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default Order dec
$include <prelude.sail>
$include <smt.sail>
val "extz_vec" : forall 'n 'm. (atom('m),bitvector('n, dec)) -> bitvector('m, dec) effect pure
val extzv : forall 'n 'm. (implicit('m), bitvector('n, dec)) -> bitvector('m, dec) effect pure
function extzv(m, v) = extz_vec(m,v)
val bitvector_cast_in = "zeroExtend" : forall 'n. bits('n) -> bits('n) effect pure
val bitvector_cast_out = "zeroExtend" : forall 'n. bits('n) -> bits('n) effect pure
val bitvector_length = "length" : forall 'n. bits('n) -> atom('n)
overload length = {bitvector_length}
overload __size = {length}
/* Test generation of casts across case splits (e.g., going from bits('m) to bits(32)) */
val foo : forall 'm 'n, 'm in {8,16} & 'n in {32,64}. (implicit('n), bits('m)) -> bits('n) effect pure
function foo(n, x) =
let y : bits(16) = extzv(x) in
match 'n {
32 => y@y,
64 => let z = y@y@y@y in let dfsf = 4 in z
}
val foo_if : forall 'm 'n, 'm in {8,16} & 'n in {32,64}. (implicit('n), bits('m)) -> bits('n) effect pure
function foo_if(n, x) =
let y : bits(16) = extzv(x) in
if n == 32
then y@y
else /* 64 */ let z = y@y@y@y in let dfsf = 4 in z
val use : bits(16) -> unit effect pure
function use(x) = ()
val bar : forall 'n, 'n in {8,16}. bits('n) -> unit effect pure
function bar(x) =
match 'n {
8 => use(x@x),
16 => use(x)
}
val bar_if : forall 'n, 'n in {8,16}. bits('n) -> unit effect pure
function bar_if(x) =
if 'n == 8
then use(x@x)
else /* 16 */ use(x)
val ret : forall 'm 'n, 'm in {8,16} & 'n in {32,64}. (implicit('n), bits('m)) -> bits('n) effect {undef}
function ret(n, x) =
let y : bits(16) = extzv(x) in
match 'n {
32 => return y@y,
64 => let z = y@y@y@y in { dfsf = 4; return z; undefined }
}
val assign : forall 'm 'n, 'm in {8,16} & 'n in {32,64}. (implicit('n), bits('m)) -> bits('n) effect {undef}
function assign(n, x) = {
let y : bits(16) = extzv(x);
r : bits('n) = undefined;
match 'n {
32 => r = y@y,
64 => { let z = y@y@y@y; let dfsf = 4; r = z }
};
r
}
val assign2 : forall 'm, 'm in {8,16}. bits('m) -> bits(32)
function assign2(x) = {
y : bits('m) = x;
r : bits(32) = 0x00000000;
match 'm {
8 => { y = y + 0x01; r = extzv(y) },
16 => r = extzv(y)
};
r
}
val assign3 : forall 'm, 'm in {8,16}. bits('m) -> bits('m)
function assign3(x) = {
y : bits('m) = x;
match 'm {
8 => y = y + 0x01,
16 => y[7..0] = 0x89
};
y
}
/* Test that matching on a variable which happens to fix a bitvector variable's
size updates the environment properly. */
val assign4 : forall 'm, 'm in {1,2}. (implicit('m),bits(8*'m)) -> bits(8*'m)
function assign4(m,x) = {
y : bits(8*'m) = x;
match m {
1 => y = y + 0x01,
2 => y[7..0] = 0x89
};
y
}
/* The same as assign4, except with a distinct type variable. */
val assign5 : forall 'm 'n, 'm in {1,2} & 'n == 8 * 'm. (implicit('m),bits('n)) -> bits('n)
function assign5(m,x) = {
y : bits('n) = x;
match m {
1 => y = y + 0x01,
2 => y[7..0] = 0x89
};
y
}
/* Adding casts for top-level pattern matches */
val foo2 : forall 'm 'n, 'm in {8,16} & 'n in {32,64}. (atom('n), bits('m)) -> bits('n) effect pure
function foo2(32,x) =
let y : bits(16) = extzv(x) in
y@y
and foo2(64,x) =
let y : bits(16) = extzv(x) in
let z = y@y@y@y in let dfsf = 4 in z
val foo3 : forall 'm 'n, 'n in {4,8}. (atom('n), bits('m)) -> bits(8 * 'n) effect pure
function foo3(4,x) =
let y : bits(16) = extzv(x) in
y@y
and foo3(8,x) =
let y : bits(16) = extzv(x) in
let z = y@y@y@y in let dfsf = 4 in z
/* Casting an argument isn't supported yet
val bar2 : forall 'n, 'n in {8,16}. (atom('n),bits('n)) -> unit effect pure
function bar2(8,x) =
use(x@x)
and bar2(16,x) =
use(x)
*/
val run : unit -> unit effect {escape,undef}
function run () = {
bar(0x12);
bar(0x3456);
assert((ret(0x34) : bits(32)) == 0x00340034);
assert((ret(0x34) : bits(64)) == 0x0034003400340034);
assert((ret(0x3456) : bits(32)) == 0x34563456);
assert((ret(0x3456) : bits(64)) == 0x3456345634563456);
assert((assign(0x12) : bits(32)) == 0x00120012);
assert((assign(0x1234) : bits(32)) == 0x12341234);
assert((assign(0x12) : bits(64)) == 0x0012001200120012);
assert((assign(0x1234) : bits(64)) == 0x1234123412341234);
assert(assign2(0x12) == 0x00000013);
assert(assign2(0x1234) == 0x00001234);
assert(assign3(0x12) == 0x13);
assert(assign3(0x1234) == 0x1289);
assert(assign4(0x12) == 0x13);
assert(assign4(0x1234) == 0x1289);
assert(assign5(0x12) == 0x13);
assert(assign5(0x1234) == 0x1289);
assert(foo2(32,0x12) == 0x00120012);
assert(foo2(64,0x12) == 0x0012001200120012);
assert(foo3(4,0x12) == 0x00120012);
assert(foo3(8,0x12) == 0x0012001200120012);
}
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