322 lines
7.4 KiB
C
322 lines
7.4 KiB
C
/*====================================================================
|
|
|
|
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
|
|
|
|
inline u16 ToMask(u16 a)
|
|
{
|
|
a = a | (a >> 8);
|
|
a = a | (a >> 4);
|
|
a = a | (a >> 2);
|
|
return a | (a >> 1);
|
|
}
|
|
|
|
inline s16 dsp_increment_addr_reg(int reg, s32 value = -1)
|
|
{
|
|
u16 tmb = ToMask(g_dsp.r[DSP_REG_WR0 + reg]);
|
|
s16 tmp;
|
|
if (value == -1)
|
|
tmp = g_dsp.r[reg];
|
|
else
|
|
tmp = value;
|
|
|
|
if ((tmp & tmb) == tmb)
|
|
tmp ^= g_dsp.r[DSP_REG_WR0 + reg];
|
|
else
|
|
tmp++;
|
|
|
|
return tmp;
|
|
}
|
|
|
|
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
|
|
inline s16 dsp_decrement_addr_reg(int reg, s32 value = -1)
|
|
{
|
|
s16 tmp;
|
|
if (value == -1)
|
|
tmp = g_dsp.r[reg];
|
|
else
|
|
tmp = value;
|
|
|
|
// This one is easy. Looks like a hw implementation. Increment is worse...
|
|
if ((tmp & g_dsp.r[DSP_REG_WR0 + reg]) == 0)
|
|
tmp |= g_dsp.r[DSP_REG_WR0 + reg];
|
|
else
|
|
tmp--;
|
|
|
|
return tmp;
|
|
}
|
|
|
|
inline s16 dsp_increase_addr_reg(int reg, s16 value)
|
|
{
|
|
s16 tmp = - 1;
|
|
|
|
// TODO: DO RIGHT!
|
|
if (value > 0) {
|
|
for (int i = 0; i < value; i++) {
|
|
tmp = dsp_increment_addr_reg(reg, tmp);
|
|
}
|
|
} else if (value < 0) {
|
|
for (int i = 0; i < (int)(-value); i++) {
|
|
tmp = dsp_decrement_addr_reg(reg, tmp);
|
|
}
|
|
} else
|
|
tmp = g_dsp.r[reg];
|
|
|
|
return tmp;
|
|
}
|
|
|
|
inline s16 dsp_decrease_addr_reg(int reg, s16 value)
|
|
{
|
|
s16 tmp = - 1;
|
|
|
|
// TODO: DO RIGHT!
|
|
if (value > 0) {
|
|
for (int i = 0; i < value; i++) {
|
|
tmp = dsp_decrement_addr_reg(reg, tmp);
|
|
}
|
|
} else if (value < 0) {
|
|
for (int i = 0; i < (int)(-value); i++) {
|
|
tmp = dsp_increment_addr_reg(reg, tmp);
|
|
}
|
|
} else
|
|
tmp = g_dsp.r[reg];
|
|
|
|
return tmp;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------------------
|
|
// --- 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)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] = (u16)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
|