diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2019-04-01 10:11:52 +0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2019-05-24 12:09:22 -0700 |
| commit | c2cfb97c01a3636867c1a4a24f8a99fd8c6bed28 (patch) | |
| tree | b6363d8f08bd00add2634d096b501ffbb2496fb2 /target/riscv/insn16.decode | |
| parent | 6cafec92f1c862a9754ef6a28be68ba7178a284d (diff) | |
target/riscv: Use pattern groups in insn16.decode
This eliminates about half of the complicated decode
bits within insn_trans/trans_rvc.inc.c.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'target/riscv/insn16.decode')
| -rw-r--r-- | target/riscv/insn16.decode | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode index add9cf3923..3c79edf1c9 100644 --- a/target/riscv/insn16.decode +++ b/target/riscv/insn16.decode @@ -70,7 +70,6 @@ # Formats 16: @cr .... ..... ..... .. &r rs2=%rs2_5 rs1=%rd %rd @ci ... . ..... ..... .. &i imm=%imm_ci rs1=%rd %rd -@ciw ... ........ ... .. &ciw nzuimm=%nzuimm_ciw rd=%rs2_3 @cl_d ... ... ... .. ... .. &i imm=%uimm_cl_d rs1=%rs1_3 rd=%rs2_3 @cl_w ... ... ... .. ... .. &i imm=%uimm_cl_w rs1=%rs1_3 rd=%rs2_3 @cl ... ... ... .. ... .. &cl rs1=%rs1_3 rd=%rs2_3 @@ -86,8 +85,12 @@ @c_sdsp ... . ..... ..... .. &s imm=%uimm_6bit_sd rs1=2 rs2=%rs2_5 @c_swsp ... . ..... ..... .. &s imm=%uimm_6bit_sw rs1=2 rs2=%rs2_5 @c_li ... . ..... ..... .. &i imm=%imm_ci rs1=0 %rd +@c_lui ... . ..... ..... .. &u imm=%imm_lui %rd +@c_jalr ... . ..... ..... .. &i imm=0 rs1=%rd +@c_mv ... . ..... ..... .. &i imm=0 rs1=%rs2_5 %rd -@c_addi16sp_lui ... . ..... ..... .. &caddi16sp_lui %imm_lui %imm_addi16sp %rd +@c_addi4spn ... . ..... ..... .. &i imm=%nzuimm_ciw rs1=2 rd=%rs2_3 +@c_addi16sp ... . ..... ..... .. &i imm=%imm_addi16sp rs1=2 rd=2 @c_flwsp_ldsp ... . ..... ..... .. &cflwsp_ldsp uimm_flwsp=%uimm_6bit_lw \ uimm_ldsp=%uimm_6bit_ld %rd @c_fswsp_sdsp ... . ..... ..... .. &cfswsp_sdsp uimm_fswsp=%uimm_6bit_sw \ @@ -101,7 +104,11 @@ @c_andi ... . .. ... ..... .. &i imm=%imm_ci rs1=%rs1_3 rd=%rs1_3 # *** RV64C Standard Extension (Quadrant 0) *** -c_addi4spn 000 ........ ... 00 @ciw +{ + # Opcode of all zeros is illegal; rd != 0, nzuimm == 0 is reserved. + illegal 000 000 000 00 --- 00 + addi 000 ... ... .. ... 00 @c_addi4spn +} fld 001 ... ... .. ... 00 @cl_d lw 010 ... ... .. ... 00 @cl_w c_flw_ld 011 --- ... -- ... 00 @cl #Note: Must parse uimm manually @@ -113,7 +120,10 @@ c_fsw_sd 111 --- ... -- ... 00 @cs #Note: Must parse uimm manually addi 000 . ..... ..... 01 @ci c_jal_addiw 001 . ..... ..... 01 @ci #Note: parse rd and/or imm manually addi 010 . ..... ..... 01 @c_li -c_addi16sp_lui 011 . ..... ..... 01 @c_addi16sp_lui # shares opc with C.LUI +{ + addi 011 . 00010 ..... 01 @c_addi16sp + lui 011 . ..... ..... 01 @c_lui +} srli 100 . 00 ... ..... 01 @c_shift srai 100 . 01 ... ..... 01 @c_shift andi 100 . 10 ... ..... 01 @c_andi @@ -132,8 +142,15 @@ slli 000 . ..... ..... 10 @c_shift2 fld 001 . ..... ..... 10 @c_ldsp lw 010 . ..... ..... 10 @c_lwsp c_flwsp_ldsp 011 . ..... ..... 10 @c_flwsp_ldsp #C.LDSP:RV64;C.FLWSP:RV32 -c_jr_mv 100 0 ..... ..... 10 @cr -c_ebreak_jalr_add 100 1 ..... ..... 10 @cr +{ + jalr 100 0 ..... 00000 10 @c_jalr rd=0 # C.JR + addi 100 0 ..... ..... 10 @c_mv +} +{ + ebreak 100 1 00000 00000 10 + jalr 100 1 ..... 00000 10 @c_jalr rd=1 # C.JALR + add 100 1 ..... ..... 10 @cr +} fsd 101 ...... ..... 10 @c_sdsp sw 110 . ..... ..... 10 @c_swsp c_fswsp_sdsp 111 . ..... ..... 10 @c_fswsp_sdsp #C.SDSP:RV64;C.FSWSP:RV32 |