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vm::stackvar (experimental)
Should be convenient for small allocations which would be done on stack on real console
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parent
5ffc6ffca5
commit
3f44e07b7c
9 changed files with 272 additions and 44 deletions
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@ -1,5 +1,7 @@
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#include "stdafx.h"
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#include "Memory.h"
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#include "Emu/CPU/CPUThread.h"
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#include "Emu/Cell/PPUThread.h"
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namespace vm
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{
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@ -143,4 +145,84 @@ namespace vm
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{
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Memory.Close();
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}
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u32 stack_push(CPUThread& CPU, u32 size, u32 align_v, u32& old_pos)
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{
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switch (CPU.GetType())
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{
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case CPU_THREAD_PPU:
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{
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PPUThread& PPU = static_cast<PPUThread&>(CPU);
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assert(align_v);
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old_pos = (u32)PPU.GPR[1];
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PPU.GPR[1] -= align(size, 8); // room minimal possible size
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PPU.GPR[1] &= ~(align_v - 1); // fix stack alignment
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if (PPU.GPR[1] < CPU.GetStackAddr())
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{
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// stack overflow
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PPU.GPR[1] = old_pos;
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return 0;
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}
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else
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{
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return (u32)PPU.GPR[1];
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}
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}
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case CPU_THREAD_SPU:
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case CPU_THREAD_RAW_SPU:
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{
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assert(!"stack_push(): SPU not supported");
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return 0;
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}
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case CPU_THREAD_ARMv7:
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{
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assert(!"stack_push(): ARMv7 not supported");
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return 0;
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}
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default:
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{
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assert(!"stack_push(): invalid thread type");
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return 0;
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}
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}
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}
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void stack_pop(CPUThread& CPU, u32 addr, u32 old_pos)
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{
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switch (CPU.GetType())
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{
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case CPU_THREAD_PPU:
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{
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PPUThread& PPU = static_cast<PPUThread&>(CPU);
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assert(PPU.GPR[1] == addr);
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PPU.GPR[1] = old_pos;
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return;
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}
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case CPU_THREAD_SPU:
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case CPU_THREAD_RAW_SPU:
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{
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assert(!"stack_pop(): SPU not supported");
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return;
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}
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case CPU_THREAD_ARMv7:
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{
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assert(!"stack_pop(): ARMv7 not supported");
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return;
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}
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default:
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{
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assert(!"stack_pop(): invalid thread type");
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return;
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}
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}
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}
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}
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