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$include <regfp.sail>
/* in reverse order because inc vectors don't seem to work (bug) */
let GPRstr : vector(32, dec, string) = [ "x31", "x30", "x29", "x28", "x27", "x26", "x25", "x24", "x23", "x22", "x21",
"x20", "x19", "x18", "x17", "x16", "x15", "x14", "x13", "x12", "x11",
"x10", "x9", "x8", "x7", "x6", "x5", "x4", "x3", "x2", "x1", "x0"
]
let CIA_fp = RFull("CIA")
let NIA_fp = RFull("NIA")
function initial_analysis (instr:ast) -> (regfps,regfps,regfps,niafps,diafp,instruction_kind) = {
iR = [| |] : regfps;
oR = [| |] : regfps;
aR = [| |] : regfps;
ik = IK_simple() : instruction_kind;
Nias = [| NIAFP_successor() |] : niafps;
Dia = DIAFP_none() : diafp;
match instr {
EBREAK() => (),
UTYPE(imm, rd, op) => {
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
RISCV_JAL(imm, rd) => {
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
let offset : bits(64) = EXTS(imm) in
Nias = [| NIAFP_concrete_address (PC + offset) |];
ik = IK_branch();
},
RISCV_JALR(imm, rs, rd) => {
if (rs == 0) then () else iR = RFull(GPRstr[rs]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
let offset : bits(64) = EXTS(imm) in
Nias = [| NIAFP_indirect_address() |];
ik = IK_branch();
},
BTYPE(imm, rs2, rs1, op) => {
if (rs2 == 0) then () else iR = RFull(GPRstr[rs2]) :: iR;
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
ik = IK_branch();
let offset : bits(64) = EXTS(imm) in
Nias = [| NIAFP_concrete_address(PC + offset), NIAFP_successor() |];
},
ITYPE(imm, rs, rd, op) => {
if (rs == 0) then () else iR = RFull(GPRstr[rs]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
SHIFTIOP(imm, rs, rd, op) => {
if (rs == 0) then () else iR = RFull(GPRstr[rs]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
RTYPE(rs2, rs1, rd, op) => {
if (rs2 == 0) then () else iR = RFull(GPRstr[rs2]) :: iR;
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
CSR(csr, rs1, rd, is_imm, op) => {
let isWrite : bool = match op {
CSRRW => true,
_ => if is_imm then unsigned(rs1) != 0 else unsigned(rs1) != 0
};
iR = RFull(csr_name(csr)) :: iR;
if ~(is_imm) then {
iR = RFull(GPRstr[rs1]) :: iR;
};
if isWrite then {
oR = RFull(csr_name(csr)) :: oR;
};
oR = RFull(GPRstr[rd]) :: oR;
},
LOAD(imm, rs, rd, unsign, width, aq, rl) => { /* XXX "unsigned" causes name conflict in lem shallow embedding... */
if (rs == 0) then () else iR = RFull(GPRstr[rs]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
aR = iR;
ik =
match (aq, rl) {
(false, false) => IK_mem_read (Read_plain),
(true, false) => IK_mem_read (Read_RISCV_acquire),
(true, true) => IK_mem_read (Read_RISCV_strong_acquire),
_ => internal_error("LOAD type not implemented in initial_analysis")
}
},
STORE(imm, rs2, rs1, width, aq, rl) => {
if (rs2 == 0) then () else iR = RFull(GPRstr[rs2]) :: iR;
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
if (rs1 == 0) then () else aR = RFull(GPRstr[rs1]) :: aR;
ik =
match (aq, rl) {
(false, false) => IK_mem_write (Write_plain),
(false, true) => IK_mem_write (Write_RISCV_release),
(true, true) => IK_mem_write (Write_RISCV_strong_release),
_ => internal_error("STORE type not implemented in initial_analysis")
}
},
ADDIW(imm, rs, rd) => {
if (rs == 0) then () else iR = RFull(GPRstr[rs]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
SHIFTW(imm, rs, rd, op) => {
if (rs == 0) then () else iR = RFull(GPRstr[rs]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
RTYPEW(rs2, rs1, rd, op) => {
if (rs2 == 0) then () else iR = RFull(GPRstr[rs2]) :: iR;
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
},
FENCE(pred, succ) => {
ik =
match (pred, succ) {
(_ : bits(2) @ 0b11, _ : bits(2) @ 0b11) => IK_barrier (Barrier_RISCV_rw_rw),
(_ : bits(2) @ 0b10, _ : bits(2) @ 0b11) => IK_barrier (Barrier_RISCV_r_rw),
(_ : bits(2) @ 0b10, _ : bits(2) @ 0b10) => IK_barrier (Barrier_RISCV_r_r),
(_ : bits(2) @ 0b11, _ : bits(2) @ 0b01) => IK_barrier (Barrier_RISCV_rw_w),
(_ : bits(2) @ 0b01, _ : bits(2) @ 0b01) => IK_barrier (Barrier_RISCV_w_w),
(_ : bits(2) @ 0b01, _ : bits(2) @ 0b11) => IK_barrier (Barrier_RISCV_w_rw),
(_ : bits(2) @ 0b11, _ : bits(2) @ 0b10) => IK_barrier (Barrier_RISCV_rw_r),
(_ : bits(2) @ 0b10, _ : bits(2) @ 0b01) => IK_barrier (Barrier_RISCV_r_w),
(_ : bits(2) @ 0b01, _ : bits(2) @ 0b10) => IK_barrier (Barrier_RISCV_w_r),
(_ : bits(2) @ 0b00, _ : bits(2) @ 0b00) => IK_simple (),
_ => internal_error("barrier type not implemented in initial_analysis")
};
},
FENCE_TSO(pred, succ) => {
ik =
match (pred, succ) {
(_ : bits(2) @ 0b11, _ : bits(2) @ 0b11) => IK_barrier (Barrier_RISCV_tso),
_ => internal_error("barrier type not implemented in initial_analysis")
};
},
FENCEI() => {
ik = IK_simple (); // for RMEM, should morally be Barrier_RISCV_i
},
LOADRES(aq, rl, rs1, width, rd) => {
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
aR = iR;
ik = match (aq, rl) {
(false, false) => IK_mem_read (Read_RISCV_reserved),
(true, false) => IK_mem_read (Read_RISCV_reserved_acquire),
(true, true) => IK_mem_read (Read_RISCV_reserved_strong_acquire),
(false, true) => internal_error("LOADRES type not implemented in initial_analysis")
};
},
STORECON(aq, rl, rs2, rs1, width, rd) => {
if (rs2 == 0) then () else iR = RFull(GPRstr[rs2]) :: iR;
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
if (rs1 == 0) then () else aR = RFull(GPRstr[rs1]) :: aR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
ik = match (aq, rl) {
(false, false) => IK_mem_write (Write_RISCV_conditional),
(false, true) => IK_mem_write (Write_RISCV_conditional_release),
(true, true) => IK_mem_write (Write_RISCV_conditional_strong_release),
(true, false) => internal_error("STORECON type not implemented in initial_analysis")
};
},
AMO(op, aq, rl, rs2, rs1, width, rd) => {
if (rs2 == 0) then () else iR = RFull(GPRstr[rs2]) :: iR;
if (rs1 == 0) then () else iR = RFull(GPRstr[rs1]) :: iR;
if (rs1 == 0) then () else aR = RFull(GPRstr[rs1]) :: aR;
if (rd == 0) then () else oR = RFull(GPRstr[rd]) :: oR;
ik = match (aq, rl) {
(false, false) => IK_mem_rmw (Read_RISCV_reserved, Write_RISCV_conditional),
(false, true) => IK_mem_rmw (Read_RISCV_reserved, Write_RISCV_conditional_release),
(true, false) => IK_mem_rmw (Read_RISCV_reserved_acquire,
Write_RISCV_conditional),
(true, true) => IK_mem_rmw (Read_RISCV_reserved_acquire,
Write_RISCV_conditional_release)
};
},
_ => ()
};
(iR,oR,aR,Nias,Dia,ik)
}
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