dolphin/Source/Core/DSPCore/Src/DSPStacks.cpp

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/*====================================================================
filename: gdsp_registers.cpp
project: GCemu
created: 2004-6-18
mail: duddie@walla.com
Copyright (c) 2005 Duddie & Tratax
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.
====================================================================*/
#include "Common.h"
#include "DSPCore.h"
#include "DSPStacks.h"
// Stacks. The stacks are outside the DSP RAM, in dedicated hardware.
void dsp_reg_stack_push(int stack_reg)
{
g_dsp.reg_stack_ptr[stack_reg]++;
g_dsp.reg_stack_ptr[stack_reg] &= DSP_STACK_MASK;
g_dsp.reg_stack[stack_reg][g_dsp.reg_stack_ptr[stack_reg]] = g_dsp.r.st[stack_reg];
}
void dsp_reg_stack_pop(int stack_reg)
{
g_dsp.r.st[stack_reg] = g_dsp.reg_stack[stack_reg][g_dsp.reg_stack_ptr[stack_reg]];
g_dsp.reg_stack_ptr[stack_reg]--;
g_dsp.reg_stack_ptr[stack_reg] &= DSP_STACK_MASK;
}
void dsp_reg_store_stack(int stack_reg, u16 val)
{
dsp_reg_stack_push(stack_reg);
g_dsp.r.st[stack_reg] = val;
}
u16 dsp_reg_load_stack(int stack_reg)
{
u16 val = g_dsp.r.st[stack_reg];
dsp_reg_stack_pop(stack_reg);
return val;
}