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disas/riscv.c: add disasm support for Zc* 

Zcmp/Zcmt instructions will override disasm for c.fld*/c.fsd*
instructions currently.

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>
Message-Id: <20230307081403.61950-10-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
master
Weiwei Li 2023-03-07 16:14:02 +08:00 committed by Alistair Francis
parent d364c0ab68
commit 2c71d02e17
1 changed files with 227 additions and 1 deletions
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228
disas/riscv.c
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@ -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 {
@ -1071,6 +1099,10 @@ 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 */
@ -2066,7 +2098,27 @@ 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 */
@ -2085,6 +2137,7 @@ 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";
@ -2307,6 +2360,24 @@ 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;
@ -2363,6 +2434,17 @@ 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;
}
@ -2418,6 +2500,46 @@ 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:
if (((inst >> 4) & 0b01111) >= 4) {
op = rv_op_cm_push;
}
break;
case 10:
if (((inst >> 4) & 0b01111) >= 4) {
op = rv_op_cm_pop;
}
break;
case 12:
if (((inst >> 4) & 0b01111) >= 4) {
op = rv_op_cm_popretz;
}
break;
case 14:
if (((inst >> 4) & 0b01111) >= 4) {
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;
@ -3662,6 +3784,21 @@ 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;
@ -3884,6 +4021,46 @@ 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)
{
int xlen_bytes_log2 = isa == rv64 ? 3 : 2;
int regs = rlist == 15 ? 13 : rlist - 3;
uint32_t stack_adj_base = ROUND_UP(regs << xlen_bytes_log2, 16);
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)
@ -4200,6 +4377,34 @@ 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;
};
}
@ -4359,6 +4564,9 @@ 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);
@ -4542,6 +4750,24 @@ 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 15:
snprintf(tmp, sizeof(tmp), "{ra, s0-s11}");
break;
default:
snprintf(tmp, sizeof(tmp), "{ra, s0-s%d}", dec->rlist - 5);
break;
}
append(buf, tmp, buflen);
break;
}
default:
break;
}