#ifndef ARM
#define DUMP_BLOCK 0x0c9a
unsigned int tcache[512*1024];
-void regfile_load(void){}
-void regfile_store(void){}
+void ssp_drc_next(void){}
+void ssp_drc_next_patch(void){}
+void ssp_drc_end(void){}
#endif
#include "gen_arm.c"
hostreg_r[r] = -1;
}
-/* trashes r0 */
+/* trashes r1 */
static void tr_flush_dirty_pmcrs(void)
{
u32 i, val = (u32)-1;
tr_flush_dirty_ST();
//tr_flush_dirty_pmcrs();
tr_mov16(0, reg);
- emit_call(ssp_pm_read);
+ emit_call(A_COND_AL, ssp_pm_read);
hostreg_clear();
}
static void tr_r0_to_PC(int const_val)
{
+/*
+ * do nothing - dispatcher will take care of this
EOP_MOV_REG_LSL(1, 0, 16); // mov r1, r0, lsl #16
EOP_STR_IMM(1,7,0x400+6*4); // str r1, [r7, #(0x400+6*8)]
hostreg_r[1] = -1;
+*/
}
static void tr_r0_to_AL(int const_val)
tr_flush_dirty_ST();
//tr_flush_dirty_pmcrs();
tr_mov16(1, reg);
- emit_call(ssp_pm_write);
+ emit_call(A_COND_AL, ssp_pm_write);
hostreg_clear();
}
// -----------------------------------------------------
-static int translate_op(unsigned int op, int *pc, int imm)
+static int translate_op(unsigned int op, int *pc, int imm, int *end_cond, int *jump_pc)
{
u32 tmpv, tmpv2, tmpv3;
int ret = 0;
}
tr_read_funcs[tmpv](op);
tr_write_funcs[tmpv2]((known_regb & (1 << tmpv)) ? known_regs.gr[tmpv].h : -1);
- if (tmpv2 == SSP_PC) ret |= 0x10000;
+ if (tmpv2 == SSP_PC) {
+ ret |= 0x10000;
+ *end_cond = -A_COND_AL;
+ }
ret++; break;
// ld d, (ri)
tr_rX_read(r, mod);
else tr_ptrr_mod(r, mod, 1, 1);
tr_write_funcs[tmpv](-1);
- if (tmpv == SSP_PC) ret |= 0x10000;
+ if (tmpv == SSP_PC) {
+ ret |= 0x10000;
+ *end_cond = -A_COND_AL;
+ }
ret++; break;
}
if (ret > 0) break;
tr_mov16(0, imm);
tr_write_funcs[tmpv](imm);
- if (tmpv == SSP_PC) ret |= 0x10000;
+ if (tmpv == SSP_PC) {
+ ret |= 0x10000;
+ *jump_pc = imm;
+ }
ret += 2; break;
// ld d, ((ri))
tmpv2 = (op >> 4) & 0xf; // dst
tr_rX_read2(op);
tr_write_funcs[tmpv2](-1);
- if (tmpv2 == SSP_PC) ret |= 0x10000;
+ if (tmpv2 == SSP_PC) {
+ ret |= 0x10000;
+ *end_cond = -A_COND_AL;
+ }
ret += 3; break;
// ldi (ri), imm
tcache_ptr = real_ptr;
}
tr_mov16_cond(tmpv, 0, imm);
- if (tmpv != A_COND_AL) {
+ if (tmpv != A_COND_AL)
tr_mov16_cond(tr_neg_cond(tmpv), 0, *pc);
- }
tr_r0_to_PC(tmpv == A_COND_AL ? imm : -1);
ret |= 0x10000;
+ *end_cond = tmpv;
+ *jump_pc = imm;
ret += 2; break;
}
EOP_LDRH_SIMPLE(0,0); // ldrh r0, [r0]
hostreg_r[0] = hostreg_r[1] = -1;
tr_write_funcs[tmpv2](-1);
- if (tmpv2 == SSP_PC) ret |= 0x10000;
+ if (tmpv2 == SSP_PC) {
+ ret |= 0x10000;
+ *end_cond = -A_COND_AL;
+ }
ret += 3; break;
// bra cond, addr
case 0x26:
tmpv = tr_cond_check(op);
tr_mov16_cond(tmpv, 0, imm);
- if (tmpv != A_COND_AL) {
+ if (tmpv != A_COND_AL)
tr_mov16_cond(tr_neg_cond(tmpv), 0, *pc);
- }
tr_r0_to_PC(tmpv == A_COND_AL ? imm : -1);
ret |= 0x10000;
+ *end_cond = tmpv;
+ *jump_pc = imm;
ret += 2; break;
// mod cond, op
return ret;
}
+static void emit_block_prologue(void)
+{
+ // check if there are enough cycles..
+ // note: r0 must contain PC of current block
+ EOP_CMP_IMM(11,0,0); // cmp r11, #0
+ emit_call(A_COND_LE, ssp_drc_end);
+}
+
+/* cond:
+ * >0: direct (un)conditional jump
+ * <0: indirect jump
+ */
+static void emit_block_epilogue(int cycles, int cond, int pc, int end_pc)
+{
+ if (cycles > 0xff) { printf("large cycle count: %i\n", cycles); cycles = 0xff; }
+ EOP_SUB_IMM(11,11,0,cycles); // sub r11, r11, #cycles
+
+ if (cond < 0 || (end_pc >= 0x400 && pc < 0x400)) {
+ // indirect jump, or rom -> iram jump, must use dispatcher
+ emit_jump(A_COND_AL, ssp_drc_next);
+ }
+ else if (cond == A_COND_AL) {
+ u32 *target = (pc < 0x400) ? block_table_iram[ssp->drc.iram_context][pc] : block_table[pc];
+ if (target != NULL)
+ emit_jump(A_COND_AL, target);
+ else {
+ emit_jump(A_COND_AL, ssp_drc_next);
+ // cause the next block to be emitted over jump instrction
+ tcache_ptr--;
+ }
+ }
+ else {
+ u32 *target1 = (pc < 0x400) ? block_table_iram[ssp->drc.iram_context][pc] : block_table[pc];
+ u32 *target2 = (end_pc < 0x400) ? block_table_iram[ssp->drc.iram_context][end_pc] : block_table[end_pc];
+ if (target1 != NULL)
+ emit_jump(cond, target1);
+ else emit_call(cond, ssp_drc_next_patch);
+ if (target2 != NULL)
+ emit_jump(tr_neg_cond(cond), target2); // neg_cond, to be able to swap jumps if needed
+ else emit_call(tr_neg_cond(cond), ssp_drc_next_patch);
+ }
+}
+
void *ssp_translate_block(int pc)
{
unsigned int op, op1, imm, ccount = 0;
unsigned int *block_start;
- int ret, ret_prev = -1, tpc;
+ int ret, end_cond = A_COND_AL, jump_pc = -1;
printf("translate %04x -> %04x\n", pc<<1, (tcache_ptr-tcache)<<2);
block_start = tcache_ptr;
if ((op1 & 0xf) == 4 || (op1 & 0xf) == 6)
imm = PROGRAM(pc++); // immediate
- tpc = pc;
- ret = translate_op(op, &pc, imm);
+ ret = translate_op(op, &pc, imm, &end_cond, &jump_pc);
if (ret <= 0)
{
printf("NULL func! op=%08x (%02x)\n", op, op1);
exit(1);
}
- else
- {
- ccount += ret & 0xffff;
- if (ret & 0x10000) break;
- }
- ret_prev = ret;
+ ccount += ret & 0xffff;
+ if (ret & 0x10000) break;
}
- if (ccount >= 100)
- emit_pc_dump(pc);
+ if (ccount >= 100) {
+ end_cond = A_COND_AL;
+ jump_pc = pc;
+ emit_mov_const(A_COND_AL, 0, pc);
+ }
tr_flush_dirty_prs();
tr_flush_dirty_ST();
tr_flush_dirty_pmcrs();
- emit_block_epilogue(ccount + 1);
- *tcache_ptr++ = 0xffffffff; // end of block
+ emit_block_epilogue(ccount, end_cond, jump_pc, pc);
if (tcache_ptr - tcache > TCACHE_SIZE/4) {
printf("tcache overflow!\n");
memset(block_table, 0, sizeof(block_table));
memset(block_table_iram, 0, sizeof(block_table_iram));
tcache_ptr = tcache;
- *tcache_ptr++ = 0xffffffff;
PicoLoadStateHook = ssp1601_state_load;
void ssp1601_dyn_reset(ssp1601_t *ssp)
{
+ // debug
+ {
+ int i, u;
+ FILE *f = fopen("tcache.bin", "wb");
+ fwrite(tcache, 1, (tcache_ptr - tcache)*4, f);
+ fclose(f);
+
+ for (i = 0; i < 0x5090/2; i++)
+ if (block_table[i])
+ printf("%06x -> __:%04x\n", (block_table[i] - tcache)*4, i<<1);
+ for (u = 1; u < 15; u++)
+ for (i = 0; i < 0x800/2; i++)
+ if (block_table_iram[u][i])
+ printf("%06x -> %02i:%04x\n", (block_table_iram[u][i] - tcache)*4, u, i<<1);
+ }
+
ssp1601_reset(ssp);
ssp->drc.iram_dirty = 1;
ssp->drc.iram_context = 0;
ssp->drc.ptr_dram = (u32) svp->dram;
ssp->drc.ptr_btable = (u32) block_table;
ssp->drc.ptr_btable_iram = (u32) block_table_iram;
+
+ // prevent new versions of IRAM from appearing
+ memset(svp->iram_rom, 0, 0x800);
}
void ssp1601_dyn_run(int cycles)
notaz.gp2x.de / picodrive.git / blobdiff