From: Emmanuel Blot <[email protected]> Placed in a separate file as a vendor extension.
Signed-off-by: James Wainwright <[email protected]> --- MAINTAINERS | 2 +- disas/meson.build | 3 +- disas/riscv-xlrbr.c | 79 +++++++++++++++++++++++++++++++++++++++++++++ disas/riscv-xlrbr.h | 19 +++++++++++ disas/riscv.c | 2 ++ 5 files changed, 103 insertions(+), 2 deletions(-) create mode 100644 disas/riscv-xlrbr.c create mode 100644 disas/riscv-xlrbr.h diff --git a/MAINTAINERS b/MAINTAINERS index 847fd414bc..12f106f4c4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4154,7 +4154,7 @@ M: Alistair Francis <[email protected]> L: [email protected] S: Maintained F: tcg/riscv64/ -F: disas/riscv.[ch] +F: disas/riscv*.[ch] S390 TCG target M: Richard Henderson <[email protected]> diff --git a/disas/meson.build b/disas/meson.build index bbfa119783..42977a1f74 100644 --- a/disas/meson.build +++ b/disas/meson.build @@ -7,7 +7,8 @@ common_ss.add(when: 'CONFIG_MIPS_DIS', if_true: files('mips.c', 'nanomips.c')) common_ss.add(when: 'CONFIG_RISCV_DIS', if_true: files( 'riscv.c', 'riscv-xthead.c', - 'riscv-xventana.c' + 'riscv-xventana.c', + 'riscv-xlrbr.c' )) common_ss.add(when: 'CONFIG_SH4_DIS', if_true: files('sh4.c')) common_ss.add(when: 'CONFIG_SPARC_DIS', if_true: files('sparc.c')) diff --git a/disas/riscv-xlrbr.c b/disas/riscv-xlrbr.c new file mode 100644 index 0000000000..57cb434523 --- /dev/null +++ b/disas/riscv-xlrbr.c @@ -0,0 +1,79 @@ +/* + * QEMU RISC-V Disassembler for xlrbr matching the unratified Zbr CRC32 + * bitmanip extension v0.93. + * + * Copyright (c) 2023 Rivos Inc + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" + +#include "disas/riscv.h" +#include "disas/riscv-xlrbr.h" + +typedef enum { + /* 0 is reserved for rv_op_illegal. */ + rv_op_crc32_b = 1, + rv_op_crc32_h = 2, + rv_op_crc32_w = 3, + rv_op_crc32_d = 4, + rv_op_crc32c_b = 5, + rv_op_crc32c_h = 6, + rv_op_crc32c_w = 7, + rv_op_crc32c_d = 8, +} rv_xlrbr_op; + +const rv_opcode_data rv_xlrbr_opcode_data[] = { + { "illegal", rv_codec_illegal, rv_fmt_none, NULL, 0, 0, 0 }, + { "crc32.b", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32.h", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32.w", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32.d", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32c.b", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32c.h", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32c.w", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, + { "crc32c.d", rv_codec_r, rv_fmt_rd_rs1, NULL, 0, 0, 0 }, +}; + +void decode_xlrbr(rv_decode *dec, rv_isa isa) +{ + rv_inst inst = dec->inst; + rv_opcode op = rv_op_illegal; + + switch ((inst >> 0) & 0b1111111) { + case 0b0010011: + switch ((inst >> 12) & 0b111) { + case 0b001: + switch ((inst >> 20 & 0b111111111111)) { + case 0b011000010000: + op = rv_op_crc32_b; + break; + case 0b011000010001: + op = rv_op_crc32_h; + break; + case 0b011000010010: + op = rv_op_crc32_w; + break; + case 0b011000010011: + op = rv_op_crc32_d; + break; + case 0b011000011000: + op = rv_op_crc32c_b; + break; + case 0b011000011001: + op = rv_op_crc32c_h; + break; + case 0b011000011010: + op = rv_op_crc32c_w; + break; + case 0b011000011011: + op = rv_op_crc32c_d; + break; + } + break; + } + break; + } + dec->op = op; +} diff --git a/disas/riscv-xlrbr.h b/disas/riscv-xlrbr.h new file mode 100644 index 0000000000..939a69ea6d --- /dev/null +++ b/disas/riscv-xlrbr.h @@ -0,0 +1,19 @@ +/* + * QEMU RISC-V Disassembler for xlrbr matching the unratified Zbr CRC32 + * bitmanip extension v0.93. + * + * Copyright (c) 2023 Rivos Inc + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef DISAS_RISCV_XLRBR_H +#define DISAS_RISCV_XLRBR_H + +#include "disas/riscv.h" + +extern const rv_opcode_data rv_xlrbr_opcode_data[]; + +void decode_xlrbr(rv_decode *, rv_isa); + +#endif /* DISAS_RISCV_XLRBR_H */ diff --git a/disas/riscv.c b/disas/riscv.c index 6f2667482d..d416a4d6b3 100644 --- a/disas/riscv.c +++ b/disas/riscv.c @@ -26,6 +26,7 @@ /* Vendor extensions */ #include "disas/riscv-xthead.h" #include "disas/riscv-xventana.h" +#include "disas/riscv-xlrbr.h" typedef enum { /* 0 is reserved for rv_op_illegal. */ @@ -5434,6 +5435,7 @@ static GString *disasm_inst(rv_isa isa, uint64_t pc, rv_inst inst, { has_xtheadmempair_p, xthead_opcode_data, decode_xtheadmempair }, { has_xtheadsync_p, xthead_opcode_data, decode_xtheadsync }, { has_XVentanaCondOps_p, ventana_opcode_data, decode_xventanacondops }, + { has_xlrbr_p, rv_xlrbr_opcode_data, decode_xlrbr }, }; for (size_t i = 0; i < ARRAY_SIZE(decoders); i++) { -- 2.48.1
