486 lines
9.4 KiB
C
486 lines
9.4 KiB
C
/* inline functions for Z8KSIM
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Copyright (C) 1992, 1993 Free Software Foundation, Inc.
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This file is part of Z8KSIM
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Z8KZIM; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef INLINE
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#define INLINE
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#endif
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#define UGT 0x0b
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#define ULE 0x03
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#define ULT 0x07
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#define UGE 0x0f
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#define SLOW 0
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#define T 0x8
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#define F 0x0
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#define LT 0x1
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#define GT 0xa
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#define LE 0x2
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#define EQ 0x6
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#define NE 0xe
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#define GE 0x9
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static int is_cond_true PARAMS((sim_state_type *context, int c));
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static void makeflags PARAMS((sim_state_type *context, int mask));
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static INLINE
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long
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sitoptr (si)
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long si;
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{
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return ((si & 0xff000000) >> 8) | (si & 0xffff);
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}
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static INLINE long
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ptrtosi (ptr)
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long ptr;
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{
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return ((ptr & 0xff0000) << 8) | (ptr & 0xffff);
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}
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static INLINE
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void
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put_long_reg (context, reg, val)
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sim_state_type *context;
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int reg;
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int val;
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{
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context->regs[reg].word = val >> 16;
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context->regs[reg + 1].word = val;
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}
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static INLINE
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void
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put_quad_reg (context, reg, val1, val2)
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sim_state_type *context;
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int reg;
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int val1;
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int val2;
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{
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context->regs[reg].word = val2 >> 16;
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context->regs[reg + 1].word = val2;
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context->regs[reg + 2].word = val1 >> 16;
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context->regs[reg + 3].word = val1;
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}
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static INLINE
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void
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put_word_reg (context, reg, val)
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sim_state_type *context;
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int reg;
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int val;
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{
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context->regs[reg].word = val;
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}
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static INLINE
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SItype get_long_reg (context, reg)
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sim_state_type *context;
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int reg;
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{
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USItype lsw = context->regs[reg + 1].word;
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USItype msw = context->regs[reg].word;
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return (msw << 16) | lsw;
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}
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#ifdef __GNUC__
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static INLINE
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struct UDIstruct
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get_quad_reg (context, reg)
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sim_state_type *context;
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int reg;
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{
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UDItype res;
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USItype lsw = get_long_reg (context, reg + 2);
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USItype msw = get_long_reg (context, reg);
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res.low = lsw;
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res.high = msw;
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return res;
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}
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#endif
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static INLINE void
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put_byte_mem_da (context, addr, value)
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sim_state_type *context;
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int addr;
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int value;
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{
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((unsigned char *) (context->memory))[addr] = value;
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}
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static INLINE
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void
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put_byte_reg (context, reg, val)
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sim_state_type *context;
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int reg;
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int val;
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{
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int old = context->regs[reg & 0x7].word;
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if (reg & 0x8)
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{
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old = old & 0xff00 | (val & 0xff);
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}
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else
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{
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old = old & 0x00ff | (val << 8);
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}
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context->regs[reg & 0x7].word = old;
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}
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static INLINE
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int
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get_byte_reg (context, reg)
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sim_state_type *context;
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int reg;
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{
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if (reg & 0x8)
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return context->regs[reg & 0x7].word & 0xff;
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else
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return (context->regs[reg & 0x7].word >> 8) & 0xff;
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}
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static INLINE
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void
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put_word_mem_da (context, addr, value)
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sim_state_type *context;
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int addr;
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int value;
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{
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if (addr & 1)
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{
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context->exception = SIM_BAD_ALIGN;
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addr &= ~1;
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}
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put_byte_mem_da(context, addr, value>>8);
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put_byte_mem_da(context, addr+1, value);
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}
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static INLINE unsigned char
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get_byte_mem_da (context, addr)
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sim_state_type *context;
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int addr;
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{
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return ((unsigned char *) (context->memory))[addr];
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}
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#if 0
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#define get_word_mem_da(context,addr)\
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*((unsigned short*)((char*)((context)->memory)+(addr)))
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#else
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#define get_word_mem_da(context,addr) (get_byte_mem_da(context, addr) << 8) | (get_byte_mem_da(context,addr+1))
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#endif
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#define get_word_reg(context,reg) (context)->regs[reg].word
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static INLINE
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SItype
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get_long_mem_da (context, addr)
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sim_state_type *context;
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int addr;
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{
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USItype lsw = get_word_mem_da(context,addr+2);
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USItype msw = get_word_mem_da(context, addr);
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return (msw << 16) + lsw;
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}
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static INLINE
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void
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put_long_mem_da (context, addr, value)
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sim_state_type *context;
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int addr;
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int value;
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{
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put_word_mem_da(context,addr, value>>16);
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put_word_mem_da(context,addr+2, value);
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}
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static INLINE
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int
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get_word_mem_ir (context, reg)
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sim_state_type *context;
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int reg;
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{
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return get_word_mem_da (context, get_word_reg (context, reg));
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}
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static INLINE
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void
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put_word_mem_ir (context, reg, value)
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sim_state_type *context;
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int reg;
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int value;
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{
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put_word_mem_da (context, get_word_reg (context, reg), value);
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}
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static INLINE
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int
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get_byte_mem_ir (context, reg)
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sim_state_type *context;
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int reg;
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{
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return get_byte_mem_da (context, get_word_reg (context, reg));
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}
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static INLINE
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void
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put_byte_mem_ir (context, reg, value)
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sim_state_type *context;
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int reg;
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int value;
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{
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put_byte_mem_da (context, get_word_reg (context, reg), value);
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}
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static INLINE
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int
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get_long_mem_ir (context, reg)
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sim_state_type *context;
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int reg;
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{
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return get_long_mem_da (context, get_word_reg (context, reg));
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}
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static INLINE
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void
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put_long_mem_ir (context, reg, value)
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sim_state_type *context;
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int reg;
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int value;
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{
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put_long_mem_da (context, get_word_reg (context, reg), value);
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}
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static INLINE
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void
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put_long_mem_x (context, base, reg, value)
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sim_state_type *context;
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int base;
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int reg;
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int value;
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{
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put_long_mem_da (context, get_word_reg (context, reg) + base, value);
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}
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static INLINE
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void
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put_word_mem_x (context, base, reg, value)
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sim_state_type *context;
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int base;
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int reg;
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int value;
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{
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put_word_mem_da (context, get_word_reg (context, reg) + base, value);
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}
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static INLINE
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void
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put_byte_mem_x (context, base, reg, value)
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sim_state_type *context;
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int base;
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int reg;
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int value;
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{
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put_byte_mem_da (context, get_word_reg (context, reg) + base, value);
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}
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static INLINE
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int
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get_word_mem_x (context, base, reg)
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sim_state_type *context;
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int base;
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int reg;
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{
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return get_word_mem_da (context, base + get_word_reg (context, reg));
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}
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static INLINE
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int
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get_byte_mem_x (context, base, reg)
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sim_state_type *context;
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int base;
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int reg;
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{
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return get_byte_mem_da (context, base + get_word_reg (context, reg));
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}
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static INLINE
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int
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get_long_mem_x (context, base, reg)
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sim_state_type *context;
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int base;
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int reg;
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{
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return get_long_mem_da (context, base + get_word_reg (context, reg));
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}
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static
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void
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makeflags (context, mask)
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sim_state_type *context;
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int mask;
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{
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PSW_ZERO = (context->dst & mask) == 0;
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PSW_SIGN = (context->dst >> (context->size - 1));
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if (context->broken_flags == TST_FLAGS)
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{
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extern char the_parity[];
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if (context->size == 8)
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{
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PSW_OVERFLOW = the_parity[context->dst & 0xff];
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}
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}
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else
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{
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/* Overflow is set if both operands have the same sign and the
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result is of different sign.
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V = A==B && R!=B jumping logic
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(~(A^B))&(R^B)
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V = (A^B)^(R^B) boolean
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*/
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PSW_OVERFLOW =
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((
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(~(context->srca ^ context->srcb)
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& (context->srca ^ context->dst))
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) >> (context->size - 1)
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);
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if (context->size < 32)
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{
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PSW_CARRY = ((context->dst >> context->size)) & 1;
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}
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else
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{
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/* carry is set when the result is smaller than a source */
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PSW_CARRY = (unsigned) context->dst > (unsigned) context->srca ;
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}
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}
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context->broken_flags = 0;
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}
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/* There are two ways to calculate the flags. We can
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either always calculate them and so the cc will always
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be correct, or we can only keep the arguments around and
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calc the flags when they're actually going to be used. */
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/* Right now we always calc the flags - I think it may be faster*/
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#define NORMAL_FLAGS(c,s,d,sa,sb,sub) \
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if (s == 8) \
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normal_flags_8(c,d,sa,sb,sub); \
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else if (s == 16) \
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normal_flags_16(c,d,sa,sb,sub); \
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else if (s == 32) \
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normal_flags_32(c,d,sa,sb,sub);
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static INLINE
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void
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normal_flags (context, size, dst, srca, srcb)
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sim_state_type *context;
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int size;
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int dst;
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int srca;
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int srcb;
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{
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context->srca = srca;
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context->srcb = srcb;
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context->dst = dst;
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context->size = size;
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context->broken_flags = CMP_FLAGS;
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}
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static INLINE
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void
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TEST_NORMAL_FLAGS (context, size, dst)
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sim_state_type *context;
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int size;
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int dst;
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{
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context->dst = dst;
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context->size = size;
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context->broken_flags = TST_FLAGS;
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}
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static INLINE
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void
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put_ptr_long_reg (context, reg, val)
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sim_state_type *context;
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int reg;
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int val;
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{
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context->regs[reg].word = (val >> 8) & 0x7f00;
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context->regs[reg + 1].word = val;
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}
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static INLINE
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long
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get_ptr_long_reg (context, reg)
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sim_state_type *context;
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int reg;
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{
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int val;
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val = (context->regs[reg].word << 8) | context->regs[reg + 1].word;
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return val;
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}
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static INLINE
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long
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get_ptr_long_mem_ir (context, reg)
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sim_state_type *context;
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int reg;
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{
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return sitoptr (get_long_mem_da (context, get_ptr_long_reg (context, reg)));
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}
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static INLINE
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long
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get_ptr_long_mem_da (context, addr)
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sim_state_type *context;
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long addr;
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{
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return sitoptr (get_long_mem_da (context, addr));
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}
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static INLINE
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void
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put_ptr_long_mem_da (context, addr, ptr)
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sim_state_type *context;
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long addr;
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long ptr;
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{
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put_long_mem_da (context, addr, ptrtosi (ptr));
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}
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