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emit-evex: fix encoding of high zmm registers

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Stas Boukarev 2026-06-27 23:54:34 +03:00
parent 36fceec808
commit db2b204bb1
1 changed files with 1 additions and 1 deletions
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2
src/compiler/x86-64/avx2-insts.lisp
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@ -436,7 +436,7 @@
(evex-encode-mm opcode-prefix))
;; P2: W vvvv 1 pp
(logior (ash w 7)
(ash (logxor vvvv #b1111) 3)
(ash (logandc1 vvvv #b1111) 3)
#b100 ; bit 2 always 1
(vex-encode-pp pp))
;; P3: z L'L b V' aaa