Improve doTimers (#20)

kremi151 · Dec 29, 2020 · 31dd2fc · 31dd2fc
1 parent d4c4b18
commit 31dd2fc
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Showing 3 changed files with 8 additions and 3 deletions.
diff --git a/core/source/emulator/cpu.cpp b/core/source/emulator/cpu.cpp
@@ -344,12 +344,12 @@ void CPU::doTimers(Memory &memory, u8 clocks) {
             timerOverflowingCycles = -1;
         }
     }
-    u8 tac = memory.getTAC();
+    u8_fast tac = memory.getTAC();
     bool comp1 = (tac & 0b100u) != 0;
     comp1 &= doTimerObscureCheck(clocks, sysCounter, tac);
     // Falling edge detector
     if (delayedTIMAIncrease && !comp1) {
-        u8 tima = memory.getTIMA();
+        u8_fast tima = memory.getTIMA();
         if (tima == 0xff) {
             //fprintf(stdout, "# TIMA has overflown\n");
             // Delay TIMA load by 1 m-cycle

diff --git a/core/source/emulator/cpu.h b/core/source/emulator/cpu.h
@@ -52,7 +52,7 @@ namespace FunkyBoy {
 
         u8 registers[8]{};
 
-        i8 timerOverflowingCycles;
+        int timerOverflowingCycles;
         bool delayedTIMAIncrease;
 
         bool joypadWasNotPressed;

diff --git a/core/source/util/typedefs.h b/core/source/util/typedefs.h
@@ -31,6 +31,11 @@ namespace FunkyBoy {
     typedef uint32_t u32;
     typedef uint64_t u64;
 
+    typedef uint_fast8_t u8_fast;
+    typedef uint_fast16_t u16_fast;
+    typedef uint_fast32_t u32_fast;
+    typedef uint_fast64_t u64_fast;
+
     typedef u32 memory_address;
 
     typedef int8_t i8;