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(parent: 34eac35) | patch
tcg/i386: convert add/sub of 128 to sub/add of -128
authorPaolo Bonzini <pbonzini@redhat.com>
Thu, 28 Dec 2023 12:05:14 +0000 (13:05 +0100)
committerRichard Henderson <richard.henderson@linaro.org>
Wed, 10 Jan 2024 21:46:35 +0000 (08:46 +1100)
commit64708db302edfe57474239a51d4dad4466fac44a
treef4bf5355163a449b09e123d1b98302ab84c5dc67tree | snapshot
parent34eac35f893664eb8545b98142e23d9954722766commit | diff
tcg/i386: convert add/sub of 128 to sub/add of -128

Extend the existing conditional that generates INC/DEC, to also swap an
ADD for a SUB and vice versa when the immediate is 128.  This facilitates
using OPC_ARITH_EvIb instead of OPC_ARITH_EvIz.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20231228120514.70205-1-pbonzini@redhat.com>
[rth: Use a switch on C]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
tcg/i386/tcg-target.c.inc diff | blob | history
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