From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Tue, 7 Aug 2001 23:35:27 +0000 (+0000)
Subject: Ignore SIGFPE everywhere.
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=7014c40783484eed55bf735c99b9ec618f0b36dd;p=p5sagit%2Fp5-mst-13.2.git

Ignore SIGFPE everywhere.

p4raw-id: //depot/perl@11608
---

diff --git a/hints/os390.sh b/hints/os390.sh
index 4f6f370..4eff5a8 100644
--- a/hints/os390.sh
+++ b/hints/os390.sh
@@ -25,8 +25,6 @@ case "$ld" in
 esac
 
 # -DMAXSIG=38 maximum signal number
-# -DPERL_IGNORE_FPUSIG=SIGFPE allows Perl to be cavalier with FP overflow
-#   (particularly in numeric.c:S_mulexp10())
 # -DOEMVS is used in place of #ifdef __MVS__ in certain places.
 # -D_OE_SOCKETS alters system headers.
 # -D_XOPEN_SOURCE_EXTENDEDA alters system headers.
@@ -35,8 +33,8 @@ esac
 # -DEBCDIC should come from Configure and need not be mentioned here.
 # Prepend your favorites with Configure -Dccflags=your_favorites
 case "$ccflags" in
-'') ccflags='-DMAXSIG=38 -DPERL_IGNORE_FPUSIG=SIGFPE -DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -DYYDYNAMIC' ;;
-*) ccflags="$ccflags -DMAXSIG=38 -DPERL_IGNORE_FPUSIG=SIGFPE -DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -DYYDYNAMIC" ;;
+'') ccflags='-DMAXSIG=38 -DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -DYYDYNAMIC' ;;
+*) ccflags="$ccflags -DMAXSIG=38 -DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -DYYDYNAMIC" ;;
 esac
 
 # Turning on optimization breaks perl.
diff --git a/hints/posix-bc.sh b/hints/posix-bc.sh
index f844525..a7d3d2c 100644
--- a/hints/posix-bc.sh
+++ b/hints/posix-bc.sh
@@ -19,9 +19,8 @@ esac
 # -DPOSIX_BC
 # -DUSE_PURE_BISON
 # -D_XOPEN_SOURCE_EXTENDED alters system headers.
-# -DPERL_IGNORE_FPUSIG=SIGFPE
 # Prepend your favorites with Configure -Dccflags=your_favorites
-ccflags="$ccflags -Kenum_long,llm_case_lower,llm_keep,no_integer_overflow -DPOSIX_BC -DUSE_PURE_BISON -D_XOPEN_SOURCE_EXTENDED -DPERL_IGNORE_FPUSIG=SIGFPE"
+ccflags="$ccflags -Kenum_long,llm_case_lower,llm_keep,no_integer_overflow -DPOSIX_BC -DUSE_PURE_BISON -D_XOPEN_SOURCE_EXTENDED"
 
 # ccdlflags have yet to be determined.
 #case "$ccdlflags" in
diff --git a/hints/uts.sh b/hints/uts.sh
index 74bedbd..eb0d78c 100644
--- a/hints/uts.sh
+++ b/hints/uts.sh
@@ -1,7 +1,7 @@
 archname='s390'
 archobjs='uts/strtol_wrap.o uts/sprintf_wrap.o'
 cc='cc -Xa'
-ccflags='-XTSTRINGS=1500000 -DStrtol=strtol_wrap32 -DStrtoul=strtoul_wrap32 -DPERL_IGNORE_FPUSIG=SIGFPE -DSPRINTF_E_BUG'
+ccflags='-XTSTRINGS=1500000 -DStrtol=strtol_wrap32 -DStrtoul=strtoul_wrap32 -DSPRINTF_E_BUG'
 cccdlflags='-pic'
 d_bincompat3='undef'
 d_csh='undef' 
diff --git a/numeric.c b/numeric.c
index 8d94975..68c1671 100644
--- a/numeric.c
+++ b/numeric.c
@@ -572,24 +572,12 @@ S_mulexp10(NV value, I32 exponent)
 	negative = 1;
 	exponent = -exponent;
     }
-#ifdef __VAX /* avoid %SYSTEM-F-FLTOVF_F sans VAXC$ESTABLISH */
-#  if defined(__DECC_VER) && __DECC_VER <= 50390006
-    /* __F_FLT_MAX_10_EXP - 5 == 33 */
-    if (!negative &&
-          (log10(value) + exponent) >= (__F_FLT_MAX_10_EXP - 5))
-        return NV_MAX;
-#  endif
-#endif
-#if defined(__alpha) && defined(__unix__)
-    if (!negative &&
-	(log10(value) + exponent) >= (DBL_MAX_10_EXP))
-        return NV_INF;
-#endif
     for (bit = 1; exponent; bit <<= 1) {
 	if (exponent & bit) {
 	    exponent ^= bit;
 	    result *= power;
 	}
+	/* Floating point exceptions are supposed to be turned off. */
 	power *= power;
     }
     return negative ? value / result : value * result;
diff --git a/perl.h b/perl.h
index b85b88f..8269448 100644
--- a/perl.h
+++ b/perl.h
@@ -1754,10 +1754,12 @@ typedef struct ptr_tbl PTR_TBL_t;
 #      include <floatingpoint.h>
 #    endif
 #    define PERL_FPU_INIT fpsetmask(0);
-#  elif PERL_IGNORE_FPUSIG
-#    define PERL_FPU_INIT signal(PERL_IGNORE_FPUSIG, SIG_IGN);
 #  else
-#    define PERL_FPU_INIT
+#    if defined(SIGFPE) && defined(SIG_IGN)
+#      define PERL_FPU_INIT signal(SIGFPE, SIG_IGN);
+#    else
+#      define PERL_FPU_INIT
+#    endif
 #  endif
 #endif