DSP: build fixin', more movin', some comments.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3564 8ced0084-cf51-0410-be5f-012b33b47a6e

1 files changed, 59 insertions, 0 deletions

diff --git a/Source/Core/DSPCore/Src/DSPStacks.cpp b/Source/Core/DSPCore/Src/DSPStacks.cpp
new file mode 100644
index 0000000000..af9f74c18d
--- /dev/null
+++ b/Source/Core/DSPCore/Src/DSPStacks.cpp
@@ -0,0 +1,59 @@
+/*====================================================================
+
+   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 "DSPInterpreter.h"
+#include "DSPStacks.h"
+
+// Stacks. The stacks are outside the DSP RAM, in dedicated hardware.
+
+void dsp_reg_stack_push(u8 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[DSP_REG_ST0 + stack_reg];
+}
+
+void dsp_reg_stack_pop(u8 stack_reg)
+{
+	g_dsp.r[DSP_REG_ST0 + 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(u8 stack_reg, u16 val)
+{
+	dsp_reg_stack_push(stack_reg);
+	g_dsp.r[DSP_REG_ST0 + stack_reg] = val;
+}
+
+u16 dsp_reg_load_stack(u8 stack_reg)
+{
+	u16 val = g_dsp.r[DSP_REG_ST0 + stack_reg];
+	dsp_reg_stack_pop(stack_reg);
+	return val;
+}