a736cbc303
The encoding of size = 2 and size = 3 had the incorrect decode for align, overlapping the stride field. This error was hidden by what should have been unnecessary masking in translate. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210419202257.161730-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
53 lines
2.0 KiB
Plaintext
53 lines
2.0 KiB
Plaintext
# AArch32 Neon load/store instruction descriptions
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#
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# Copyright (c) 2020 Linaro, Ltd
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, see <http://www.gnu.org/licenses/>.
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#
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# This file is processed by scripts/decodetree.py
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#
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# Encodings for Neon load/store instructions where the T32 encoding
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# is a simple transformation of the A32 encoding.
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# More specifically, this file covers instructions where the A32 encoding is
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# 0b1111_0100_xxx0_xxxx_xxxx_xxxx_xxxx_xxxx
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# and the T32 encoding is
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# 0b1111_1001_xxx0_xxxx_xxxx_xxxx_xxxx_xxxx
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# This file works on the A32 encoding only; calling code for T32 has to
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# transform the insn into the A32 version first.
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%vd_dp 22:1 12:4
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# Neon load/store multiple structures
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VLDST_multiple 1111 0100 0 . l:1 0 rn:4 .... itype:4 size:2 align:2 rm:4 \
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vd=%vd_dp
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# Neon load single element to all lanes
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VLD_all_lanes 1111 0100 1 . 1 0 rn:4 .... 11 n:2 size:2 t:1 a:1 rm:4 \
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vd=%vd_dp
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# Neon load/store single structure to one lane
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%imm1_5_p1 5:1 !function=plus1
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%imm1_6_p1 6:1 !function=plus1
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VLDST_single 1111 0100 1 . l:1 0 rn:4 .... 00 n:2 reg_idx:3 align:1 rm:4 \
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vd=%vd_dp size=0 stride=1
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VLDST_single 1111 0100 1 . l:1 0 rn:4 .... 01 n:2 reg_idx:2 . align:1 rm:4 \
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vd=%vd_dp size=1 stride=%imm1_5_p1
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VLDST_single 1111 0100 1 . l:1 0 rn:4 .... 10 n:2 reg_idx:1 . align:2 rm:4 \
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vd=%vd_dp size=2 stride=%imm1_6_p1
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