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Micro-optimization: Avoid byte register writes on x86-64 in LOAD-TYPE.
[sbcl.git]
/
contrib
/
sb-rotate-byte
/
x86-64-vm.lisp
diff --git
a/contrib/sb-rotate-byte/x86-64-vm.lisp
b/contrib/sb-rotate-byte/x86-64-vm.lisp
index
d45b596
..
a311933
100644
(file)
--- a/
contrib/sb-rotate-byte/x86-64-vm.lisp
+++ b/
contrib/sb-rotate-byte/x86-64-vm.lisp
@@
-59,7
+59,7
@@
(move result integer)
(if (> count 0)
(inst rol result count)
- (inst ror result count))))
+ (inst ror result (- count)))))
(define-vop (%64bit-rotate-byte)
(:policy :fast-safe)