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/* sprs.h -- OR1K architecture specific special-purpose registers
   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
This program 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 of the License, or
(at your option) any later version.
 
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
/* Prototypes */
void mtspr(uint16_t regno, const uorreg_t value);
uorreg_t mfspr(const uint16_t regno);
void sprs_status(void);
 
/* Set specific SPR bit(s) identified by mask. */
static inline void
setsprbits(const int regno, const unsigned long mask, const unsigned long value)
{
  uorreg_t regvalue = cpu_state.sprs[regno];
  uorreg_t shifted = 0x0;
  int m, v = 0;
 
  /* m counts bits in valuemask */
  /* v counts bits in value */
  for (m = 0; m < 32; m++)
    if ((mask >> m) & 0x1) {
      shifted |= ((value >> v) & 0x1) << m;
      v++;
    }
 
  /* PRINTF("oldvalue %x setsprbits(%x, %x, %x)  shifted %x", regvalue, regno, mask, value, shifted); */
  cpu_state.sprs[regno] = (regvalue & ~mask) | shifted;
}
 
/* Get specific SPR bit(s) identified by mask. */
static inline unsigned long
getsprbits(const int regno, const unsigned long mask)
{
  uorreg_t regvalue = cpu_state.sprs[regno];
  uorreg_t shifted = 0x0;
  int m, v = 0;
 
  /* m counts bits in valuemask */
  /* v counts bits in regvalue */
  for (m = 0; m < 32; m++)
    if ((mask >> m) & 0x1) {
      shifted |= ((regvalue >> m) & 0x1) << v;
      v++;
    }
 
  return shifted;
}