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Decompile guFrustumF

This commit is contained in:
Ryan Dwyer 2021-01-29 17:20:29 +10:00
parent 1d96c871af
commit 78c11c19c5
4 changed files with 27 additions and 96 deletions
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1
Makefile
View File

@ -62,6 +62,7 @@ OPT_LVL := -O2
LOOPUNROLL := -Wo,-loopunroll,0
$(B_DIR)/lib/lib_4a360.o: LOOPUNROLL :=
$(B_DIR)/lib/lib_4fe20.o: LOOPUNROLL :=
$(B_DIR)/lib/libc/ll.o: MIPSISET := -mips3 -o32
$(B_DIR)/lib/libc/llcvt.o: MIPSISET := -mips3 -o32

2
src/game/game_0d4690.c
View File

@ -181,7 +181,7 @@ glabel func0f0d479c
/* f0d487c: 44078000 */ mfc1 $a3,$f16
/* f0d4880: 44818000 */ mtc1 $at,$f16
/* f0d4884: e7a60010 */ swc1 $f6,0x10($sp)
/* f0d4888: 0c013f88 */ jal func0004fe20
/* f0d4888: 0c013f88 */ jal guFrustumF
/* f0d488c: e7b0001c */ swc1 $f16,0x1c($sp)
/* f0d4890: 02002025 */ or $a0,$s0,$zero
/* f0d4894: 0c005815 */ jal func00016054

2
src/include/lib/lib_4fe20.h
View File

@ -3,6 +3,4 @@
#include <ultra64.h>
#include "types.h"
u32 func0004fe20(void);
#endif

118
src/lib/lib_4fe20.c
View File

@ -12,98 +12,30 @@
#include "lib/lib_4fe20.h"
#include "types.h"
void guFrustumF(float mf[4][4], float l, float r, float b, float t, float n, float f, float scale)
{
int i, j;
guMtxIdentF(mf);
mf[0][0] = 2 * n / (r - l);
mf[1][1] = 2 * n / (t - b);
mf[2][0] = (r + l) / (r - l);
mf[2][1] = (t + b) / (t - b);
mf[2][2] = -(f + n) / (f - n);
mf[2][3] = -1;
mf[3][2] = -2 * f * n / (f - n);
mf[3][3] = 0;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
mf[i][j] *= scale;
}
}
}
GLOBAL_ASM(
glabel func0004fe20
/* 4fe20: 27bdffe8 */ addiu $sp,$sp,-24
/* 4fe24: afbf0014 */ sw $ra,0x14($sp)
/* 4fe28: afa5001c */ sw $a1,0x1c($sp)
/* 4fe2c: afa60020 */ sw $a2,0x20($sp)
/* 4fe30: afa70024 */ sw $a3,0x24($sp)
/* 4fe34: 0c012918 */ jal guMtxIdentF
/* 4fe38: afa40018 */ sw $a0,0x18($sp)
/* 4fe3c: 3c014000 */ lui $at,0x4000
/* 4fe40: c7ae002c */ lwc1 $f14,0x2c($sp)
/* 4fe44: 44812000 */ mtc1 $at,$f4
/* 4fe48: c7a60020 */ lwc1 $f6,0x20($sp)
/* 4fe4c: c7a8001c */ lwc1 $f8,0x1c($sp)
/* 4fe50: 460e2002 */ mul.s $f0,$f4,$f14
/* 4fe54: 8fa20018 */ lw $v0,0x18($sp)
/* 4fe58: 46083081 */ sub.s $f2,$f6,$f8
/* 4fe5c: c7b20028 */ lwc1 $f18,0x28($sp)
/* 4fe60: 3c01bf80 */ lui $at,0xbf80
/* 4fe64: 00001825 */ or $v1,$zero,$zero
/* 4fe68: 24040004 */ addiu $a0,$zero,0x4
/* 4fe6c: 46020283 */ div.s $f10,$f0,$f2
/* 4fe70: e44a0000 */ swc1 $f10,0x0($v0)
/* 4fe74: c7a40024 */ lwc1 $f4,0x24($sp)
/* 4fe78: 46049301 */ sub.s $f12,$f18,$f4
/* 4fe7c: 460c0183 */ div.s $f6,$f0,$f12
/* 4fe80: e4460014 */ swc1 $f6,0x14($v0)
/* 4fe84: c7aa001c */ lwc1 $f10,0x1c($sp)
/* 4fe88: c7a80020 */ lwc1 $f8,0x20($sp)
/* 4fe8c: 460a4100 */ add.s $f4,$f8,$f10
/* 4fe90: 46022183 */ div.s $f6,$f4,$f2
/* 4fe94: e4460020 */ swc1 $f6,0x20($v0)
/* 4fe98: c7a80024 */ lwc1 $f8,0x24($sp)
/* 4fe9c: 46089280 */ add.s $f10,$f18,$f8
/* 4fea0: 460c5103 */ div.s $f4,$f10,$f12
/* 4fea4: e4440024 */ swc1 $f4,0x24($v0)
/* 4fea8: c7a60030 */ lwc1 $f6,0x30($sp)
/* 4feac: 460e3200 */ add.s $f8,$f6,$f14
/* 4feb0: 460e3401 */ sub.s $f16,$f6,$f14
/* 4feb4: 44813000 */ mtc1 $at,$f6
/* 4feb8: 3c01c000 */ lui $at,0xc000
/* 4febc: 46004287 */ neg.s $f10,$f8
/* 4fec0: e446002c */ swc1 $f6,0x2c($v0)
/* 4fec4: 46105103 */ div.s $f4,$f10,$f16
/* 4fec8: 44814000 */ mtc1 $at,$f8
/* 4fecc: e4440028 */ swc1 $f4,0x28($v0)
/* 4fed0: c7aa0030 */ lwc1 $f10,0x30($sp)
/* 4fed4: 460a4102 */ mul.s $f4,$f8,$f10
/* 4fed8: 44805000 */ mtc1 $zero,$f10
/* 4fedc: 00000000 */ nop
/* 4fee0: e44a003c */ swc1 $f10,0x3c($v0)
/* 4fee4: 460e2182 */ mul.s $f6,$f4,$f14
/* 4fee8: 46103203 */ div.s $f8,$f6,$f16
/* 4feec: e4480038 */ swc1 $f8,0x38($v0)
/* 4fef0: c7a00034 */ lwc1 $f0,0x34($sp)
/* 4fef4: c4480000 */ lwc1 $f8,0x0($v0)
/* 4fef8: 24630001 */ addiu $v1,$v1,0x1
/* 4fefc: c44e0004 */ lwc1 $f14,0x4($v0)
/* 4ff00: 46004402 */ mul.s $f16,$f8,$f0
/* 4ff04: c4520008 */ lwc1 $f18,0x8($v0)
/* 4ff08: 10640010 */ beq $v1,$a0,.L0004ff4c
/* 4ff0c: c44c000c */ lwc1 $f12,0xc($v0)
.L0004ff10:
/* 4ff10: 46007282 */ mul.s $f10,$f14,$f0
/* 4ff14: c4480010 */ lwc1 $f8,0x10($v0)
/* 4ff18: c44e0014 */ lwc1 $f14,0x14($v0)
/* 4ff1c: 46009182 */ mul.s $f6,$f18,$f0
/* 4ff20: c4520018 */ lwc1 $f18,0x18($v0)
/* 4ff24: 24630001 */ addiu $v1,$v1,0x1
/* 4ff28: 46006102 */ mul.s $f4,$f12,$f0
/* 4ff2c: c44c001c */ lwc1 $f12,0x1c($v0)
/* 4ff30: e4500000 */ swc1 $f16,0x0($v0)
/* 4ff34: 46004402 */ mul.s $f16,$f8,$f0
/* 4ff38: e44a0004 */ swc1 $f10,0x4($v0)
/* 4ff3c: e4460008 */ swc1 $f6,0x8($v0)
/* 4ff40: 24420010 */ addiu $v0,$v0,0x10
/* 4ff44: 1464fff2 */ bne $v1,$a0,.L0004ff10
/* 4ff48: e444fffc */ swc1 $f4,-0x4($v0)
.L0004ff4c:
/* 4ff4c: 46007282 */ mul.s $f10,$f14,$f0
/* 4ff50: 24420010 */ addiu $v0,$v0,0x10
/* 4ff54: e450fff0 */ swc1 $f16,-0x10($v0)
/* 4ff58: 46009182 */ mul.s $f6,$f18,$f0
/* 4ff5c: 00000000 */ nop
/* 4ff60: 46006102 */ mul.s $f4,$f12,$f0
/* 4ff64: e44afff4 */ swc1 $f10,-0xc($v0)
/* 4ff68: e446fff8 */ swc1 $f6,-0x8($v0)
/* 4ff6c: e444fffc */ swc1 $f4,-0x4($v0)
/* 4ff70: 8fbf0014 */ lw $ra,0x14($sp)
/* 4ff74: 27bd0018 */ addiu $sp,$sp,0x18
/* 4ff78: 03e00008 */ jr $ra
/* 4ff7c: 00000000 */ nop
glabel func0004ff80
/* 4ff80: 27bdff98 */ addiu $sp,$sp,-104
/* 4ff84: 44856000 */ mtc1 $a1,$f12
/* 4ff88: 44867000 */ mtc1 $a2,$f14
@ -121,7 +53,7 @@ glabel func0004fe20
/* 4ffb8: e7a40010 */ swc1 $f4,0x10($sp)
/* 4ffbc: e7a60014 */ swc1 $f6,0x14($sp)
/* 4ffc0: e7a80018 */ swc1 $f8,0x18($sp)
/* 4ffc4: 0c013f88 */ jal func0004fe20
/* 4ffc4: 0c013f88 */ jal guFrustumF
/* 4ffc8: e7aa001c */ swc1 $f10,0x1c($sp)
/* 4ffcc: 27a40028 */ addiu $a0,$sp,0x28
/* 4ffd0: 0c0128d8 */ jal guMtxF2L
@ -132,4 +64,4 @@ glabel func0004fe20
/* 4ffe4: 00000000 */ nop
/* 4ffe8: 00000000 */ nop
/* 4ffec: 00000000 */ nop
);
);