1 files changed, 17 insertions, 10 deletions
diff --git a/inlineasm.h b/inlineasm.h
index 218c532..6e33660 100644
--- a/inlineasm.h
+++ b/inlineasm.h
@@ -63,21 +63,28 @@ static uint64_t memmeasure(char* memory, uint64_t offset)
 // rdtsc to save instrucions. it is not significantly faster than the
 // accurate one but it has fewer instrucions and by that is less likely
 // to be delayed by the scheduler
-// averages at about 72.5 ticks with an offset of 1
-static uint64_t  optmemmeasure(char* memory, uint64_t offset)
+static uint64_t  optmemmeasure(char* memoryFirst, char* memorySecond)
 {
-    asm(
+    asm volatile (
+        // load other value
+        "mov (%%rbx), %%rax ;"
+        
+        // start clock measure
         "rdtsc ;"
         "mov %%eax, %%edi ;"
-
-        // here be magic dragons and memory access (read segfaults) ahead
-        // TODO: evaluate if more cmp types (like w and l) do make sense
-        "cmpb $0x23, (%%rbx) ;"
-        "cmpb $0x42, (%%rbx,%%rcx) ;"
-
+        
+        // load second value
+        "mov (%%rcx), %%rdx ;"
+        
+        // stop clock measure
         "rdtsc ;"
         "sub %%edi, %%eax ;"
-        : : "b" (memory), "c" (offset)
+
+        // do shit
+        "xor (%%rax,%%rdx), %%rbx ;"
+        "mov %%rbx, (%%rcx) ;"
+
+        : : "b" (memoryFirst), "c" (memorySecond)
        );
 }