[project @ 2001-07-13 11:03:47 by rrt]

Move 64-bit arithmetic support into std_cbits; there's no reason for it to
be in the RTS.

1 files changed, 89 insertions, 0 deletions

diff --git a/ghc/lib/std/cbits/longlong.c b/ghc/lib/std/cbits/longlong.c
new file mode 100644
index 0000000000..6578504d69
--- /dev/null
+++ b/ghc/lib/std/cbits/longlong.c
@@ -0,0 +1,89 @@
+/* -----------------------------------------------------------------------------
+ * $Id: longlong.c,v 1.1 2001/07/13 11:03:47 rrt Exp $
+ *
+ * (c) The GHC Team, 1998-1999
+ *
+ * Primitive operations over (64-bit) long longs
+ * (only used on 32-bit platforms.)
+ *
+ * ---------------------------------------------------------------------------*/
+
+
+/*
+Miscellaneous primitive operations on StgInt64 and StgWord64s.
+N.B. These are not primops!
+
+Instead of going the normal (boring) route of making the list
+of primitive operations even longer to cope with operations
+over 64-bit entities, we implement them instead 'out-of-line'.
+
+The primitive ops get their own routine (in C) that implements
+the operation, requiring the caller to _ccall_ out. This has
+performance implications of course, but we currently don't
+expect intensive use of either Int64 or Word64 types.
+
+The exceptions to the rule are primops that cast to and from
+64-bit entities (these are defined in PrimOps.h)
+*/
+
+#include "Stg.h"
+
+#ifdef SUPPORT_LONG_LONGS
+
+/* Relational operators */
+
+StgBool gtWord64 (StgWord64 a, StgWord64 b) {return a >  b;}
+StgBool geWord64 (StgWord64 a, StgWord64 b) {return a >= b;}
+StgBool eqWord64 (StgWord64 a, StgWord64 b) {return a == b;}
+StgBool neWord64 (StgWord64 a, StgWord64 b) {return a != b;}
+StgBool ltWord64 (StgWord64 a, StgWord64 b) {return a <  b;}
+StgBool leWord64 (StgWord64 a, StgWord64 b) {return a <= b;}
+
+StgBool gtInt64 (StgInt64 a, StgInt64 b) {return a >  b;}
+StgBool geInt64 (StgInt64 a, StgInt64 b) {return a >= b;}
+StgBool eqInt64 (StgInt64 a, StgInt64 b) {return a == b;}
+StgBool neInt64 (StgInt64 a, StgInt64 b) {return a != b;}
+StgBool ltInt64 (StgInt64 a, StgInt64 b) {return a <  b;}
+StgBool leInt64 (StgInt64 a, StgInt64 b) {return a <= b;}
+
+/* Arithmetic operators */
+
+StgWord64 remWord64  (StgWord64 a, StgWord64 b) {return a % b;}
+StgWord64 quotWord64 (StgWord64 a, StgWord64 b) {return a / b;}
+StgInt64 remInt64    (StgInt64 a, StgInt64 b)   {return a % b;}
+StgInt64 quotInt64   (StgInt64 a, StgInt64 b)   {return a / b;}
+StgInt64 negateInt64 (StgInt64 a)               {return -a;}
+StgInt64 plusInt64   (StgInt64 a, StgInt64 b)   {return a + b;}
+StgInt64 minusInt64  (StgInt64 a, StgInt64 b)   {return a - b;}
+StgInt64 timesInt64  (StgInt64 a, StgInt64 b)   {return a * b;}
+
+/* Logical operators: */
+
+StgWord64 and64      (StgWord64 a, StgWord64 b) {return a & b;}
+StgWord64 or64       (StgWord64 a, StgWord64 b) {return a | b;}
+StgWord64 xor64      (StgWord64 a, StgWord64 b) {return a ^ b;}
+StgWord64 not64      (StgWord64 a)              {return ~a;}
+StgWord64 shiftL64   (StgWord64 a, StgInt b)    {return a << b;}
+StgWord64 shiftRL64  (StgWord64 a, StgInt b)    {return a >> b;}
+/* Right shifting of signed quantities is not portable in C, so
+   the behaviour you'll get from using these primops depends
+   on the whatever your C compiler is doing. ToDo: fix. -- sof 8/98
+*/
+StgInt64  iShiftL64  (StgInt64 a,  StgInt b)    {return a << b;}
+StgInt64  iShiftRA64 (StgInt64 a,  StgInt b)    {return a >> b;}
+StgInt64  iShiftRL64 (StgInt64 a,  StgInt b)
+{return (StgInt64) ((StgWord64) a >> b);}
+
+/* Casting between longs and longer longs:
+   (the primops that cast between Integers and long longs are
+   expressed as macros, since these may cause some heap allocation).
+*/
+
+StgInt64  intToInt64    (StgInt    i) {return (StgInt64)  i;}
+StgInt    int64ToInt    (StgInt64  i) {return (StgInt)    i;}
+StgWord64 int64ToWord64 (StgInt64  i) {return (StgWord64) i;}
+StgWord64 wordToWord64  (StgWord   w) {return (StgWord64) w;}
+StgWord   word64ToWord  (StgWord64 w) {return (StgWord)   w;}
+StgInt64  word64ToInt64 (StgWord64 w) {return (StgInt64)  w;}
+
+#endif /* SUPPORT_LONG_LONGS */