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size optimized libload start #706

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size optimized libload start #706

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27 changes: 14 additions & 13 deletions src/libload/libload.asm
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Original file line number Diff line number Diff line change
Expand Up @@ -90,10 +90,6 @@ disable_relocations
call ti.MemClear
pop bc

ld a, (iy + LIB_FLAGS)
ld (flag_save), a
ld (ix_save), ix ; save IX since older ICE programs don't

ld hl, $AA55AA
xor a, a
sbc hl, bc
Expand All @@ -117,19 +113,11 @@ disable_relocations

ld (error_sp), sp

ld (iy + LIB_FLAGS), c ; C is zero here
; res is_dep, (iy + LIB_FLAGS)
; res optional, (iy + LIB_FLAGS)

ld a, (hl)
cp a, REQ_LIB_MARKER
jr z, start
set optional, (iy + LIB_FLAGS)
cp a, OPT_LIB_MARKER
jr z, start
ld a, (flag_save)
ld (iy + LIB_FLAGS), a ; restore flag bits
ld ix, (ix_save) ; restore IX register
jr z, start_optional
jp (hl) ; return to execution if there are no libs
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@ZERICO2005 ZERICO2005 Feb 11, 2026

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both ix and (iy + LIB_FLAGS) are unmodified here, so we do not need to restore them


macro relocate? name, address*
Expand Down Expand Up @@ -187,7 +175,20 @@ macro rload? name
dl name - $ - 3
end macro

start_optional:
; set optional, (iy + LIB_FLAGS)
ld c, 1 shl optional
start:
ld (ix_save), ix ; save IX since older ICE programs don't

ld a, (iy + LIB_FLAGS)
ld (flag_save), a
; initialize LIB_FLAGS
; REQ_LIB_MARKER --> C = 0
; OPT_LIB_MARKER --> C = (1 << optional)
ld (iy + LIB_FLAGS), c
; res is_dep, (iy + LIB_FLAGS)

push hl
call ti.PushOP1 ; save calling program name
pop hl
Expand Down
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