1
0
Fork 0
mirror of https://github.com/zeldaret/oot.git synced 2024-12-27 23:36:22 +00:00

Fix and tidy up missing_gcc_functions.c (#1529)

This commit is contained in:
Tharo 2023-08-29 16:30:00 +01:00 committed by GitHub
parent dadd1f8493
commit 8913c4fa0d
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23

View file

@ -7,7 +7,9 @@
#include "global.h" #include "global.h"
// Self-hosted memcmp. // Self-hosted libc memory functions, gcc assumes these exist even in a freestanding
// environment and there is no way to tell it otherwise.
int memcmp(void* s1, const void* s2, size_t n) { int memcmp(void* s1, const void* s2, size_t n) {
u8* m1 = (u8*)s1; u8* m1 = (u8*)s1;
u8* m2 = (u8*)s2; u8* m2 = (u8*)s2;
@ -35,177 +37,212 @@ void* memset(void* str, s32 c, size_t n) {
return str; return str;
} }
// These functions convert c to an unsigned integer, rounding toward zero. Negative values // Conversions involving 64-bit integer types required by the O32 MIPS ABI.
// all become zero.
u32 __fixunssfdi(f32 a) { // f32 -> u64, negative values become 0
if (a < 0.0f) { u64 __fixunssfdi(f32 a) {
a = 0.0f; if (a > 0.0f) {
register union {
f64 f;
u64 i;
} m;
__asm__ ("cvt.l.s %0, %1" : "=f"(m.f) : "f"(a));
return m.i;
} }
return 0;
return (u32)a;
} }
u32 __fixunsdfdi(f64 a) { // f64 -> u64, negative values become 0
if (a < 0.0) { u64 __fixunsdfdi(f64 a) {
a = 0.0; if (a > 0.0) {
register union {
f64 f;
u64 i;
} m;
__asm__ ("cvt.l.d %0, %1" : "=f"(m.f) : "f"(a));
return m.i;
} }
return 0;
return (u32)a;
} }
// These functions convert c to a signed integer, rounding toward zero. // f32 -> s64
s32 __fixsfdi(f32 c) { s64 __fixsfdi(f32 c) {
return (s32)c; register union {
f64 f;
s64 i;
} m;
__asm__ ("cvt.l.s %0, %1" : "=f"(m.f) : "f"(c));
return m.i;
} }
s32 __fixdfdi(f64 c) { // f64 -> s64
return (s32)c; s64 __fixdfdi(f64 c) {
register union {
f64 f;
s64 i;
} m;
__asm__ ("cvt.l.d %0, %1" : "=f"(m.f) : "f"(c));
return m.i;
} }
// These functions convert c, a signed integer, to floating point. // s64 -> f32
f32 __floatdisf(s32 c) { f32 __floatdisf(s64 c) {
return (f32)c; register union {
f64 f;
s64 i;
} m;
register f32 v;
m.i = c;
__asm__ ("cvt.s.l %0, %1" : "=f"(v) : "f"(m.f));
return v;
} }
f64 __floatdidf(s32 c) { // s64 -> f64
return (f64)c; f64 __floatdidf(s64 c) {
register union {
f64 f;
s64 i;
} m;
register f64 v;
m.i = c;
__asm__ ("cvt.d.l %0, %1" : "=f"(v) : "f"(m.f));
return v;
} }
// These functions convert c, an unsigned integer, to floating point. // u64 -> f32
f32 __floatundisf(u32 c) { f32 __floatundisf(u64 c) {
return (f32)c; register union {
f64 f;
u64 i;
} m;
register f32 v;
m.i = c;
__asm__ ("cvt.s.l %0, %1" : "=f"(v) : "f"(m.f));
if ((s64)c < 0) {
// cvt.s.l assumes signed input, adjust output
v += 4294967296.0f; // 2^32
}
return v;
} }
f64 __floatundidf(u32 c) { // u64 -> f64
return (f64)c; f64 __floatundidf(u64 c) {
register union {
f64 f;
u64 i;
} m;
register f64 v;
m.i = c;
__asm__ ("cvt.d.l %0, %1" : "=f"(v) : "f"(m.f));
if ((s64)c < 0) {
// cvt.d.l assumes signed input, adjust output
v += 18446744073709551616.0; // 2^64
}
return v;
} }
f32 __powisf2(f32 a, s32 b) { // Compute x^m by binary exponentiation
const s32 recip = b < 0;
f32 r = 1;
while (1) { f32 __powisf2(f32 x, s32 m) {
if (b & 1) { u32 n = (m < 0) ? -m : m;
r *= a; f32 y = (n % 2 != 0) ? x : 1.0f;
while (n >>= 1) {
x = x * x;
if (n % 2 != 0) {
y = y * x;
} }
b /= 2;
if (b == 0) {
break;
}
a *= a;
} }
return recip ? 1 / r : r; return (m < 0) ? (1.0f / y) : y;
} }
// Compute division and modulo of 64-bit signed and unsigned integers
__asm__(" \n\ __asm__(" \n\
.set push \n\ .set push \n\
.set noat \n\
.set noreorder \n\ .set noreorder \n\
.set gp=64 \n\ .set gp=64 \n\
\n\ \n\
.global __umoddi3 \n\ .global __umoddi3 \n\
__umoddi3: \n\ __umoddi3: \n\
.type __umoddi3, @function \n\ .type __umoddi3, @function \n\
.ent __umoddi3 \n\ .ent __umoddi3 \n\
sw $a0, ($sp) \n\ sw $a0, 0x0($sp) \n\
sw $a1, 4($sp) \n\ sw $a1, 0x4($sp) \n\
sw $a2, 8($sp) \n\ sw $a2, 0x8($sp) \n\
sw $a3, 0xc($sp) \n\ sw $a3, 0xC($sp) \n\
ld $t7, 8($sp) \n\ ld $t6, 0($sp) \n\
ld $t6, ($sp) \n\ ld $t7, 8($sp) \n\
ddivu $zero, $t6, $t7 \n\ dremu $v0, $t6, $t7 \n\
bnez $t7, 1f \n\ dsll32 $v1, $v0, 0 \n\
nop \n\ dsra32 $v1, $v1, 0 \n\
break 7 \n\ jr $ra \n\
1: \n\
mfhi $v0 \n\
dsll32 $v1, $v0, 0 \n\
dsra32 $v1, $v1, 0 \n\
jr $ra \n\
dsra32 $v0, $v0, 0 \n\ dsra32 $v0, $v0, 0 \n\
.end __umoddi3 \n\ .end __umoddi3 \n\
.size __umoddi3, . - __umoddi3 \n\ .size __umoddi3, . - __umoddi3 \n\
\n\ \n\
.global __udivdi3 \n\ .global __udivdi3 \n\
__udivdi3: \n\ __udivdi3: \n\
.type __udivdi3, @function \n\ .type __udivdi3, @function \n\
.ent __udivdi3 \n\ .ent __udivdi3 \n\
sw $a0, ($sp) \n\ sw $a0, 0x0($sp) \n\
sw $a1, 4($sp) \n\ sw $a1, 0x4($sp) \n\
sw $a2, 8($sp) \n\ sw $a2, 0x8($sp) \n\
sw $a3, 0xc($sp) \n\ sw $a3, 0xC($sp) \n\
ld $t7, 8($sp) \n\ ld $t6, 0($sp) \n\
ld $t6, ($sp) \n\ ld $t7, 8($sp) \n\
ddivu $zero, $t6, $t7 \n\ ddivu $v0, $t6, $t7 \n\
bnez $t7, 1f \n\ dsll32 $v1, $v0, 0 \n\
nop \n\ dsra32 $v1, $v1, 0 \n\
break 7 \n\ jr $ra \n\
1: \n\
mflo $v0 \n\
dsll32 $v1, $v0, 0 \n\
dsra32 $v1, $v1, 0 \n\
jr $ra \n\
dsra32 $v0, $v0, 0 \n\ dsra32 $v0, $v0, 0 \n\
.end __udivdi3 \n\ .end __udivdi3 \n\
.size __udivdi3, . - __udivdi3 \n\ .size __udivdi3, . - __udivdi3 \n\
\n\ \n\
.global __moddi3 \n\ .global __moddi3 \n\
__moddi3: \n\ __moddi3: \n\
.type __moddi3, @function \n\ .type __moddi3, @function \n\
.ent __moddi3 \n\ .ent __moddi3 \n\
sw $a0, ($sp) \n\ sw $a0, 0x0($sp) \n\
sw $a1, 4($sp) \n\ sw $a1, 0x4($sp) \n\
sw $a2, 8($sp) \n\ sw $a2, 0x8($sp) \n\
sw $a3, 0xc($sp) \n\ sw $a3, 0xC($sp) \n\
ld $t7, 8($sp) \n\ ld $t6, 0($sp) \n\
ld $t6, ($sp) \n\ ld $t7, 8($sp) \n\
ddivu $zero, $t6, $t7 \n\ drem $v0, $t6, $t7 \n\
bnez $t7, 1f \n\ dsll32 $v1, $v0, 0 \n\
nop \n\ dsra32 $v1, $v1, 0 \n\
break 7 \n\ jr $ra \n\
1: \n\
mfhi $v0 \n\
dsll32 $v1, $v0, 0 \n\
dsra32 $v1, $v1, 0 \n\
jr $ra \n\
dsra32 $v0, $v0, 0 \n\ dsra32 $v0, $v0, 0 \n\
.end __moddi3 \n\ .end __moddi3 \n\
.size __moddi3, . - __moddi3 \n\ .size __moddi3, . - __moddi3 \n\
\n\ \n\
.global __divdi3 \n\ .global __divdi3 \n\
__divdi3: \n\ __divdi3: \n\
.type __divdi3, @function \n\ .type __divdi3, @function \n\
.ent __divdi3 \n\ .ent __divdi3 \n\
sw $a0, ($sp) \n\ sw $a0, 0x0($sp) \n\
sw $a1, 4($sp) \n\ sw $a1, 0x4($sp) \n\
sw $a2, 8($sp) \n\ sw $a2, 0x8($sp) \n\
sw $a3, 0xc($sp) \n\ sw $a3, 0xC($sp) \n\
ld $t6, 0($sp) \n\
ld $t7, 8($sp) \n\ ld $t7, 8($sp) \n\
ld $t6, ($sp) \n\ ddiv $v0, $t6, $t7 \n\
ddiv $zero, $t6, $t7 \n\
nop \n\
bnez $t7, 1f \n\
nop \n\
break 7 \n\
1: \n\
daddiu $at, $zero, -1 \n\
bne $t7, $at, 2f \n\
daddiu $at, $zero, 1 \n\
dsll32 $at, $at, 0x1f \n\
bne $t6, $at, 2f \n\
nop \n\
break 6 \n\
2: \n\
mflo $v0 \n\
dsll32 $v1, $v0, 0 \n\ dsll32 $v1, $v0, 0 \n\
dsra32 $v1, $v1, 0 \n\ dsra32 $v1, $v1, 0 \n\
jr $ra \n\ jr $ra \n\
dsra32 $v0, $v0, 0 \n\ dsra32 $v0, $v0, 0 \n\
.end __divdi3 \n\ .end __divdi3 \n\
.size __divdi3, . - __divdi3 \n\ .size __divdi3, . - __divdi3 \n\
\n\ \n\
.set pop \n\ .set pop \n\
\n"); \n");