through sub_8151574

asm/math_util.s

@@ -5,80 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_8151534
-sub_8151534: @ 8151534
-	push {lr}
-	lsls r0, 16
-	asrs r0, 16
-	lsls r1, 16
-	asrs r1, 16
-	muls r0, r1
-	adds r1, r0, 0
-	cmp r0, 0
-	bge _08151548
-	adds r1, 0xFF
-_08151548:
-	lsls r0, r1, 8
-	asrs r0, 16
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8151534
-
-	thumb_func_start sub_8151550
-sub_8151550: @ 8151550
-	push {lr}
-	adds r3, r1, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r3, 16
-	asrs r3, 16
-	lsls r2, 16
-	asrs r2, 16
-	muls r3, r2
-	movs r1, 0x1
-	lsls r1, r0
-	adds r0, r3, 0
-	bl __divsi3
-	lsls r0, 16
-	asrs r0, 16
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8151550
-
-	thumb_func_start sub_8151574
-sub_8151574: @ 8151574
-	push {r4-r7,lr}
-	adds r2, r1, 0
-	adds r4, r0, 0
-	asrs r5, r0, 31
-	asrs r3, r2, 31
-	adds r1, r5, 0
-	adds r0, r4, 0
-	bl __muldi3
-	adds r5, r1, 0
-	adds r4, r0, 0
-	adds r7, r5, 0
-	adds r6, r4, 0
-	cmp r5, 0
-	bge _0815159A
-	movs r6, 0xFF
-	movs r7, 0
-	adds r6, r4
-	adcs r7, r5
-_0815159A:
-	lsls r3, r7, 24
-	lsrs r2, r6, 8
-	adds r0, r3, 0
-	orrs r0, r2
-	asrs r1, r7, 8
-	adds r5, r1, 0
-	adds r4, r0, 0
-	adds r0, r4, 0
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8151574
-
 	thumb_func_start sub_81515B0
 sub_81515B0: @ 81515B0
 	push {lr}

ld_script.txt

@@ -191,6 +191,7 @@ SECTIONS {
         asm/battle_controller_linkpartner.o(.text);
         src/battle_message.o(.text);
         asm/cable_car.o(.text);
+        src/math_util.o(.text);
         asm/math_util.o(.text);
         asm/roulette_util.o(.text);
         asm/cable_car_util.o(.text);

src/math_util.c

@@ -0,0 +1,43 @@
+
+// Includes
+#include "global.h"
+
+// Static type declarations
+
+// Static RAM declarations
+
+// Static ROM declarations
+
+// .rodata
+
+// .text
+
+s16 sub_8151534(s16 x, s16 y)
+{
+    s32 result;
+
+    result = x;
+    result *= y;
+    result /= 256;
+    return result;
+}
+
+s16 sub_8151550(u8 s, s16 x, s16 y)
+{
+    s32 result;
+
+    result = x;
+    result *= y;
+    result /= (1 << s);
+    return result;
+}
+
+s32 sub_8151574(s32 x, s32 y)
+{
+    s64 result;
+
+    result = x;
+    result *= y;
+    result /= 256;
+    return result;
+}