>
>
> Alistair
>
>> ---
>> target/riscv/insn16.decode | 43 +++++++
>> target/riscv/insn_trans/trans_rvc.inc.c | 151 ++++++++++++++++++++++++
>> target/riscv/translate.c | 118 +-----------------
>> 3 files changed, 195 insertions(+), 117 deletions(-)
>>
>> diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode
>> index 558c0c41f0b5..45109301c6d4 100644
>> --- a/target/riscv/insn16.decode
>> +++ b/target/riscv/insn16.decode
>> @@ -22,28 +22,53 @@
>> %rs2_3 2:3 !function=ex_rvc_register
>>
>> # Immediates:
>> +%imm_ci 12:s1 2:5
>> %nzuimm_ciw 7:4 11:2 5:1 6:1 !function=ex_shift_2
>> %uimm_cl_d 5:2 10:3 !function=ex_shift_3
>> %uimm_cl_w 5:1 10:3 6:1 !function=ex_shift_2
>> +%imm_cb 12:s1 5:2 2:1 10:2 3:2 !function=ex_shift_1
>> +%imm_cj 12:s1 8:1 9:2 6:1 7:1 2:1 11:1 3:3 !function=ex_shift_1
>> +
>> +%nzuimm_6bit 12:1 2:5
>> +
>> +%imm_addi16sp 12:s1 3:2 5:1 2:1 6:1 !function=ex_shift_4
>> +%imm_lui 12:s1 2:5 !function=ex_shift_12
>> +
>>
>>
>> # Argument sets:
>> &cl rs1 rd
>> &cl_dw uimm rs1 rd
>> +&ci imm rd
>> &ciw nzuimm rd
>> &cs rs1 rs2
>> &cs_dw uimm rs1 rs2
>> +&cb imm rs1
>> +&cr rd rs2
>> +&cj imm
>> +&c_shift shamt rd
>> +
>>
>> +&caddi16sp_lui imm_lui imm_addi16sp rd
>>
>> # Formats 16:
>> +@ci ... . ..... ..... .. &ci imm=%imm_ci %rd
>> @ciw ... ........ ... .. &ciw nzuimm=%nzuimm_ciw
rd=%rs2_3
>> @cl_d ... ... ... .. ... .. &cl_dw uimm=%uimm_cl_d rs1=%rs1_3
rd=%rs2_3
>> @cl_w ... ... ... .. ... .. &cl_dw uimm=%uimm_cl_w rs1=%rs1_3
rd=%rs2_3
>> @cl ... ... ... .. ... .. &cl rs1=%rs1_3
rd=%rs2_3
>> @cs ... ... ... .. ... .. &cs rs1=%rs1_3
rs2=%rs2_3
>> +@cs_2 ... ... ... .. ... .. &cr rd=%rs1_3
rs2=%rs2_3
>> @cs_d ... ... ... .. ... .. &cs_dw uimm=%uimm_cl_d rs1=%rs1_3
rs2=%rs2_3
>> @cs_w ... ... ... .. ... .. &cs_dw uimm=%uimm_cl_w rs1=%rs1_3
rs2=%rs2_3
>> +@cb ... ... ... .. ... .. &cb imm=%imm_cb rs1=%rs1_3
>> +@cj ... ........... .. &cj imm=%imm_cj
>>
>> +@c_addi16sp_lui ... . ..... ..... .. &caddi16sp_lui %imm_lui %imm_addi16sp
%rd
>> +
>> +@c_shift ... . .. ... ..... .. &c_shift rd=%rs1_3 shamt=%nzuimm_6bit
>> +
>> +@c_andi ... . .. ... ..... .. &ci imm=%imm_ci rd=%rs1_3
>>
>> # *** RV64C Standard Extension (Quadrant 0) ***
>> c_addi4spn 000 ........ ... 00 @ciw
>> @@ -53,3 +78,21 @@ c_flw_ld 011 --- ... -- ... 00 @cl #Note:
Must parse uimm manually
>> c_fsd 101 ... ... .. ... 00 @cs_d
>> c_sw 110 ... ... .. ... 00 @cs_w
>> c_fsw_sd 111 --- ... -- ... 00 @cs #Note: Must parse uimm
manually
>> +
>> +# *** RV64C Standard Extension (Quadrant 1) ***
>> +c_addi 000 . ..... ..... 01 @ci
>> +c_jal_addiw 001 . ..... ..... 01 @ci #Note: parse rd and/or imm
manually
>> +c_li 010 . ..... ..... 01 @ci
>> +c_addi16sp_lui 011 . ..... ..... 01 @c_addi16sp_lui # shares opc with
C.LUI
>> +c_srli 100 . 00 ... ..... 01 @c_shift
>> +c_srai 100 . 01 ... ..... 01 @c_shift
>> +c_andi 100 . 10 ... ..... 01 @c_andi
>> +c_sub 100 0 11 ... 00 ... 01 @cs_2
>> +c_xor 100 0 11 ... 01 ... 01 @cs_2
>> +c_or 100 0 11 ... 10 ... 01 @cs_2
>> +c_and 100 0 11 ... 11 ... 01 @cs_2
>> +c_subw 100 1 11 ... 00 ... 01 @cs_2
>> +c_addw 100 1 11 ... 01 ... 01 @cs_2
>> +c_j 101 ........... 01 @cj
>> +c_beqz 110 ... ... ..... 01 @cb
>> +c_bnez 111 ... ... ..... 01 @cb
>> diff --git a/target/riscv/insn_trans/trans_rvc.inc.c
b/target/riscv/insn_trans/trans_rvc.inc.c
>> index 93ec8aa30b95..b06c435c9800 100644
>> --- a/target/riscv/insn_trans/trans_rvc.inc.c
>> +++ b/target/riscv/insn_trans/trans_rvc.inc.c
>> @@ -73,3 +73,154 @@ static bool trans_c_fsw_sd(DisasContext *ctx,
arg_c_fsw_sd *a)
>> return false;
>> #endif
>> }
>> +
>> +static bool trans_c_addi(DisasContext *ctx, arg_c_addi *a)
>> +{
>> + if (a->imm == 0) {
>> + /* Hint: insn is valid but does not affect state */
>> + return true;
>> + }
>> + arg_addi arg = { .rd = a->rd, .rs1 = a->rd, .imm = a->imm };
>> + return trans_addi(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_jal_addiw(DisasContext *ctx, arg_c_jal_addiw *a)
>> +{
>> +#ifdef TARGET_RISCV32
>> + /* C.JAL */
>> + arg_jal arg = { .rd = 1, .imm = a->imm };
>> + return trans_jal(ctx, &arg);
>> +#else
>> + /* C.ADDIW */
>> + arg_addiw arg = { .rd = a->rd, .rs1 = a->rd, .imm = a->imm };
>> + return trans_addiw(ctx, &arg);
>> +#endif
>> +}
>> +
>> +static bool trans_c_li(DisasContext *ctx, arg_c_li *a)
>> +{
>> + if (a->rd == 0) {
>> + /* Hint: insn is valid but does not affect state */
>> + return true;
>> + }
>> + arg_addi arg = { .rd = a->rd, .rs1 = 0, .imm = a->imm };
>> + return trans_addi(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_addi16sp_lui(DisasContext *ctx, arg_c_addi16sp_lui *a)
>> +{
>> + if (a->rd == 2) {
>> + /* C.ADDI16SP */
>> + arg_addi arg = { .rd = 2, .rs1 = 2, .imm = a->imm_addi16sp };
>> + return trans_addi(ctx, &arg);
>> + } else if (a->imm_lui != 0) {
>> + /* C.LUI */
>> + if (a->rd == 0) {
>> + /* Hint: insn is valid but does not affect state */
>> + return true;
>> + }
>> + arg_lui arg = { .rd = a->rd, .imm = a->imm_lui };
>> + return trans_lui(ctx, &arg);
>> + }
>> + return false;
>> +}
>> +
>> +static bool trans_c_srli(DisasContext *ctx, arg_c_srli *a)
>> +{
>> + int shamt = a->shamt;
>> + if (shamt == 0) {
>> + /* For RV128 a shamt of 0 means a shift by 64 */
>> + shamt = 64;
>> + }
>> + /* Ensure, that shamt[5] is zero for RV32 */
>> + if (shamt >= TARGET_LONG_BITS) {
>> + return false;
>> + }
>> +
>> + arg_srli arg = { .rd = a->rd, .rs1 = a->rd, .shamt = a->shamt };
>> + return trans_srli(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_srai(DisasContext *ctx, arg_c_srai *a)
>> +{
>> + int shamt = a->shamt;
>> + if (shamt == 0) {
>> + /* For RV128 a shamt of 0 means a shift by 64 */
>> + shamt = 64;
>> + }
>> + /* Ensure, that shamt[5] is zero for RV32 */
>> + if (shamt >= TARGET_LONG_BITS) {
>> + return false;
>> + }
>> +
>> + arg_srai arg = { .rd = a->rd, .rs1 = a->rd, .shamt = a->shamt };
>> + return trans_srai(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_andi(DisasContext *ctx, arg_c_andi *a)
>> +{
>> + arg_andi arg = { .rd = a->rd, .rs1 = a->rd, .imm = a->imm };
>> + return trans_andi(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_sub(DisasContext *ctx, arg_c_sub *a)
>> +{
>> + arg_sub arg = { .rd = a->rd, .rs1 = a->rd, .rs2 = a->rs2 };
>> + return trans_sub(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_xor(DisasContext *ctx, arg_c_xor *a)
>> +{
>> + arg_xor arg = { .rd = a->rd, .rs1 = a->rd, .rs2 = a->rs2 };
>> + return trans_xor(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_or(DisasContext *ctx, arg_c_or *a)
>> +{
>> + arg_or arg = { .rd = a->rd, .rs1 = a->rd, .rs2 = a->rs2 };
>> + return trans_or(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_and(DisasContext *ctx, arg_c_and *a)
>> +{
>> + arg_and arg = { .rd = a->rd, .rs1 = a->rd, .rs2 = a->rs2 };
>> + return trans_and(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_subw(DisasContext *ctx, arg_c_subw *a)
>> +{
>> +#ifdef TARGET_RISCV64
>> + arg_subw arg = { .rd = a->rd, .rs1 = a->rd, .rs2 = a->rs2 };
>> + return trans_subw(ctx, &arg);
>> +#else
>> + return false;
>> +#endif
>> +}
>> +
>> +static bool trans_c_addw(DisasContext *ctx, arg_c_addw *a)
>> +{
>> +#ifdef TARGET_RISCV64
>> + arg_addw arg = { .rd = a->rd, .rs1 = a->rd, .rs2 = a->rs2 };
>> + return trans_addw(ctx, &arg);
>> +#else
>> + return false;
>> +#endif
>> +}
>> +
>> +static bool trans_c_j(DisasContext *ctx, arg_c_j *a)
>> +{
>> + arg_jal arg = { .rd = 0, .imm = a->imm };
>> + return trans_jal(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_beqz(DisasContext *ctx, arg_c_beqz *a)
>> +{
>> + arg_beq arg = { .rs1 = a->rs1, .rs2 = 0, .imm = a->imm };
>> + return trans_beq(ctx, &arg);
>> +}
>> +
>> +static bool trans_c_bnez(DisasContext *ctx, arg_c_bnez *a)
>> +{
>> + arg_bne arg = { .rs1 = a->rs1, .rs2 = 0, .imm = a->imm };
>> + return trans_bne(ctx, &arg);
>> +}
>> diff --git a/target/riscv/translate.c b/target/riscv/translate.c
>> index 0106fa8d51b3..a584c24fbf6b 100644
>> --- a/target/riscv/translate.c
>> +++ b/target/riscv/translate.c
>> @@ -828,120 +828,6 @@ static void decode_RV32_64C0(DisasContext *ctx)
>> }
>> }
>>
>> -static void decode_RV32_64C1(DisasContext *ctx)
>> -{
>> - uint8_t funct3 = extract32(ctx->opcode, 13, 3);
>> - uint8_t rd_rs1 = GET_C_RS1(ctx->opcode);
>> - uint8_t rs1s, rs2s;
>> - uint8_t funct2;
>> -
>> - switch (funct3) {
>> - case 0:
>> - /* C.ADDI -> addi rd, rd, nzimm[5:0] */
>> - gen_arith_imm(ctx, OPC_RISC_ADDI, rd_rs1, rd_rs1,
>> - GET_C_IMM(ctx->opcode));
>> - break;
>> - case 1:
>> -#if defined(TARGET_RISCV64)
>> - /* C.ADDIW (RV64/128) -> addiw rd, rd, imm[5:0]*/
>> - gen_arith_imm(ctx, OPC_RISC_ADDIW, rd_rs1, rd_rs1,
>> - GET_C_IMM(ctx->opcode));
>> -#else
>> - /* C.JAL(RV32) -> jal x1, offset[11:1] */
>> - gen_jal(ctx, 1, GET_C_J_IMM(ctx->opcode));
>> -#endif
>> - break;
>> - case 2:
>> - /* C.LI -> addi rd, x0, imm[5:0]*/
>> - gen_arith_imm(ctx, OPC_RISC_ADDI, rd_rs1, 0,
GET_C_IMM(ctx->opcode));
>> - break;
>> - case 3:
>> - if (rd_rs1 == 2) {
>> - /* C.ADDI16SP -> addi x2, x2, nzimm[9:4]*/
>> - gen_arith_imm(ctx, OPC_RISC_ADDI, 2, 2,
>> - GET_C_ADDI16SP_IMM(ctx->opcode));
>> - } else if (rd_rs1 != 0) {
>> - /* C.LUI (rs1/rd =/= {0,2}) -> lui rd, nzimm[17:12]*/
>> - tcg_gen_movi_tl(cpu_gpr[rd_rs1],
>> - GET_C_IMM(ctx->opcode) << 12);
>> - }
>> - break;
>> - case 4:
>> - funct2 = extract32(ctx->opcode, 10, 2);
>> - rs1s = GET_C_RS1S(ctx->opcode);
>> - switch (funct2) {
>> - case 0: /* C.SRLI(RV32) -> srli rd', rd', shamt[5:0] */
>> - gen_arith_imm(ctx, OPC_RISC_SHIFT_RIGHT_I, rs1s, rs1s,
>> - GET_C_ZIMM(ctx->opcode));
>> - /* C.SRLI64(RV128) */
>> - break;
>> - case 1:
>> - /* C.SRAI -> srai rd', rd', shamt[5:0]*/
>> - gen_arith_imm(ctx, OPC_RISC_SHIFT_RIGHT_I, rs1s, rs1s,
>> - GET_C_ZIMM(ctx->opcode) | 0x400);
>> - /* C.SRAI64(RV128) */
>> - break;
>> - case 2:
>> - /* C.ANDI -> andi rd', rd', imm[5:0]*/
>> - gen_arith_imm(ctx, OPC_RISC_ANDI, rs1s, rs1s,
>> - GET_C_IMM(ctx->opcode));
>> - break;
>> - case 3:
>> - funct2 = extract32(ctx->opcode, 5, 2);
>> - rs2s = GET_C_RS2S(ctx->opcode);
>> - switch (funct2) {
>> - case 0:
>> - /* C.SUB -> sub rd', rd', rs2' */
>> - if (extract32(ctx->opcode, 12, 1) == 0) {
>> - gen_arith(ctx, OPC_RISC_SUB, rs1s, rs1s, rs2s);
>> - }
>> -#if defined(TARGET_RISCV64)
>> - else {
>> - gen_arith(ctx, OPC_RISC_SUBW, rs1s, rs1s, rs2s);
>> - }
>> -#endif
>> - break;
>> - case 1:
>> - /* C.XOR -> xor rs1', rs1', rs2' */
>> - if (extract32(ctx->opcode, 12, 1) == 0) {
>> - gen_arith(ctx, OPC_RISC_XOR, rs1s, rs1s, rs2s);
>> - }
>> -#if defined(TARGET_RISCV64)
>> - else {
>> - /* C.ADDW (RV64/128) */
>> - gen_arith(ctx, OPC_RISC_ADDW, rs1s, rs1s, rs2s);
>> - }
>> -#endif
>> - break;
>> - case 2:
>> - /* C.OR -> or rs1', rs1', rs2' */
>> - gen_arith(ctx, OPC_RISC_OR, rs1s, rs1s, rs2s);
>> - break;
>> - case 3:
>> - /* C.AND -> and rs1', rs1', rs2' */
>> - gen_arith(ctx, OPC_RISC_AND, rs1s, rs1s, rs2s);
>> - break;
>> - }
>> - break;
>> - }
>> - break;
>> - case 5:
>> - /* C.J -> jal x0, offset[11:1]*/
>> - gen_jal(ctx, 0, GET_C_J_IMM(ctx->opcode));
>> - break;
>> - case 6:
>> - /* C.BEQZ -> beq rs1', x0, offset[8:1]*/
>> - rs1s = GET_C_RS1S(ctx->opcode);
>> - gen_branch(ctx, OPC_RISC_BEQ, rs1s, 0, GET_C_B_IMM(ctx->opcode));
>> - break;
>> - case 7:
>> - /* C.BNEZ -> bne rs1', x0, offset[8:1]*/
>> - rs1s = GET_C_RS1S(ctx->opcode);
>> - gen_branch(ctx, OPC_RISC_BNE, rs1s, 0, GET_C_B_IMM(ctx->opcode));
>> - break;
>> - }
>> -}
>> -
>> static void decode_RV32_64C2(DisasContext *ctx)
>> {
>> uint8_t rd, rs2;
>> @@ -1028,9 +914,6 @@ static void decode_RV32_64C(DisasContext *ctx)
>> case 0:
>> decode_RV32_64C0(ctx);
>> break;
>> - case 1:
>> - decode_RV32_64C1(ctx);
>> - break;
>> case 2:
>> decode_RV32_64C2(ctx);
>> break;
>> @@ -1045,6 +928,7 @@ static void decode_RV32_64C(DisasContext *ctx)
>> EX_SH(1)
>> EX_SH(2)
>> EX_SH(3)
>> +EX_SH(4)
>> EX_SH(12)
>>
>> #define REQUIRE_EXT(ctx, ext) do { \
>> --
>> 2.19.2
>>
>>
