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authorbunnei <ericbunnie@gmail.com>2014-06-06 06:06:33 +0200
committerbunnei <ericbunnie@gmail.com>2014-06-13 15:51:09 +0200
commit0deeda54eefb18aaf6a62b8ec139cfe9bd21769c (patch)
tree8c39407c4f6b9fa711dd8f525ca0efe5c2682f87 /src
parentCore: Changed HW update/thread reschedule to occur more frequently (assume each instruction is ~3 cycles) (diff)
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Diffstat (limited to 'src')
-rw-r--r--src/core/core.cpp23
-rw-r--r--src/core/hw/lcd.h3
2 files changed, 14 insertions, 12 deletions
diff --git a/src/core/core.cpp b/src/core/core.cpp
index 6ec25fdd4..26d52f7be 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -18,14 +18,15 @@
namespace Core {
-ARM_Disasm* g_disasm = NULL; ///< ARM disassembler
-ARM_Interface* g_app_core = NULL; ///< ARM11 application core
-ARM_Interface* g_sys_core = NULL; ///< ARM11 system (OS) core
+u64 g_last_ticks = 0; ///< Last CPU ticks
+ARM_Disasm* g_disasm = NULL; ///< ARM disassembler
+ARM_Interface* g_app_core = NULL; ///< ARM11 application core
+ARM_Interface* g_sys_core = NULL; ///< ARM11 system (OS) core
/// Run the core CPU loop
void RunLoop() {
for (;;){
- g_app_core->Run(LCD::kFrameTicks / 3);
+ g_app_core->Run(LCD::kFrameTicks);
HW::Update();
Kernel::Reschedule();
}
@@ -33,16 +34,14 @@ void RunLoop() {
/// Step the CPU one instruction
void SingleStep() {
- static int ticks = 0;
-
g_app_core->Step();
-
- if ((ticks >= LCD::kFrameTicks / 3) || HLE::g_reschedule) {
+
+ // Update and reschedule after approx. 1 frame
+ u64 current_ticks = Core::g_app_core->GetTicks();
+ if ((current_ticks - g_last_ticks) >= LCD::kFrameTicks || HLE::g_reschedule) {
+ g_last_ticks = current_ticks;
HW::Update();
Kernel::Reschedule();
- ticks = 0;
- } else {
- ticks++;
}
}
@@ -64,6 +63,8 @@ int Init() {
g_app_core = new ARM_Interpreter();
g_sys_core = new ARM_Interpreter();
+ g_last_ticks = Core::g_app_core->GetTicks();
+
return 0;
}
diff --git a/src/core/hw/lcd.h b/src/core/hw/lcd.h
index 41baa51d0..7484f8f66 100644
--- a/src/core/hw/lcd.h
+++ b/src/core/hw/lcd.h
@@ -8,7 +8,8 @@
namespace LCD {
-static const u32 kFrameTicks = 268123480 / 60; ///< 268MHz / 60 frames per second
+static const u32 kFrameCycles = 268123480 / 60; ///< 268MHz / 60 frames per second
+static const u32 kFrameTicks = kFrameCycles / 3; ///< Approximate number of instructions/frame
struct Registers {
u32 framebuffer_top_left_1;