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10d73988e7
Makes it more self-documenting which stack is being loaded or stored to, as C, D, and magic numbers are extremely vague. It also enforces a strongly-typed API instead of accepting arbitrary integral values. It also adds the two other missing stack register names -- loop address and loop counter.
47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Copyright 2004 Duddie & Tratax
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "Core/DSP/DSPStacks.h"
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#include <cstddef>
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#include "Common/CommonTypes.h"
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#include "Core/DSP/DSPCore.h"
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// Stacks. The stacks are outside the DSP RAM, in dedicated hardware.
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namespace DSP
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{
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static void dsp_reg_stack_push(size_t stack_reg)
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{
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g_dsp.reg_stack_ptr[stack_reg]++;
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g_dsp.reg_stack_ptr[stack_reg] &= DSP_STACK_MASK;
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g_dsp.reg_stack[stack_reg][g_dsp.reg_stack_ptr[stack_reg]] = g_dsp.r.st[stack_reg];
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}
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static void dsp_reg_stack_pop(size_t stack_reg)
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{
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g_dsp.r.st[stack_reg] = g_dsp.reg_stack[stack_reg][g_dsp.reg_stack_ptr[stack_reg]];
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g_dsp.reg_stack_ptr[stack_reg]--;
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g_dsp.reg_stack_ptr[stack_reg] &= DSP_STACK_MASK;
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}
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void dsp_reg_store_stack(StackRegister stack_reg, u16 val)
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{
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const auto reg_index = static_cast<size_t>(stack_reg);
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dsp_reg_stack_push(reg_index);
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g_dsp.r.st[reg_index] = val;
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}
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u16 dsp_reg_load_stack(StackRegister stack_reg)
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{
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const auto reg_index = static_cast<size_t>(stack_reg);
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const u16 val = g_dsp.r.st[reg_index];
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dsp_reg_stack_pop(reg_index);
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return val;
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}
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} // namespace DSP
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