Decompile _doModFunc
This commit is contained in:
Ryan Dwyer
parent
2771f9f062
commit
11c53e6f92
1
Makefile
1
Makefile
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@ -83,6 +83,7 @@ $(B_DIR)/lib/ultra/libc/llcvt.o: MIPSISET := -mips3 -32
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# it introduces a race condition when using make -j because they create a
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# temporary include-stdin.u file during compilation.
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# For these files, see their explicit targets towards the end of this file.
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$(B_DIR)/lib/lib_3a100.o: OPT_LVL := -g
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$(B_DIR)/lib/ultra/audio/bnkf.o: OPT_LVL := -g
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$(B_DIR)/lib/ultra/audio/cseq.o: OPT_LVL := -g
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$(B_DIR)/lib/ultra/audio/csplayer.o: OPT_LVL := -g
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@ -10,7 +10,6 @@ u32 func0003ae60(void);
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u32 func0003b178(void);
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u32 func0003b370(void);
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u32 func0003b54c(void);
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u32 func0003b64c(void);
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u32 func0003b710(void);
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u32 func0003b884(void);
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u32 func0003b9d4(void);
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@ -1,4 +1,5 @@
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#include <ultra64.h>
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#include "PR/synthInternals.h"
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#include "constants.h"
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#include "game/atan2f.h"
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#include "bss.h"
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@ -7,6 +8,8 @@
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#include "data.h"
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#include "types.h"
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#define RANGE 2.0f
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GLOBAL_ASM(
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glabel func0003a100
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.late_rodata
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@ -959,7 +962,7 @@ glabel func0003ae60
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/* 3aeb0: 014b6023 */ subu $t4,$t2,$t3
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/* 3aeb4: afac0030 */ sw $t4,0x30($sp)
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/* 3aeb8: 8fa4005c */ lw $a0,0x5c($sp)
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/* 3aebc: 0c00ed93 */ jal func0003b64c
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/* 3aebc: 0c00ed93 */ jal _doModFunc
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/* 3aec0: 8fa5002c */ lw $a1,0x2c($sp)
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/* 3aec4: e7a00038 */ swc1 $f0,0x38($sp)
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/* 3aec8: 8fad0030 */ lw $t5,0x30($sp)
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@ -1469,62 +1472,40 @@ glabel func0003b54c
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/* 3b648: 00000000 */ nop
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);
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GLOBAL_ASM(
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glabel func0003b64c
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/* 3b64c: 27bdfff8 */ addiu $sp,$sp,-8
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/* 3b650: 44853000 */ mtc1 $a1,$f6
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/* 3b654: c4840010 */ lwc1 $f4,0x10($a0)
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/* 3b658: c4900014 */ lwc1 $f16,0x14($a0)
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/* 3b65c: 46803220 */ cvt.s.w $f8,$f6
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/* 3b660: 46082282 */ mul.s $f10,$f4,$f8
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/* 3b664: 460a8480 */ add.s $f18,$f16,$f10
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/* 3b668: e4920014 */ swc1 $f18,0x14($a0)
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/* 3b66c: 3c014000 */ lui $at,0x4000
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/* 3b670: 44812000 */ mtc1 $at,$f4
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/* 3b674: c4860014 */ lwc1 $f6,0x14($a0)
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/* 3b678: 4606203c */ c.lt.s $f4,$f6
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/* 3b67c: 00000000 */ nop
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/* 3b680: 45000007 */ bc1f .L0003b6a0
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/* 3b684: 00000000 */ nop
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/* 3b688: 3c014080 */ lui $at,0x4080
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/* 3b68c: 44818000 */ mtc1 $at,$f16
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/* 3b690: c4880014 */ lwc1 $f8,0x14($a0)
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/* 3b694: 46104281 */ sub.s $f10,$f8,$f16
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/* 3b698: 10000003 */ b .L0003b6a8
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/* 3b69c: e48a0014 */ swc1 $f10,0x14($a0)
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.L0003b6a0:
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/* 3b6a0: c4920014 */ lwc1 $f18,0x14($a0)
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/* 3b6a4: e4920014 */ swc1 $f18,0x14($a0)
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.L0003b6a8:
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/* 3b6a8: c4860014 */ lwc1 $f6,0x14($a0)
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/* 3b6ac: e7a60004 */ swc1 $f6,0x4($sp)
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/* 3b6b0: c7a40004 */ lwc1 $f4,0x4($sp)
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/* 3b6b4: 44804000 */ mtc1 $zero,$f8
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/* 3b6b8: 00000000 */ nop
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/* 3b6bc: 4608203c */ c.lt.s $f4,$f8
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/* 3b6c0: 00000000 */ nop
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/* 3b6c4: 45000004 */ bc1f .L0003b6d8
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/* 3b6c8: 00000000 */ nop
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/* 3b6cc: 46002407 */ neg.s $f16,$f4
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/* 3b6d0: 10000001 */ b .L0003b6d8
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/* 3b6d4: e7b00004 */ swc1 $f16,0x4($sp)
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.L0003b6d8:
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/* 3b6d8: 3c013f80 */ lui $at,0x3f80
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/* 3b6dc: 44819000 */ mtc1 $at,$f18
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/* 3b6e0: c7aa0004 */ lwc1 $f10,0x4($sp)
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/* 3b6e4: 46125181 */ sub.s $f6,$f10,$f18
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/* 3b6e8: e7a60004 */ swc1 $f6,0x4($sp)
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/* 3b6ec: c488001c */ lwc1 $f8,0x1c($a0)
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/* 3b6f0: c7a40004 */ lwc1 $f4,0x4($sp)
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/* 3b6f4: 46044002 */ mul.s $f0,$f8,$f4
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/* 3b6f8: 10000003 */ b .L0003b708
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/* 3b6fc: 00000000 */ nop
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/* 3b700: 10000001 */ b .L0003b708
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/* 3b704: 00000000 */ nop
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.L0003b708:
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/* 3b708: 03e00008 */ jr $ra
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/* 3b70c: 27bd0008 */ addiu $sp,$sp,0x8
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);
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/**
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* Generate a triangle wave from -1 to 1, and find the current position
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* in the wave. (Rate of the wave is controlled by d->rsinc, which is chorus
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* rate) Multiply the current triangle wave value by d->rsgain, (chorus depth)
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* which is expressed in number of samples back from output pointer the chorus
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* should go at it's full chorus. In otherwords, this function returns a number
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* of samples the output pointer should modulate backwards.
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*/
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f32 _doModFunc(ALDelay *d, s32 count)
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{
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f32 val;
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/*
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* generate bipolar sawtooth
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* from -RANGE to +RANGE
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*/
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d->rsval += d->rsinc * count;
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d->rsval = (d->rsval > RANGE) ? d->rsval - (RANGE * 2) : d->rsval;
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/*
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* convert to monopolar triangle
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* from 0 to RANGE
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*/
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val = d->rsval;
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val = (val < 0) ? -val : val;
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/*
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* convert to bipolar triangle
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* from -1 to 1
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*/
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val -= RANGE/2;
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return d->rsgain * val;
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}
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GLOBAL_ASM(
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glabel func0003b710
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