/*
+ * 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:
#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; \
}
// _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); \
#define is_abcdx(r) (xAX <= (r) && (r) <= xDX)
-#define emith_read_op_8_16(op, r, rs, offs) do { \
+#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(op, r_, rs, offs); \
+ emith_deref_op(0x8a, r_, rs, offs); \
if ((r) != r_) { \
emith_move_r_r(r, r_); \
rcache_free_tmp(r_); \
} \
} while (0)
-#define emith_write_op_8_16(op, r, rs, offs) do { \
+#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(op, r_, rs, offs); \
+ emith_deref_op(0x88, r_, rs, offs); \
if ((r) != r_) \
rcache_free_tmp(r_); \
} while (0)
-#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_read_op_8_16(0x8a, r, rs, offs)
-
-#define emith_write8_r_r_offs(r, rs, offs) \
- emith_write_op_8_16(0x88, r, rs, offs)
-
#define emith_read16_r_r_offs(r, rs, offs) { \
EMIT(0x66, u8); /* operand override */ \
- emith_read_op_8_16(0x8b, r, rs, offs); \
+ emith_read_r_r_offs(r, rs, offs); \
}
#define emith_write16_r_r_offs(r, rs, offs) { \
EMIT(0x66, u8); \
- emith_read_op_8_16(0x89, r, rs, offs); \
+ emith_write_r_r_offs(r, rs, offs); \
}
#define emith_ctx_read(r, offs) \
}
// assumes EBX is free temporary
-#define emith_sh2_wcall(a, tab, ret_ptr) { \
+#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_ctx_read(arg2_, offsetof(SH2, is_slave)); \
- emith_push_imm((long)(ret_ptr)); \
+ emith_move_r_r(arg2_, CONTEXT_REG); \
emith_jump_reg(xBX); \
}