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Improve hsd_803B51C8 matching #3083

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3cc1e27
Improve hsd_803B51C8 matching
Aug 14, 2026
664ec55
Refine hsd_803B51C8 register allocation
Aug 14, 2026
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111 changes: 62 additions & 49 deletions src/sysdolphin/baselib/hsd_3B34.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,18 @@ typedef union JpegMetadata {
} data;
} JpegMetadata;

typedef struct HuffAcTable {
u8 data[0xB2];
} HuffAcTable;

typedef struct JpegComment {
char data[0x15];
} JpegComment;

typedef struct HuffDcTable {
u8 data[0x1C];
} HuffDcTable;

static const JpegMetadata lbl_803B9670 = { {
0x48, 0x41, 0x4C, 0x20, 0x4C, 0x61, 0x62, 0x6F, 0x72, 0x61, 0x74, 0x6F,
0x72, 0x79, 0x2C, 0x20, 0x49, 0x6E, 0x63, 0x2E, 0x00, 0x00, 0x00, 0x00,
Expand Down Expand Up @@ -1371,17 +1383,17 @@ void hsd_803B4D64(u32 arg0, u32 arg1)

s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
{
char comment[0x15];
u8 huff_dc_luma[0x1C];
u8 huff_dc_chroma[0x1C];
u8 huff_ac_luma[0xB2];
JpegComment comment;
HuffDcTable huff_dc_luma;
HuffDcTable huff_dc_chroma;
HuffAcTable huff_ac_luma;
u8* work_r26_2;
s32 scratch_r6_4;
s32 scratch_r6_5;
s32 scratch_r7_2;
s32 scratch_r7_4;
s32 work_r24;
s32 work_r25;
s32 work_r24;
s32 work_r26;
s32 work_r3;
s32 work_r3_2;
Expand All @@ -1390,18 +1402,19 @@ s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
u8 scratch_r7_3;
u8* scratch_r6;
u8* quant_table;
u8* chroma_quant_table;
s32 quant_scale;
u8* base;
JpegWork* work;
u8* work_r23;
u8 huff_ac_chroma[0xB2];
HuffAcTable huff_ac_chroma;
u8* work_r4_4;
u8* work_r4_5;
u8* work_r5_3;
s32 scratch_r0;
s32 width;
u16 scratch_r0;
s32 height;
s32 width;
u8* src;
PAD_STACK(0x2C);

base = HSD_804D2648_BUF;
work = (JpegWork*) base;
Expand All @@ -1413,7 +1426,6 @@ s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
hsd_804D79A0 = (u8*) arg3;
hsd_804D79A4 = (u8*) arg3;
quant_table = lbl_80430C40;
chroma_quant_table = quant_table + 0x40;
work->data.prev_dc[0] = work->data.prev_dc[1] = work->data.prev_dc[2] = 0;
if (__setjmp((__jmp_buf*) base) != 0) {
return 0;
Expand All @@ -1429,45 +1441,43 @@ s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
longjmp((__jmp_buf*) base, 1);
}
hsd_803B46D4();
memcpy(comment, lbl_803B9670.data.comment, sizeof(comment));
scratch_r23 = strlen(comment) + 1;
comment = *(const JpegComment*) lbl_803B9670.data.comment;
scratch_r23 = strlen(comment.data) + 1;
hsd_803B3344(0xFFU);
hsd_803B3344(0xFEU);
scratch_r0 = scratch_r23 + 2;
hsd_803B3344((u8) (scratch_r0 >> 8U));
hsd_803B3344((u8) scratch_r0);
hsd_803B3398(comment, scratch_r23);
hsd_803B3398(comment.data, scratch_r23);
hsd_803B4A2C();
memcpy(huff_dc_luma, lbl_803B9670.data.huff_dc_luma, sizeof(huff_dc_luma));
huff_dc_luma = *(const HuffDcTable*) lbl_803B9670.data.huff_dc_luma;
hsd_803B3344(0xFFU);
hsd_803B3344(0xC4U);
hsd_803B3344(0U);
hsd_803B3344(0x1FU);
hsd_803B3344(0U);
hsd_803B3398(huff_dc_luma, 0x1CU);
memcpy(huff_dc_chroma, lbl_803B9670.data.huff_dc_chroma,
sizeof(huff_dc_chroma));
hsd_803B3398(huff_dc_luma.data, 0x1CU);
huff_dc_chroma = *(const HuffDcTable*) lbl_803B9670.data.huff_dc_chroma;
hsd_803B3344(0xFFU);
hsd_803B3344(0xC4U);
hsd_803B3344(0U);
hsd_803B3344(0x1FU);
hsd_803B3344(1U);
hsd_803B3398(huff_dc_chroma, 0x1CU);
memcpy(huff_ac_luma, lbl_803B9670.data.huff_ac_luma, sizeof(huff_ac_luma));
hsd_803B3398(huff_dc_chroma.data, 0x1CU);
huff_ac_luma = *(const HuffAcTable*) lbl_803B9670.data.huff_ac_luma;
hsd_803B3344(0xFFU);
hsd_803B3344(0xC4U);
hsd_803B3344(0U);
hsd_803B3344(0xB5U);
hsd_803B3344(0x10U);
hsd_803B3398(huff_ac_luma, 0xB2U);
memcpy(huff_ac_chroma, lbl_803B9670.data.huff_ac_chroma,
sizeof(huff_ac_chroma));
hsd_803B3398(huff_ac_luma.data, 0xB2U);
huff_ac_chroma = *(const HuffAcTable*) lbl_803B9670.data.huff_ac_chroma;
hsd_803B3344(0xFFU);
hsd_803B3344(0xC4U);
hsd_803B3344(0U);
hsd_803B3344(0xB5U);
hsd_803B3344(0x11U);
hsd_803B3398(huff_ac_chroma, 0xB2U);
hsd_803B3398(huff_ac_chroma.data, 0xB2U);
hsd_803B4D64(width, height);
if (hsd_804D79A0 < &hsd_804D79A4[hsd_804D79A8]) {
*hsd_804D79A0++ = 0xFF;
Expand Down Expand Up @@ -1550,6 +1560,7 @@ s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
if (work_r26 < 4) {
u8* work_r4_3;
fn_803B376C(work_r23);
quant_scale = lbl_804D6398;
work_r4_3 = work_r23;
work_r5_3 = base + 0x718;
for (work_r3 = 0; work_r3 < 0x40; work_r3 += 8) {
Expand All @@ -1558,37 +1569,37 @@ s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
scratch_r7 = M2C_FIELD(scratch_r6, u8*, 0);
M2C_FIELD(work_r5_3, s32*, 0) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 0) /
(s32) ((s32) scratch_r7 / (s32) lbl_804D6398));
(s32) ((s32) scratch_r7 / quant_scale));
M2C_FIELD(work_r5_3, s32*, 4) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 4) /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 1) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_3, s32*, 8) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 8) /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 2) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_3, s32*, 0xC) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 0xC) /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 3) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_3, s32*, 0x10) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 0x10) /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 4) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_3, s32*, 0x14) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 0x14) /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 5) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_3, s32*, 0x18) =
(s32) ((s32) M2C_FIELD(work_r4_3, s32*, 0x18) /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 6) /
(s32) lbl_804D6398));
quant_scale));
scratch_r7_2 = M2C_FIELD(work_r4_3, s32*, 0x1C);
work_r4_3 += 0x20;
M2C_FIELD(work_r5_3, s32*, 0x1C) =
(s32) (scratch_r7_2 /
(s32) ((s32) M2C_FIELD(scratch_r6, u8*, 7) /
(s32) lbl_804D6398));
quant_scale));
work_r5_3 += 0x20;
}
hsd_803B3CD8(0);
Expand All @@ -1597,88 +1608,90 @@ s32 hsd_803B51C8(s32 arg0, s32 arg1, s32 arg2, char* arg3, s32 arg4)
goto loop_61;
}
fn_803B376C(base + 0x518);
quant_scale = lbl_804D6398;
work_r26_2 = base + 0x718;
work_r5_4 = work_r26_2;
work_r4_4 = base + 0x518;
for (work_r3_2 = 0; work_r3_2 < 0x40; work_r3_2 += 8) {
u8* scratch_r6_2;
scratch_r6_2 = chroma_quant_table + work_r3_2;
scratch_r6_2 = quant_table + 0x40 + work_r3_2;
scratch_r7_3 = M2C_FIELD(scratch_r6_2, u8*, 0);
M2C_FIELD(work_r5_4, s32*, 0) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 0) /
(s32) ((s32) scratch_r7_3 / (s32) lbl_804D6398));
(s32) ((s32) scratch_r7_3 / quant_scale));
M2C_FIELD(work_r5_4, s32*, 4) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 4) /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 1) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_4, s32*, 8) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 8) /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 2) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_4, s32*, 0xC) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 0xC) /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 3) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_4, s32*, 0x10) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 0x10) /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 4) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_4, s32*, 0x14) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 0x14) /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 5) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r5_4, s32*, 0x18) =
(s32) ((s32) M2C_FIELD(work_r4_4, s32*, 0x18) /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 6) /
(s32) lbl_804D6398));
quant_scale));
scratch_r7_4 = M2C_FIELD(work_r4_4, s32*, 0x1C);
work_r4_4 += 0x20;
M2C_FIELD(work_r5_4, s32*, 0x1C) =
(s32) (scratch_r7_4 /
(s32) ((s32) M2C_FIELD(scratch_r6_2, u8*, 7) /
(s32) lbl_804D6398));
quant_scale));
work_r5_4 += 0x20;
}
hsd_803B3CD8(1);
fn_803B376C(base + 0x618);
quant_scale = lbl_804D6398;
work_r4_5 = base + 0x618;
for (work_r3_3 = 0; work_r3_3 < 0x40; work_r3_3 += 8) {
u8* scratch_r5;
scratch_r5 = chroma_quant_table + work_r3_3;
scratch_r5 = quant_table + 0x40 + work_r3_3;
scratch_r6_3 = M2C_FIELD(scratch_r5, u8*, 0);
M2C_FIELD(work_r26_2, s32*, 0) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 0) /
(s32) ((s32) scratch_r6_3 / (s32) lbl_804D6398));
(s32) ((s32) scratch_r6_3 / quant_scale));
M2C_FIELD(work_r26_2, s32*, 4) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 4) /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 1) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r26_2, s32*, 8) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 8) /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 2) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r26_2, s32*, 0xC) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 0xC) /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 3) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r26_2, s32*, 0x10) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 0x10) /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 4) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r26_2, s32*, 0x14) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 0x14) /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 5) /
(s32) lbl_804D6398));
quant_scale));
M2C_FIELD(work_r26_2, s32*, 0x18) =
(s32) ((s32) M2C_FIELD(work_r4_5, s32*, 0x18) /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 6) /
(s32) lbl_804D6398));
quant_scale));
scratch_r6_4 = M2C_FIELD(work_r4_5, s32*, 0x1C);
work_r4_5 += 0x20;
M2C_FIELD(work_r26_2, s32*, 0x1C) =
(s32) (scratch_r6_4 /
(s32) ((s32) M2C_FIELD(scratch_r5, u8*, 7) /
(s32) lbl_804D6398));
quant_scale));
work_r26_2 += 0x20;
}
hsd_803B3CD8(2);
Expand Down
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