qemu/target/microblaze/insns.decode

#
# MicroBlaze instruction decode definitions.
#
# Copyright (c) 2020 Richard Henderson <rth@twiddle.net>
#
# 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/>.
#

&typea          rd ra rb
&typeb          rd ra imm

# Include any IMM prefix in the value reported.
%extimm         0:s16 !function=typeb_imm

@typea          ...... rd:5 ra:5 rb:5 ... .... ....     &typea
@typeb          ...... rd:5 ra:5 ................       &typeb imm=%extimm

###

{
  zero          000000 00000 00000 00000 000 0000 0000
  add           000000 ..... ..... ..... 000 0000 0000  @typea
}
addc            000010 ..... ..... ..... 000 0000 0000  @typea
addk            000100 ..... ..... ..... 000 0000 0000  @typea
addkc           000110 ..... ..... ..... 000 0000 0000  @typea

addi            001000 ..... ..... ................     @typeb
addic           001010 ..... ..... ................     @typeb
addik           001100 ..... ..... ................     @typeb
addikc          001110 ..... ..... ................     @typeb

cmp             000101 ..... ..... ..... 000 0000 0001  @typea
cmpu            000101 ..... ..... ..... 000 0000 0011  @typea

rsub            000001 ..... ..... ..... 000 0000 0000  @typea
rsubc           000011 ..... ..... ..... 000 0000 0000  @typea
rsubk           000101 ..... ..... ..... 000 0000 0000  @typea
rsubkc          000111 ..... ..... ..... 000 0000 0000  @typea

rsubi           001001 ..... ..... ................     @typeb
rsubic          001011 ..... ..... ................     @typeb
rsubik          001101 ..... ..... ................     @typeb
rsubikc         001111 ..... ..... ................     @typeb
target/microblaze: Add decodetree infrastructure The new interface is a stub that recognizes no instructions. It falls back to the old decoder for all instructions. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2020-08-17 19:42:44 +03:00			`#`
			`# MicroBlaze instruction decode definitions.`
			`#`
			`# Copyright (c) 2020 Richard Henderson <rth@twiddle.net>`
			`#`
			`# 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/>.`
			`#`
target/microblaze: Convert dec_add to decodetree Adds infrastrucure for translation of instructions, which could not be added before their first use. Cache a temporary which represents r0 as the immediate 0 value, or a sink. Move the special case of opcode_0_illegal from old_decode() into decodetree as well, lest this get interpreted as add. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2020-08-18 08:17:58 +03:00
			`&typea rd ra rb`
			`&typeb rd ra imm`

			`# Include any IMM prefix in the value reported.`
			`%extimm 0:s16 !function=typeb_imm`

			`@typea ...... rd:5 ra:5 rb:5 ... .... .... &typea`
			`@typeb ...... rd:5 ra:5 ................ &typeb imm=%extimm`

			`###`

			`{`
			`zero 000000 00000 00000 00000 000 0000 0000`
			`add 000000 ..... ..... ..... 000 0000 0000 @typea`
			`}`
			`addc 000010 ..... ..... ..... 000 0000 0000 @typea`
			`addk 000100 ..... ..... ..... 000 0000 0000 @typea`
			`addkc 000110 ..... ..... ..... 000 0000 0000 @typea`

			`addi 001000 ..... ..... ................ @typeb`
			`addic 001010 ..... ..... ................ @typeb`
			`addik 001100 ..... ..... ................ @typeb`
			`addikc 001110 ..... ..... ................ @typeb`
target/microblaze: Convert dec_sub to decodetree Use tcg_gen_add2_i32 for computing carry. This removes the last use of helper_carry, so remove that. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2020-08-17 21:29:24 +03:00
			`cmp 000101 ..... ..... ..... 000 0000 0001 @typea`
			`cmpu 000101 ..... ..... ..... 000 0000 0011 @typea`

			`rsub 000001 ..... ..... ..... 000 0000 0000 @typea`
			`rsubc 000011 ..... ..... ..... 000 0000 0000 @typea`
			`rsubk 000101 ..... ..... ..... 000 0000 0000 @typea`
			`rsubkc 000111 ..... ..... ..... 000 0000 0000 @typea`

			`rsubi 001001 ..... ..... ................ @typeb`
			`rsubic 001011 ..... ..... ................ @typeb`
			`rsubik 001101 ..... ..... ................ @typeb`
			`rsubikc 001111 ..... ..... ................ @typeb`