE 0x0e
+#define ICOND_JG 0x0f
+
+#define IOP_JMP 0xeb
// unified conditions (we just use rel8 jump instructions for x86)
-#define DCOND_EQ IOP_JE
-#define DCOND_NE IOP_JNE
-#define DCOND_MI IOP_JS // MInus
-#define DCOND_PL IOP_JNS // PLus or zero
-#define DCOND_HI IOP_JA // higher (unsigned)
-#define DCOND_HS IOP_JAE // higher || same (unsigned)
-#define DCOND_LO IOP_JB // lower (unsigned)
-#define DCOND_LS IOP_JBE // lower || same (unsigned)
-#define DCOND_GE IOP_JGE // greater || equal (signed)
-#define DCOND_GT IOP_JG // greater (signed)
-#define DCOND_LE IOP_JLE // less || equal (signed)
-#define DCOND_LT IOP_JL // less (signed)
-#define DCOND_VS IOP_JO // oVerflow Set
-#define DCOND_VC IOP_JNO // oVerflow Clear
+#define DCOND_EQ ICOND_JE
+#define DCOND_NE ICOND_JNE
+#define DCOND_MI ICOND_JS // MInus
+#define DCOND_PL ICOND_JNS // PLus or zero
+#define DCOND_HI ICOND_JA // higher (unsigned)
+#define DCOND_HS ICOND_JAE // higher || same (unsigned)
+#define DCOND_LO ICOND_JB // lower (unsigned)
+#define DCOND_LS ICOND_JBE // lower || same (unsigned)
+#define DCOND_GE ICOND_JGE // greater || equal (signed)
+#define DCOND_GT ICOND_JG // greater (signed)
+#define DCOND_LE ICOND_JLE // less || equal (signed)
+#define DCOND_LT ICOND_JL // less (signed)
+#define DCOND_VS ICOND_JO // oVerflow Set
+#define DCOND_VC ICOND_JNO // oVerflow Clear
#define EMIT_PTR(ptr, val, type) \
*(type *)(ptr) = val
tcache_ptr += 2
#define JMP8_EMIT(op, ptr) \
- EMIT_PTR(ptr, op, u8); \
+ EMIT_PTR(ptr, 0x70|(op), u8); \
+ EMIT_PTR(ptr + 1, (tcache_ptr - (ptr+2)), u8)
+
+#define JMP8_EMIT_NC(ptr) \
+ EMIT_PTR(ptr, IOP_JMP, u8); \
EMIT_PTR(ptr + 1, (tcache_ptr - (ptr+2)), u8)
// _r_r
#define emith_move_r_imm_s8(r, imm) \
emith_move_r_imm(r, (u32)(signed int)(signed char)(imm))
-#define emith_arith_r_imm(op, r, imm) { \
+#define emith_arith_r_imm(op, r, imm) do { \
EMIT_OP_MODRM(0x81, 3, op, r); \
EMIT(imm, u32); \
-}
+} while (0)
// 2 - adc, 3 - sbb
#define emith_add_r_imm(r, imm) \
#define emith_cmp_r_imm(r, imm) \
emith_arith_r_imm(7, r, imm)
-#define emith_tst_r_imm(r, imm) { \
+#define emith_tst_r_imm(r, imm) do { \
EMIT_OP_MODRM(0xf7, 3, 0, r); \
EMIT(imm, u32); \
-}
+} while (0)
// fake
#define emith_bic_r_imm(r, imm) \
#define emith_and_r_r_imm(d, s, imm) { \
if (d != s) \
emith_move_r_r(d, s); \
- emith_and_r_imm(d, imm) \
+ emith_and_r_imm(d, imm); \
}
// shift
} while (0)
#define emith_jump(ptr) { \
- u32 disp = (u32)ptr - ((u32)tcache_ptr + 5); \
+ u32 disp = (u32)(ptr) - ((u32)tcache_ptr + 5); \
EMIT_OP(0xe9); \
EMIT(disp, u32); \
}
+#define emith_jump_cond(cond, ptr) { \
+ u32 disp = (u32)(ptr) - ((u32)tcache_ptr + 6); \
+ EMIT(0x0f, u8); \
+ EMIT_OP(0x80 | (cond)); \
+ EMIT(disp, u32); \
+}
+
+#define emith_jump_patchable(cond) \
+ emith_jump_cond(cond, 0)
+
+#define emith_jump_patch(ptr, target) do { \
+ u32 disp = (u32)(target) - ((u32)(ptr) + 6); \
+ EMIT_PTR((u8 *)(ptr) + 2, disp, u32); \
+} while (0)
+
#define emith_call(ptr) { \
- u32 disp = (u32)ptr - ((u32)tcache_ptr + 5); \
+ u32 disp = (u32)(ptr) - ((u32)tcache_ptr + 5); \
EMIT_OP(0xe8); \
EMIT(disp, u32); \
}
EMIT_OP(0xc3); /* ret */\
}
-#define emith_sh2_test_t() { \
- int t = rcache_get_reg(SHR_SR, RC_GR_READ); \
- EMIT(0x66, u8); \
- EMIT_OP_MODRM(0xf7, 3, 0, t); \
- EMIT(0x01, u16); /* test <reg>, word 1 */ \
-}
-
#define emith_sh2_dtbf_loop() { \
u8 *jmp0; /* negative cycles check */ \
u8 *jmp1; /* unsinged overflow check */ \
emith_asr(tmp_, cr, 2+12); \
JMP8_POS(jmp0); /* no negative cycles */ \
emith_move_r_imm(tmp_, 0); \
- JMP8_EMIT(IOP_JNS, jmp0); \
+ JMP8_EMIT(ICOND_JNS, jmp0); \
emith_and_r_imm(cr, 0xffe); \
emith_subf_r_r(rn, tmp_); \
JMP8_POS(jmp1); /* no overflow */ \
emith_or_r_r(cr, rn); \
emith_or_r_imm(cr, 1); \
emith_move_r_imm(rn, 0); \
- JMP8_EMIT(IOP_JA, jmp1); \
+ JMP8_EMIT(ICOND_JA, jmp1); \
rcache_free_tmp(tmp_); \
}
-#define emith_write_sr(srcr) { \
+#define emith_write_sr(sr, srcr) { \
int tmp_ = rcache_get_tmp(); \
- int srr = rcache_get_reg(SHR_SR, RC_GR_RMW); \
- emith_clear_msb(tmp_, srcr, 20); \
- emith_bic_r_imm(srr, 0xfff); \
- emith_or_r_r(srr, tmp_); \
+ emith_clear_msb(tmp_, srcr, 22); \
+ emith_bic_r_imm(sr, 0x3ff); \
+ emith_or_r_r(sr, tmp_); \
rcache_free_tmp(tmp_); \
}
JMP8_POS(jmp0); /* je do_sub */ \
emith_add_r_r(rn, rm); \
JMP8_POS(jmp1); /* jmp done */ \
- JMP8_EMIT(IOP_JE, jmp0); /* do_sub: */ \
+ JMP8_EMIT(ICOND_JE, jmp0); /* do_sub: */ \
emith_sub_r_r(rn, rm); \
- JMP8_EMIT(IOP_JMP, jmp1);/* done: */ \
+ JMP8_EMIT_NC(jmp1); /* done: */ \
emith_setc(tmp_); \
EMIT_OP_MODRM(0x31, 3, tmp_, sr); /* T = Q1 ^ Q2 */ \
rcache_free_tmp(tmp_); \
#define I 0x000000f0
#define Q 0x00000100
#define M 0x00000200
+#define T_save 0x00000800
#define Q_SHIFT 8
#define M_SHIFT 9
typedef struct block_desc_ {
- u32 addr; // SH2 PC address
- u32 end_addr; // TODO rm?
- void *tcache_ptr; // translated block for above PC
- struct block_desc_ *next; // next block with the same PC hash
+ u32 addr; // SH2 PC address
+ u32 end_addr; // TODO rm?
+ void *tcache_ptr; // translated block for above PC
+ struct block_desc_ *next; // next block with the same PC hash
#if (DRC_DEBUG & 1)
int refcount;
#endif
#define HASH_MASK (MAX_HASH_ENTRIES - 1)
static void **hash_table;
+#define HASH_FUNC(hash_tab, addr) \
+ ((block_desc **)(hash_tab))[(addr) & HASH_MASK]
+
static void REGPARM(2) (*sh2_drc_entry)(const void *block, SH2 *sh2);
static void (*sh2_drc_exit)(void);
*blk_id = *bcount;
(*bcount)++;
+ if ((addr & 0xc6000000) == 0x02000000) { // ROM
+ bd->next = HASH_FUNC(hash_table, addr);
+ HASH_FUNC(hash_table, addr) = bd;
+#if (DRC_DEBUG & 1)
+ if (bd->next != NULL) {
+ printf(" hash collision with %08x\n", bd->next->addr);
+ hash_collisions++;
+ }
+#endif
+ }
+
return bd;
}
-#define HASH_FUNC(hash_tab, addr) \
- ((block_desc **)(hash_tab))[(addr) & HASH_MASK]
+int find_in_array(u32 *array, size_t size, u32 what)
+{
+ size_t i;
+ for (i = 0; i < size; i++)
+ if (what == array[i])
+ return i;
+
+ return -1;
+}
// ---------------------------------------------------------------
}
#define DELAYED_OP \
- delayed_op = 2
+ drcf.delayed_op = 2
+
+#define DELAY_SAVE_T(sr) { \
+ emith_bic_r_imm(sr, T_save); \
+ emith_tst_r_imm(sr, T); \
+ EMITH_SJMP_START(DCOND_EQ); \
+ emith_or_r_imm_c(DCOND_NE, sr, T_save); \
+ EMITH_SJMP_END(DCOND_EQ); \
+ drcf.use_saved_t = 1; \
+}
#define CHECK_UNHANDLED_BITS(mask) { \
if ((op & (mask)) != 0) \
if (GET_Fx() >= n) \
goto default_
-static void *sh2_translate(SH2 *sh2, block_desc *other_block)
+#define MAX_LOCAL_BRANCHES 16
+
+// op_flags: data from 1st pass
+#define OP_FLAGS(pc) op_flags[((pc) - base_pc) / 2]
+#define OF_DELAY_OP (1 << 0)
+
+static void *sh2_translate(SH2 *sh2, int tcache_id)
{
+ // XXX: maybe use structs instead?
+ void *branch_target_ptr[MAX_LOCAL_BRANCHES];
+ u32 branch_target_pc[MAX_LOCAL_BRANCHES];
+ int branch_target_count = 0;
+ void *branch_patch_ptr[MAX_LOCAL_BRANCHES];
+ u32 branch_patch_pc[MAX_LOCAL_BRANCHES];
+ int branch_patch_count = 0;
+ int branch_patch_cond = -1;
+ u8 op_flags[BLOCK_CYCLE_LIMIT + 1];
+ struct {
+ u32 delayed_op:2;
+ u32 test_irq:1;
+ u32 use_saved_t:1; // delayed op modifies T
+ } drcf = { 0, };
+
void *block_entry;
block_desc *this_block;
- unsigned int pc = sh2->pc;
- int op, delayed_op = 0, test_irq = 0;
- int tcache_id = 0, blkid = 0;
- int cycles = 0;
- u32 tmp, tmp2, tmp3, tmp4, sr;
+ u32 pc, base_pc, end_pc; // PC of current, first, last insn
+ int blkid_main = 0;
+ u32 tmp, tmp2;
+ int cycles;
+ int op;
+ int i;
+
+ base_pc = sh2->pc;
// validate PC
- tmp = sh2->pc >> 29;
- if ((tmp != 0 && tmp != 1 && tmp != 6) || sh2->pc == 0) {
- printf("invalid PC, aborting: %08x\n", sh2->pc);
+ tmp = base_pc >> 29;
+ if ((tmp != 0 && tmp != 1 && tmp != 6) || base_pc == 0) {
+ printf("invalid PC, aborting: %08x\n", base_pc);
// FIXME: be less destructive
exit(1);
}
- if ((sh2->pc & 0xe0000000) == 0xc0000000 || (sh2->pc & ~0xfff) == 0) {
- // data_array, BIOS have separate tcache (shared)
- tcache_id = 1 + sh2->is_slave;
- }
-
tcache_ptr = tcache_ptrs[tcache_id];
- this_block = dr_add_block(pc, tcache_id, &blkid);
+ this_block = dr_add_block(base_pc, tcache_id, &blkid_main);
+ // predict tcache overflow
tmp = tcache_ptr - tcache_bases[tcache_id];
- if (tmp > tcache_sizes[tcache_id] - MAX_BLOCK_SIZE || this_block == NULL) {
- flush_tcache(tcache_id);
- tcache_ptr = tcache_ptrs[tcache_id];
- other_block = NULL; // also gone too due to flush
- this_block = dr_add_block(pc, tcache_id, &blkid);
+ if (tmp > tcache_sizes[tcache_id] - MAX_BLOCK_SIZE || this_block == NULL)
+ return NULL;
+
+ block_entry = tcache_ptr;
+ dbg(1, "== %csh2 block #%d,%d %08x -> %p", sh2->is_slave ? 's' : 'm',
+ tcache_id, blkid_main, base_pc, block_entry);
+
+ // 1st pass: scan forward for local branches
+ memset(op_flags, 0, sizeof(op_flags));
+ for (cycles = 0, pc = base_pc; cycles < BLOCK_CYCLE_LIMIT; cycles++, pc += 2) {
+ op = p32x_sh2_read16(pc, sh2);
+ if ((op & 0xf000) == 0xa000 || (op & 0xf000) == 0xb000) { // BRA, BSR
+ pc += 2;
+ OP_FLAGS(pc) |= OF_DELAY_OP;
+ break;
+ }
+ if ((op & 0xf000) == 0) {
+ op &= 0xff;
+ if (op == 0x23 || op == 0x03 || op == 0x0b) { // BRAF, BSRF, RTS
+ pc += 2;
+ OP_FLAGS(pc) |= OF_DELAY_OP;
+ break;
+ }
+ continue;
+ }
+ if ((op & 0xf0df) == 0x400b) { // JMP, JSR
+ pc += 2;
+ OP_FLAGS(pc) |= OF_DELAY_OP;
+ break;
+ }
+ if ((op & 0xf900) == 0x8900) { // BT(S), BF(S)
+ signed int offs = ((signed int)(op << 24) >> 23);
+ if (op & 0x0400)
+ OP_FLAGS(pc + 2) |= OF_DELAY_OP;
+ branch_target_pc[branch_target_count++] = pc + offs + 4;
+ if (branch_target_count == MAX_LOCAL_BRANCHES) {
+ printf("warning: branch target overflow\n");
+ // will only spawn additional blocks
+ break;
+ }
+ }
}
- this_block->next = other_block;
- if ((sh2->pc & 0xc6000000) == 0x02000000) // ROM
- HASH_FUNC(hash_table, pc) = this_block;
+ end_pc = pc;
- block_entry = tcache_ptr;
-#if (DRC_DEBUG & 1)
- printf("== %csh2 block #%d,%d %08x -> %p\n", sh2->is_slave ? 's' : 'm',
- tcache_id, block_counts[tcache_id], pc, block_entry);
- if (other_block != NULL) {
- printf(" hash collision with %08x\n", other_block->addr);
- hash_collisions++;
+ // clean branch_targets that are not really local,
+ // and that land on delay slots
+ for (i = 0, tmp = 0; i < branch_target_count; i++) {
+ pc = branch_target_pc[i];
+ if (base_pc <= pc && pc <= end_pc && !(OP_FLAGS(pc) & OF_DELAY_OP))
+ branch_target_pc[tmp++] = branch_target_pc[i];
}
-#endif
+ branch_target_count = tmp;
+ memset(branch_target_ptr, 0, sizeof(branch_target_ptr[0]) * branch_target_count);
- while (cycles < BLOCK_CYCLE_LIMIT || delayed_op)
+ // -------------------------------------------------
+ // 2nd pass: actual compilation
+ pc = base_pc;
+ for (cycles = 0; pc <= end_pc || drcf.delayed_op; )
{
- if (delayed_op > 0)
- delayed_op--;
+ u32 tmp3, tmp4, sr;
+
+ if (drcf.delayed_op > 0)
+ drcf.delayed_op--;
+
+ i = find_in_array(branch_target_pc, branch_target_count, pc);
+ if (i >= 0)
+ {
+ if (pc != sh2->pc)
+ {
+ /* make "subblock" - just a mid-block entry */
+ block_desc *subblock;
+ u16 *drcblk;
+ int blkid;
+
+ sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ emith_sub_r_imm(sr, cycles << 12);
+ cycles = 0;
+ rcache_flush();
+ do_host_disasm(tcache_id);
+
+ subblock = dr_add_block(pc, tcache_id, &blkid);
+ if (subblock == NULL)
+ return NULL;
+ subblock->end_addr = pc;
+
+ if (tcache_id != 0) { // data array, BIOS
+ drcblk = Pico32xMem->drcblk_da[sh2->is_slave];
+ drcblk += (pc & 0x00fff) >> SH2_DRCBLK_DA_SHIFT;
+ *drcblk = (blkid << 1) | 1;
+ } else if ((this_block->addr & 0xc7fc0000) == 0x06000000) { // DRAM
+ drcblk = Pico32xMem->drcblk_ram;
+ drcblk += (pc & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT;
+ *drcblk = (blkid << 1) | 1;
+ }
+
+ dbg(1, "=== %csh2 subblock #%d,%d %08x -> %p", sh2->is_slave ? 's' : 'm',
+ tcache_id, blkid, pc, tcache_ptr);
+ }
+ branch_target_ptr[i] = tcache_ptr;
+
+ // must update PC
+ emit_move_r_imm32(SHR_PC, pc);
+ rcache_clean();
+
+ // check cycles
+ sr = rcache_get_reg(SHR_SR, RC_GR_READ);
+ emith_cmp_r_imm(sr, 0);
+ emith_jump_cond(DCOND_LE, sh2_drc_exit);
+ }
op = p32x_sh2_read16(pc, sh2);
tmp3 = rcache_get_reg(tmp2, RC_GR_READ);
emith_move_r_r(tmp, tmp3);
if (tmp2 == SHR_SR)
- emith_clear_msb(tmp, tmp, 20); // reserved bits defined by ISA as 0
+ emith_clear_msb(tmp, tmp, 22); // reserved bits defined by ISA as 0
goto end_op;
case 0x03:
CHECK_UNHANDLED_BITS(0xd0);
// BRAF Rm 0000mmmm00100011
// BSRF Rm 0000mmmm00000011
DELAYED_OP;
- if (!(op & 0x20))
- emit_move_r_imm32(SHR_PR, pc + 2);
- tmp = rcache_get_reg(SHR_PPC, RC_GR_WRITE);
+ tmp = rcache_get_reg(SHR_PC, RC_GR_WRITE);
tmp2 = rcache_get_reg(GET_Rn(), RC_GR_READ);
emith_move_r_r(tmp, tmp2);
- emith_add_r_imm(tmp, pc + 2);
+ if (op & 0x20)
+ emith_add_r_imm(tmp, pc + 2);
+ else { // BSRF
+ tmp3 = rcache_get_reg(SHR_PR, RC_GR_WRITE);
+ emith_move_r_imm(tmp3, pc + 2);
+ emith_add_r_r(tmp, tmp3);
+ }
cycles++;
goto end_op;
case 0x04: // MOV.B Rm,@(R0,Rn) 0000nnnnmmmm0100
{
case 0: // CLRT 0000000000001000
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
break;
case 1: // SETT 0000000000011000
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_or_r_imm(sr, T);
break;
case 2: // CLRMAC 0000000000101000
case 1: // DIV0U 0000000000011001
CHECK_UNHANDLED_BITS(0xf00);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, M|Q|T);
break;
case 2: // MOVT Rn 0000nnnn00101001
{
case 0: // RTS 0000000000001011
DELAYED_OP;
- emit_move_r_r(SHR_PPC, SHR_PR);
+ emit_move_r_r(SHR_PC, SHR_PR);
cycles++;
break;
case 1: // SLEEP 0000000000011011
emit_move_r_imm32(SHR_PC, pc - 2);
tmp = rcache_get_reg(SHR_SR, RC_GR_RMW);
emith_clear_msb(tmp, tmp, 20); // clear cycles
- test_irq = 1;
+ drcf.test_irq = 1;
cycles = 1;
break;
case 2: // RTE 0000000000101011
// pop PC
rcache_get_reg_arg(0, SHR_SP);
tmp = emit_memhandler_read(2);
- tmp2 = rcache_get_reg(SHR_PPC, RC_GR_WRITE);
+ tmp2 = rcache_get_reg(SHR_PC, RC_GR_WRITE);
emith_move_r_r(tmp2, tmp);
rcache_free_tmp(tmp);
rcache_clean();
tmp = rcache_get_reg_arg(0, SHR_SP);
emith_add_r_imm(tmp, 4);
tmp = emit_memhandler_read(2);
- emith_write_sr(tmp);
+ sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ emith_write_sr(sr, tmp);
rcache_free_tmp(tmp);
tmp = rcache_get_reg(SHR_SP, RC_GR_RMW);
emith_add_r_imm(tmp, 4*2);
- test_irq = 1;
+ drcf.test_irq = 1;
cycles += 3;
break;
default:
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
tmp2 = rcache_get_reg(GET_Rn(), RC_GR_READ);
tmp3 = rcache_get_reg(GET_Rm(), RC_GR_READ);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, M|Q|T);
emith_tst_r_imm(tmp2, (1<<31));
EMITH_SJMP_START(DCOND_EQ);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
tmp2 = rcache_get_reg(GET_Rn(), RC_GR_READ);
tmp3 = rcache_get_reg(GET_Rm(), RC_GR_READ);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_tst_r_r(tmp2, tmp3);
emit_or_t_if_eq(sr);
tmp3 = rcache_get_reg(GET_Rm(), RC_GR_READ);
emith_eor_r_r_r(tmp, tmp2, tmp3);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_tst_r_imm(tmp, 0x000000ff);
emit_or_t_if_eq(tmp);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
tmp2 = rcache_get_reg(GET_Rn(), RC_GR_READ);
tmp3 = rcache_get_reg(GET_Rm(), RC_GR_READ);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_cmp_r_r(tmp2, tmp3);
switch (op & 0x07)
tmp2 = rcache_get_reg(GET_Rn(), RC_GR_RMW);
tmp3 = rcache_get_reg(GET_Rm(), RC_GR_READ);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_tpop_carry(sr, 0);
emith_adcf_r_r(tmp2, tmp2);
emith_tpush_carry(sr, 0); // keep Q1 in T for now
// add or sub, invert T if carry to get Q1 ^ Q2
// in: (Q ^ M) passed in Q, Q1 in T
emith_sh2_div1_step(tmp2, tmp3, sr);
- emith_bic_r_imm(sr, Q);
- emith_tst_r_imm(sr, M);
- EMITH_SJMP_START(DCOND_EQ);
- emith_or_r_imm_c(DCOND_NE, sr, Q); // Q = M
- EMITH_SJMP_END(DCOND_EQ);
- emith_tst_r_imm(sr, T);
- EMITH_SJMP_START(DCOND_EQ);
- emith_eor_r_imm_c(DCOND_NE, sr, Q); // Q = M ^ Q1 ^ Q2
- EMITH_SJMP_END(DCOND_EQ);
- emith_eor_r_imm(sr, T); // T = !(Q1 ^ Q2)
+ emith_bic_r_imm(sr, Q);
+ emith_tst_r_imm(sr, M);
+ EMITH_SJMP_START(DCOND_EQ);
+ emith_or_r_imm_c(DCOND_NE, sr, Q); // Q = M
+ EMITH_SJMP_END(DCOND_EQ);
+ emith_tst_r_imm(sr, T);
+ EMITH_SJMP_START(DCOND_EQ);
+ emith_eor_r_imm_c(DCOND_NE, sr, Q); // Q = M ^ Q1 ^ Q2
+ EMITH_SJMP_END(DCOND_EQ);
+ emith_eor_r_imm(sr, T); // T = !(Q1 ^ Q2)
goto end_op;
case 0x05: // DMULU.L Rm,Rn 0011nnnnmmmm0101
tmp = rcache_get_reg(GET_Rn(), RC_GR_READ);
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
tmp2 = rcache_get_reg(GET_Rm(), RC_GR_READ);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
if (op & 4) { // adc
emith_tpop_carry(sr, 0);
emith_adcf_r_r(tmp, tmp2);
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
tmp2 = rcache_get_reg(GET_Rm(), RC_GR_READ);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
if (op & 4) {
emith_addf_r_r(tmp, tmp2);
case 2: // SHAL Rn 0100nnnn00100000
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_tpop_carry(sr, 0); // dummy
emith_lslf(tmp, tmp, 1);
emith_tpush_carry(sr, 0);
}
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_subf_r_imm(tmp, 1);
emit_or_t_if_eq(sr);
case 2: // SHAR Rn 0100nnnn00100001
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_tpop_carry(sr, 0); // dummy
if (op & 0x20) {
emith_asrf(tmp, tmp, 1);
case 1: // CMP/PZ Rn 0100nnnn00010001
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_cmp_r_imm(tmp, 0);
EMITH_SJMP_START(DCOND_LT);
case 0x05: // ROTR Rn 0100nnnn00000101
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_tpop_carry(sr, 0); // dummy
if (op & 1) {
emith_rorf(tmp, tmp, 1);
case 0x25: // ROTCR Rn 0100nnnn00100101
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_tpop_carry(sr, 0);
if (op & 1) {
emith_rorcf(tmp);
case 0x15: // CMP/PL Rn 0100nnnn00010101
tmp = rcache_get_reg(GET_Rn(), RC_GR_RMW);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_cmp_r_imm(tmp, 0);
EMITH_SJMP_START(DCOND_LE);
rcache_get_reg_arg(0, GET_Rn());
tmp2 = emit_memhandler_read(2);
if (tmp == SHR_SR) {
- emith_write_sr(tmp2);
- test_irq = 1;
+ sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
+ emith_write_sr(sr, tmp2);
+ drcf.test_irq = 1;
} else {
tmp = rcache_get_reg(tmp, RC_GR_WRITE);
emith_move_r_r(tmp, tmp2);
DELAYED_OP;
if (!(op & 0x20))
emit_move_r_imm32(SHR_PR, pc + 2);
- emit_move_r_r(SHR_PPC, (op >> 8) & 0x0f);
+ emit_move_r_r(SHR_PC, (op >> 8) & 0x0f);
cycles++;
break;
case 1: // TAS.B @Rn 0100nnnn00011011
rcache_get_reg_arg(0, GET_Rn());
tmp = emit_memhandler_read(0);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_cmp_r_imm(tmp, 0);
emit_or_t_if_eq(sr);
goto default_;
}
if (tmp2 == SHR_SR) {
- emith_write_sr(tmp);
- test_irq = 1;
+ sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
+ emith_write_sr(sr, tmp);
+ drcf.test_irq = 1;
} else {
tmp2 = rcache_get_reg(tmp2, RC_GR_WRITE);
emith_move_r_r(tmp2, tmp);
break;
case 0x0a: // NEGC Rm,Rn 0110nnnnmmmm1010
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_tpop_carry(sr, 1);
emith_negcf_r_r(tmp2, tmp);
emith_tpush_carry(sr, 1);
tmp = rcache_get_tmp();
tmp2 = rcache_get_reg(0, RC_GR_READ);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_move_r_imm_s8(tmp, op & 0xff);
emith_bic_r_imm(sr, T);
emith_cmp_r_r(tmp2, tmp);
int jmp_cond = (op & 0x0200) ? DCOND_NE : DCOND_EQ;
int insn_cond = (op & 0x0200) ? DCOND_EQ : DCOND_NE;
signed int offs = ((signed int)(op << 24) >> 23);
- tmp = rcache_get_reg(delayed_op ? SHR_PPC : SHR_PC, RC_GR_WRITE);
- emith_move_r_imm(tmp, pc + (delayed_op ? 2 : 0));
- emith_sh2_test_t();
+ sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (find_in_array(branch_target_pc, branch_target_count, pc + offs + 2) >= 0) {
+ branch_patch_pc[branch_patch_count] = pc + offs + 2;
+ branch_patch_cond = insn_cond;
+ goto end_op;
+ }
+
+ // can't resolve branch, cause end of block
+ tmp = rcache_get_reg(SHR_PC, RC_GR_WRITE);
+ emith_move_r_imm(tmp, pc + (drcf.delayed_op ? 2 : 0));
+ emith_tst_r_imm(sr, T);
EMITH_SJMP_START(jmp_cond);
- if (!delayed_op)
+ if (!drcf.delayed_op)
offs += 2;
if (offs < 0) {
emith_sub_r_imm_c(insn_cond, tmp, -offs);
emith_add_r_imm_c(insn_cond, tmp, offs);
EMITH_SJMP_END(jmp_cond);
cycles += 2;
- if (!delayed_op)
+ if (!drcf.delayed_op)
goto end_block_btf;
goto end_op;
}}
DELAYED_OP;
do_bra:
tmp = ((signed int)(op << 20) >> 19);
- emit_move_r_imm32(SHR_PPC, pc + tmp + 2);
+ emit_move_r_imm32(SHR_PC, pc + tmp + 2);
cycles++;
break;
tmp = rcache_get_reg_arg(0, SHR_SP);
emith_add_r_imm(tmp, 4);
tmp = rcache_get_reg_arg(1, SHR_SR);
- emith_clear_msb(tmp, tmp, 20);
+ emith_clear_msb(tmp, tmp, 22);
emit_memhandler_write(2);
// push PC
rcache_get_reg_arg(0, SHR_SP);
case 0x0800: // TST #imm,R0 11001000iiiiiiii
tmp = rcache_get_reg(SHR_R0, RC_GR_READ);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_tst_r_imm(tmp, op & 0xff);
emit_or_t_if_eq(sr);
case 0x0c00: // TST.B #imm,@(R0,GBR) 11001100iiiiiiii
tmp = emit_indirect_indexed_read(SHR_R0, SHR_GBR, 0);
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ if (drcf.delayed_op)
+ DELAY_SAVE_T(sr);
emith_bic_r_imm(sr, T);
emith_tst_r_imm(tmp, op & 0xff);
emit_or_t_if_eq(sr);
}
end_op:
- if (delayed_op == 1)
- emit_move_r_r(SHR_PC, SHR_PPC);
+ // block-local conditional branch handling (with/without delay)
+ if (branch_patch_cond != -1 && drcf.delayed_op != 2) {
+ sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ // handle cycles
+ emith_sub_r_imm(sr, cycles << 12);
+ cycles = 0;
+ rcache_clean();
- if (test_irq && delayed_op != 2) {
- if (!delayed_op)
- emit_move_r_imm32(SHR_PC, pc);
- rcache_flush();
- emith_pass_arg_r(0, CONTEXT_REG);
- emith_call(sh2_test_irq);
- goto end_block_btf;
+ if (drcf.use_saved_t)
+ emith_tst_r_imm(sr, T_save);
+ else
+ emith_tst_r_imm(sr, T);
+ branch_patch_ptr[branch_patch_count] = tcache_ptr;
+ emith_jump_patchable(branch_patch_cond);
+
+ drcf.use_saved_t = 0;
+ branch_patch_cond = -1;
+ branch_patch_count++;
+ drcf.delayed_op = 0; // XXX: delayed_op ends block, so must override
+ if (branch_patch_count == MAX_LOCAL_BRANCHES) {
+ printf("too many local branches\n");
+ break;
+ }
}
- if (delayed_op == 1)
+ // test irq?
+ if (drcf.test_irq && drcf.delayed_op != 2)
+ break;
+ if (drcf.delayed_op == 1)
break;
do_host_disasm(tcache_id);
}
// delayed_op means some kind of branch - PC already handled
- if (!delayed_op)
+ if (!drcf.delayed_op)
emit_move_r_imm32(SHR_PC, pc);
+ if (drcf.test_irq) {
+ rcache_flush();
+ emith_pass_arg_r(0, CONTEXT_REG);
+ emith_call(sh2_test_irq);
+ }
+
end_block_btf:
this_block->end_addr = pc;
+ tmp = rcache_get_reg(SHR_SR, RC_GR_RMW);
+ emith_sub_r_imm(tmp, cycles << 12);
+ rcache_flush();
+ emith_jump(sh2_drc_exit);
+
+ // link local branches
+ for (i = 0; i < branch_patch_count; i++) {
+ void *target;
+ int t;
+ //printf("patch %08x %p\n", branch_patch_pc[i], branch_patch_ptr[i]);
+ t = find_in_array(branch_target_pc, branch_target_count, branch_patch_pc[i]);
+ if (branch_target_ptr[t] != NULL)
+ target = branch_target_ptr[t];
+ else {
+ // flush pc and go back to dispatcher (for now)
+ printf("stray branch to %08x %p\n", branch_patch_pc[i], tcache_ptr);
+ target = tcache_ptr;
+ emit_move_r_imm32(SHR_PC, branch_patch_pc[i]);
+ rcache_flush();
+ emith_jump(sh2_drc_exit);
+ }
+ emith_jump_patch(branch_patch_ptr[i], target);
+ }
+
// mark memory blocks as containing compiled code
- if ((sh2->pc & 0xe0000000) == 0xc0000000 || (sh2->pc & ~0xfff) == 0) {
+ if (tcache_id != 0) {
// data array, BIOS
u16 *drcblk = Pico32xMem->drcblk_da[sh2->is_slave];
- tmp = (this_block->addr & 0xfff) >> SH2_DRCBLK_DA_SHIFT;
+ tmp = (this_block->addr & 0xfff) >> SH2_DRCBLK_DA_SHIFT;
tmp2 = (this_block->end_addr & 0xfff) >> SH2_DRCBLK_DA_SHIFT;
- Pico32xMem->drcblk_da[sh2->is_slave][tmp] = (blkid << 1) | 1;
+ drcblk[tmp] = (blkid_main << 1) | 1;
for (++tmp; tmp < tmp2; tmp++) {
if (drcblk[tmp])
- break; // dont overwrite overlay block
- drcblk[tmp] = blkid << 1;
+ continue; // dont overwrite overlay block(s)
+ drcblk[tmp] = blkid_main << 1;
}
}
else if ((this_block->addr & 0xc7fc0000) == 0x06000000) { // DRAM
- tmp = (this_block->addr & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT;
+ tmp = (this_block->addr & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT;
tmp2 = (this_block->end_addr & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT;
- Pico32xMem->drcblk_ram[tmp] = (blkid << 1) | 1;
+ Pico32xMem->drcblk_ram[tmp] = (blkid_main << 1) | 1;
for (++tmp; tmp < tmp2; tmp++) {
if (Pico32xMem->drcblk_ram[tmp])
- break;
- Pico32xMem->drcblk_ram[tmp] = blkid << 1;
+ continue;
+ Pico32xMem->drcblk_ram[tmp] = blkid_main << 1;
}
}
- tmp = rcache_get_reg(SHR_SR, RC_GR_RMW);
- emith_sub_r_imm(tmp, cycles << 12);
- rcache_flush();
- emith_jump(sh2_drc_exit);
tcache_ptrs[tcache_id] = tcache_ptr;
#ifdef ARM
insns_compiled, host_insn_count, (double)host_insn_count / insns_compiled);
if ((sh2->pc & 0xc6000000) == 0x02000000) // ROM
dbg(1, " hash collisions %d/%d", hash_collisions, block_counts[tcache_id]);
+/*
+ printf("~~~\n");
+ tcache_dsm_ptrs[tcache_id] = block_entry;
+ do_host_disasm(tcache_id);
+ printf("~~~\n");
+*/
+
#if (DRC_DEBUG & 2)
fflush(stdout);
#endif
{
void *block = NULL;
block_desc *bd = NULL;
+ int tcache_id = 0;
// FIXME: must avoid doing it so often..
//sh2_test_irq(sh2);
// we have full block id tables for data_array and RAM
// BIOS goes to data_array table too
- if ((sh2->pc & 0xff000000) == 0xc0000000 || (sh2->pc & ~0xfff) == 0) {
+ if ((sh2->pc & 0xe0000000) == 0xc0000000 || (sh2->pc & ~0xfff) == 0) {
int blkid = Pico32xMem->drcblk_da[sh2->is_slave][(sh2->pc & 0xfff) >> SH2_DRCBLK_DA_SHIFT];
+ tcache_id = 1 + sh2->is_slave;
if (blkid & 1) {
- bd = &block_tables[1 + sh2->is_slave][blkid >> 1];
+ bd = &block_tables[tcache_id][blkid >> 1];
block = bd->tcache_ptr;
}
}
else if ((sh2->pc & 0xc6000000) == 0x06000000) {
int blkid = Pico32xMem->drcblk_ram[(sh2->pc & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT];
if (blkid & 1) {
- bd = &block_tables[0][blkid >> 1];
+ bd = &block_tables[tcache_id][blkid >> 1];
block = bd->tcache_ptr;
}
}
}
if (block == NULL)
- block = sh2_translate(sh2, bd);
+ block = sh2_translate(sh2, tcache_id);
+ if (block == NULL) {
+ // sh2_translate failed, possibly tcache overflow, clean up and try again
+ flush_tcache(tcache_id);
+ block = sh2_translate(sh2, tcache_id);
+ }
dbg(4, "= %csh2 enter %08x %p, c=%d", sh2->is_slave ? 's' : 'm',
sh2->pc, block, (signed int)sh2->sr >> 12);
bd->refcount++;
#endif
sh2_drc_entry(block, sh2);
+ dbg(4, "= leave %p", block);
}
}
u16 id = *p >> 1;
block_desc *bd = btab + id;
+ // FIXME: skip subblocks; do both directions
dbg(1, " killing block %08x", bd->addr);
bd->addr = bd->end_addr = 0;
cycles = sh2c->cycles_aim - sh2c->cycles_done;
// cycles are kept in SHR_SR unused bits (upper 20)
+ // bit19 contains T saved for delay slot
+ // others are usual SH2 flags
sh2c->sr &= 0x3f3;
sh2c->sr |= cycles << 12;
sh2_drc_dispatcher(sh2c);
notaz.gp2x.de / picodrive.git / commitdiff