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From da3b331c63a6aec0ec3206b1d9ca0df9bced3338 Mon Sep 17 00:00:00 2001
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From: Andreas Arnez <arnez@linux.ibm.com>
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Date: Mon, 3 Jan 2022 18:15:05 +0100
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Subject: [PATCH] s390: Fix VFLRX and WFLRX instructions
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Due to a typo in s390_irgen_VFLR, the VFLR instruction behaves incorrectly
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when its m3 field contains 4, meaning extended format. In that case VFLR
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is also written as VFLRX (or WFLRX) and supposed to round down from the
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extended 128-bit format to the long 64-bit format. However, the typo
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checks for m3 == 2 instead, so the value of 4 is unhandled, causing
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Valgrind to throw a specification exception.
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This fixes the typo.
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---
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VEX/priv/guest_s390_toIR.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/VEX/priv/guest_s390_toIR.c b/VEX/priv/guest_s390_toIR.c
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index fffc563d4..3ef104fcd 100644
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--- a/VEX/priv/guest_s390_toIR.c
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+++ b/VEX/priv/guest_s390_toIR.c
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@@ -19008,7 +19008,7 @@ s390_irgen_VFLL(UChar v1, UChar v2, UChar m3, UChar m4, UChar m5)
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static const HChar *
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s390_irgen_VFLR(UChar v1, UChar v2, UChar m3, UChar m4, UChar m5)
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{
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- s390_insn_assert("vflr", m3 == 3 || (s390_host_has_vxe && m3 == 2));
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+ s390_insn_assert("vflr", m3 == 3 || (s390_host_has_vxe && m3 == 4));
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if (m3 == 3)
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s390_vector_fp_convert(Iop_F64toF32, Ity_F64, Ity_F32, True,
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--
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2.31.1
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