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Fix nonmatching MatchCall_MoveWindow function

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This commit is contained in:
Phlosioneer 2019-04-07 20:09:53 -04:00 committed by huderlem
parent a4ea0ac816
commit 29c986e21e
1 changed files with 15 additions and 94 deletions
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109
src/pokenav_match_call_ui.c
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@ -393,42 +393,33 @@ bool32 ShouldShowDownArrow(void)
return subPtr->windowTopIndex + subPtr->visibleEntries < subPtr->listLength;
}
#ifdef NONMATCHING
// This has some register renaming issues (r4, r5, and r6 are all switched around), and
// for some reason it's creating two copies of subPtr->unk0.
// TODO: Now I know why it's making two copies - one of them is UnknownInnerStruct_81C81D4.
void MatchCall_MoveWindow(s32 a0, bool32 a1)
void MatchCall_MoveWindow(s32 a0, bool32 a1_)
{
register bool32 a1 asm("r4")= a1_;
s32 v1;
struct MatchCallWindowState *subPtr;
struct UnknownSubStruct_81C81D4 *structPtr;
structPtr = GetSubstructPtr(0x11);
subPtr = &structPtr->unk888;
struct UnknownSubStruct_81C81D4 *structPtr = GetSubstructPtr(0x11);
register struct MatchCallWindowState *subPtr asm("r5") = &structPtr->unk888;
if (a0 < 0)
{
// This is where the issue is. subPtr->windowTopIndex is being stored in r1 and then copied to
// r2... and then r2 is read for the if statement, r1 is read for the function call,
// and then both are clobbered as expected. Between those two uses, no writes to r1/r2
// happen; it doesn't need to be duplicated/moved at all.
if (subPtr->windowTopIndex + a0 < 0)
v1 = -1 * subPtr->windowTopIndex;
u16 temp = subPtr->windowTopIndex;
if (temp + a0 < 0)
v1 = -1 * temp;
else
v1 = a0;
if (a1)
sub_81C83AC(subPtr->unk10, subPtr->windowTopIndex + v1, v1 * -1, subPtr->unkC, v1, structPtr);
sub_81C83AC(subPtr->unk10, temp + v1, v1 * -1, subPtr->unkC, v1, &structPtr->unk0);
}
else if (a1)
{
gUnknown_0203CF44 = subPtr->windowTopIndex + subPtr->visibleEntries;
if ((s32)(gUnknown_0203CF44) + a0 >= (s32)subPtr->listLength)
v1 = subPtr->listLength - gUnknown_0203CF44;
s32 temp = gUnknown_0203CF44 = subPtr->windowTopIndex + subPtr->visibleEntries;
s32 listLength;
if (temp + a0 >= (listLength = subPtr->listLength))
v1 = listLength - temp;
else
v1 = a0;
sub_81C83AC(subPtr->unk10, gUnknown_0203CF44, v1, subPtr->unkC, subPtr->visibleEntries, structPtr);
sub_81C83AC(subPtr->unk10, gUnknown_0203CF44, v1, subPtr->unkC, subPtr->visibleEntries, &structPtr->unk0);
// Needed to prevent GCC from combining the two sub_81C83AC calls.
asm("");
}
@ -437,79 +428,9 @@ void MatchCall_MoveWindow(s32 a0, bool32 a1)
v1 = a0;
}
sub_81C8568(v1, structPtr);
subPtr->windowTopIndex++;
sub_81C8568(v1, &structPtr->unk0);
subPtr->windowTopIndex += v1;
}
#else
NAKED
void MatchCall_MoveWindow(s32 a0, bool32 a1)
{
asm(".syntax unified\n\
push {r4-r7,lr}\n\
sub sp, 0x8\n\
adds r6, r0, 0\n\
adds r4, r1, 0\n\
movs r0, 0x11\n\
bl GetSubstructPtr\n\
adds r7, r0, 0\n\
ldr r0, =0x00000888\n\
adds r5, r7, r0\n\
cmp r6, 0\n\
bge _081C8524\n\
ldrh r1, [r5]\n\
adds r0, r1, r6\n\
cmp r0, 0\n\
bge _081C850A\n\
negs r6, r1\n\
_081C850A:\n\
cmp r4, 0\n\
beq _081C854E\n\
ldr r0, [r5, 0x10]\n\
adds r1, r6\n\
negs r2, r6\n\
ldr r3, [r5, 0xC]\n\
str r6, [sp]\n\
str r7, [sp, 0x4]\n\
bl sub_81C83AC\n\
b _081C854E\n\
.pool\n\
_081C8524:\n\
cmp r4, 0\n\
beq _081C854E\n\
ldr r2, =gUnknown_0203CF44\n\
ldrh r1, [r5]\n\
ldrh r0, [r5, 0x8]\n\
adds r4, r1, r0\n\
str r4, [r2]\n\
adds r0, r4, r6\n\
ldrh r1, [r5, 0x2]\n\
cmp r0, r1\n\
blt _081C853C\n\
subs r6, r1, r4\n\
_081C853C:\n\
ldr r0, [r5, 0x10]\n\
ldr r3, [r5, 0xC]\n\
ldrh r1, [r5, 0x8]\n\
str r1, [sp]\n\
str r7, [sp, 0x4]\n\
adds r1, r4, 0\n\
adds r2, r6, 0\n\
bl sub_81C83AC\n\
_081C854E:\n\
adds r0, r6, 0\n\
adds r1, r7, 0\n\
bl sub_81C8568\n\
ldrh r0, [r5]\n\
adds r0, r6\n\
strh r0, [r5]\n\
add sp, 0x8\n\
pop {r4-r7}\n\
pop {r0}\n\
bx r0\n\
.pool\n\
.syntax divided");
}
#endif
void sub_81C8568(s32 a0, struct UnknownInnerStruct_81C81D4 *a1)
{