No autocast result to function definition

[Dark-Schneider-666]

I have this definitions:
typedef uint8_t bool;
extern bool collide_check_u16(uint16_t x, uint16_t y, Rectangle_u16 *collision) __smallc __z88dk_callee;
The returning values is like:

collide_return_false:
    ld l, 0
    ret
collide_return_true:
    ld l, 1
    ret

When doing something like:
collide_draw_set(collide_check_u16(100, 90, &rect2) ? 8 : 7);
It uses also the value at register H, so getting incorrect behavior, if instead I do:
collide_draw_set((bool)collide_check_u16(100, 90, &rect2) ? 8 : 7);
Works normally, using only register L.

If I set returning values like:

collide_return_false:
    ld hl, 0
    ret
collide_return_true:
    ld hl, 1
    ret

Then works with the 1st calling method, but is supposed to be an 8-bit returning value.

[suborb]

I think this is another manifestation of #2216

[Dark-Schneider-666]

I am using SmallC, should have indicated at title.

[suborb]

Ah, in that case it's working as expected: https://github.com/z88dk/z88dk/wiki/CallingConventions - return values with __smallc are in hl, or dehl

[Dark-Schneider-666]

Then I have to revise some of my asm code.

Thanks.