Unapply an experimental patch that accidentally escaped

from the lab by piggybacking with the change #3955.

p4raw-link: @3955 on //depot/cfgperl: d28f7c377ae191ca53d9157f124642cf323614a0

p4raw-id: //depot/cfgperl@3957

1 files changed, 61 insertions, 38 deletions

diff --git a/pp.c b/pp.c
index 3cc975921d..8a0f0f7131 100644
--- a/pp.c
+++ b/pp.c
@@ -28,6 +28,37 @@ static double UV_MAX_cxux = ((double)UV_MAX);
 #endif
 
 /*
+ * Types used in bitwise operations.
+ *
+ * Normally we'd just use IV and UV.  However, some hardware and
+ * software combinations (e.g. Alpha and current OSF/1) don't have a
+ * floating-point type to use for NV that has adequate bits to fully
+ * hold an IV/UV.  (In other words, sizeof(long) == sizeof(double).)
+ *
+ * It just so happens that "int" is the right size almost everywhere.
+ */
+typedef int IBW;
+typedef unsigned UBW;
+
+/*
+ * Mask used after bitwise operations.
+ *
+ * There is at least one realm (Cray word machines) that doesn't
+ * have an integral type (except char) small enough to be represented
+ * in a double without loss; that is, it has no 32-bit type.
+ */
+#if LONGSIZE > 4  && defined(_CRAY) && !defined(_CRAYMPP)
+#  define BW_BITS  32
+#  define BW_MASK  ((1 << BW_BITS) - 1)
+#  define BW_SIGN  (1 << (BW_BITS - 1))
+#  define BWi(i)  (((i) & BW_SIGN) ? ((i) | ~BW_MASK) : ((i) & BW_MASK))
+#  define BWu(u)  ((u) & BW_MASK)
+#else
+#  define BWi(i)  (i)
+#  define BWu(u)  (u)
+#endif
+
+/*
  * Offset for integer pack/unpack.
  *
  * On architectures where I16 and I32 aren't really 16 and 32 bits,
@@ -900,7 +931,6 @@ PP(pp_pow)
 PP(pp_multiply)
 {
     djSP; dATARGET; tryAMAGICbin(mult,opASSIGN);
-    tryIVIVbin(*);
     {
       dPOPTOPnnrl;
       SETn( left * right );
@@ -911,16 +941,6 @@ PP(pp_multiply)
 PP(pp_divide)
 {
     djSP; dATARGET; tryAMAGICbin(div,opASSIGN);
-    if (TOPIOKbin) {
-      dPOPTOPiirl_ul;
-      if (right == 0)
-	DIE(aTHX_ "Illegal division by zero");
-      if ((left % right) && !(PL_op->op_private & HINT_INTEGER))
-	SETn( (NV)left / (NV)right );
-      else
-	SETi( left / right );
-      RETURN;
-    }
     {
       dPOPPOPnnrl;
       NV value;
@@ -1100,7 +1120,6 @@ PP(pp_repeat)
 PP(pp_subtract)
 {
     djSP; dATARGET; tryAMAGICbin(subtr,opASSIGN);
-    tryIVIVbin(-);
     {
       dPOPTOPnnrl_ul;
       SETn( left - right );
@@ -1112,14 +1131,16 @@ PP(pp_left_shift)
 {
     djSP; dATARGET; tryAMAGICbin(lshift,opASSIGN);
     {
-      IV shift = POPi;
+      IBW shift = POPi;
       if (PL_op->op_private & HINT_INTEGER) {
-	IV i = TOPi;
-	SETi(i << shift);
+	IBW i = TOPi;
+	i = BWi(i) << shift;
+	SETi(BWi(i));
       }
       else {
-	UV u = TOPu;
-	SETu(u << shift);
+	UBW u = TOPu;
+	u <<= shift;
+	SETu(BWu(u));
       }
       RETURN;
     }
@@ -1129,14 +1150,16 @@ PP(pp_right_shift)
 {
     djSP; dATARGET; tryAMAGICbin(rshift,opASSIGN);
     {
-      IV shift = POPi;
+      IBW shift = POPi;
       if (PL_op->op_private & HINT_INTEGER) {
-	IV i = TOPi;
-	SETi(i >> shift);
+	IBW i = TOPi;
+	i = BWi(i) >> shift;
+	SETi(BWi(i));
       }
       else {
-	UV u = TOPu;
-	SETu(u >> shift);
+	UBW u = TOPu;
+	u >>= shift;
+	SETu(BWu(u));
       }
       RETURN;
     }
@@ -1306,12 +1329,12 @@ PP(pp_bit_and)
       dPOPTOPssrl;
       if (SvNIOKp(left) || SvNIOKp(right)) {
 	if (PL_op->op_private & HINT_INTEGER) {
-	  IV value = SvIV(left) & SvIV(right);
-	  SETi(value);
+	  IBW value = SvIV(left) & SvIV(right);
+	  SETi(BWi(value));
 	}
 	else {
-	  UV value = SvUV(left) & SvUV(right);
-	  SETu(value);
+	  UBW value = SvUV(left) & SvUV(right);
+	  SETu(BWu(value));
 	}
       }
       else {
@@ -1329,12 +1352,12 @@ PP(pp_bit_xor)
       dPOPTOPssrl;
       if (SvNIOKp(left) || SvNIOKp(right)) {
 	if (PL_op->op_private & HINT_INTEGER) {
-	  IV value = (USE_LEFT(left) ? SvIV(left) : 0) ^ SvIV(right);
-	  SETi(value);
+	  IBW value = (USE_LEFT(left) ? SvIV(left) : 0) ^ SvIV(right);
+	  SETi(BWi(value));
 	}
 	else {
-	  UV value = (USE_LEFT(left) ? SvUV(left) : 0) ^ SvUV(right);
-	  SETu(value);
+	  UBW value = (USE_LEFT(left) ? SvUV(left) : 0) ^ SvUV(right);
+	  SETu(BWu(value));
 	}
       }
       else {
@@ -1352,12 +1375,12 @@ PP(pp_bit_or)
       dPOPTOPssrl;
       if (SvNIOKp(left) || SvNIOKp(right)) {
 	if (PL_op->op_private & HINT_INTEGER) {
-	  IV value = (USE_LEFT(left) ? SvIV(left) : 0) | SvIV(right);
-	  SETi(value);
+	  IBW value = (USE_LEFT(left) ? SvIV(left) : 0) | SvIV(right);
+	  SETi(BWi(value));
 	}
 	else {
-	  UV value = (USE_LEFT(left) ? SvUV(left) : 0) | SvUV(right);
-	  SETu(value);
+	  UBW value = (USE_LEFT(left) ? SvUV(left) : 0) | SvUV(right);
+	  SETu(BWu(value));
 	}
       }
       else {
@@ -1418,12 +1441,12 @@ PP(pp_complement)
       dTOPss;
       if (SvNIOKp(sv)) {
 	if (PL_op->op_private & HINT_INTEGER) {
-	  IV value = ~SvIV(sv);
-	  SETi(value);
+	  IBW value = ~SvIV(sv);
+	  SETi(BWi(value));
 	}
 	else {
-	  UV value = ~SvUV(sv);
-	  SETu(value);
+	  UBW value = ~SvUV(sv);
+	  SETu(BWu(value));
 	}
       }
       else {