From e61d22efbb00a7fa2de05bf2c594ec3b6f671baf Mon Sep 17 00:00:00 2001
From: Nicholas Clark <nick@ccl4.org>
Date: Tue, 20 Nov 2001 21:59:51 +0000
Subject: [PATCH] spaceship and refs Message-ID:
 <20011120215951.U62891@plum.flirble.org>

p4raw-id: //depot/perl@13147
---
 pp.c       |  7 +++++--
 pp_hot.c   |  3 ++-
 t/op/cmp.t | 43 +++++++++++++++++++++++++++++++++++--------
 3 files changed, 42 insertions(+), 11 deletions(-)

diff --git a/pp.c b/pp.c
index 9407fd4..e4354ea 100644
--- a/pp.c
+++ b/pp.c
@@ -1759,7 +1759,8 @@ PP(pp_ne)
     dSP; tryAMAGICbinSET(ne,0);
 #ifndef NV_PRESERVES_UV
     if (SvROK(TOPs) && SvROK(TOPm1s)) {
-	SETs(boolSV(SvRV(TOPs) != SvRV(TOPm1s)));
+        SP--;
+	SETs(boolSV(SvRV(TOPs) != SvRV(TOPp1s)));
 	RETURN;
     }
 #endif
@@ -1830,7 +1831,9 @@ PP(pp_ncmp)
     dSP; dTARGET; tryAMAGICbin(ncmp,0);
 #ifndef NV_PRESERVES_UV
     if (SvROK(TOPs) && SvROK(TOPm1s)) {
-	SETi(PTR2UV(SvRV(TOPs)) - PTR2UV(SvRV(TOPm1s)));
+        UV right = PTR2UV(SvRV(POPs));
+        UV left = PTR2UV(SvRV(TOPs));
+	SETi((left > right) - (left < right));
 	RETURN;
     }
 #endif
diff --git a/pp_hot.c b/pp_hot.c
index be94e10..8781b6c 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -237,7 +237,8 @@ PP(pp_eq)
     dSP; tryAMAGICbinSET(eq,0);
 #ifndef NV_PRESERVES_UV
     if (SvROK(TOPs) && SvROK(TOPm1s)) {
-	SETs(boolSV(SvRV(TOPs) == SvRV(TOPm1s)));
+        SP--;
+	SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
 	RETURN;
     }
 #endif
diff --git a/t/op/cmp.t b/t/op/cmp.t
index c6d72f1..1eca8ab 100755
--- a/t/op/cmp.t
+++ b/t/op/cmp.t
@@ -28,13 +28,15 @@ $iv_min = $iv_max;
 my $uv_bigi = $iv_big;
 $uv_bigi |= 0x0;
 
+my @array = qw(perl rules);
+
 # Seems one needs to perform the maths on 'Inf' to get the NV correctly primed.
 @FOO = ('s', 'N/A', 'a', 'NaN', -1, undef, 0, 1, 3.14, 1e37, 0.632120558, -.5,
 	'Inf'+1, '-Inf'-1, 0x0, 0x1, 0x5, 0xFFFFFFFF, $uv_max, $uv_maxm1,
 	$uv_big, $uv_bigi, $iv0, $iv1, $ivm1, $iv_min, $iv_max, $iv_big,
-	$iv_small);
+	$iv_small, \$array[0], \$array[0], \$array[1], \$^X);
 
-$expect = 6 * ($#FOO+2) * ($#FOO+1);
+$expect = 7 * ($#FOO+2) * ($#FOO+1);
 print "1..$expect\n";
 
 sub nok ($$$$$$$$) {
@@ -50,14 +52,14 @@ for my $i (0..$#FOO) {
 	# Comparison routines may convert these internally, which would change
 	# what is used to determine the comparison on later runs. Hence copy
 	my ($i1, $i2, $i3, $i4, $i5, $i6, $i7, $i8, $i9, $i10,
-	    $i11, $i12, $i13, $i14, $i15) =
-	  ($FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i],
-	   $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i],
+	    $i11, $i12, $i13, $i14, $i15, $i16, $i17) =
+	  ($FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i],
+	   $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i],
 	   $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i], $FOO[$i]);
 	my ($j1, $j2, $j3, $j4, $j5, $j6, $j7, $j8, $j9, $j10,
-	    $j11, $j12, $j13, $j14, $j15) =
-	  ($FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j],
-	   $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j],
+	    $j11, $j12, $j13, $j14, $j15, $j16, $j17) =
+	  ($FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j],
+	   $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j],
 	   $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j], $FOO[$j]);
 	my $cmp = $i1 <=> $j1;
 	if (!defined($cmp) ? !($i2 < $j2)
@@ -127,6 +129,20 @@ for my $i (0..$#FOO) {
 	    nok ($ok, $i3, '<=>', $j3, $cmp, $i, $j, '<=');
 	}
 	$ok++;
+        my $pmc =  $j16 <=> $i16; # cmp it in reverse
+        # Should give -ve of other answer, or undef for NaNs
+        # a + -a should be zero. not zero is truth. which avoids using ==
+	if (defined($cmp) ? !($cmp + $pmc) : !defined $pmc)
+	{
+	    print "ok $ok\n";
+	}
+	else {
+	    nok ($ok, $i3, '<=>', $j3, $cmp, $i, $j, '<=> transposed');
+	}
+
+
+	# String comparisons
+	$ok++;
 	$cmp = $i9 cmp $j9;
 	if ($cmp == -1 && $i10 lt $j10 ||
 	    $cmp == 0  && !($i10 lt $j10) ||
@@ -187,5 +203,16 @@ for my $i (0..$#FOO) {
 	else {
 	    nok ($ok, $i3, 'cmp', $j3, $cmp, $i, $j, 'ge');
 	}
+	$ok++;
+        $pmc =  $j17 cmp $i17; # cmp it in reverse
+        # Should give -ve of other answer
+        # a + -a should be zero. not zero is truth. which avoids using ==
+	if (!($cmp + $pmc))
+	{
+	    print "ok $ok\n";
+	}
+	else {
+	    nok ($ok, $i3, '<=>', $j3, $cmp, $i, $j, 'cmp transposed');
+	}
     }
 }
-- 
2.7.4