At 2022-11-29 10:43:43, "Weiwei Li" <liweiwei@iscas.ac.cn> wrote:
>Zcmp/Zcmt instructions will override disasm for c.fld*/c.fsd*
>instructions currently
we might make a encode using top 16 bits of flags in struct disassemble_info,
to describe enable status of zc-subsets.
Then we can pass it to disasm_inst in print_insn_riscv.
But I don't know if flags have any others.
>
>Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
>Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
>Acked-by: Alistair Francis <alistair.francis@wdc.com>
>---
> disas/riscv.c | 287 +++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 286 insertions(+), 1 deletion(-)
>
>diff --git a/disas/riscv.c b/disas/riscv.c
>index d216b9c39b..81369063b5 100644
>--- a/disas/riscv.c
>+++ b/disas/riscv.c
>@@ -163,6 +163,13 @@ typedef enum {
> rv_codec_v_i,
> rv_codec_vsetvli,
> rv_codec_vsetivli,
>+ rv_codec_zcb_ext,
>+ rv_codec_zcb_mul,
>+ rv_codec_zcb_lb,
>+ rv_codec_zcb_lh,
>+ rv_codec_zcmp_cm_pushpop,
>+ rv_codec_zcmp_cm_mv,
>+ rv_codec_zcmt_jt,
> } rv_codec;
>
> typedef enum {
>@@ -935,6 +942,26 @@ typedef enum {
> rv_op_vsetvli = 766,
> rv_op_vsetivli = 767,
> rv_op_vsetvl = 768,
>+ rv_op_c_zext_b = 769,
>+ rv_op_c_sext_b = 770,
>+ rv_op_c_zext_h = 771,
>+ rv_op_c_sext_h = 772,
>+ rv_op_c_zext_w = 773,
>+ rv_op_c_not = 774,
>+ rv_op_c_mul = 775,
>+ rv_op_c_lbu = 776,
>+ rv_op_c_lhu = 777,
>+ rv_op_c_lh = 778,
>+ rv_op_c_sb = 779,
>+ rv_op_c_sh = 780,
>+ rv_op_cm_push = 781,
>+ rv_op_cm_pop = 782,
>+ rv_op_cm_popret = 783,
>+ rv_op_cm_popretz = 784,
>+ rv_op_cm_mva01s = 785,
>+ rv_op_cm_mvsa01 = 786,
>+ rv_op_cm_jt = 787,
>+ rv_op_cm_jalt = 788,
> } rv_op;
>
> /* structures */
>@@ -958,6 +985,7 @@ typedef struct {
> uint8_t rnum;
> uint8_t vm;
> uint32_t vzimm;
>+ uint8_t rlist;
> } rv_decode;
>
> typedef struct {
>@@ -1070,6 +1098,10 @@ static const char rv_vreg_name_sym[32][4] = {
> #define rv_fmt_vd_vm "O\tDm"
> #define rv_fmt_vsetvli "O\t0,1,v"
> #define rv_fmt_vsetivli "O\t0,u,v"
>+#define rv_fmt_rs1_rs2_zce_ldst "O\t2,i(1)"
>+#define rv_fmt_push_rlist "O\tx,-i"
>+#define rv_fmt_pop_rlist "O\tx,i"
>+#define rv_fmt_zcmt_index "O\ti"
>
> /* pseudo-instruction constraints */
>
>@@ -2065,7 +2097,27 @@ const rv_opcode_data opcode_data[] = {
> { "vsext.vf8", rv_codec_v_r, rv_fmt_vd_vs2_vm, NULL, rv_op_vsext_vf8, rv_op_vsext_vf8, 0 },
> { "vsetvli", rv_codec_vsetvli, rv_fmt_vsetvli, NULL, rv_op_vsetvli, rv_op_vsetvli, 0 },
> { "vsetivli", rv_codec_vsetivli, rv_fmt_vsetivli, NULL, rv_op_vsetivli, rv_op_vsetivli, 0 },
>- { "vsetvl", rv_codec_r, rv_fmt_rd_rs1_rs2, NULL, rv_op_vsetvl, rv_op_vsetvl, 0 }
>+ { "vsetvl", rv_codec_r, rv_fmt_rd_rs1_rs2, NULL, rv_op_vsetvl, rv_op_vsetvl, 0 },
>+ { "c.zext.b", rv_codec_zcb_ext, rv_fmt_rd, NULL, 0 },
>+ { "c.sext.b", rv_codec_zcb_ext, rv_fmt_rd, NULL, 0 },
>+ { "c.zext.h", rv_codec_zcb_ext, rv_fmt_rd, NULL, 0 },
>+ { "c.sext.h", rv_codec_zcb_ext, rv_fmt_rd, NULL, 0 },
>+ { "c.zext.w", rv_codec_zcb_ext, rv_fmt_rd, NULL, 0 },
>+ { "c.not", rv_codec_zcb_ext, rv_fmt_rd, NULL, 0 },
>+ { "c.mul", rv_codec_zcb_mul, rv_fmt_rd_rs2, NULL, 0, 0 },
>+ { "c.lbu", rv_codec_zcb_lb, rv_fmt_rs1_rs2_zce_ldst, NULL, 0, 0, 0 },
>+ { "c.lhu", rv_codec_zcb_lh, rv_fmt_rs1_rs2_zce_ldst, NULL, 0, 0, 0 },
>+ { "c.lh", rv_codec_zcb_lh, rv_fmt_rs1_rs2_zce_ldst, NULL, 0, 0, 0 },
>+ { "c.sb", rv_codec_zcb_lb, rv_fmt_rs1_rs2_zce_ldst, NULL, 0, 0, 0 },
>+ { "c.sh", rv_codec_zcb_lh, rv_fmt_rs1_rs2_zce_ldst, NULL, 0, 0, 0 },
>+ { "cm.push", rv_codec_zcmp_cm_pushpop, rv_fmt_push_rlist, NULL, 0, 0 },
>+ { "cm.pop", rv_codec_zcmp_cm_pushpop, rv_fmt_pop_rlist, NULL, 0, 0 },
>+ { "cm.popret", rv_codec_zcmp_cm_pushpop, rv_fmt_pop_rlist, NULL, 0, 0, 0 },
>+ { "cm.popretz", rv_codec_zcmp_cm_pushpop, rv_fmt_pop_rlist, NULL, 0, 0 },
>+ { "cm.mva01s", rv_codec_zcmp_cm_mv, rv_fmt_rd_rs2, NULL, 0, 0, 0 },
>+ { "cm.mvsa01", rv_codec_zcmp_cm_mv, rv_fmt_rd_rs2, NULL, 0, 0, 0 },
>+ { "cm.jt", rv_codec_zcmt_jt, rv_fmt_zcmt_index, NULL, 0 },
>+ { "cm.jalt", rv_codec_zcmt_jt, rv_fmt_zcmt_index, NULL, 0 },
> };
>
> /* CSR names */
>@@ -2084,6 +2136,7 @@ static const char *csr_name(int csrno)
> case 0x000a: return "vxrm";
> case 0x000f: return "vcsr";
> case 0x0015: return "seed";
>+ case 0x0017: return "jvt";
> case 0x0040: return "uscratch";
> case 0x0041: return "uepc";
> case 0x0042: return "ucause";
>@@ -2306,6 +2359,24 @@ static void decode_inst_opcode(rv_decode *dec, rv_isa isa)
> op = rv_op_c_ld;
> }
> break;
>+ case 4:
>+ switch ((inst >> 10) & 0b111) {
>+ case 0: op = rv_op_c_lbu; break;
>+ case 1:
>+ if (((inst >> 6) & 1) == 0) {
>+ op = rv_op_c_lhu;
>+ } else {
>+ op = rv_op_c_lh;
>+ }
>+ break;
>+ case 2: op = rv_op_c_sb; break;
>+ case 3:
>+ if (((inst >> 6) & 1) == 0) {
>+ op = rv_op_c_sh;
>+ }
>+ break;
>+ }
>+ break;
> case 5:
> if (isa == rv128) {
> op = rv_op_c_sq;
>@@ -2362,6 +2433,17 @@ static void decode_inst_opcode(rv_decode *dec, rv_isa isa)
> case 3: op = rv_op_c_and; break;
> case 4: op = rv_op_c_subw; break;
> case 5: op = rv_op_c_addw; break;
>+ case 6: op = rv_op_c_mul; break;
>+ case 7:
>+ switch ((inst >> 2) & 0b111) {
>+ case 0: op = rv_op_c_zext_b; break;
>+ case 1: op = rv_op_c_sext_b; break;
>+ case 2: op = rv_op_c_zext_h; break;
>+ case 3: op = rv_op_c_sext_h; break;
>+ case 4: op = rv_op_c_zext_w; break;
>+ case 5: op = rv_op_c_not; break;
>+ }
>+ break;
> }
> break;
> }
>@@ -2417,6 +2499,30 @@ static void decode_inst_opcode(rv_decode *dec, rv_isa isa)
> op = rv_op_c_sqsp;
> } else {
> op = rv_op_c_fsdsp;
>+ if (((inst >> 12) & 0b01)) {
>+ switch ((inst >> 8) & 0b01111) {
>+ case 8: op = rv_op_cm_push; break;
>+ case 10: op = rv_op_cm_pop; break;
>+ case 12: op = rv_op_cm_popretz; break;
>+ case 14: op = rv_op_cm_popret; break;
>+ }
>+ } else {
>+ switch ((inst >> 10) & 0b011) {
>+ case 0:
>+ if (((inst >> 2) & 0xFF) >= 32) {
>+ op = rv_op_cm_jalt;
>+ } else {
>+ op = rv_op_cm_jt;
>+ }
>+ break;
>+ case 3:
>+ switch ((inst >> 5) & 0b011) {
>+ case 1: op = rv_op_cm_mvsa01; break;
>+ case 3: op = rv_op_cm_mva01s; break;
>+ }
>+ break;
>+ }
>+ }
> }
> break;
> case 6: op = rv_op_c_swsp; break;
>@@ -3661,6 +3767,21 @@ static uint32_t operand_crs2q(rv_inst inst)
> return (inst << 59) >> 61;
> }
>
>+static uint32_t calculate_xreg(uint32_t sreg)
>+{
>+ return sreg < 2 ? sreg + 8 : sreg + 16;
>+}
>+
>+static uint32_t operand_sreg1(rv_inst inst)
>+{
>+ return calculate_xreg((inst << 54) >> 61);
>+}
>+
>+static uint32_t operand_sreg2(rv_inst inst)
>+{
>+ return calculate_xreg((inst << 59) >> 61);
>+}
>+
> static uint32_t operand_crd(rv_inst inst)
> {
> return (inst << 52) >> 59;
>@@ -3883,6 +4004,97 @@ static uint32_t operand_vm(rv_inst inst)
> return (inst << 38) >> 63;
> }
>
>+static uint32_t operand_uimm_c_lb(rv_inst inst)
>+{
>+ return (((inst << 58) >> 63) << 1) |
>+ ((inst << 57) >> 63);
>+}
>+
>+static uint32_t operand_uimm_c_lh(rv_inst inst)
>+{
>+ return (((inst << 58) >> 63) << 1);
>+}
>+
>+static uint32_t operand_zcmp_spimm(rv_inst inst)
>+{
>+ return ((inst << 60) >> 62) << 4;
>+}
>+
>+static uint32_t operand_zcmp_rlist(rv_inst inst)
>+{
>+ return ((inst << 56) >> 60);
>+}
>+
>+static uint32_t calculate_stack_adj(rv_isa isa, uint32_t rlist, uint32_t spimm)
>+{
>+ uint32_t stack_adj_base = 0;
>+ if (isa == rv64) {
>+ switch (rlist) {
>+ case 15:
>+ stack_adj_base = 112;
>+ break;
>+ case 14:
>+ stack_adj_base = 96;
>+ break;
>+ case 13:
>+ case 12:
>+ stack_adj_base = 80;
>+ break;
>+ case 11:
>+ case 10:
>+ stack_adj_base = 64;
>+ break;
>+ case 9:
>+ case 8:
>+ stack_adj_base = 48;
>+ break;
>+ case 7:
>+ case 6:
>+ stack_adj_base = 32;
>+ break;
>+ case 5:
>+ case 4:
>+ stack_adj_base = 16;
>+ break;
>+ }
>+ } else {
>+ switch (rlist) {
>+ case 15:
>+ stack_adj_base = 64;
>+ break;
>+ case 14:
>+ case 13:
>+ case 12:
>+ stack_adj_base = 48;
>+ break;
>+ case 11:
>+ case 10:
>+ case 9:
>+ case 8:
>+ stack_adj_base = 32;
>+ break;
>+ case 7:
>+ case 6:
>+ case 5:
>+ case 4:
>+ stack_adj_base = 16;
>+ break;
>+ }
>+ }
>+ return stack_adj_base + spimm;
>+}
>+
>+static uint32_t operand_zcmp_stack_adj(rv_inst inst, rv_isa isa)
>+{
>+ return calculate_stack_adj(isa, operand_zcmp_rlist(inst),
>+ operand_zcmp_spimm(inst));
>+}
>+
>+static uint32_t operand_tbl_index(rv_inst inst)
>+{
>+ return ((inst << 54) >> 56);
>+}
>+
> /* decode operands */
>
> static void decode_inst_operands(rv_decode *dec, rv_isa isa)
>@@ -4199,6 +4411,34 @@ static void decode_inst_operands(rv_decode *dec, rv_isa isa)
> dec->imm = operand_vimm(inst);
> dec->vzimm = operand_vzimm10(inst);
> break;
>+ case rv_codec_zcb_lb:
>+ dec->rs1 = operand_crs1q(inst) + 8;
>+ dec->rs2 = operand_crs2q(inst) + 8;
>+ dec->imm = operand_uimm_c_lb(inst);
>+ break;
>+ case rv_codec_zcb_lh:
>+ dec->rs1 = operand_crs1q(inst) + 8;
>+ dec->rs2 = operand_crs2q(inst) + 8;
>+ dec->imm = operand_uimm_c_lh(inst);
>+ break;
>+ case rv_codec_zcb_ext:
>+ dec->rd = operand_crs1q(inst) + 8;
>+ break;
>+ case rv_codec_zcb_mul:
>+ dec->rd = operand_crs1rdq(inst) + 8;
>+ dec->rs2 = operand_crs2q(inst) + 8;
>+ break;
>+ case rv_codec_zcmp_cm_pushpop:
>+ dec->imm = operand_zcmp_stack_adj(inst, isa);
>+ dec->rlist = operand_zcmp_rlist(inst);
>+ break;
>+ case rv_codec_zcmp_cm_mv:
>+ dec->rd = operand_sreg1(inst);
>+ dec->rs2 = operand_sreg2(inst);
>+ break;
>+ case rv_codec_zcmt_jt:
>+ dec->imm = operand_tbl_index(inst);
>+ break;
> };
> }
>
>@@ -4358,6 +4598,9 @@ static void format_inst(char *buf, size_t buflen, size_t tab, rv_decode *dec)
> case ')':
> append(buf, ")", buflen);
> break;
>+ case '-':
>+ append(buf, "-", buflen);
>+ break;
> case 'b':
> snprintf(tmp, sizeof(tmp), "%d", dec->bs);
> append(buf, tmp, buflen);
>@@ -4541,6 +4784,48 @@ static void format_inst(char *buf, size_t buflen, size_t tab, rv_decode *dec)
> append(buf, vma, buflen);
> break;
> }
>+ case 'x': {
>+ switch (dec->rlist) {
>+ case 4:
>+ snprintf(tmp, sizeof(tmp), "{ra}");
>+ break;
>+ case 5:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0}");
>+ break;
>+ case 6:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s1}");
>+ break;
>+ case 7:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s2}");
>+ break;
>+ case 8:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s3}");
>+ break;
>+ case 9:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s4}");
>+ break;
>+ case 10:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s5}");
>+ break;
>+ case 11:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s6}");
>+ break;
>+ case 12:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s7}");
>+ break;
>+ case 13:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s8}");
>+ break;
>+ case 14:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s9}");
>+ break;
>+ case 15:
>+ snprintf(tmp, sizeof(tmp), "{ra, s0-s11}");
>+ break;
>+ }
>+ append(buf, tmp, buflen);
>+ break;
>+ }
> default:
> break;
> }
>--
>2.25.1
>