// FFI struct-marshalling baselines. Two shapes covered today:
//   Vec2  — 8 bytes  (two f32)         — register pair, float path
//   Vec4f — 16 bytes (four f32)        — homogeneous float aggregate (HFA)
// Declared here so the .c has a header to include; the sx side
// imports via `#source` only and re-declares the structs natively
// (c_import currently rewrites struct-typed params/returns to *void,
// which loses the by-value ABI).

typedef struct { float x; float y; } Vec2;
typedef struct { float x; float y; float z; float w; } Vec4f;

Vec2  ffi_vec2_make  (float x, float y);
Vec2  ffi_vec2_swap  (Vec2 v);
float ffi_vec2_sum   (Vec2 v);

Vec4f ffi_vec4f_make   (float x, float y, float z, float w);
Vec4f ffi_vec4f_reverse(Vec4f v);
float ffi_vec4f_sum    (Vec4f v);