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-rw-r--r--model/riscv_analysis.sail176
1 files changed, 176 insertions, 0 deletions
diff --git a/model/riscv_analysis.sail b/model/riscv_analysis.sail
index 34572f8..ec8c96f 100644
--- a/model/riscv_analysis.sail
+++ b/model/riscv_analysis.sail
@@ -10,6 +10,8 @@ let GPRstr : vector(32, dec, string) = [ "x31", "x30", "x29", "x28", "x27", "x26
let CIA_fp = RFull("CIA")
let NIA_fp = RFull("NIA")
+$ifndef FEATURE_UNION_BARRIER
+
function initial_analysis (instr:ast) -> (regfps,regfps,regfps,niafps,diafp,instruction_kind) = {
iR = [| |] : regfps;
oR = [| |] : regfps;
@@ -180,3 +182,177 @@ function initial_analysis (instr:ast) -> (regfps,regfps,regfps,niafps,diafp,inst
};
(iR,oR,aR,Nias,Dia,ik)
}
+
+$else
+
+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)
+}
+
+$endif
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