Decompile crcCalculateU16Pair
This commit is contained in:
Ryan Dwyer
parent
383600ac49
commit
1d185c52e3
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@ -95,94 +95,27 @@ glabel func0f128f30
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/* f129068: 27bd0058 */ addiu $sp,$sp,0x58
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);
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GLOBAL_ASM(
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glabel func0f12906c
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/* f12906c: 27bdffa8 */ addiu $sp,$sp,-88
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/* f129070: 3c0e8f80 */ lui $t6,0x8f80
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/* f129074: 3c0f3108 */ lui $t7,0x3108
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/* f129078: afb50028 */ sw $s5,0x28($sp)
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/* f12907c: afb40024 */ sw $s4,0x24($sp)
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/* f129080: afb30020 */ sw $s3,0x20($sp)
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/* f129084: afb10018 */ sw $s1,0x18($sp)
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/* f129088: afb00014 */ sw $s0,0x14($sp)
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/* f12908c: 35efb3c1 */ ori $t7,$t7,0xb3c1
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/* f129090: 35ce9f47 */ ori $t6,$t6,0x9f47
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/* f129094: 0085082b */ sltu $at,$a0,$a1
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/* f129098: 00a0a825 */ or $s5,$a1,$zero
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/* f12909c: afbf002c */ sw $ra,0x2c($sp)
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/* f1290a0: afb2001c */ sw $s2,0x1c($sp)
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/* f1290a4: afa60060 */ sw $a2,0x60($sp)
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/* f1290a8: 00803825 */ or $a3,$a0,$zero
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/* f1290ac: 00008825 */ or $s1,$zero,$zero
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/* f1290b0: afae0048 */ sw $t6,0x48($sp)
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/* f1290b4: afaf004c */ sw $t7,0x4c($sp)
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/* f1290b8: 00009825 */ or $s3,$zero,$zero
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/* f1290bc: 0000a025 */ or $s4,$zero,$zero
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/* f1290c0: 10200016 */ beqz $at,.L0f12911c
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/* f1290c4: 00808025 */ or $s0,$a0,$zero
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/* f1290c8: afa40058 */ sw $a0,0x58($sp)
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/* f1290cc: 27b20048 */ addiu $s2,$sp,0x48
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.L0f1290d0:
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/* f1290d0: 92180000 */ lbu $t8,0x0($s0)
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/* f1290d4: 8fad004c */ lw $t5,0x4c($sp)
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/* f1290d8: 3239000f */ andi $t9,$s1,0xf
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/* f1290dc: 03384004 */ sllv $t0,$t8,$t9
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/* f1290e0: 8fac0048 */ lw $t4,0x48($sp)
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/* f1290e4: 010d7821 */ addu $t7,$t0,$t5
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/* f1290e8: 000857c3 */ sra $t2,$t0,0x1f
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/* f1290ec: 01ed082b */ sltu $at,$t7,$t5
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/* f1290f0: 002a7021 */ addu $t6,$at,$t2
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/* f1290f4: 01cc7021 */ addu $t6,$t6,$t4
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/* f1290f8: afae0048 */ sw $t6,0x48($sp)
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/* f1290fc: afaf004c */ sw $t7,0x4c($sp)
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/* f129100: 0c004b87 */ jal func00012e1c
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/* f129104: 02402025 */ or $a0,$s2,$zero
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/* f129108: 26100001 */ addiu $s0,$s0,0x1
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/* f12910c: 26310007 */ addiu $s1,$s1,0x7
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/* f129110: 1615ffef */ bne $s0,$s5,.L0f1290d0
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/* f129114: 02629826 */ xor $s3,$s3,$v0
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/* f129118: 8fa70058 */ lw $a3,0x58($sp)
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.L0f12911c:
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/* f12911c: 26b0ffff */ addiu $s0,$s5,-1
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/* f129120: 0207082b */ sltu $at,$s0,$a3
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/* f129124: 14200014 */ bnez $at,.L0f129178
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/* f129128: 27b20048 */ addiu $s2,$sp,0x48
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/* f12912c: 24f5ffff */ addiu $s5,$a3,-1
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.L0f129130:
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/* f129130: 92090000 */ lbu $t1,0x0($s0)
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/* f129134: 8fab004c */ lw $t3,0x4c($sp)
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/* f129138: 3238000f */ andi $t8,$s1,0xf
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/* f12913c: 0309c804 */ sllv $t9,$t1,$t8
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/* f129140: 8faa0048 */ lw $t2,0x48($sp)
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/* f129144: 032b6821 */ addu $t5,$t9,$t3
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/* f129148: 001947c3 */ sra $t0,$t9,0x1f
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/* f12914c: 01ab082b */ sltu $at,$t5,$t3
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/* f129150: 00286021 */ addu $t4,$at,$t0
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/* f129154: 018a6021 */ addu $t4,$t4,$t2
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/* f129158: afac0048 */ sw $t4,0x48($sp)
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/* f12915c: afad004c */ sw $t5,0x4c($sp)
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/* f129160: 0c004b87 */ jal func00012e1c
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/* f129164: 02402025 */ or $a0,$s2,$zero
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/* f129168: 2610ffff */ addiu $s0,$s0,-1
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/* f12916c: 26310003 */ addiu $s1,$s1,0x3
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/* f129170: 1615ffef */ bne $s0,$s5,.L0f129130
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/* f129174: 0282a026 */ xor $s4,$s4,$v0
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.L0f129178:
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/* f129178: 8faf0060 */ lw $t7,0x60($sp)
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/* f12917c: 02607025 */ or $t6,$s3,$zero
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/* f129180: 0280c025 */ or $t8,$s4,$zero
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/* f129184: a5ee0000 */ sh $t6,0x0($t7)
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/* f129188: a5f80002 */ sh $t8,0x2($t7)
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/* f12918c: 8fbf002c */ lw $ra,0x2c($sp)
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/* f129190: 8fb50028 */ lw $s5,0x28($sp)
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/* f129194: 8fb40024 */ lw $s4,0x24($sp)
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/* f129198: 8fb30020 */ lw $s3,0x20($sp)
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/* f12919c: 8fb2001c */ lw $s2,0x1c($sp)
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/* f1291a0: 8fb10018 */ lw $s1,0x18($sp)
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/* f1291a4: 8fb00014 */ lw $s0,0x14($sp)
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/* f1291a8: 03e00008 */ jr $ra
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/* f1291ac: 27bd0058 */ addiu $sp,$sp,0x58
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);
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void crcCalculateU16Pair(u8 *start, u8 *end, u16 *checksum)
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{
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u8 *ptr;
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u32 salt = 0;
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u64 seed = 0x8f809f473108b3c1;
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u32 sum1 = 0;
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u32 sum2 = 0;
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for (ptr = start; ptr < end; ptr++, salt += 7) {
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seed += *ptr << (salt & 0x0f);
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sum1 ^= func00012e1c(&seed);
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}
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for (ptr = end - 1; ptr >= start; ptr--, salt += 3) {
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seed += *ptr << (salt & 0x0f);
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sum2 ^= func00012e1c(&seed);
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}
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checksum[0] = sum1 & 0xffff;
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checksum[1] = sum2 & 0xffff;
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}
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GLOBAL_ASM(
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glabel func0f1291b0
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@ -3262,7 +3262,7 @@ const char var7f1ae6f4nb[] = "dumpeeprom";
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void pakCalculateChecksum(u8 *start, u8 *end, u16 *checksum)
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{
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func0f12906c(start, end, checksum);
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crcCalculateU16Pair(start, end, checksum);
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}
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#if VERSION >= VERSION_NTSC_1_0
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@ -5,7 +5,7 @@
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#include "types.h"
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u32 func0f128f30(void);
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void func0f12906c(u8 *start, u8 *end, u16 *checksum);
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void crcCalculateU16Pair(u8 *start, u8 *end, u16 *checksum);
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u32 func0f1291b0(void);
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u32 func0f1291f8(void);
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