target/mips: Introduce decodetree helpers for MSA LSA/DLSA opcodes

Add the LSA opcode to the MSA32 decodetree config, add DLSA
to a new config for the MSA64 ASE, and call decode_msa64()
in the main decode_opc() loop.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201215225757.764263-23-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-12-08 18:59:36 +01:00
parent a685f7d075
commit 5f21f30d85
4 changed files with 37 additions and 0 deletions

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@ -1,5 +1,6 @@
gen = [
decodetree.process('msa32.decode', extra_args: '--static-decode=decode_msa32'),
decodetree.process('msa64.decode', extra_args: '--static-decode=decode_msa64'),
]
mips_ss = ss.source_set()

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@ -10,11 +10,16 @@
# (Document Number: MD00866-2B-MSA32-AFP-01.12)
#
&rtype rs rt rd sa
&msa_bz df wt s16
@lsa ...... rs:5 rt:5 rd:5 ... sa:2 ...... &rtype
@bz ...... ... .. wt:5 s16:16 &msa_bz df=3
@bz_df ...... ... df:2 wt:5 s16:16 &msa_bz
LSA 000000 ..... ..... ..... 000 .. 000101 @lsa
BZ_V 010001 01011 ..... ................ @bz
BNZ_V 010001 01111 ..... ................ @bz

17
target/mips/msa64.decode Normal file
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@ -0,0 +1,17 @@
# MIPS SIMD Architecture Module instruction set
#
# Copyright (C) 2020 Philippe Mathieu-Daudé
#
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# Reference:
# MIPS Architecture for Programmers Volume IV-j
# The MIPS64 SIMD Architecture Module, Revision 1.12
# (Document Number: MD00868-1D-MSA64-AFP-01.12)
#
&rtype rs rt rd sa !extern
@lsa ...... rs:5 rt:5 rd:5 ... sa:2 ...... &rtype
DLSA 000000 ..... ..... ..... 000 .. 010101 @lsa

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@ -19,6 +19,7 @@
/* Include the auto-generated decoder. */
#include "decode-msa32.c.inc"
#include "decode-msa64.c.inc"
#define OPC_MSA (0x1E << 26)
@ -2266,7 +2267,20 @@ static bool trans_MSA(DisasContext *ctx, arg_MSA *a)
return true;
}
static bool trans_LSA(DisasContext *ctx, arg_rtype *a)
{
return gen_lsa(ctx, a->rd, a->rt, a->rs, a->sa);
}
static bool trans_DLSA(DisasContext *ctx, arg_rtype *a)
{
return gen_dlsa(ctx, a->rd, a->rt, a->rs, a->sa);
}
bool decode_ase_msa(DisasContext *ctx, uint32_t insn)
{
if (TARGET_LONG_BITS == 64 && decode_msa64(ctx, insn)) {
return true;
}
return decode_msa32(ctx, insn);
}