X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=cpu%2Fdrc%2Femit_x86.c;h=247d1d6e808fcb8bd5bf2f4f9a05e52050d66a87;hb=18b9412743dafb4de7a889b4fba7e34f8a1e8b70;hp=6ef8ede6f4c6307c72f09b122b1fbfa9ac65640c;hpb=f0d7b1faa17e6e0e21c04db2e1b46ae33a808e11;p=picodrive.git diff --git a/cpu/drc/emit_x86.c b/cpu/drc/emit_x86.c index 6ef8ede..247d1d6 100644 --- a/cpu/drc/emit_x86.c +++ b/cpu/drc/emit_x86.c @@ -1,7 +1,9 @@ /* + * note: + * temp registers must be eax-edx due to use of SETcc. * note about silly things like emith_eor_r_r_r: - * these are here because the compiler was designed - * for ARM as it's primary target. + * these are here because the compiler was designed + * for ARM as it's primary target. */ #include @@ -9,37 +11,38 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #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 @@ -70,7 +73,11 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; 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 @@ -168,10 +175,10 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #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) \ @@ -192,16 +199,21 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #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) \ emith_arith_r_imm(4, r, ~(imm)) // fake conditionals (using SJMP instead) +#define emith_move_r_imm_c(cond, r, imm) { \ + (void)(cond); \ + emith_move_r_imm(r, imm); \ +} + #define emith_add_r_imm_c(cond, r, imm) { \ (void)(cond); \ emith_add_r_imm(r, imm); \ @@ -231,7 +243,7 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #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 @@ -293,21 +305,9 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #define emith_setc(r) { \ EMIT_OP(0x0f); \ - EMIT(0x92, u8); \ - EMIT_MODRM(3, 0, r); /* SETC r */ \ + EMIT_OP_MODRM(0x92, 3, 0, r); /* SETC r */ \ } -// put bit0 of r0 to carry -#define emith_set_carry(r0) { \ - emith_tst_r_imm(r0, 1); /* clears C */ \ - EMITH_SJMP_START(DCOND_EQ); \ - EMIT_OP(0xf9); /* STC */ \ - EMITH_SJMP_END(DCOND_EQ); \ -} - -// put bit0 of r0 to carry (for subtraction) -#define emith_set_carry_sub emith_set_carry - // XXX: stupid mess #define emith_mul_(op, dlo, dhi, s1, s2) { \ int rmr; \ @@ -365,6 +365,7 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #define emith_subf_r_r emith_sub_r_r #define emith_adcf_r_r emith_adc_r_r #define emith_sbcf_r_r emith_sbc_r_r +#define emith_eorf_r_r emith_eor_r_r #define emith_negcf_r_r emith_negc_r_r #define emith_lslf emith_lsl @@ -376,24 +377,51 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #define emith_rorcf emith_rorc // XXX: offs is 8bit only -#define emith_ctx_read(r, offs) { \ +#define emith_ctx_read(r, offs) do { \ EMIT_OP_MODRM(0x8b, 1, r, xBP); \ EMIT(offs, u8); /* mov tmp, [ebp+#offs] */ \ -} +} while (0) -#define emith_ctx_write(r, offs) { \ +#define emith_ctx_read_multiple(r, offs, cnt, tmpr) do { \ + int r_ = r, offs_ = offs, cnt_ = cnt; \ + for (; cnt_ > 0; r_++, offs_ += 4, cnt_--) \ + emith_ctx_read(r_, offs_); \ +} while (0) + +#define emith_ctx_write(r, offs) do { \ EMIT_OP_MODRM(0x89, 1, r, xBP); \ EMIT(offs, u8); /* mov [ebp+#offs], tmp */ \ -} +} while (0) + +#define emith_ctx_write_multiple(r, offs, cnt, tmpr) do { \ + int r_ = r, offs_ = offs, cnt_ = cnt; \ + for (; cnt_ > 0; r_++, offs_ += 4, cnt_--) \ + emith_ctx_write(r_, offs_); \ +} 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); \ } @@ -401,15 +429,21 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #define emith_call_cond(cond, ptr) \ emith_call(ptr) -// "simple" or "short" jump -#define EMITH_SJMP_START(cond) { \ +#define emith_jump_reg(r) \ + EMIT_OP_MODRM(0xff, 3, 4, r) + +#define EMITH_JMP_START(cond) { \ u8 *cond_ptr; \ JMP8_POS(cond_ptr) -#define EMITH_SJMP_END(cond) \ +#define EMITH_JMP_END(cond) \ JMP8_EMIT(cond, cond_ptr); \ } +// "simple" jump (no more then a few insns) +#define EMITH_SJMP_START EMITH_JMP_START +#define EMITH_SJMP_END EMITH_JMP_END + #define host_arg2reg(rd, arg) \ switch (arg) { \ case 0: rd = xAX; break; \ @@ -430,10 +464,19 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; } /* SH2 drc specific */ -#define emith_sh2_test_t() { \ - int t = rcache_get_reg(SHR_SR, RC_GR_READ); \ - EMIT_OP_MODRM(0xf6, 3, 0, t); \ - EMIT(0x01, u8); /* test , byte 1 */ \ +#define emith_sh2_drc_entry() { \ + emith_push(xBX); \ + emith_push(xBP); \ + emith_push(xSI); \ + emith_push(xDI); \ +} + +#define emith_sh2_drc_exit() { \ + emith_pop(xDI); \ + emith_pop(xSI); \ + emith_pop(xBP); \ + emith_pop(xBX); \ + EMIT_OP(0xc3); /* ret */\ } #define emith_sh2_dtbf_loop() { \ @@ -449,7 +492,7 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; 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 */ \ @@ -458,26 +501,23 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; 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_); \ } -#define emith_carry_to_t(srr, is_sub) { \ - int tmp_ = rcache_get_tmp(); \ - emith_setc(tmp_); \ - emith_bic_r_imm(srr, 1); \ - EMIT_OP_MODRM(0x08, 3, tmp_, srr); /* OR srrl, tmpl */ \ - rcache_free_tmp(tmp_); \ -} +#define emith_tpop_carry(sr, is_sub) \ + emith_lsr(sr, sr, 1) + +#define emith_tpush_carry(sr, is_sub) \ + emith_adc_r_r(sr, sr) /* * if Q @@ -489,15 +529,16 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI }; #define emith_sh2_div1_step(rn, rm, sr) { \ u8 *jmp0, *jmp1; \ int tmp_ = rcache_get_tmp(); \ + emith_eor_r_r(tmp_, tmp_); \ emith_tst_r_imm(sr, Q); /* if (Q ^ M) */ \ 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(0x30, 3, tmp_, sr); /* T = Q1 ^ Q2 (byte) */ \ + EMIT_OP_MODRM(0x31, 3, tmp_, sr); /* T = Q1 ^ Q2 */ \ rcache_free_tmp(tmp_); \ }