qemu-e2k/target/mips/tcg/octeon.decode
Pavel Dovgalyuk dadd071a9c target/mips: implement Octeon-specific arithmetic instructions
This patch implements several Octeon-specific instructions:
- BADDU
- DMUL
- EXTS/EXTS32
- CINS/CINS32
- POP/DPOP
- SEQ/SEQI
- SNE/SNEI

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <165572673245.167724.17377788816335619000.stgit@pasha-ThinkPad-X280>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2022-07-12 22:30:19 +02:00

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# Octeon Architecture Module instruction set
#
# Copyright (C) 2022 Pavel Dovgalyuk
#
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# Branch on bit set or clear
# BBIT0 110010 ..... ..... ................
# BBIT032 110110 ..... ..... ................
# BBIT1 111010 ..... ..... ................
# BBIT132 111110 ..... ..... ................
%bbit_p 28:1 16:5
BBIT 11 set:1 . 10 rs:5 ..... offset:16 p=%bbit_p
# Arithmetic
# BADDU rd, rs, rt
# DMUL rd, rs, rt
# EXTS rt, rs, p, lenm1
# EXTS32 rt, rs, p, lenm1
# CINS rt, rs, p, lenm1
# CINS32 rt, rs, p, lenm1
# DPOP rd, rs
# POP rd, rs
# SEQ rd, rs, rt
# SEQI rt, rs, immediate
# SNE rd, rs, rt
# SNEI rt, rs, immediate
@r3 ...... rs:5 rt:5 rd:5 ..... ......
%bitfield_p 0:1 6:5
@bitfield ...... rs:5 rt:5 lenm1:5 ..... ..... . p=%bitfield_p
BADDU 011100 ..... ..... ..... 00000 101000 @r3
DMUL 011100 ..... ..... ..... 00000 000011 @r3
EXTS 011100 ..... ..... ..... ..... 11101 . @bitfield
CINS 011100 ..... ..... ..... ..... 11001 . @bitfield
POP 011100 rs:5 00000 rd:5 00000 10110 dw:1
SEQNE 011100 rs:5 rt:5 rd:5 00000 10101 ne:1
SEQNEI 011100 rs:5 rt:5 imm:s10 10111 ne:1