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32-bit platform compatibility in Rust FFI (untested)

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j-berman 2024-08-08 13:38:45 -07:00
parent 10c6c12b18
commit 3a5cf70066
1 changed files with 6 additions and 4 deletions
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10
src/fcmp/fcmp_rust/fcmp++.h
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@ -8,8 +8,8 @@ namespace fcmp_pp_rust {
// ----- deps C bindings ----- // ----- deps C bindings -----
/// Inner integer type that the [`Limb`] newtype wraps. /// Inner integer type that the [`Limb`] newtype wraps.
// TODO: This is only valid for 64-bit platforms // TODO: test 32-bit platforms
using Word = uint64_t; using Word = uintptr_t;
/// Big integers are represented as an array of smaller CPU word-size integers /// Big integers are represented as an array of smaller CPU word-size integers
/// called "limbs". /// called "limbs".
@ -49,14 +49,16 @@ struct Residue {
/// A constant-time implementation of the Ed25519 field. /// A constant-time implementation of the Ed25519 field.
struct SeleneScalar { struct SeleneScalar {
Residue<4> _0; Residue<32 / sizeof(uintptr_t)> _0;
}; };
static_assert(sizeof(SeleneScalar) == 32, "unexpected size of selene scalar");
/// The field novel to Helios/Selene. /// The field novel to Helios/Selene.
struct HeliosScalar { struct HeliosScalar {
Residue<4> _0; Residue<32 / sizeof(uintptr_t)> _0;
}; };
static_assert(sizeof(HeliosScalar) == 32, "unexpected size of helios scalar");
struct HeliosPoint { struct HeliosPoint {
SeleneScalar x; SeleneScalar x;