Removing HP_TIMING_ZERO as unused

sysdeps/alpha/hp-timing.h

@@ -42,8 +42,6 @@
    - hp_timing_t: This is the type for variables used to store the time
      values.
 
-   - HP_TIMING_ZERO: clear `hp_timing_t' object.
-
    - HP_TIMING_NOW: place timestamp for current time in variable given as
      parameter.
 
@@ -77,9 +75,6 @@
 /* We use 32 bit values for the times.  */
 typedef unsigned int hp_timing_t;
 
-/* Set timestamp value to zero.  */
-#define HP_TIMING_ZERO(VAR)	(VAR) = (0)
-
 /* The "rpcc" instruction returns a 32-bit counting half and a 32-bit
    "virtual cycle counter displacement".  Subtracting the two gives us
    a virtual cycle count.  */

sysdeps/generic/hp-timing.h

@@ -39,8 +39,6 @@
    - hp_timing_t: This is the type for variables used to store the time
      values.
 
-   - HP_TIMING_ZERO: clear `hp_timing_t' object.
-
    - HP_TIMING_NOW: place timestamp for current time in variable given as
      parameter.
 
@@ -68,7 +66,6 @@
 #define HP_TIMING_AVAIL		(0)
 #define HP_TIMING_INLINE	(0)
 typedef int hp_timing_t;
-#define HP_TIMING_ZERO(Var)
 #define HP_TIMING_NOW(var)
 #define HP_TIMING_DIFF_INIT()
 #define HP_TIMING_DIFF(Diff, Start, End)

sysdeps/i386/i686/hp-timing.h

@@ -49,8 +49,6 @@
    - hp_timing_t: This is the type for variables used to store the time
      values.
 
-   - HP_TIMING_ZERO: clear `hp_timing_t' object.
-
    - HP_TIMING_NOW: place timestamp for current time in variable given as
      parameter.
 
@@ -83,9 +81,6 @@
 /* We use 64bit values for the times.  */
 typedef unsigned long long int hp_timing_t;
 
-/* Set timestamp value to zero.  */
-#define HP_TIMING_ZERO(Var)	(Var) = (0)
-
 /* That's quite simple.  Use the `rdtsc' instruction.  Note that the value
    might not be 100% accurate since there might be some more instructions
    running in this moment.  This could be changed by using a barrier like

sysdeps/ia64/hp-timing.h

@@ -43,8 +43,6 @@
    - hp_timing_t: This is the type for variables used to store the time
      values.
 
-   - HP_TIMING_ZERO: clear `hp_timing_t' object.
-
    - HP_TIMING_NOW: place timestamp for current time in variable given as
      parameter.
 
@@ -77,10 +75,6 @@
 /* We use 64bit values for the times.  */
 typedef unsigned long int hp_timing_t;
 
-/* Set timestamp value to zero.  */
-#define HP_TIMING_ZERO(Var)	(Var) = (0)
-
-
 /* The Itanium/Merced has a bug where the ar.itc register value read
    is not correct in some situations.  The solution is to read again.
    For now we always do this until we know how to recognize a fixed

sysdeps/powerpc/powerpc32/power4/hp-timing.h

@@ -42,8 +42,6 @@
    - hp_timing_t: This is the type for variables used to store the time
      values.
 
-   - HP_TIMING_ZERO: clear `hp_timing_t' object.
-
    - HP_TIMING_NOW: place timestamp for current time in variable given as
      parameter.
 
@@ -76,9 +74,6 @@
 /* We use 64bit values for the times.  */
 typedef unsigned long long int hp_timing_t;
 
-/* Set timestamp value to zero.  */
-#define HP_TIMING_ZERO(Var)	(Var) = (0)
-
 /* That's quite simple.  Use the `mftb' instruction.  Note that the value
    might not be 100% accurate since there might be some more instructions
    running in this moment.  This could be changed by using a barrier like

sysdeps/powerpc/powerpc64/hp-timing.h

@@ -42,8 +42,6 @@
    - hp_timing_t: This is the type for variables used to store the time
      values.
 
-   - HP_TIMING_ZERO: clear `hp_timing_t' object.
-
    - HP_TIMING_NOW: place timestamp for current time in variable given as
      parameter.
 
@@ -76,9 +74,6 @@
 /* We use 64bit values for the times.  */
 typedef unsigned long long int hp_timing_t;
 
-/* Set timestamp value to zero.  */
-#define HP_TIMING_ZERO(Var)	(Var) = (0)
-
 /* That's quite simple.  Use the `mftb' instruction.  Note that the value
    might not be 100% accurate since there might be some more instructions
    running in this moment.  This could be changed by using a barrier like

sysdeps/sparc/sparc32/sparcv9/hp-timing.h

@@ -29,8 +29,6 @@
 
 typedef unsigned long long int hp_timing_t;
 
-#define HP_TIMING_ZERO(Var)	(Var) = (0)
-
 #define HP_TIMING_NOW(Var) \
       __asm__ __volatile__ ("rd %%tick, %L0\n\t" \
 			    "srlx %L0, 32, %H0" \

sysdeps/sparc/sparc64/hp-timing.h

@@ -29,8 +29,6 @@
 
 typedef unsigned long int hp_timing_t;
 
-#define HP_TIMING_ZERO(Var)	(Var) = (0)
-
 #define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rd %%tick, %0" : "=r" (Var))
 
 #define HP_TIMING_DIFF_INIT() \