Planet SBCL

Make character-set unparser more useful when cross-compiling
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Add some failing contification test cases from Fluet and Weeks.
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Micro-optimize READ-STRING
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sb-manual: skip undefined things when building the manual
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Correct the user facing function for vpsubusb instruction
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Encode the remaining bmi1/2 instructions, movbe
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Affects		Status	Importance	Assigned to	Bug watch
	sbcl	Fix Committed	Undecided	-

Affects		Status	Importance	Assigned to	Bug watch
	sbcl	New	Undecided	-

Change #-conset-is-sset to #+bitmapped-conset
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The cerror in cold-fset works fine
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Grow consets more lazily
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Detection redefs in genesis for #+linkage-space
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Micro-optimize GET-OUTPUT-STREAM-STRING
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Micro-optimize %LOOKUP-SYMBOL
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Exclude 0 from fd-stream-element-size
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arm64: try sign-extending when encoding constants for logand
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Better (dpb 0 (byte s 0) x) and (dpb -1 (byte s p) x)
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arm64: use BIC instead of AND if it can load a smaller constant
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arm64: don't translate (dpb x (byte ..) 0) to bfm
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arm64: prefer orr + lsl to bfm
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2.6.7: will be tagged as "sbcl-2.6.7"
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substitute-single-use-lvar: don't avoid casts for multiple uses
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Affects		Status	Importance	Assigned to	Bug watch
	sbcl	Fix Committed	Undecided	-

Don't delete blocks during constraint propagation
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Affects		Status	Importance	Assigned to	Bug watch
	sbcl	Fix Committed	Undecided	-

sb-manual: fix indented code block parsing
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Affects		Status	Importance	Assigned to	Bug watch
	sbcl	New	Undecided	-

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July 29, 2026

SBCL Commits — Make character-set unparser more useful when cross-compiling

SBCL Commits — Add some failing contification test cases from Fluet and Weeks.

SBCL Commits — Micro-optimize READ-STRING

SBCL Commits — sb-manual: skip undefined things when building the manual

SBCL Commits — Correct the user facing function for vpsubusb instruction

SBCL Commits — Clarify a comment

SBCL Commits — Encode the remaining bmi1/2 instructions, movbe

July 28, 2026

Launchpad Bugs — [2162021] Can't build the manual on linux-x86

Launchpad Bugs — [2162019] ppc64le: warm build fails with FLOATING-POINT-INEXACT in STRING->UTF8 after 246af00 ("Don't signal errors for (log qnan)")

SBCL Commits — Change #-conset-is-sset to #+bitmapped-conset

SBCL Commits — The cerror in cold-fset works fine

SBCL Commits — Grow consets more lazily

SBCL Commits — Detection redefs in genesis for #+linkage-space

SBCL Commits — Micro-optimize GET-OUTPUT-STREAM-STRING

SBCL Commits — Micro-optimize %LOOKUP-SYMBOL

SBCL Commits — Exclude 0 from fd-stream-element-size

SBCL Commits — arm64: try sign-extending when encoding constants for logand

SBCL Commits — Better (dpb 0 (byte s 0) x) and (dpb -1 (byte s p) x)

SBCL Commits — arm64: use BIC instead of AND if it can load a smaller constant

SBCL Commits — arm64: don't translate (dpb x (byte ..) 0) to bfm

SBCL Commits — arm64: prefer orr + lsl to bfm

SBCL Commits — 2.6.7: will be tagged as "sbcl-2.6.7"

SBCL Commits — substitute-single-use-lvar: don't avoid casts for multiple uses

Launchpad Bugs — [2161939] The function SB-VM::FASTREM-64 is undefined.

July 25, 2026

SBCL Commits — Don't delete blocks during constraint propagation

Launchpad Bugs — [2161789] Incorrect value computed (let, m-v-b, if, eql)

July 24, 2026

SBCL Commits — sb-manual: fix indented code block parsing

SBCL Commits — Typos

SBCL Commits — more draft NEWS

Launchpad Bugs — [2161700] wanted: Replace multiple bit-wise logical operations with just one