donut-decomp/asm/os/OSCrc.s

.include "macros.inc"

.section .text, "ax"  # 0x80006A00 - 0x80406260
.global OSCalcCRC32
OSCalcCRC32:
/* 800281E0 00024020  2C 04 00 00 */	cmpwi r4, 0
/* 800281E4 00024024  3C E0 80 40 */	lis r7, $$2LOCAL$$2OSCalcCRC32__FPCvUl$$2crc32_table@ha
/* 800281E8 00024028  39 00 FF FF */	li r8, -1
/* 800281EC 0002402C  38 E7 78 00 */	addi r7, r7, $$2LOCAL$$2OSCalcCRC32__FPCvUl$$2crc32_table@l
/* 800281F0 00024030  41 82 01 1C */	beq lbl_8002830C
/* 800281F4 00024034  54 80 F0 BF */	rlwinm. r0, r4, 0x1e, 2, 0x1f
/* 800281F8 00024038  7C 09 03 A6 */	mtctr r0
/* 800281FC 0002403C  41 82 00 D4 */	beq lbl_800282D0
lbl_80028200:
/* 80028200 00024040  89 23 00 00 */	lbz r9, 0(r3)
/* 80028204 00024044  55 06 E1 3E */	srwi r6, r8, 4
/* 80028208 00024048  7D 00 4A 78 */	xor r0, r8, r9
/* 8002820C 0002404C  55 25 E1 3E */	srwi r5, r9, 4
/* 80028210 00024050  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 80028214 00024054  89 23 00 01 */	lbz r9, 1(r3)
/* 80028218 00024058  7C 07 00 2E */	lwzx r0, r7, r0
/* 8002821C 0002405C  7C C6 02 78 */	xor r6, r6, r0
/* 80028220 00024060  7C C0 2A 78 */	xor r0, r6, r5
/* 80028224 00024064  55 25 E1 3E */	srwi r5, r9, 4
/* 80028228 00024068  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 8002822C 0002406C  54 C6 E1 3E */	srwi r6, r6, 4
/* 80028230 00024070  7C 07 00 2E */	lwzx r0, r7, r0
/* 80028234 00024074  7C C8 02 78 */	xor r8, r6, r0
/* 80028238 00024078  7D 00 4A 78 */	xor r0, r8, r9
/* 8002823C 0002407C  89 23 00 02 */	lbz r9, 2(r3)
/* 80028240 00024080  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 80028244 00024084  55 06 E1 3E */	srwi r6, r8, 4
/* 80028248 00024088  7C 07 00 2E */	lwzx r0, r7, r0
/* 8002824C 0002408C  7C C6 02 78 */	xor r6, r6, r0
/* 80028250 00024090  7C C0 2A 78 */	xor r0, r6, r5
/* 80028254 00024094  55 25 E1 3E */	srwi r5, r9, 4
/* 80028258 00024098  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 8002825C 0002409C  54 C6 E1 3E */	srwi r6, r6, 4
/* 80028260 000240A0  7C 07 00 2E */	lwzx r0, r7, r0
/* 80028264 000240A4  7C C8 02 78 */	xor r8, r6, r0
/* 80028268 000240A8  7D 00 4A 78 */	xor r0, r8, r9
/* 8002826C 000240AC  89 23 00 03 */	lbz r9, 3(r3)
/* 80028270 000240B0  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 80028274 000240B4  55 06 E1 3E */	srwi r6, r8, 4
/* 80028278 000240B8  7C 07 00 2E */	lwzx r0, r7, r0
/* 8002827C 000240BC  38 63 00 04 */	addi r3, r3, 4
/* 80028280 000240C0  7C C6 02 78 */	xor r6, r6, r0
/* 80028284 000240C4  7C C0 2A 78 */	xor r0, r6, r5
/* 80028288 000240C8  55 25 E1 3E */	srwi r5, r9, 4
/* 8002828C 000240CC  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 80028290 000240D0  54 C6 E1 3E */	srwi r6, r6, 4
/* 80028294 000240D4  7C 07 00 2E */	lwzx r0, r7, r0
/* 80028298 000240D8  7C C8 02 78 */	xor r8, r6, r0
/* 8002829C 000240DC  7D 00 4A 78 */	xor r0, r8, r9
/* 800282A0 000240E0  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 800282A4 000240E4  55 06 E1 3E */	srwi r6, r8, 4
/* 800282A8 000240E8  7C 07 00 2E */	lwzx r0, r7, r0
/* 800282AC 000240EC  7C C6 02 78 */	xor r6, r6, r0
/* 800282B0 000240F0  7C C0 2A 78 */	xor r0, r6, r5
/* 800282B4 000240F4  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 800282B8 000240F8  54 C6 E1 3E */	srwi r6, r6, 4
/* 800282BC 000240FC  7C 07 00 2E */	lwzx r0, r7, r0
/* 800282C0 00024100  7C C8 02 78 */	xor r8, r6, r0
/* 800282C4 00024104  42 00 FF 3C */	bdnz lbl_80028200
/* 800282C8 00024108  70 84 00 03 */	andi. r4, r4, 3
/* 800282CC 0002410C  41 82 00 40 */	beq lbl_8002830C
lbl_800282D0:
/* 800282D0 00024110  7C 89 03 A6 */	mtctr r4
lbl_800282D4:
/* 800282D4 00024114  89 23 00 00 */	lbz r9, 0(r3)
/* 800282D8 00024118  55 06 E1 3E */	srwi r6, r8, 4
/* 800282DC 0002411C  38 63 00 01 */	addi r3, r3, 1
/* 800282E0 00024120  7D 00 4A 78 */	xor r0, r8, r9
/* 800282E4 00024124  55 25 E1 3E */	srwi r5, r9, 4
/* 800282E8 00024128  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 800282EC 0002412C  7C 07 00 2E */	lwzx r0, r7, r0
/* 800282F0 00024130  7C C6 02 78 */	xor r6, r6, r0
/* 800282F4 00024134  7C C0 2A 78 */	xor r0, r6, r5
/* 800282F8 00024138  54 00 16 BA */	rlwinm r0, r0, 2, 0x1a, 0x1d
/* 800282FC 0002413C  54 C6 E1 3E */	srwi r6, r6, 4
/* 80028300 00024140  7C 07 00 2E */	lwzx r0, r7, r0
/* 80028304 00024144  7C C8 02 78 */	xor r8, r6, r0
/* 80028308 00024148  42 00 FF CC */	bdnz lbl_800282D4
lbl_8002830C:
/* 8002830C 0002414C  7D 03 40 F8 */	nor r3, r8, r8
/* 80028310 00024150  4E 80 00 20 */	blr 
/* 80028314 00024154  00 00 00 00 */	.4byte 0x00000000  /* unknown instruction */
/* 80028318 00024158  00 00 00 00 */	.4byte 0x00000000  /* unknown instruction */
/* 8002831C 0002415C  00 00 00 00 */	.4byte 0x00000000  /* unknown instruction */

.section .rodata, "wa"  # 0x80406560 - 0x80421040
.global $$2LOCAL$$2OSCalcCRC32__FPCvUl$$2crc32_table
$$2LOCAL$$2OSCalcCRC32__FPCvUl$$2crc32_table:
	.incbin "baserom.dol", 0x403900, 0x40