1 // See LICENSE for license details.
6 reg_t
FN(processor_t
* p
, insn_t s_insn
, reg_t pc
)
9 reg_t npc
= sext_xlen(pc
+ insn_length(INSNCODE
));
10 // messy way to do it: insn_t is used elsewhere in a union,
11 // so cannot create virtual functions.
12 // a workaround is to grab the bits from the insn_t
13 // and create an sv-variant. also an opportunity to pass
14 // in a stack of other things that are needed.
15 insn_bits_t bits
= s_insn
.bits();
17 int vlen
= p
->get_state()->vl
;
18 // need to know if register is used as float or int.
19 // REGS_PATTERN is generated by id_regs.py (per opcode)
20 unsigned int floatintmap
= REGS_PATTERN
;
21 reg_t dest_pred
= ~0x0;
22 sv_insn_t
insn(p
, bits
, floatintmap
,
23 dest_pred
, dest_pred
, dest_pred
, dest_pred
);
25 #if defined(USING_REG_RD) || defined(USING_REG_FRD)
26 // use the ORIGINAL, i.e. NON-REDIRECTED, register here
27 dest_pred
= insn
.predicate(s_insn
.rd(), floatintmap
& REG_RD
, zeroing
);
29 // identify which regs have had their CSR entries set as vectorised.
30 // really could do with a macro for-loop here... oh well...
31 // integer ops, RD, RS1, RS2, RS3 (use sv_int_tb)
32 if (insn
.sv_check_reg(true, 16))
34 fprintf(stderr
, "reg %s %x rd %ld rs1 %ld rs2 %ld vlen %d\n",
35 xstr(INSN
), INSNCODE
, s_insn
.rd(), s_insn
.rs1(), s_insn
.rs2(),
38 // if vectorop is set, one of the regs is not a scalar,
39 // so we must read the VL CSR and do a loop
42 vlen
= 1; // minimum of one loop
44 for (int voffs
=0; voffs
< vlen
; voffs
++)
46 insn
.reset_vloop_check();
48 #if defined(USING_REG_RD) || defined(USING_REG_FRD)
49 if (zeroing
&& ((dest_pred
& (1<<voffs
)) == 0))
51 // insn._rd() would be predicated: have to use insn._rd() here
52 WRITE_REG(insn
._rd(), 0);
57 fprintf(stderr
, "reg %s %x vloop %d vlen %d stop %d pred %lx rd%lx\n",
58 xstr(INSN
), INSNCODE
, voffs
, vlen
, insn
.stop_vloop(),
59 dest_pred
& (1<<voffs
), READ_REG(insn
._rd()));
61 insn
.reset_caches(); // ready to increment offsets in next iteration
62 if (insn
.stop_vloop())
71 trace_opcode(p
, INSNCODE
, insn
);