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Diffstat (limited to 'trunk/src/emu/cpu/powerpc/ppcfe.h')
-rw-r--r-- | trunk/src/emu/cpu/powerpc/ppcfe.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/powerpc/ppcfe.h b/trunk/src/emu/cpu/powerpc/ppcfe.h new file mode 100644 index 00000000000..b3209e4358c --- /dev/null +++ b/trunk/src/emu/cpu/powerpc/ppcfe.h @@ -0,0 +1,106 @@ +/*************************************************************************** + + ppcfe.h + + Front-end for PowerPC recompiler + +**************************************************************************** + + Copyright Aaron Giles + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + * Neither the name 'MAME' nor the names of its contributors may be + used to endorse or promote products derived from this software + without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR + IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, + INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. + +***************************************************************************/ + +#ifndef __PPCFE_H__ +#define __PPCFE_H__ + +#include "ppccom.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(powerpc_state &state, 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_context.flavor == PPC_MODEL_403GA || m_context.flavor == PPC_MODEL_403GB || m_context.flavor == PPC_MODEL_403GC || m_context.flavor == PPC_MODEL_403GCX || m_context.flavor == PPC_MODEL_405GP); } + bool is_601_class() const { return (m_context.flavor == PPC_MODEL_601); } + bool is_602_class() const { return (m_context.flavor == PPC_MODEL_602); } + bool is_603_class() const { return (m_context.flavor == PPC_MODEL_603 || m_context.flavor == PPC_MODEL_603E || m_context.flavor == PPC_MODEL_603EV || m_context.flavor == 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 + powerpc_state &m_context; +}; + + +#endif /* __PPCFE_H__ */ |