preserve-emulation/ppsspp
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Optimize thread switching a bit.

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~2.5% improvement in Zettai Hero Project (while multithreading.)
This commit is contained in:
Unknown W. Brackets committed 2013-08-15 01:26:16 -07:00
1 parent 5387e5c717
commit 846178a588
3 files changed
+35 -31
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Core/HLE/sceKernelThread.cpp
+6 -16
View File
@@ -1412,8 +1412,8 @@ u32 sceKernelGetThreadmanIdList(u32 type, u32 readBufPtr, u32 readBufSize, u32 i
// Saves the current CPU context
void __KernelSaveContext(ThreadContext *ctx, bool vfpuEnabled)
{
memcpy(ctx->r, currentMIPS->r, sizeof(ctx->r));
memcpy(ctx->f, currentMIPS->f, sizeof(ctx->f));
// r and f are immediately next to each other and must be.
memcpy(ctx->r, currentMIPS->r, sizeof(ctx->r) + sizeof(ctx->f));
if (vfpuEnabled)
{
@@ -1421,19 +1421,14 @@ void __KernelSaveContext(ThreadContext *ctx, bool vfpuEnabled)
memcpy(ctx->vfpuCtrl, currentMIPS->vfpuCtrl, sizeof(ctx->vfpuCtrl));
}
ctx->pc = currentMIPS->pc;
ctx->hi = currentMIPS->hi;
ctx->lo = currentMIPS->lo;
ctx->fcr0 = currentMIPS->fcr0;
ctx->fcr31 = currentMIPS->fcr31;
ctx->fpcond = currentMIPS->fpcond;
memcpy(ctx->other, currentMIPS->other, sizeof(ctx->other));
}
// Loads a CPU context
void __KernelLoadContext(ThreadContext *ctx, bool vfpuEnabled)
{
memcpy(currentMIPS->r, ctx->r, sizeof(ctx->r));
memcpy(currentMIPS->f, ctx->f, sizeof(ctx->f));
// r and f are immediately next to each other and must be.
memcpy(currentMIPS->r, ctx->r, sizeof(ctx->r) + sizeof(ctx->f));
if (vfpuEnabled)
{
@@ -1441,12 +1436,7 @@ void __KernelLoadContext(ThreadContext *ctx, bool vfpuEnabled)
memcpy(currentMIPS->vfpuCtrl, ctx->vfpuCtrl, sizeof(ctx->vfpuCtrl));
}
currentMIPS->pc = ctx->pc;
currentMIPS->hi = ctx->hi;
currentMIPS->lo = ctx->lo;
currentMIPS->fcr0 = ctx->fcr0;
currentMIPS->fcr31 = ctx->fcr31;
currentMIPS->fpcond = ctx->fpcond;
memcpy(currentMIPS->other, ctx->other, sizeof(ctx->other));
// Reset the llBit, the other thread may have touched memory.
currentMIPS->llBit = 0;