/*
+ * 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.
+ * 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.
#define EMIT_SIB(scale,index,base) \
EMIT(((scale)<<6) | ((index)<<3) | (base), u8)
-#define EMIT_OP_MODRM(op,mod,r,rm) { \
+#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; \
} \
} 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)
-#define emith_read8_r_r_offs(r, rs, offs) \
- emith_deref_op(0x8a, 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) \
- emith_deref_op(0x88, r, rs, offs)
+#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 */ \
#define emith_write16_r_r_offs(r, rs, offs) { \
EMIT(0x66, u8); \
- emith_write16_r_r_offs(r, rs, offs) \
+ emith_write_r_r_offs(r, rs, offs); \
}
#define emith_ctx_read(r, offs) \
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(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_SJMP3_MID EMITH_JMP3_MID
#define EMITH_SJMP3_END EMITH_JMP3_END
-#define host_arg2reg(rd, arg) \
- switch (arg) { \
- case 0: rd = xAX; break; \
- case 1: rd = xDX; break; \
- case 2: rd = xCX; break; \
- }
-
#define emith_pass_arg_r(arg, reg) { \
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); \