New in version 2.1.5
* minor incompatible change: on x86-64, the backend instruction
encoders for movzx and for string opcodes have changed their
semantics.
* platform support:
* compatibility: support the latest MinGW on x86. (#1923325,
thanks to Alexis Rivera)
* bug fix: on x86-64, fix instruction encoding for TEST on
RIP-relative addresses. (#1925808, reported by Shinmera on
#sbcl, thanks also to 3b)
* bug fix: on x86-64, loading all-1s into an AVX2 register no
longer causes an error. (thanks to Marco Heisig)
* bug fix: on arm64, improve disassembly of ADD with constant
0 as MOV
* enhancement: on arm64, support debugger commands
RETURN-FROM-FRAME and RESTART-FRAME more efficiently.
* enhancement: on x86-64, add support for vshuf* AVX2
instructions. (reported by Bela Pecsek)
* optimization: faster function calls on arm64.
* optimization: (SETF SBIT) is faster on x86-64.
* bug fix: INTEGER-DECODE-FLOAT was computing the wrong answer for
denormal double floats. (#1926383, reported by Stavros Macrakis)
* bug fix: RANDOM on a floating point argument now does not
cons. (reported by Tito Latini)
* bug fix: fix a compiler crash in type derivation of
LOGTEST. (#1928243)
* bug fix: fix a compiler failure when a declared function type
contains a literal structure with a valid MAKE-LOAD-FORM
method. (#1929160, thanks to Yurii Hryhorenko)
* optimization: FBOUNDP on a constant symbol is now faster.
* optimization: file compilation now produces smaller fasls for
files which reference package literals.
* optimization: derive the type of calls to FLOAT-SIGN.
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