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Decompile _getVol

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This commit is contained in:
Ryan Dwyer
2021-10-16 00:08:23 +10:00
parent feeb7cb6b8
commit cb607a3b62
1 changed files with 20 additions and 59 deletions
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src/lib/naudio/n_env.c
+20 -59
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@@ -1035,63 +1035,24 @@ glabel var70054b34
/* 3f818: 27bd0010 */ addiu $sp,$sp,0x10
);
GLOBAL_ASM(
glabel _getVol
/* 3f81c: 00042400 */ sll $a0,$a0,0x10
/* 3f820: 00063400 */ sll $a2,$a2,0x10
/* 3f824: 00063403 */ sra $a2,$a2,0x10
/* 3f828: 00042403 */ sra $a0,$a0,0x10
/* 3f82c: 27bdfff8 */ addiu $sp,$sp,-8
/* 3f830: 30e7ffff */ andi $a3,$a3,0xffff
/* 3f834: 000528c3 */ sra $a1,$a1,0x3
/* 3f838: 14a00003 */ bnez $a1,.L0003f848
/* 3f83c: 00000000 */ nop
/* 3f840: 10000015 */ b .L0003f898
/* 3f844: 00801025 */ or $v0,$a0,$zero
.L0003f848:
/* 3f848: 00e50019 */ multu $a3,$a1
/* 3f84c: 00007012 */ mflo $t6
/* 3f850: afae0004 */ sw $t6,0x4($sp)
/* 3f854: 00000000 */ nop
/* 3f858: 8faf0004 */ lw $t7,0x4($sp)
/* 3f85c: 000fc403 */ sra $t8,$t7,0x10
/* 3f860: afb80004 */ sw $t8,0x4($sp)
/* 3f864: 00c50019 */ multu $a2,$a1
/* 3f868: 8fb90004 */ lw $t9,0x4($sp)
/* 3f86c: 00004012 */ mflo $t0
/* 3f870: 03284821 */ addu $t1,$t9,$t0
/* 3f874: afa90004 */ sw $t1,0x4($sp)
/* 3f878: 8faa0004 */ lw $t2,0x4($sp)
/* 3f87c: 008a2021 */ addu $a0,$a0,$t2
/* 3f880: 00042400 */ sll $a0,$a0,0x10
/* 3f884: 00042403 */ sra $a0,$a0,0x10
/* 3f888: 10000003 */ b .L0003f898
/* 3f88c: 00801025 */ or $v0,$a0,$zero
/* 3f890: 10000001 */ b .L0003f898
/* 3f894: 00000000 */ nop
.L0003f898:
/* 3f898: 03e00008 */ jr $ra
/* 3f89c: 27bd0008 */ addiu $sp,$sp,0x8
);
s16 _getVol(s16 ivol, s32 samples, s16 ratem, u16 ratel)
{
s32 sp4;
//s16 _getVol(s16 ivol, s32 samples, s16 ratem, u16 ratel)
//{
// s32 sp4;
//
// /*
// * Rate values are actually rate^8
// */
// samples >>= 3;
//
// if (samples == 0) {
// return ivol;
// }
//
// sp4 = ratel * samples;
// sp4 >>= 16;
// sp4 += ratem * samples;
//
// ivol += sp4;
//
// return ivol;
//}
/*
* Rate values are actually rate^8
*/
samples >>= 3;
if (samples == 0) {
return ivol;
}
sp4 = ratel * samples;
sp4 >>= 16;
sp4 += ratem * samples;
ivol += sp4;
return ivol;
}