mirror of
				https://github.com/RaySollium99/picodrive.git
				synced 2025-10-27 00:29:39 -04:00 
			
		
		
		
	 f81107f590
			
		
	
	
		f81107f590
		
	
	
	
	
		
			
			- use consistent read tables (with write) - use sh2 ptr instead of id - place data_array/peri_regs in sh2 struct
		
			
				
	
	
		
			704 lines
		
	
	
	
		
			17 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			704 lines
		
	
	
	
		
			17 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /*
 | |
|  * Basic macros to emit x86 instructions and some utils
 | |
|  * Copyright (C) 2008,2009,2010 notaz
 | |
|  *
 | |
|  * This work is licensed under the terms of MAME license.
 | |
|  * See COPYING file in the top-level directory.
 | |
|  *
 | |
|  * note:
 | |
|  *  temp registers must be eax-edx due to use of SETcc and r/w 8/16.
 | |
|  * 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.
 | |
|  */
 | |
| #include <stdarg.h>
 | |
| 
 | |
| enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI };
 | |
| 
 | |
| #define CONTEXT_REG xBP
 | |
| 
 | |
| #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 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
 | |
| 
 | |
| #define EMIT(val, type) { \
 | |
| 	EMIT_PTR(tcache_ptr, val, type); \
 | |
| 	tcache_ptr += sizeof(type); \
 | |
| }
 | |
| 
 | |
| #define EMIT_OP(op) { \
 | |
| 	COUNT_OP; \
 | |
| 	EMIT(op, u8); \
 | |
| }
 | |
| 
 | |
| #define EMIT_MODRM(mod,r,rm) \
 | |
| 	EMIT(((mod)<<6) | ((r)<<3) | (rm), u8)
 | |
| 
 | |
| #define EMIT_SIB(scale,index,base) \
 | |
| 	EMIT(((scale)<<6) | ((index)<<3) | (base), u8)
 | |
| 
 | |
| #define EMIT_OP_MODRM(op,mod,r,rm) do { \
 | |
| 	EMIT_OP(op); \
 | |
| 	EMIT_MODRM(mod, r, rm); \
 | |
| } while (0)
 | |
| 
 | |
| #define JMP8_POS(ptr) \
 | |
| 	ptr = tcache_ptr; \
 | |
| 	tcache_ptr += 2
 | |
| 
 | |
| #define JMP8_EMIT(op, ptr) \
 | |
| 	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_r(dst, src) \
 | |
| 	EMIT_OP_MODRM(0x8b, 3, dst, src)
 | |
| 
 | |
| #define emith_add_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x01, 3, s, d)
 | |
| 
 | |
| #define emith_sub_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x29, 3, s, d)
 | |
| 
 | |
| #define emith_adc_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x11, 3, s, d)
 | |
| 
 | |
| #define emith_sbc_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x19, 3, s, d) /* SBB */
 | |
| 
 | |
| #define emith_or_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x09, 3, s, d)
 | |
| 
 | |
| #define emith_and_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x21, 3, s, d)
 | |
| 
 | |
| #define emith_eor_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x31, 3, s, d) /* XOR */
 | |
| 
 | |
| #define emith_tst_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x85, 3, s, d) /* TEST */
 | |
| 
 | |
| #define emith_cmp_r_r(d, s) \
 | |
| 	EMIT_OP_MODRM(0x39, 3, s, d)
 | |
| 
 | |
| // fake teq - test equivalence - get_flags(d ^ s)
 | |
| #define emith_teq_r_r(d, s) { \
 | |
| 	emith_push(d); \
 | |
| 	emith_eor_r_r(d, s); \
 | |
| 	emith_pop(d); \
 | |
| }
 | |
| 
 | |
| #define emith_mvn_r_r(d, s) { \
 | |
| 	if (d != s) \
 | |
| 		emith_move_r_r(d, s); \
 | |
| 	EMIT_OP_MODRM(0xf7, 3, 2, d); /* NOT d */ \
 | |
| }
 | |
| 
 | |
| #define emith_negc_r_r(d, s) { \
 | |
| 	int tmp_ = rcache_get_tmp(); \
 | |
| 	emith_move_r_imm(tmp_, 0); \
 | |
| 	emith_sbc_r_r(tmp_, s); \
 | |
| 	emith_move_r_r(d, tmp_); \
 | |
| 	rcache_free_tmp(tmp_); \
 | |
| }
 | |
| 
 | |
| #define emith_neg_r_r(d, s) { \
 | |
| 	if (d != s) \
 | |
| 		emith_move_r_r(d, s); \
 | |
| 	EMIT_OP_MODRM(0xf7, 3, 3, d); /* NEG d */ \
 | |
| }
 | |
| 
 | |
| // _r_r_r
 | |
| #define emith_add_r_r_r(d, s1, s2) { \
 | |
| 	if (d == s1) { \
 | |
| 		emith_add_r_r(d, s2); \
 | |
| 	} else if (d == s2) { \
 | |
| 		emith_add_r_r(d, s1); \
 | |
| 	} else { \
 | |
| 		emith_move_r_r(d, s1); \
 | |
| 		emith_add_r_r(d, s2); \
 | |
| 	} \
 | |
| }
 | |
| 
 | |
| #define emith_eor_r_r_r(d, s1, s2) { \
 | |
| 	if (d == s1) { \
 | |
| 		emith_eor_r_r(d, s2); \
 | |
| 	} else if (d == s2) { \
 | |
| 		emith_eor_r_r(d, s1); \
 | |
| 	} else { \
 | |
| 		emith_move_r_r(d, s1); \
 | |
| 		emith_eor_r_r(d, s2); \
 | |
| 	} \
 | |
| }
 | |
| 
 | |
| // _r_r_shift
 | |
| #define emith_or_r_r_lsl(d, s, lslimm) { \
 | |
| 	int tmp_ = rcache_get_tmp(); \
 | |
| 	emith_lsl(tmp_, s, lslimm); \
 | |
| 	emith_or_r_r(d, tmp_); \
 | |
| 	rcache_free_tmp(tmp_); \
 | |
| }
 | |
| 
 | |
| // d != s
 | |
| #define emith_eor_r_r_lsr(d, s, lsrimm) { \
 | |
| 	emith_push(s); \
 | |
| 	emith_lsr(s, s, lsrimm); \
 | |
| 	emith_eor_r_r(d, s); \
 | |
| 	emith_pop(s); \
 | |
| }
 | |
| 
 | |
| // _r_imm
 | |
| #define emith_move_r_imm(r, imm) { \
 | |
| 	EMIT_OP(0xb8 + (r)); \
 | |
| 	EMIT(imm, u32); \
 | |
| }
 | |
| 
 | |
| #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) do { \
 | |
| 	EMIT_OP_MODRM(0x81, 3, op, r); \
 | |
| 	EMIT(imm, u32); \
 | |
| } while (0)
 | |
| 
 | |
| #define emith_add_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(0, r, imm)
 | |
| 
 | |
| #define emith_or_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(1, r, imm)
 | |
| 
 | |
| #define emith_adc_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(2, r, imm)
 | |
| 
 | |
| #define emith_sbc_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(3, r, imm) // sbb
 | |
| 
 | |
| #define emith_and_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(4, r, imm)
 | |
| 
 | |
| #define emith_sub_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(5, r, imm)
 | |
| 
 | |
| #define emith_eor_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(6, r, imm)
 | |
| 
 | |
| #define emith_cmp_r_imm(r, imm) \
 | |
| 	emith_arith_r_imm(7, 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); \
 | |
| }
 | |
| 
 | |
| #define emith_sub_r_imm_c(cond, r, imm) { \
 | |
| 	(void)(cond); \
 | |
| 	emith_sub_r_imm(r, imm); \
 | |
| }
 | |
| 
 | |
| #define emith_or_r_imm_c(cond, r, imm) \
 | |
| 	emith_or_r_imm(r, imm)
 | |
| #define emith_eor_r_imm_c(cond, r, imm) \
 | |
| 	emith_eor_r_imm(r, imm)
 | |
| #define emith_bic_r_imm_c(cond, r, imm) \
 | |
| 	emith_bic_r_imm(r, imm)
 | |
| #define emith_ror_c(cond, d, s, cnt) \
 | |
| 	emith_ror(d, s, cnt)
 | |
| 
 | |
| #define emith_read_r_r_offs_c(cond, r, rs, offs) \
 | |
| 	emith_read_r_r_offs(r, rs, offs)
 | |
| #define emith_write_r_r_offs_c(cond, r, rs, offs) \
 | |
| 	emith_write_r_r_offs(r, rs, offs)
 | |
| #define emith_read8_r_r_offs_c(cond, r, rs, offs) \
 | |
| 	emith_read8_r_r_offs(r, rs, offs)
 | |
| #define emith_write8_r_r_offs_c(cond, r, rs, offs) \
 | |
| 	emith_write8_r_r_offs(r, rs, offs)
 | |
| #define emith_read16_r_r_offs_c(cond, r, rs, offs) \
 | |
| 	emith_read16_r_r_offs(r, rs, offs)
 | |
| #define emith_write16_r_r_offs_c(cond, r, rs, offs) \
 | |
| 	emith_write16_r_r_offs(r, rs, offs)
 | |
| #define emith_jump_reg_c(cond, r) \
 | |
| 	emith_jump_reg(r)
 | |
| #define emith_jump_ctx_c(cond, offs) \
 | |
| 	emith_jump_ctx(offs)
 | |
| #define emith_ret_c(cond) \
 | |
| 	emith_ret()
 | |
| 
 | |
| // _r_r_imm
 | |
| #define emith_add_r_r_imm(d, s, imm) { \
 | |
| 	if (d != s) \
 | |
| 		emith_move_r_r(d, s); \
 | |
| 	emith_add_r_imm(d, 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); \
 | |
| }
 | |
| 
 | |
| // shift
 | |
| #define emith_shift(op, d, s, cnt) { \
 | |
| 	if (d != s) \
 | |
| 		emith_move_r_r(d, s); \
 | |
| 	EMIT_OP_MODRM(0xc1, 3, op, d); \
 | |
| 	EMIT(cnt, u8); \
 | |
| }
 | |
| 
 | |
| #define emith_lsl(d, s, cnt) \
 | |
| 	emith_shift(4, d, s, cnt)
 | |
| 
 | |
| #define emith_lsr(d, s, cnt) \
 | |
| 	emith_shift(5, d, s, cnt)
 | |
| 
 | |
| #define emith_asr(d, s, cnt) \
 | |
| 	emith_shift(7, d, s, cnt)
 | |
| 
 | |
| #define emith_rol(d, s, cnt) \
 | |
| 	emith_shift(0, d, s, cnt)
 | |
| 
 | |
| #define emith_ror(d, s, cnt) \
 | |
| 	emith_shift(1, d, s, cnt)
 | |
| 
 | |
| #define emith_rolc(r) \
 | |
| 	EMIT_OP_MODRM(0xd1, 3, 2, r)
 | |
| 
 | |
| #define emith_rorc(r) \
 | |
| 	EMIT_OP_MODRM(0xd1, 3, 3, r)
 | |
| 
 | |
| // misc
 | |
| #define emith_push(r) \
 | |
| 	EMIT_OP(0x50 + (r))
 | |
| 
 | |
| #define emith_push_imm(imm) { \
 | |
| 	EMIT_OP(0x68); \
 | |
| 	EMIT(imm, u32); \
 | |
| }
 | |
| 
 | |
| #define emith_pop(r) \
 | |
| 	EMIT_OP(0x58 + (r))
 | |
| 
 | |
| #define emith_neg_r(r) \
 | |
| 	EMIT_OP_MODRM(0xf7, 3, 3, r)
 | |
| 
 | |
| #define emith_clear_msb(d, s, count) { \
 | |
| 	u32 t = (u32)-1; \
 | |
| 	t >>= count; \
 | |
| 	if (d != s) \
 | |
| 		emith_move_r_r(d, s); \
 | |
| 	emith_and_r_imm(d, t); \
 | |
| }
 | |
| 
 | |
| #define emith_clear_msb_c(cond, d, s, count) { \
 | |
| 	(void)(cond); \
 | |
| 	emith_clear_msb(d, s, count); \
 | |
| }
 | |
| 
 | |
| #define emith_sext(d, s, bits) { \
 | |
| 	emith_lsl(d, s, 32 - (bits)); \
 | |
| 	emith_asr(d, d, 32 - (bits)); \
 | |
| }
 | |
| 
 | |
| #define emith_setc(r) { \
 | |
| 	EMIT_OP(0x0f); \
 | |
| 	EMIT_OP_MODRM(0x92, 3, 0, r); /* SETC r */ \
 | |
| }
 | |
| 
 | |
| // XXX: stupid mess
 | |
| #define emith_mul_(op, dlo, dhi, s1, s2) { \
 | |
| 	int rmr; \
 | |
| 	if (dlo != xAX && dhi != xAX) \
 | |
| 		emith_push(xAX); \
 | |
| 	if (dlo != xDX && dhi != xDX) \
 | |
| 		emith_push(xDX); \
 | |
| 	if ((s1) == xAX) \
 | |
| 		rmr = s2; \
 | |
| 	else if ((s2) == xAX) \
 | |
| 		rmr = s1; \
 | |
| 	else { \
 | |
| 		emith_move_r_r(xAX, s1); \
 | |
| 		rmr = s2; \
 | |
| 	} \
 | |
| 	EMIT_OP_MODRM(0xf7, 3, op, rmr); /* xMUL rmr */ \
 | |
| 	/* XXX: using push/pop for the case of edx->eax; eax->edx */ \
 | |
| 	if (dhi != xDX && dhi != -1) \
 | |
| 		emith_push(xDX); \
 | |
| 	if (dlo != xAX) \
 | |
| 		emith_move_r_r(dlo, xAX); \
 | |
| 	if (dhi != xDX && dhi != -1) \
 | |
| 		emith_pop(dhi); \
 | |
| 	if (dlo != xDX && dhi != xDX) \
 | |
| 		emith_pop(xDX); \
 | |
| 	if (dlo != xAX && dhi != xAX) \
 | |
| 		emith_pop(xAX); \
 | |
| }
 | |
| 
 | |
| #define emith_mul_u64(dlo, dhi, s1, s2) \
 | |
| 	emith_mul_(4, dlo, dhi, s1, s2) /* MUL */
 | |
| 
 | |
| #define emith_mul_s64(dlo, dhi, s1, s2) \
 | |
| 	emith_mul_(5, dlo, dhi, s1, s2) /* IMUL */
 | |
| 
 | |
| #define emith_mul(d, s1, s2) \
 | |
| 	emith_mul_(4, d, -1, s1, s2)
 | |
| 
 | |
| // (dlo,dhi) += signed(s1) * signed(s2)
 | |
| #define emith_mula_s64(dlo, dhi, s1, s2) { \
 | |
| 	emith_push(dhi); \
 | |
| 	emith_push(dlo); \
 | |
| 	emith_mul_(5, dlo, dhi, s1, s2); \
 | |
| 	EMIT_OP_MODRM(0x03, 0, dlo, 4); \
 | |
| 	EMIT_SIB(0, 4, 4); /* add dlo, [esp] */ \
 | |
| 	EMIT_OP_MODRM(0x13, 1, dhi, 4); \
 | |
| 	EMIT_SIB(0, 4, 4); \
 | |
| 	EMIT(4, u8); /* adc dhi, [esp+4] */ \
 | |
| 	emith_add_r_imm(xSP, 4*2); \
 | |
| }
 | |
| 
 | |
| // "flag" instructions are the same
 | |
| #define emith_subf_r_imm emith_sub_r_imm
 | |
| #define emith_addf_r_r   emith_add_r_r
 | |
| #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
 | |
| #define emith_lsrf  emith_lsr
 | |
| #define emith_asrf  emith_asr
 | |
| #define emith_rolf  emith_rol
 | |
| #define emith_rorf  emith_ror
 | |
| #define emith_rolcf emith_rolc
 | |
| #define emith_rorcf emith_rorc
 | |
| 
 | |
| #define emith_deref_op(op, r, rs, offs) do { \
 | |
| 	/* mov r <-> [ebp+#offs] */ \
 | |
| 	if ((offs) >= 0x80) { \
 | |
| 		EMIT_OP_MODRM(op, 2, r, rs); \
 | |
| 		EMIT(offs, u32); \
 | |
| 	} else { \
 | |
| 		EMIT_OP_MODRM(op, 1, r, rs); \
 | |
| 		EMIT(offs, u8); \
 | |
| 	} \
 | |
| } while (0)
 | |
| 
 | |
| #define is_abcdx(r) (xAX <= (r) && (r) <= xDX)
 | |
| 
 | |
| #define emith_read_r_r_offs(r, rs, offs) \
 | |
| 	emith_deref_op(0x8b, r, rs, offs)
 | |
| 
 | |
| #define emith_write_r_r_offs(r, rs, offs) \
 | |
| 	emith_deref_op(0x89, r, rs, offs)
 | |
| 
 | |
| // note: don't use prefixes on this
 | |
| #define emith_read8_r_r_offs(r, rs, offs) do { \
 | |
| 	int r_ = r; \
 | |
| 	if (!is_abcdx(r)) \
 | |
| 		r_ = rcache_get_tmp(); \
 | |
| 	emith_deref_op(0x8a, r_, rs, offs); \
 | |
| 	if ((r) != r_) { \
 | |
| 		emith_move_r_r(r, r_); \
 | |
| 		rcache_free_tmp(r_); \
 | |
| 	} \
 | |
| } while (0)
 | |
| 
 | |
| #define emith_write8_r_r_offs(r, rs, offs) do {\
 | |
| 	int r_ = r; \
 | |
| 	if (!is_abcdx(r)) { \
 | |
| 		r_ = rcache_get_tmp(); \
 | |
| 		emith_move_r_r(r_, r); \
 | |
| 	} \
 | |
| 	emith_deref_op(0x88, r_, rs, offs); \
 | |
| 	if ((r) != r_) \
 | |
| 		rcache_free_tmp(r_); \
 | |
| } while (0)
 | |
| 
 | |
| #define emith_read16_r_r_offs(r, rs, offs) { \
 | |
| 	EMIT(0x66, u8); /* operand override */ \
 | |
| 	emith_read_r_r_offs(r, rs, offs); \
 | |
| }
 | |
| 
 | |
| #define emith_write16_r_r_offs(r, rs, offs) { \
 | |
| 	EMIT(0x66, u8); \
 | |
| 	emith_write_r_r_offs(r, rs, offs); \
 | |
| }
 | |
| 
 | |
| #define emith_ctx_read(r, offs) \
 | |
| 	emith_read_r_r_offs(r, CONTEXT_REG, offs)
 | |
| 
 | |
| #define emith_ctx_write(r, offs) \
 | |
| 	emith_write_r_r_offs(r, CONTEXT_REG, 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_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)
 | |
| 
 | |
| // assumes EBX is free
 | |
| #define emith_ret_to_ctx(offs) { \
 | |
| 	emith_pop(xBX); \
 | |
| 	emith_ctx_write(xBX, offs); \
 | |
| }
 | |
| 
 | |
| #define emith_jump(ptr) { \
 | |
| 	u32 disp = (u32)(ptr) - ((u32)tcache_ptr + 5); \
 | |
| 	EMIT_OP(0xe9); \
 | |
| 	EMIT(disp, u32); \
 | |
| }
 | |
| 
 | |
| #define emith_jump_patchable(target) \
 | |
| 	emith_jump(target)
 | |
| 
 | |
| #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_cond_patchable(cond, target) \
 | |
| 	emith_jump_cond(cond, target)
 | |
| 
 | |
| #define emith_jump_patch(ptr, target) do { \
 | |
| 	u32 disp_ = (u32)(target) - ((u32)(ptr) + 4); \
 | |
| 	u32 offs_ = (*(u8 *)(ptr) == 0x0f) ? 2 : 1; \
 | |
| 	EMIT_PTR((u8 *)(ptr) + offs_, disp_ - offs_, u32); \
 | |
| } while (0)
 | |
| 
 | |
| #define emith_jump_at(ptr, target) { \
 | |
| 	u32 disp_ = (u32)(target) - ((u32)(ptr) + 5); \
 | |
| 	EMIT_PTR(ptr, 0xe9, u8); \
 | |
| 	EMIT_PTR((u8 *)(ptr) + 1, disp_, u32); \
 | |
| }
 | |
| 
 | |
| #define emith_call(ptr) { \
 | |
| 	u32 disp = (u32)(ptr) - ((u32)tcache_ptr + 5); \
 | |
| 	EMIT_OP(0xe8); \
 | |
| 	EMIT(disp, u32); \
 | |
| }
 | |
| 
 | |
| #define emith_call_cond(cond, ptr) \
 | |
| 	emith_call(ptr)
 | |
| 
 | |
| #define emith_call_reg(r) \
 | |
| 	EMIT_OP_MODRM(0xff, 3, 2, r)
 | |
| 
 | |
| #define emith_call_ctx(offs) { \
 | |
| 	EMIT_OP_MODRM(0xff, 2, 2, CONTEXT_REG); \
 | |
| 	EMIT(offs, u32); \
 | |
| }
 | |
| 
 | |
| #define emith_ret() \
 | |
| 	EMIT_OP(0xc3)
 | |
| 
 | |
| #define emith_jump_reg(r) \
 | |
| 	EMIT_OP_MODRM(0xff, 3, 4, r)
 | |
| 
 | |
| #define emith_jump_ctx(offs) { \
 | |
| 	EMIT_OP_MODRM(0xff, 2, 4, CONTEXT_REG); \
 | |
| 	EMIT(offs, u32); \
 | |
| }
 | |
| 
 | |
| #define emith_push_ret()
 | |
| 
 | |
| #define emith_pop_and_ret() \
 | |
| 	emith_ret()
 | |
| 
 | |
| #define EMITH_JMP_START(cond) { \
 | |
| 	u8 *cond_ptr; \
 | |
| 	JMP8_POS(cond_ptr)
 | |
| 
 | |
| #define EMITH_JMP_END(cond) \
 | |
| 	JMP8_EMIT(cond, cond_ptr); \
 | |
| }
 | |
| 
 | |
| #define EMITH_JMP3_START(cond) { \
 | |
| 	u8 *cond_ptr, *else_ptr; \
 | |
| 	JMP8_POS(cond_ptr)
 | |
| 
 | |
| #define EMITH_JMP3_MID(cond) \
 | |
| 	JMP8_POS(else_ptr); \
 | |
| 	JMP8_EMIT(cond, cond_ptr);
 | |
| 
 | |
| #define EMITH_JMP3_END() \
 | |
| 	JMP8_EMIT_NC(else_ptr); \
 | |
| }
 | |
| 
 | |
| // "simple" jump (no more then a few insns)
 | |
| // ARM will use conditional instructions here
 | |
| #define EMITH_SJMP_START EMITH_JMP_START
 | |
| #define EMITH_SJMP_END EMITH_JMP_END
 | |
| 
 | |
| #define EMITH_SJMP3_START EMITH_JMP3_START
 | |
| #define EMITH_SJMP3_MID EMITH_JMP3_MID
 | |
| #define EMITH_SJMP3_END EMITH_JMP3_END
 | |
| 
 | |
| #define emith_pass_arg_r(arg, reg) { \
 | |
| 	int rd = 7; \
 | |
| 	host_arg2reg(rd, arg); \
 | |
| 	emith_move_r_r(rd, reg); \
 | |
| }
 | |
| 
 | |
| #define emith_pass_arg_imm(arg, imm) { \
 | |
| 	int rd = 7; \
 | |
| 	host_arg2reg(rd, arg); \
 | |
| 	emith_move_r_imm(rd, imm); \
 | |
| }
 | |
| 
 | |
| #define host_instructions_updated(base, end)
 | |
| 
 | |
| #define host_arg2reg(rd, arg) \
 | |
| 	switch (arg) { \
 | |
| 	case 0: rd = xAX; break; \
 | |
| 	case 1: rd = xDX; break; \
 | |
| 	case 2: rd = xCX; break; \
 | |
| 	}
 | |
| 
 | |
| /* SH2 drc specific */
 | |
| #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);         \
 | |
| 	emith_ret();            \
 | |
| }
 | |
| 
 | |
| // assumes EBX is free temporary
 | |
| #define emith_sh2_wcall(a, tab) { \
 | |
| 	int arg2_; \
 | |
| 	host_arg2reg(arg2_, 2); \
 | |
| 	emith_lsr(xBX, a, SH2_WRITE_SHIFT); \
 | |
| 	EMIT_OP_MODRM(0x8b, 0, xBX, 4); \
 | |
| 	EMIT_SIB(2, xBX, tab); /* mov ebx, [tab + ebx * 4] */ \
 | |
| 	emith_move_r_r(arg2_, CONTEXT_REG); \
 | |
| 	emith_jump_reg(xBX); \
 | |
| }
 | |
| 
 | |
| #define emith_sh2_dtbf_loop() { \
 | |
| 	u8 *jmp0; /* negative cycles check */            \
 | |
| 	u8 *jmp1; /* unsinged overflow check */          \
 | |
| 	int cr, rn;                                      \
 | |
| 	int tmp_ = rcache_get_tmp();                     \
 | |
| 	cr = rcache_get_reg(SHR_SR, RC_GR_RMW);          \
 | |
| 	rn = rcache_get_reg((op >> 8) & 0x0f, RC_GR_RMW);\
 | |
| 	emith_sub_r_imm(rn, 1);                          \
 | |
| 	emith_sub_r_imm(cr, (cycles+1) << 12);           \
 | |
| 	cycles = 0;                                      \
 | |
| 	emith_asr(tmp_, cr, 2+12);                       \
 | |
| 	JMP8_POS(jmp0); /* no negative cycles */         \
 | |
| 	emith_move_r_imm(tmp_, 0);                       \
 | |
| 	JMP8_EMIT(ICOND_JNS, jmp0);                      \
 | |
| 	emith_and_r_imm(cr, 0xffe);                      \
 | |
| 	emith_subf_r_r(rn, tmp_);                        \
 | |
| 	JMP8_POS(jmp1); /* no overflow */                \
 | |
| 	emith_neg_r(rn); /* count left */                \
 | |
| 	emith_lsl(rn, rn, 2+12);                         \
 | |
| 	emith_or_r_r(cr, rn);                            \
 | |
| 	emith_or_r_imm(cr, 1);                           \
 | |
| 	emith_move_r_imm(rn, 0);                         \
 | |
| 	JMP8_EMIT(ICOND_JA, jmp1);                       \
 | |
| 	rcache_free_tmp(tmp_);                           \
 | |
| }
 | |
| 
 | |
| #define emith_write_sr(sr, srcr) { \
 | |
| 	int tmp_ = rcache_get_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_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
 | |
|  *   t = carry(Rn += Rm)
 | |
|  * else
 | |
|  *   t = carry(Rn -= Rm)
 | |
|  * T ^= t
 | |
|  */
 | |
| #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(ICOND_JE, jmp0); /* do_sub: */  \
 | |
| 	emith_sub_r_r(rn, rm);                    \
 | |
| 	JMP8_EMIT_NC(jmp1);      /* done: */      \
 | |
| 	emith_setc(tmp_);                         \
 | |
| 	EMIT_OP_MODRM(0x31, 3, tmp_, sr); /* T = Q1 ^ Q2 */ \
 | |
| 	rcache_free_tmp(tmp_);                    \
 | |
| }
 | |
| 
 |