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Decompile guMtxL2F

This commit is contained in:
Ryan Dwyer 2021-03-17 22:07:47 +10:00
parent 6dbcff916f
commit 05dee8881e
2 changed files with 23 additions and 51 deletions
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2
Makefile
View File

@ -68,7 +68,7 @@ $(B_DIR)/lib/ultra/io/conteepread.o: LOOPUNROLL :=
$(B_DIR)/lib/ultra/io/conteepwrite.o: LOOPUNROLL :=
$(B_DIR)/lib/ultra/libc/ll.o: MIPSISET := -mips3 -o32
$(B_DIR)/lib/ultra/libc/llcvt.o: MIPSISET := -mips3 -o32
$(B_DIR)/lib/ultra/libc/llcvt.o: MIPSISET := -mips3 -32
$(B_DIR)/lib/ultra/gu/frustum.o: OPT_LVL := -O3
$(B_DIR)/lib/ultra/gu/ortho.o: OPT_LVL := -O3

72
src/lib/ultra/gu/mtxutil.c
View File

@ -40,53 +40,25 @@ void guMtxIdent(Mtx *m)
guMtxF2L(mf, m);
}
GLOBAL_ASM(
glabel func0004a518
/* 4a518: 3c013780 */ lui $at,0x3780
/* 4a51c: 44810000 */ mtc1 $at,$f0
/* 4a520: 27bdfff0 */ addiu $sp,$sp,-16
/* 4a524: 00a01025 */ or $v0,$a1,$zero
/* 4a528: 24a30020 */ addiu $v1,$a1,0x20
/* 4a52c: 00003025 */ or $a2,$zero,$zero
/* 4a530: 00804025 */ or $t0,$a0,$zero
/* 4a534: 240c0004 */ addiu $t4,$zero,0x4
/* 4a538: 240b0002 */ addiu $t3,$zero,0x2
/* 4a53c: 3c0affff */ lui $t2,0xffff
.L0004a540:
/* 4a540: 00002025 */ or $a0,$zero,$zero
/* 4a544: 01004825 */ or $t1,$t0,$zero
.L0004a548:
/* 4a548: 8c6e0000 */ lw $t6,0x0($v1)
/* 4a54c: 8c590000 */ lw $t9,0x0($v0)
/* 4a550: 24840001 */ addiu $a0,$a0,0x1
/* 4a554: 000e7c02 */ srl $t7,$t6,0x10
/* 4a558: 31f8ffff */ andi $t8,$t7,0xffff
/* 4a55c: 032a6824 */ and $t5,$t9,$t2
/* 4a560: 030d7025 */ or $t6,$t8,$t5
/* 4a564: afae0004 */ sw $t6,0x4($sp)
/* 4a568: 8c580000 */ lw $t8,0x0($v0)
/* 4a56c: 8fa50004 */ lw $a1,0x4($sp)
/* 4a570: 8c6f0000 */ lw $t7,0x0($v1)
/* 4a574: 00186c00 */ sll $t5,$t8,0x10
/* 4a578: 44852000 */ mtc1 $a1,$f4
/* 4a57c: 01aa7024 */ and $t6,$t5,$t2
/* 4a580: 31f9ffff */ andi $t9,$t7,0xffff
/* 4a584: 032e3825 */ or $a3,$t9,$t6
/* 4a588: 468021a0 */ cvt.s.w $f6,$f4
/* 4a58c: 44875000 */ mtc1 $a3,$f10
/* 4a590: afa70000 */ sw $a3,0x0($sp)
/* 4a594: 25290008 */ addiu $t1,$t1,0x8
/* 4a598: 24420004 */ addiu $v0,$v0,0x4
/* 4a59c: 46805420 */ cvt.s.w $f16,$f10
/* 4a5a0: 46003202 */ mul.s $f8,$f6,$f0
/* 4a5a4: 24630004 */ addiu $v1,$v1,0x4
/* 4a5a8: 46008482 */ mul.s $f18,$f16,$f0
/* 4a5ac: e528fff8 */ swc1 $f8,-0x8($t1)
/* 4a5b0: 148bffe5 */ bne $a0,$t3,.L0004a548
/* 4a5b4: e532fffc */ swc1 $f18,-0x4($t1)
/* 4a5b8: 24c60001 */ addiu $a2,$a2,0x1
/* 4a5bc: 14ccffe0 */ bne $a2,$t4,.L0004a540
/* 4a5c0: 25080010 */ addiu $t0,$t0,0x10
/* 4a5c4: 03e00008 */ jr $ra
/* 4a5c8: 27bd0010 */ addiu $sp,$sp,0x10
);
void guMtxL2F(float mf[4][4], Mtx *m)
{
int i, j;
unsigned int e1,e2;
unsigned int *ai,*af;
int q1,q2;
ai = (unsigned int *) &m->m[0][0];
af = (unsigned int *) &m->m[2][0];
for (i = 0; i < 4; i++) {
for (j = 0; j < 2; j++) {
e1 = (*ai & 0xffff0000) | ((*af >> 16) & 0xffff);
e2 = ((*(ai++) << 16) & 0xffff0000) | (*(af++) & 0xffff);
q1 = *((int *) &e1);
q2 = *((int *) &e2);
mf[i][j*2] = FIX32TOF(q1);
mf[i][j*2+1] = FIX32TOF(q2);
}
}
}