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Additionally, REQUIRE_64BIT when L=1 to match what is specified in The Programming Environments Manual: "For 32-bit implementations, the L field must be cleared, otherwise the instruction form is invalid." Some CPUs are known to deviate from this specification by ignoring the L bit [1]. The stricter behavior, however, can help users that test software with qemu, making it more likely to detect bugs that would otherwise be silent. If deemed necessary, a future patch can adapt this behavior based on the specific CPU model. [1] The 601 manual is the only one I've found that explicitly states that the L bit is ignored, but we also observe this behavior in a 7447A v1.2. Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Message-Id: <20210601193528.2533031-15-matheus.ferst@eldorado.org.br> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> [dwg: Corrected whitespace error] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
127 lines
4.9 KiB
Plaintext
127 lines
4.9 KiB
Plaintext
#
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# Power ISA decode for 32-bit insns (opcode space 0)
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#
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# Copyright (c) 2021 Instituto de Pesquisas Eldorado (eldorado.org.br)
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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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&D rt ra si:int64_t
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@D ...... rt:5 ra:5 si:s16 &D
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&D_bf bf l:bool ra imm
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@D_bfs ...... bf:3 - l:1 ra:5 imm:s16 &D_bf
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@D_bfu ...... bf:3 - l:1 ra:5 imm:16 &D_bf
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%ds_si 2:s14 !function=times_4
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@DS ...... rt:5 ra:5 .............. .. &D si=%ds_si
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&DX rt d
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%dx_d 6:s10 16:5 0:1
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@DX ...... rt:5 ..... .......... ..... . &DX d=%dx_d
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&VX vrt vra vrb
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@VX ...... vrt:5 vra:5 vrb:5 .......... . &VX
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&X rt ra rb
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@X ...... rt:5 ra:5 rb:5 .......... . &X
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&X_bi rt bi
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@X_bi ...... rt:5 bi:5 ----- .......... - &X_bi
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&X_bfl bf l:bool ra rb
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@X_bfl ...... bf:3 - l:1 ra:5 rb:5 ..........- &X_bfl
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### Fixed-Point Load Instructions
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LBZ 100010 ..... ..... ................ @D
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LBZU 100011 ..... ..... ................ @D
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LBZX 011111 ..... ..... ..... 0001010111 - @X
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LBZUX 011111 ..... ..... ..... 0001110111 - @X
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LHZ 101000 ..... ..... ................ @D
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LHZU 101001 ..... ..... ................ @D
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LHZX 011111 ..... ..... ..... 0100010111 - @X
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LHZUX 011111 ..... ..... ..... 0100110111 - @X
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LHA 101010 ..... ..... ................ @D
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LHAU 101011 ..... ..... ................ @D
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LHAX 011111 ..... ..... ..... 0101010111 - @X
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LHAXU 011111 ..... ..... ..... 0101110111 - @X
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LWZ 100000 ..... ..... ................ @D
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LWZU 100001 ..... ..... ................ @D
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LWZX 011111 ..... ..... ..... 0000010111 - @X
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LWZUX 011111 ..... ..... ..... 0000110111 - @X
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LWA 111010 ..... ..... ..............10 @DS
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LWAX 011111 ..... ..... ..... 0101010101 - @X
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LWAUX 011111 ..... ..... ..... 0101110101 - @X
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LD 111010 ..... ..... ..............00 @DS
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LDU 111010 ..... ..... ..............01 @DS
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LDX 011111 ..... ..... ..... 0000010101 - @X
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LDUX 011111 ..... ..... ..... 0000110101 - @X
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### Fixed-Point Store Instructions
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STB 100110 ..... ..... ................ @D
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STBU 100111 ..... ..... ................ @D
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STBX 011111 ..... ..... ..... 0011010111 - @X
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STBUX 011111 ..... ..... ..... 0011110111 - @X
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STH 101100 ..... ..... ................ @D
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STHU 101101 ..... ..... ................ @D
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STHX 011111 ..... ..... ..... 0110010111 - @X
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STHUX 011111 ..... ..... ..... 0110110111 - @X
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STW 100100 ..... ..... ................ @D
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STWU 100101 ..... ..... ................ @D
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STWX 011111 ..... ..... ..... 0010010111 - @X
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STWUX 011111 ..... ..... ..... 0010110111 - @X
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STD 111110 ..... ..... ..............00 @DS
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STDU 111110 ..... ..... ..............01 @DS
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STDX 011111 ..... ..... ..... 0010010101 - @X
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STDUX 011111 ..... ..... ..... 0010110101 - @X
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### Fixed-Point Compare Instructions
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CMP 011111 ... - . ..... ..... 0000000000 - @X_bfl
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CMPL 011111 ... - . ..... ..... 0000100000 - @X_bfl
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CMPI 001011 ... - . ..... ................ @D_bfs
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CMPLI 001010 ... - . ..... ................ @D_bfu
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### Fixed-Point Arithmetic Instructions
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ADDI 001110 ..... ..... ................ @D
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ADDIS 001111 ..... ..... ................ @D
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ADDPCIS 010011 ..... ..... .......... 00010 . @DX
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## Fixed-Point Logical Instructions
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CFUGED 011111 ..... ..... ..... 0011011100 - @X
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### Move To/From System Register Instructions
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SETBC 011111 ..... ..... ----- 0110000000 - @X_bi
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SETBCR 011111 ..... ..... ----- 0110100000 - @X_bi
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SETNBC 011111 ..... ..... ----- 0111000000 - @X_bi
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SETNBCR 011111 ..... ..... ----- 0111100000 - @X_bi
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## Vector Bit Manipulation Instruction
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VCFUGED 000100 ..... ..... ..... 10101001101 @VX
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