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Draft NEWS for sbcl-2.6.2

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Christophe Rhodes 2026-02-26 15:32:56 +00:00
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52
NEWS
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@ -1,7 +1,57 @@
;;;; -*- coding: utf-8; fill-column: 78 -*-
changes relative to sbcl-2.6.1:
* minor incompatible change: IMAGPART of a negative float returns 0.0, not
-0.0, consistent with a treatment of reals as complexes with an imaginary
part of strictly 0.0, but strictly incompatible with the requirement that
the IMAGPART equal (* 0 <float>)
* platform support:
** ported to Windows on arm64 (thanks to Masatoshi SANO)
** support for Windows on arm64 has been added. (thanks to Masatoshi SANO)
** various mismatches and bugs related to mismatches between Win32 and
Unix have been addressed.
** fixed an issue in unsigned 32-bit compare-and-swap on RISC-V (thanks to
Andreas Schwab) and LoongArch.
** fixed the integration of the system with the (lack of) floating point
traps on RISC-V. (thanks to Andreas Schwab)
** implemented the missing runtime breakpoint-related functions on RISC-V.
(lp#2130944)
** fix for assembling large relative jumps on MIPS.
** fix for GC safety of function calling on RISC-V and LoongArch.
(reported by Will Sinatra)
** support little-endian PPC64 to write cores in ELF format.
** fix for SB-POSIX:STAT on Windows with the UCRT C library.
** numerous other fixes related to architecture definitions, particularly
on RISC-V, but also on LoongArch, MIPS, PPC and PPC64, and ARM64.
* enhancement: support stack allocation of results for struct return values
from alien functions. (thanks to Jesse Bouwman)
* bug fix: rounding of floats converted from ratios. (lp#2139007)
* bug fix: SCALE-FLOAT and RATIONALIZE on denormals gave wrong answers, and
converting ratios to denormals is both more correct and faster.
* bug fix: the ~E FORMAT directive scales its float more correctly.
(lp#1854151, lp#2016431, lp#2125287, reported by Michał "phoe" Herda,
Robert Dodier and Francis Wright)
* bug fix: the error when failing to bind in DESTRUCTURING-BIND is now a
PROGRAM-ERROR.
* bug fix: the compiler respects INLINE and NOTINLINE declarations to
control compiler macros that apply to macros. (lp#1490345)
* bug fix: converting bignums to float will trap or return floating point
infinities as appropriate to the prevailing floating point modes.
* bug fix: division with a (COMPLEX FLOAT) result will be more consistent
with results involving negative zeros.
* bug fix: allow the full range of hash values in weak hash-tables with
user-defined hash functions. (lp#2141482, reported by Patrick Poitras)
* bug fix: malformed OPTIMIZE declarations no longer cause the compiler to
stop.
* bug fix: symbols with terminating macro characters in their names (or
non-terminating ones at the start) print with escapes when *PRINT-ESCAPE*
is true.
* bug fix: documentation issues, in README and the manual. (thanks to Carl
Gay)
* bug fix: compiler crash while transforming arithmetic operations on known
non-numeric inputs. (lp#2142297)
* optimization: avoid consing when right-shifting a bignum gives a fixnum
result.
* optimization: various type tests in the presence of intersecting
constraints do less redundant work.
changes in sbcl-2.6.1 relative to sbcl-2.6.0:
* minor incompatible change: the never-documented :NO-CONSTRUCTOR-DEFUN