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-rw-r--r--sim/z8k/inlines.h486
1 files changed, 486 insertions, 0 deletions
diff --git a/sim/z8k/inlines.h b/sim/z8k/inlines.h
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+/* inline functions for Z8KSIM
+ Copyright (C) 1992, 1993 Free Software Foundation, Inc.
+
+This file is part of Z8KSIM
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Z8KZIM; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#ifndef INLINE
+#define INLINE
+#endif
+#define UGT 0x0b
+#define ULE 0x03
+#define ULT 0x07
+#define UGE 0x0f
+#define SLOW 0
+#define T 0x8
+#define F 0x0
+#define LT 0x1
+#define GT 0xa
+#define LE 0x2
+#define EQ 0x6
+#define NE 0xe
+#define GE 0x9
+
+ static int is_cond_true PARAMS((sim_state_type *context, int c));
+ static void makeflags PARAMS((sim_state_type *context, int mask));
+
+static INLINE
+long
+sitoptr (si)
+long si;
+{
+ return ((si & 0xff000000) >> 8) | (si & 0xffff);
+}
+static INLINE long
+ptrtosi (ptr)
+long ptr;
+{
+ return ((ptr & 0xff0000) << 8) | (ptr & 0xffff);
+}
+
+static INLINE
+void
+put_long_reg (context, reg, val)
+ sim_state_type *context;
+ int reg;
+ int val;
+{
+ context->regs[reg].word = val >> 16;
+ context->regs[reg + 1].word = val;
+}
+
+static INLINE
+void
+put_quad_reg (context, reg, val1, val2)
+ sim_state_type *context;
+ int reg;
+ int val1;
+ int val2;
+{
+ context->regs[reg].word = val2 >> 16;
+ context->regs[reg + 1].word = val2;
+ context->regs[reg + 2].word = val1 >> 16;
+ context->regs[reg + 3].word = val1;
+}
+
+static INLINE
+void
+put_word_reg (context, reg, val)
+ sim_state_type *context;
+ int reg;
+ int val;
+{
+ context->regs[reg].word = val;
+}
+
+static INLINE
+SItype get_long_reg (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ USItype lsw = context->regs[reg + 1].word;
+ USItype msw = context->regs[reg].word;
+
+ return (msw << 16) | lsw;
+}
+
+#ifdef __GNUC__
+static INLINE
+struct UDIstruct
+get_quad_reg (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ UDItype res;
+ USItype lsw = get_long_reg (context, reg + 2);
+ USItype msw = get_long_reg (context, reg);
+
+ res.low = lsw;
+ res.high = msw;
+ return res;
+}
+
+#endif
+
+static INLINE void
+put_byte_mem_da (context, addr, value)
+ sim_state_type *context;
+ int addr;
+ int value;
+{
+ ((unsigned char *) (context->memory))[addr] = value;
+}
+
+static INLINE
+void
+put_byte_reg (context, reg, val)
+ sim_state_type *context;
+ int reg;
+ int val;
+{
+ int old = context->regs[reg & 0x7].word;
+ if (reg & 0x8)
+ {
+ old = old & 0xff00 | (val & 0xff);
+ }
+ else
+ {
+ old = old & 0x00ff | (val << 8);
+ }
+ context->regs[reg & 0x7].word = old;
+}
+
+static INLINE
+int
+get_byte_reg (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ if (reg & 0x8)
+ return context->regs[reg & 0x7].word & 0xff;
+ else
+ return (context->regs[reg & 0x7].word >> 8) & 0xff;
+}
+
+static INLINE
+void
+put_word_mem_da (context, addr, value)
+ sim_state_type *context;
+ int addr;
+ int value;
+{
+ if (addr & 1)
+ {
+ context->exception = SIM_BAD_ALIGN;
+ addr &= ~1;
+ }
+ put_byte_mem_da(context, addr, value>>8);
+ put_byte_mem_da(context, addr+1, value);
+}
+
+static INLINE unsigned char
+get_byte_mem_da (context, addr)
+ sim_state_type *context;
+ int addr;
+{
+ return ((unsigned char *) (context->memory))[addr];
+}
+
+
+#if 0
+#define get_word_mem_da(context,addr)\
+ *((unsigned short*)((char*)((context)->memory)+(addr)))
+
+#else
+#define get_word_mem_da(context,addr) (get_byte_mem_da(context, addr) << 8) | (get_byte_mem_da(context,addr+1))
+#endif
+
+#define get_word_reg(context,reg) (context)->regs[reg].word
+
+static INLINE
+SItype
+get_long_mem_da (context, addr)
+ sim_state_type *context;
+ int addr;
+{
+ USItype lsw = get_word_mem_da(context,addr+2);
+ USItype msw = get_word_mem_da(context, addr);
+
+ return (msw << 16) + lsw;
+}
+
+static INLINE
+void
+put_long_mem_da (context, addr, value)
+ sim_state_type *context;
+ int addr;
+ int value;
+{
+ put_word_mem_da(context,addr, value>>16);
+ put_word_mem_da(context,addr+2, value);
+}
+
+static INLINE
+int
+get_word_mem_ir (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ return get_word_mem_da (context, get_word_reg (context, reg));
+}
+
+static INLINE
+void
+put_word_mem_ir (context, reg, value)
+ sim_state_type *context;
+ int reg;
+ int value;
+{
+
+ put_word_mem_da (context, get_word_reg (context, reg), value);
+}
+
+static INLINE
+int
+get_byte_mem_ir (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ return get_byte_mem_da (context, get_word_reg (context, reg));
+}
+
+static INLINE
+void
+put_byte_mem_ir (context, reg, value)
+ sim_state_type *context;
+ int reg;
+ int value;
+{
+ put_byte_mem_da (context, get_word_reg (context, reg), value);
+}
+
+static INLINE
+int
+get_long_mem_ir (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ return get_long_mem_da (context, get_word_reg (context, reg));
+}
+
+static INLINE
+void
+put_long_mem_ir (context, reg, value)
+ sim_state_type *context;
+ int reg;
+ int value;
+{
+
+ put_long_mem_da (context, get_word_reg (context, reg), value);
+}
+
+static INLINE
+void
+put_long_mem_x (context, base, reg, value)
+ sim_state_type *context;
+ int base;
+ int reg;
+ int value;
+{
+ put_long_mem_da (context, get_word_reg (context, reg) + base, value);
+}
+
+static INLINE
+void
+put_word_mem_x (context, base, reg, value)
+ sim_state_type *context;
+ int base;
+ int reg;
+ int value;
+{
+ put_word_mem_da (context, get_word_reg (context, reg) + base, value);
+}
+
+static INLINE
+void
+put_byte_mem_x (context, base, reg, value)
+ sim_state_type *context;
+ int base;
+ int reg;
+ int value;
+{
+ put_byte_mem_da (context, get_word_reg (context, reg) + base, value);
+}
+
+static INLINE
+int
+get_word_mem_x (context, base, reg)
+ sim_state_type *context;
+ int base;
+ int reg;
+{
+ return get_word_mem_da (context, base + get_word_reg (context, reg));
+}
+
+static INLINE
+int
+get_byte_mem_x (context, base, reg)
+ sim_state_type *context;
+ int base;
+ int reg;
+{
+ return get_byte_mem_da (context, base + get_word_reg (context, reg));
+}
+
+static INLINE
+int
+get_long_mem_x (context, base, reg)
+ sim_state_type *context;
+ int base;
+ int reg;
+{
+ return get_long_mem_da (context, base + get_word_reg (context, reg));
+}
+
+
+static
+void
+makeflags (context, mask)
+ sim_state_type *context;
+ int mask;
+{
+
+ PSW_ZERO = (context->dst & mask) == 0;
+ PSW_SIGN = (context->dst >> (context->size - 1));
+
+ if (context->broken_flags == TST_FLAGS)
+ {
+ extern char the_parity[];
+
+ if (context->size == 8)
+ {
+ PSW_OVERFLOW = the_parity[context->dst & 0xff];
+ }
+ }
+ else
+ {
+ /* Overflow is set if both operands have the same sign and the
+ result is of different sign.
+
+ V = A==B && R!=B jumping logic
+ (~(A^B))&(R^B)
+ V = (A^B)^(R^B) boolean
+ */
+
+ PSW_OVERFLOW =
+ ((
+ (~(context->srca ^ context->srcb)
+ & (context->srca ^ context->dst))
+ ) >> (context->size - 1)
+ );
+
+ if (context->size < 32)
+ {
+ PSW_CARRY = ((context->dst >> context->size)) & 1;
+ }
+ else
+ {
+ /* carry is set when the result is smaller than a source */
+
+
+ PSW_CARRY = (unsigned) context->dst > (unsigned) context->srca ;
+
+ }
+ }
+ context->broken_flags = 0;
+}
+
+
+/* There are two ways to calculate the flags. We can
+ either always calculate them and so the cc will always
+ be correct, or we can only keep the arguments around and
+ calc the flags when they're actually going to be used. */
+
+/* Right now we always calc the flags - I think it may be faster*/
+
+
+#define NORMAL_FLAGS(c,s,d,sa,sb,sub) \
+ if (s == 8) \
+ normal_flags_8(c,d,sa,sb,sub); \
+ else if (s == 16) \
+ normal_flags_16(c,d,sa,sb,sub); \
+ else if (s == 32) \
+ normal_flags_32(c,d,sa,sb,sub);
+
+static INLINE
+void
+normal_flags (context, size, dst, srca, srcb)
+ sim_state_type *context;
+ int size;
+ int dst;
+ int srca;
+ int srcb;
+{
+ context->srca = srca;
+ context->srcb = srcb;
+ context->dst = dst;
+ context->size = size;
+ context->broken_flags = CMP_FLAGS;
+}
+
+static INLINE
+void
+TEST_NORMAL_FLAGS (context, size, dst)
+ sim_state_type *context;
+ int size;
+ int dst;
+{
+ context->dst = dst;
+ context->size = size;
+ context->broken_flags = TST_FLAGS;
+}
+
+static INLINE
+void
+put_ptr_long_reg (context, reg, val)
+ sim_state_type *context;
+ int reg;
+ int val;
+{
+ context->regs[reg].word = (val >> 8) & 0x7f00;
+ context->regs[reg + 1].word = val;
+}
+
+static INLINE
+long
+get_ptr_long_reg (context, reg)
+ sim_state_type *context;
+ int reg;
+{
+ int val;
+
+ val = (context->regs[reg].word << 8) | context->regs[reg + 1].word;
+ return val;
+}
+
+static INLINE
+long
+get_ptr_long_mem_ir (context, reg)
+sim_state_type *context;
+int reg;
+{
+ return sitoptr (get_long_mem_da (context, get_ptr_long_reg (context, reg)));
+}
+
+static INLINE
+long
+get_ptr_long_mem_da (context, addr)
+sim_state_type *context;
+long addr;
+{
+ return sitoptr (get_long_mem_da (context, addr));
+}
+
+static INLINE
+void
+put_ptr_long_mem_da (context, addr, ptr)
+sim_state_type *context;
+long addr;
+long ptr;
+{
+ put_long_mem_da (context, addr, ptrtosi (ptr));
+
+}
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