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target/arm: Add infrastructure for disas_sme 

This includes the build rules for the decoder, and the
new file for translation, but excludes any instructions.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-07-08 20:44:57 +05:30 committed by Peter Maydell
parent 7a867dd57a
commit e67cd1cac2
5 changed files with 64 additions and 1 deletions
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2
target/arm/meson.build
View File

@ -1,5 +1,6 @@
gen = [
decodetree.process('sve.decode', extra_args: '--decode=disas_sve'),
decodetree.process('sme.decode', extra_args: '--decode=disas_sme'),
decodetree.process('neon-shared.decode', extra_args: '--decode=disas_neon_shared'),
decodetree.process('neon-dp.decode', extra_args: '--decode=disas_neon_dp'),
decodetree.process('neon-ls.decode', extra_args: '--decode=disas_neon_ls'),
@ -50,6 +51,7 @@ arm_ss.add(when: 'TARGET_AARCH64', if_true: files(
'sme_helper.c',
'translate-a64.c',
'translate-sve.c',
'translate-sme.c',
))
arm_softmmu_ss = ss.source_set()

20
target/arm/sme.decode Normal file
View File

@ -0,0 +1,20 @@
# AArch64 SME instruction descriptions
#
# Copyright (c) 2022 Linaro, Ltd
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <http://www.gnu.org/licenses/>.
#
# This file is processed by scripts/decodetree.py
#

7
target/arm/translate-a64.c
View File

@ -14806,7 +14806,12 @@ static void aarch64_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
}
switch (extract32(insn, 25, 4)) {
case 0x0: case 0x1: case 0x3: /* UNALLOCATED */
case 0x0:
if (!extract32(insn, 31, 1) || !disas_sme(s, insn)) {
unallocated_encoding(s);
}
break;
case 0x1: case 0x3: /* UNALLOCATED */
unallocated_encoding(s);
break;
case 0x2:

1
target/arm/translate-a64.h
View File

@ -146,6 +146,7 @@ static inline int pred_gvec_reg_size(DisasContext *s)
}
bool disas_sve(DisasContext *, uint32_t);
bool disas_sme(DisasContext *, uint32_t);
void gen_gvec_rax1(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);

35
target/arm/translate-sme.c Normal file
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@ -0,0 +1,35 @@
/*
* AArch64 SME translation
*
* Copyright (c) 2022 Linaro, Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "tcg/tcg-op.h"
#include "tcg/tcg-op-gvec.h"
#include "tcg/tcg-gvec-desc.h"
#include "translate.h"
#include "exec/helper-gen.h"
#include "translate-a64.h"
#include "fpu/softfloat.h"
/*
* Include the generated decoder.
*/
#include "decode-sme.c.inc"