From: Richard Henderson <rth@cygnus.com>
Date: Fri, 6 Oct 2000 05:32:59 +0000 (-0700)
Subject: longlong.h [alpha] (count_leading_zeros): Use cmpbge with a zero instead of -1.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=29279975b86791aeb42b8d3e6bc8c001c7bb030b;p=gcc.git

longlong.h [alpha] (count_leading_zeros): Use cmpbge with a zero instead of -1.

        * longlong.h [alpha] (count_leading_zeros): Use cmpbge with
        a zero instead of -1.
        (count_trailing_zeros): Likewise.

From-SVN: r36745
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 111b37d45fe..c1bb180bab2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -5,6 +5,10 @@
 	(__clz_tab): Put in its own unit, non-static.
 	* libgcc2.h: Always include longlong.h.
 
+	* longlong.h [alpha] (count_leading_zeros): Use cmpbge with
+	a zero instead of -1.
+	(count_trailing_zeros): Likewise.
+
 2000-10-05  Richard Henderson  <rth@cygnus.com>
 
 	* config/alpha/alpha.c (alpha_emit_setcc): Don't swap GT tests
diff --git a/gcc/longlong.h b/gcc/longlong.h
index 25b952c081c..bcd4abc843e 100644
--- a/gcc/longlong.h
+++ b/gcc/longlong.h
@@ -180,7 +180,7 @@ extern const UQItype __clz_tab[];
 #define count_leading_zeros(COUNT,X) \
   do {									\
     UDItype __xr = (X), __t, __a;					\
-    __asm__("cmpbge %1,%2,%0" : "=r"(__t) : "r"(~__xr), "r"(-1));	\
+    __asm__("cmpbge $31,%1,%0" : "=r"(__t) : "r"(__xr));		\
     __a = __clz_tab[__t ^ 0xff] - 1;					\
     __asm__("extbl %1,%2,%0" : "=r"(__t) : "r"(__xr), "r"(__a));	\
     (COUNT) = 64 - (__clz_tab[__t] + __a*8);				\
@@ -188,7 +188,7 @@ extern const UQItype __clz_tab[];
 #define count_trailing_zeros(COUNT,X) \
   do {									\
     UDItype __xr = (X), __t, __a;					\
-    __asm__("cmpbge %1,%2,%0" : "=r"(__t) : "r"(~__xr), "r"(-1));	\
+    __asm__("cmpbge $31,%1,%0" : "=r"(__t) : "r"(__xr));		\
     __t = ~__t & -~__t;							\
     __a = ((__t & 0xCC) != 0) * 2;					\
     __a += ((__t & 0xF0) != 0) * 4;					\