Cray J90 fixes for long ints.
This was a convenient excuse to create the pyport.h file recently
discussed!
Please use new Py_ARITHMETIC_RIGHT_SHIFT when right-shifting a
signed int and you *need* sign-extension. This is #define'd in
pyport.h, keying off new config symbol SIGNED_RIGHT_SHIFT_ZERO_FILLS.
If you're running on a platform that needs that symbol #define'd,
the std tests never would have worked for you (in particular,
at least test_long would have failed).
The autoconfig stuff got added to Python after my Unix days, so
I don't know how that works. Would someone please look into doing
& testing an auto-config of the SIGNED_RIGHT_SHIFT_ZERO_FILLS
symbol? It needs to be defined if & only if, e.g., (-1) >> 3 is
not -1.
diff --git a/Include/longintrepr.h b/Include/longintrepr.h
index 4ddbd06..fed01ed 100644
--- a/Include/longintrepr.h
+++ b/Include/longintrepr.h
@@ -18,7 +18,7 @@
/* Parameters of the long integer representation.
These shouldn't have to be changed as C should guarantee that a short
- contains at least 16 bits, but it's made changeable any way.
+ contains at least 16 bits, but it's made changeable anyway.
Note: 'digit' should be able to hold 2*MASK+1, and 'twodigits'
should be able to hold the intermediate results in 'mul'
(at most MASK << SHIFT).
@@ -28,8 +28,9 @@
typedef unsigned short digit;
typedef unsigned int wdigit; /* digit widened to parameter size */
-typedef unsigned long twodigits;
-typedef long stwodigits; /* signed variant of twodigits */
+#define BASE_TWODIGITS_TYPE long
+typedef unsigned BASE_TWODIGITS_TYPE twodigits;
+typedef BASE_TWODIGITS_TYPE stwodigits; /* signed variant of twodigits */
#define SHIFT 15
#define BASE ((digit)1 << SHIFT)