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54 lines
968 B
ArmAsm
54 lines
968 B
ArmAsm
.include "asm/macros.inc"
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.include "main_02001B0C.inc"
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.text
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; https://decomp.me/scratch/CGSpp
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arm_func_start UMultiplyByFixedPoint
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UMultiplyByFixedPoint: ; 0x02001B0C
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stmdb sp!, {r3, r4, r5, lr}
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cmp r0, #0
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moveq r0, #0
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ldmeqia sp!, {r3, r4, r5, pc}
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cmp r1, #0
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moveq r0, #0
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ldmeqia sp!, {r3, r4, r5, pc}
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mov r3, #0
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mov r2, r3
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mov ip, r3
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mov lr, r3
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mov r4, r3
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_02001B3C:
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mov r5, lr
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tst r1, #1
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beq _02001B58
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add lr, lr, r0
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add ip, ip, r3
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cmp r5, lr
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addhi ip, ip, #1
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_02001B58:
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mov r1, r1, lsr #1
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tst r2, #1
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orrne r1, r1, #0x80000000
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mov r2, r2, lsr #1
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tst r0, #0x80000000
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mov r3, r3, lsl #1
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mov r0, r0, lsl #1
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add r4, r4, #1
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orrne r3, r3, #1
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bic r2, r2, #0x80000000
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cmp r4, #0x40
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bic r0, r0, #1
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blt _02001B3C
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mov r0, lr, lsr #8
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tst lr, #0x80
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movne r1, #1
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bic r0, r0, #0xff000000
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moveq r1, #0
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orr lr, r0, ip, lsl #24
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tst r1, #0xff
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addne lr, lr, #1
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mov r0, lr
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ldmia sp!, {r3, r4, r5, pc}
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arm_func_end UMultiplyByFixedPoint
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