Planet SBCL is a meta blog that collects the contents of various SBCL-related blogs. It was inspired by Planet Lisp.
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Typos in arm64/float.lisp
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arm64: fix a potential issue with fast-ash-c/signed=>signed
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arm64: use the right register in ash-inverted
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x86-64: fix mask-signed-field-integer for 64 and any-reg result
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Address a FIXME in emit-inline-add-sub
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let-lvar-dest: ignore NIL lvars
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| Affects | Status | Importance | Assigned to | Bug watch | |
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sbcl | Fix Released | Undecided | - | |
Transform floor/ceiling to truncate when used as a divisibility test
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Implement choice of using fastrem in IR1 transform
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x86-64/truncate-c: correctly determine if the quotient is unused
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sbcl | Fix Released | Undecided | - | |
Defensively code in type-width-in-bits
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| Affects | Status | Importance | Assigned to | Bug watch | |
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sbcl | New | Undecided | - | |
check-type: don't include ctypes in the expansion
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| Affects | Status | Importance | Assigned to | Bug watch | |
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sbcl | Fix Committed | Undecided | - | |
x86-64: TRUNCATE using the Lemire, Kaser, Kurz transform
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Don't forget NIL
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Show raw constants of :DWORD or :QWORD size
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arm64: fix undefined restarts for call-symbol
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| Affects | Status | Importance | Assigned to | Bug watch | |
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sbcl | New | Undecided | - | |
| Affects | Status | Importance | Assigned to | Bug watch | |
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sbcl | Invalid | Undecided | - | |
Warn about bad subseq ranges after transforming (concatenate .. (subseq ..))
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Accept immediate sc in symbol-global-value
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Remove a redundant check from unparse-physical-enough
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Don't lose :character-set when changing pathname case
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(setf readtable-base-char-preference): assert-not-standard-readtable
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Undo a couple lines of prior change
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Permute FDEFN slots for #+linkage-space
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alloc-buffer: check the type of size once
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Last updated: April 21, 2026 12:15 AM
