2 files changed, 69 insertions, 38 deletions
diff --git a/libtommath/etc/timer.asm b/libtommath/etc/timer.asm
index 35890d9..326a947 100644
--- a/libtommath/etc/timer.asm
+++ b/libtommath/etc/timer.asm
@@ -1,37 +1,37 @@
-; x86 timer in NASM
-;
-; Tom St Denis, tomstdenis@iahu.ca
-[bits 32]
-[section .data]
-time dd 0, 0
-
-[section .text]
-
-%ifdef USE_ELF
-[global t_start]
-t_start:
-%else
-[global _t_start]
-_t_start:
-%endif
-   push edx
-   push eax
-   rdtsc
-   mov [time+0],edx
-   mov [time+4],eax
-   pop eax
-   pop edx
-   ret
-   
-%ifdef USE_ELF
-[global t_read]
-t_read:
-%else
-[global _t_read]
-_t_read:
-%endif
-   rdtsc
-   sub eax,[time+4]
-   sbb edx,[time+0]
-   ret
+; x86 timer in NASM
+;
+; Tom St Denis, tomstdenis@iahu.ca
+[bits 32]
+[section .data]
+time dd 0, 0
+
+[section .text]
+
+%ifdef USE_ELF
+[global t_start]
+t_start:
+%else
+[global _t_start]
+_t_start:
+%endif
+   push edx
+   push eax
+   rdtsc
+   mov [time+0],edx
+   mov [time+4],eax
+   pop eax
+   pop edx
+   ret
+   
+%ifdef USE_ELF
+[global t_read]
+t_read:
+%else
+[global _t_read]
+_t_read:
+%endif
+   rdtsc
+   sub eax,[time+4]
+   sbb edx,[time+0]
+   ret
    
 \ No newline at end of file
diff --git a/libtommath/etc/tune.c b/libtommath/etc/tune.c
index 14aace2..d054d10 100644
--- a/libtommath/etc/tune.c
+++ b/libtommath/etc/tune.c
@@ -10,13 +10,44 @@
  */
 #define TIMES (1UL<<14UL)
 
+/* RDTSC from Scott Duplichan */
+static ulong64 TIMFUNC (void)
+   {
+   #if defined __GNUC__
+      #if defined(__i386__) || defined(__x86_64__)
+         unsigned long long a;
+         __asm__ __volatile__ ("rdtsc\nmovl %%eax,%0\nmovl %%edx,4+%0\n"::"m"(a):"%eax","%edx");
+         return a;
+      #else /* gcc-IA64 version */
+         unsigned long result;
+         __asm__ __volatile__("mov %0=ar.itc" : "=r"(result) :: "memory");
+         while (__builtin_expect ((int) result == -1, 0))
+         __asm__ __volatile__("mov %0=ar.itc" : "=r"(result) :: "memory");
+         return result;
+      #endif
+
+   // Microsoft and Intel Windows compilers
+   #elif defined _M_IX86
+     __asm rdtsc
+   #elif defined _M_AMD64
+     return __rdtsc ();
+   #elif defined _M_IA64
+     #if defined __INTEL_COMPILER
+       #include <ia64intrin.h>
+     #endif
+      return __getReg (3116);
+   #else
+     #error need rdtsc function for this build
+   #endif
+   }
+
 
 #ifndef X86_TIMER
 
 /* generic ISO C timer */
 ulong64 LBL_T;
-void t_start(void) { LBL_T = clock(); }
-ulong64 t_read(void) { return clock() - LBL_T; }
+void t_start(void) { LBL_T = TIMFUNC(); }
+ulong64 t_read(void) { return TIMFUNC() - LBL_T; }
 
 #else
 extern void t_start(void);