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/*====================================================================
filename: gdsp_opcodes_helper.h
project: GameCube DSP Tool (gcdsp)
created: 2005.03.04
mail: duddie@walla.com
Copyright (c) 2005 Duddie
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
====================================================================*/
#ifndef _DSP_INT_UTIL_H
#define _DSP_INT_UTIL_H
#include "Common.h"
#include "DSPInterpreter.h"
#include "DSPCore.h"
#include "DSPMemoryMap.h"
#include "DSPStacks.h"
// ---------------------------------------------------------------------------------------
// --- SR
// ---------------------------------------------------------------------------------------
inline void dsp_SR_set_flag(int flag)
{
g_dsp.r[DSP_REG_SR] |= flag;
}
inline bool dsp_SR_is_flag_set(int flag)
{
return (g_dsp.r[DSP_REG_SR] & flag) != 0;
}
// ---------------------------------------------------------------------------------------
// --- AR increments, decrements
// ---------------------------------------------------------------------------------------
//
// HORRIBLE UGLINESS, someone please fix.
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
//
// increment, decrement 100% ok (as far as i can tell), increase, decrease still probs
// NextPowerOf2()-1
inline u16 ToMask(u16 a)
{
a = a | (a >> 8);
a = a | (a >> 4);
a = a | (a >> 2);
return a | (a >> 1);
}
inline u16 dsp_increment_addr_reg(u16 reg, u16 ar)
{
u16 wr = g_dsp.r[DSP_REG_WR0 + reg];
u16 tmb = ToMask(wr);
if ((ar & tmb) == tmb)
ar-=wr;
else
ar++;
return ar;
}
inline u16 dsp_increment_addr_reg(u16 reg)
{
return dsp_increment_addr_reg(reg, g_dsp.r[reg]);
}
inline u16 dsp_decrement_addr_reg(u16 reg, u16 ar)
{
u16 wr = g_dsp.r[DSP_REG_WR0 + reg];
u16 tmb = ToMask(wr);
u16 min = (tmb+1-ar)&tmb;
if ((wr < min) || !min)
ar+=wr;
else
ar--;
return ar;
}
inline u16 dsp_decrement_addr_reg(u16 reg)
{
return dsp_decrement_addr_reg(reg, g_dsp.r[reg]);
}
inline u16 dsp_increase_addr_reg(u16 reg, s16 ix)
{
u16 ar = g_dsp.r[reg];
if (ix > 0) {
for (s32 i = 0; i < ix; i++) {
ar = dsp_increment_addr_reg(reg, ar);
}
} else if (ix < 0) {
for (s32 i = 0; i < (-ix); i++) {
ar = dsp_decrement_addr_reg(reg, ar);
}
}
return ar;
}
inline u16 dsp_decrease_addr_reg(u16 reg, s16 ix)
{
u16 ar = g_dsp.r[reg];
if (ix > 0) {
for (s32 i = 0; i < ix; i++) {
ar = dsp_decrement_addr_reg(reg, ar);
}
} else if (ix < 0) {
for (s32 i = 0; i < (-ix); i++) {
ar = dsp_increment_addr_reg(reg, ar);
}
}
return ar;
}
// ---------------------------------------------------------------------------------------
// --- reg
// ---------------------------------------------------------------------------------------
inline u16 dsp_op_read_reg(int reg)
{
switch (reg & 0x1f) {
case DSP_REG_ST0:
case DSP_REG_ST1:
case DSP_REG_ST2:
case DSP_REG_ST3:
return dsp_reg_load_stack(reg - 0x0c);
default:
return g_dsp.r[reg];
}
}
inline void dsp_op_write_reg(int reg, u16 val)
{
switch (reg & 0x1f) {
// 8-bit sign extended registers. Should look at prod.h too...
case DSP_REG_ACH0:
case DSP_REG_ACH1:
// sign extend from the bottom 8 bits.
g_dsp.r[reg] = (u16)(s16)(s8)(u8)val;
break;
case DSP_REG_ACM0:
case DSP_REG_ACM1:
g_dsp.r[reg] = val;
break;
// Stack registers.
case DSP_REG_ST0:
case DSP_REG_ST1:
case DSP_REG_ST2:
case DSP_REG_ST3:
dsp_reg_store_stack(reg - 0x0c, val);
break;
default:
g_dsp.r[reg] = val;
break;
}
}
inline void dsp_conditional_extend_accum(int reg)
{
switch (reg)
{
case DSP_REG_ACM0:
case DSP_REG_ACM1:
if (g_dsp.r[DSP_REG_SR] & SR_40_MODE_BIT)
{
// Sign extend into whole accum.
u16 val = g_dsp.r[reg];
g_dsp.r[reg - DSP_REG_ACM0 + DSP_REG_ACH0] = (val & 0x8000) ? 0xFFFF : 0x0000;
g_dsp.r[reg - DSP_REG_ACM0 + DSP_REG_ACL0] = 0;
}
}
}
// ---------------------------------------------------------------------------------------
// --- prod
// ---------------------------------------------------------------------------------------
inline s64 dsp_get_long_prod()
{
#if PROFILE
ProfilerAddDelta(g_dsp.err_pc, 1);
#endif
s64 val = (s8)(u8)g_dsp.r[DSP_REG_PRODH];
val <<= 32;
s64 low_prod = g_dsp.r[DSP_REG_PRODM];
low_prod += g_dsp.r[DSP_REG_PRODM2];
low_prod <<= 16;
low_prod |= g_dsp.r[DSP_REG_PRODL];
val += low_prod;
return val;
}
inline s64 dsp_get_long_prod_round_prodl()
{
return (dsp_get_long_prod() + 0x7fff) & ~0xffff;
}
// For accurate emulation, this is wrong - but the real prod registers behave
// in completely bizarre ways. Probably not meaningful to emulate them accurately.
inline void dsp_set_long_prod(s64 val)
{
#if PROFILE
ProfilerAddDelta(g_dsp.err_pc, 1);
#endif
g_dsp.r[DSP_REG_PRODL] = (u16)val;
val >>= 16;
g_dsp.r[DSP_REG_PRODM] = (u16)val;
val >>= 16;
g_dsp.r[DSP_REG_PRODH] = (u8)val;
g_dsp.r[DSP_REG_PRODM2] = 0;
}
// ---------------------------------------------------------------------------------------
// --- ACC - main accumulators (40-bit)
// ---------------------------------------------------------------------------------------
inline s64 dsp_get_long_acc(int reg)
{
#if PROFILE
ProfilerAddDelta(g_dsp.err_pc, 1);
#endif
_assert_(reg < 2);
s64 high = (s64)(s8)g_dsp.r[DSP_REG_ACH0 + reg] << 32;
u32 mid_low = ((u32)g_dsp.r[DSP_REG_ACM0 + reg] << 16) | g_dsp.r[DSP_REG_ACL0 + reg];
return high | mid_low;
}
inline void dsp_set_long_acc(int _reg, s64 val)
{
#if PROFILE
ProfilerAddDelta(g_dsp.err_pc, 1);
#endif
_assert_(_reg < 2);
g_dsp.r[DSP_REG_ACL0 + _reg] = (u16)val;
val >>= 16;
g_dsp.r[DSP_REG_ACM0 + _reg] = (u16)val;
val >>= 16;
g_dsp.r[DSP_REG_ACH0 + _reg] = (u16)(s16)(s8)(u8)val;
}
inline s64 dsp_convert_long_acc(s64 val) // s64 -> s40
{
return ((s64)(s8)(val >> 32))<<32 | (u32)val;
}
inline s16 dsp_get_acc_l(int _reg)
{
_assert_(_reg < 2);
return g_dsp.r[DSP_REG_ACL0 + _reg];
}
inline s16 dsp_get_acc_m(int _reg)
{
_assert_(_reg < 2);
return g_dsp.r[DSP_REG_ACM0 + _reg];
}
inline s16 dsp_get_acc_h(int _reg)
{
_assert_(_reg < 2);
return g_dsp.r[DSP_REG_ACH0 + _reg];
}
// ---------------------------------------------------------------------------------------
// --- AX - extra accumulators (32-bit)
// ---------------------------------------------------------------------------------------
inline s32 dsp_get_long_acx(int _reg)
{
#if PROFILE
ProfilerAddDelta(g_dsp.err_pc, 1);
#endif
_assert_(_reg < 2);
return ((u32)g_dsp.r[DSP_REG_AXH0 + _reg] << 16) | g_dsp.r[DSP_REG_AXL0 + _reg];
}
inline s16 dsp_get_ax_l(int _reg)
{
_assert_(_reg < 2);
return (s16)g_dsp.r[DSP_REG_AXL0 + _reg];
}
inline s16 dsp_get_ax_h(int _reg)
{
_assert_(_reg < 2);
return (s16)g_dsp.r[DSP_REG_AXH0 + _reg];
}
#endif
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