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Add work-around for broken sys:int32 arithmetics on 64-bit LispWorks.

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This change fixes deviations on 64-bit implementations of LispWorks,
where sys:int32 arithmetic is not performed modulo 2^32, but rather
overflows to 64-bit values, yielding wrong results.
This commit is contained in:
Pierre R. Mai
2013-03-01 00:12:47 +01:00
parent 2b1577568c
commit 8efec74213
1 changed files with 17 additions and 5 deletions
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22
md5.lisp Normal file → Executable file
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@ -163,8 +163,11 @@ where a is the intended low-order byte and d the high-order byte."
(optimize (speed 3) (safety 0) (space 0) (debug 0) #+lw-int32 (float 0)))
#+cmu
(kernel:32bit-logical-xor y (kernel:32bit-logical-orc2 x z))
#+lw-int32
#+(and :lw-int32 (not :lispworks-64bit))
(sys:int32-logxor y (sys:int32-logorc2 x z))
#+(and :lw-int32 :lispworks-64bit)
(sys:int32-logand #.(sys:int32-1+ (sys:int32<< (sys:integer-to-int32 #x7FFFFFFF) 1))
(sys:int32-logxor y (sys:int32-logorc2 x z)))
#-(or :cmu :lw-int32)
(ldb (byte 32 0) (logxor y (logorc2 x z))))
@ -173,8 +176,13 @@ where a is the intended low-order byte and d the high-order byte."
(defun mod32+ (a b)
(declare (type ub32 a b)
(optimize (speed 3) (safety 0) (space 0) (debug 0) #+lw-int32 (float 0)))
#+lw-int32 (sys:int32+ a b)
#-lw-int32 (ldb (byte 32 0) (+ a b)))
#+(and :lw-int32 (not :lispworks-64bit))
(sys:int32+ a b)
#+(and :lw-int32 :lispworks-64bit)
(sys:int32-logand #.(sys:int32-1+ (sys:int32<< (sys:integer-to-int32 #x7FFFFFFF) 1))
(sys:int32+ a b))
#-lw-int32
(ldb (byte 32 0) (+ a b)))
#+cmu
(define-compiler-macro mod32+ (a b)
@ -208,8 +216,12 @@ where a is the intended low-order byte and d the high-order byte."
(ash a (- s 32)))
#+sbcl
(sb-rotate-byte:rotate-byte s (byte 32 0) a)
#+lw-int32
#+(and :lw-int32 (not :lispworks-64bit))
(sys:int32-logior (sys:int32<< a s) (int32>>logical a (- 32 s)))
#+(and :lw-int32 :lispworks-64bit)
(sys:int32-logior (sys:int32-logand #.(sys:int32-1+ (sys:int32<< (sys:integer-to-int32 #x7FFFFFFF) 1))
(sys:int32<< a s))
(int32>>logical a (- 32 s)))
#-(or :cmu :sbcl :lw-int32)
(logior (ldb (byte 32 0) (ash a s)) (ash a (- s 32))))
@ -428,7 +440,7 @@ in `regs'. Returns a (simple-array (unsigned-byte 8) (16))."
(declare (type (simple-array (unsigned-byte 8) (16)) result))
(macrolet ((frob (reg offset)
(let ((var (gensym)))
`(let ((,var #+lw-int32 (sys:int32-to-integer ,reg)
`(let ((,var #+lw-int32 (ldb (byte 32 0) (sys:int32-to-integer ,reg))
#-lw-int32 ,reg))
(declare (type (unsigned-byte 32) ,var))
(setf