blob: 5ba2f53dbb1b4fe467b002d5e947e1ffdf3fae83 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
ppcfe.h
Front-end for PowerPC recompiler
***************************************************************************/
#ifndef __PPCFE_H__
#define __PPCFE_H__
#include "ppc.h"
#include "cpu/drcfe.h"
//**************************************************************************
// MACROS
//**************************************************************************
// register flags 0
#define REGFLAG_R(n) (1 << (n))
#define REGFLAG_RZ(n) (((n) == 0) ? 0 : REGFLAG_R(n))
// register flags 1
#define REGFLAG_FR(n) (1 << (n))
// register flags 2
#define REGFLAG_CR(n) (0xf0000000 >> (4 * (n)))
#define REGFLAG_CR_BIT(n) (0x80000000 >> (n))
// register flags 3
#define REGFLAG_XER_CA (1 << 0)
#define REGFLAG_XER_OV (1 << 1)
#define REGFLAG_XER_SO (1 << 2)
#define REGFLAG_XER_COUNT (1 << 3)
#define REGFLAG_CTR (1 << 4)
#define REGFLAG_LR (1 << 5)
#define REGFLAG_FPSCR(n) (1 << (6 + (n)))
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class ppc_frontend : public drc_frontend
{
public:
// construction/destruction
ppc_frontend(ppc_device *ppc, UINT32 window_start, UINT32 window_end, UINT32 max_sequence);
protected:
// required overrides
virtual bool describe(opcode_desc &desc, const opcode_desc *prev);
private:
// inlines
UINT32 compute_spr(UINT32 spr) const { return ((spr >> 5) | (spr << 5)) & 0x3ff; }
bool is_403_class() const { return (m_ppc->m_flavor == ppc_device::PPC_MODEL_403GA || m_ppc->m_flavor == ppc_device::PPC_MODEL_403GB || m_ppc->m_flavor == ppc_device::PPC_MODEL_403GC || m_ppc->m_flavor == ppc_device::PPC_MODEL_403GCX || m_ppc->m_flavor == ppc_device::PPC_MODEL_405GP); }
bool is_601_class() const { return (m_ppc->m_flavor == ppc_device::PPC_MODEL_601); }
bool is_602_class() const { return (m_ppc->m_flavor == ppc_device::PPC_MODEL_602); }
bool is_603_class() const { return (m_ppc->m_flavor == ppc_device::PPC_MODEL_603 || m_ppc->m_flavor == ppc_device::PPC_MODEL_603E || m_ppc->m_flavor == ppc_device::PPC_MODEL_603EV || m_ppc->m_flavor == ppc_device::PPC_MODEL_603R); }
// internal helpers
bool describe_13(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
bool describe_1f(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
bool describe_3b(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
bool describe_3f(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
// internal state
ppc_device *m_ppc;
};
#endif /* __PPCFE_H__ */
|