X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=cpu%2Fsh2%2Fcompiler.c;h=5d68892a4630834c9798a32f13ed24796e4bfe67;hb=c18edb34e6708b399c6bfee8dac7b21a62988643;hp=13c606b4f2ef831d9b72b855c05df180b8272191;hpb=553c3eaa3a4bda6ba99d925ecab518fe82530cd6;p=picodrive.git diff --git a/cpu/sh2/compiler.c b/cpu/sh2/compiler.c index 13c606b..5d68892 100644 --- a/cpu/sh2/compiler.c +++ b/cpu/sh2/compiler.c @@ -58,28 +58,60 @@ static u8 *tcache_ptrs[3]; // ptr for code emiters static u8 *tcache_ptr; +// host register tracking +enum { + HR_FREE, + HR_CACHED, // 'val' has sh2_reg_e + HR_CACHED_DIRTY, + HR_CONST, // 'val' has constant + HR_TEMP, // reg used for temp storage +}; + +typedef struct { + u8 reg; + u8 type; + u16 stamp; // kind of a timestamp + u32 val; +} temp_reg_t; + #ifdef ARM #include "../drc/emit_arm.c" static const int reg_map_g2h[] = { - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, +}; + +static temp_reg_t reg_temp[] = { + { 0, }, + { 1, }, + { 12, }, + { 14, }, + { 2, }, + { 3, }, }; #else #include "../drc/emit_x86.c" static const int reg_map_g2h[] = { - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, - -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, + -1, -1, -1, -1, +}; + +// ax, cx, dx are usually temporaries +static temp_reg_t reg_temp[] = { + { xAX, }, + { xCX, }, + { xDX, }, }; #endif @@ -174,49 +206,143 @@ static block_desc *dr_add_block(u32 addr, int tcache_id, int *blk_id) // --------------------------------------------------------------- -static void emit_move_r_imm32(sh2_reg_e dst, u32 imm) +// register chache +static u16 rcache_counter; + +static temp_reg_t *rcache_evict(void) { - 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); + // evict reg with oldest stamp + int i, oldest = -1; + u16 min_stamp = (u16)-1; + + for (i = 0; i < ARRAY_SIZE(reg_temp); i++) { + if (reg_temp[i].type == HR_CACHED || reg_temp[i].type == HR_CACHED_DIRTY) + if (reg_temp[i].stamp <= min_stamp) { + min_stamp = reg_temp[i].stamp; + oldest = i; + } + } + + if (oldest == -1) { + printf("no registers to ec=vict, aborting\n"); + exit(1); + } + + i = oldest; + if (reg_temp[i].type == HR_CACHED_DIRTY) { + // writeback + emith_ctx_write(reg_temp[i].reg, reg_temp[i].val * 4); + } + + return ®_temp[i]; } -static void emit_move_r_r(sh2_reg_e dst, sh2_reg_e src) +typedef enum { + RC_GR_READ, + RC_GR_WRITE, + RC_GR_RMW, +} rc_gr_mode; + +static int rcache_get_reg(sh2_reg_e r, rc_gr_mode mode) { - int host_dst = reg_map_g2h[dst], host_src = reg_map_g2h[src]; - int tmp = 0; + temp_reg_t *tr; + int i; + + // maybe already statically mapped? + i = reg_map_g2h[r]; + if (i != -1) + return i; - if (host_dst != -1 && host_src != -1) { - emith_move_r_r(host_dst, host_src); - return; + rcache_counter++; + + // maybe already cached? + for (i = ARRAY_SIZE(reg_temp) - 1; i >= 0; i--) { + if ((reg_temp[i].type == HR_CACHED || reg_temp[i].type == HR_CACHED_DIRTY) && + reg_temp[i].val == r) + { + reg_temp[i].stamp = rcache_counter; + if (mode != RC_GR_READ) + reg_temp[i].type = HR_CACHED_DIRTY; + return reg_temp[i].reg; + } } - if (host_src != -1) - tmp = host_src; - if (host_dst != -1) - tmp = host_dst; + // use any free reg + for (i = ARRAY_SIZE(reg_temp) - 1; i >= 0; i--) { + if (reg_temp[i].type == HR_FREE || reg_temp[i].type == HR_CONST) { + tr = ®_temp[i]; + goto do_alloc; + } + } + + tr = rcache_evict(); + +do_alloc: + if (mode != RC_GR_WRITE) + emith_ctx_read(tr->reg, r * 4); - if (host_src == -1) - emith_ctx_read(tmp, src * 4); - if (host_dst == -1) - emith_ctx_write(tmp, dst * 4); + tr->type = mode != RC_GR_READ ? HR_CACHED_DIRTY : HR_CACHED; + tr->val = r; + tr->stamp = rcache_counter; + return tr->reg; } -static void emit_braf(sh2_reg_e reg, u32 pc) +static int rcache_get_tmp(void) { - 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_PPC * 4); + temp_reg_t *tr; + int i; + + for (i = 0; i < ARRAY_SIZE(reg_temp); i++) + if (reg_temp[i].type == HR_FREE || reg_temp[i].type == HR_CONST) { + tr = ®_temp[i]; + goto do_alloc; + } + + tr = rcache_evict(); + +do_alloc: + tr->type = HR_TEMP; + return tr->reg; +} + +static void rcache_free_tmp(int hr) +{ + int i; + for (i = 0; i < ARRAY_SIZE(reg_temp); i++) + if (reg_temp[i].reg == hr) + break; + + if (i == ARRAY_SIZE(reg_temp) || reg_temp[i].type != HR_TEMP) + printf("rcache_free_tmp fail: #%i hr %d, type %d\n", i, hr, reg_temp[i].type); +} + +static void rcache_flush(void) +{ + int i; + for (i = 0; i < ARRAY_SIZE(reg_temp); i++) { + if (reg_temp[i].type == HR_CACHED_DIRTY) { + // writeback + emith_ctx_write(reg_temp[i].reg, reg_temp[i].val * 4); + } + reg_temp[i].type = HR_FREE; + } + rcache_counter = 0; +} + +// --------------------------------------------------------------- + +static void emit_move_r_imm32(sh2_reg_e dst, u32 imm) +{ + int hr = rcache_get_reg(dst, RC_GR_WRITE); + emith_move_r_imm(hr, imm); +} + +static void emit_move_r_r(sh2_reg_e dst, sh2_reg_e src) +{ + int hr_d = rcache_get_reg(dst, RC_GR_WRITE); + int hr_s = rcache_get_reg(src, RC_GR_READ); + + emith_move_r_r(hr_d, hr_s); } /* @@ -320,7 +446,10 @@ static void *sh2_translate(SH2 *sh2, block_desc *other_block) DELAYED_OP; if (!(op & 0x20)) emit_move_r_imm32(SHR_PR, pc + 2); - emit_braf((op >> 8) & 0x0f, pc + 2); + tmp = rcache_get_reg(SHR_PPC, RC_GR_WRITE); + tmp2 = rcache_get_reg((op >> 8) & 0x0f, RC_GR_READ); + emith_move_r_r(tmp, tmp2); + emith_add_r_imm(tmp, pc + 2); cycles++; goto end_op; case 0x09: @@ -338,6 +467,7 @@ static void *sh2_translate(SH2 *sh2, block_desc *other_block) // RTE 0000000000101011 //emit_move_r_r(SHR_PC, SHR_PR); emit_move_r_imm32(SHR_PC, pc - 2); + rcache_flush(); emith_pass_arg_r(0, CONTEXT_REG); emith_pass_arg_imm(1, op); emith_call(sh2_do_op); @@ -351,6 +481,11 @@ static void *sh2_translate(SH2 *sh2, block_desc *other_block) case 0x04: switch (op & 0x0f) { + case 0x00: + if ((op & 0xf0) != 1) + goto default_; + // DT Rn 0100nnnn00010000 + goto default_; case 0x07: if ((op & 0xf0) != 0) goto default_; @@ -420,6 +555,7 @@ static void *sh2_translate(SH2 *sh2, block_desc *other_block) default: default_: emit_move_r_imm32(SHR_PC, pc - 2); + rcache_flush(); emith_pass_arg_r(0, CONTEXT_REG); emith_pass_arg_imm(1, op); emith_call(sh2_do_op); @@ -431,6 +567,7 @@ end_op: emit_move_r_r(SHR_PC, SHR_PPC); if (test_irq && delayed_op != 2) { + rcache_flush(); emith_pass_arg_r(0, CONTEXT_REG); emith_call(sh2_test_irq); break; @@ -468,10 +605,9 @@ end_block: } } - 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); + 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;