git.ucc.asn.au
/
tpg
/
acess2.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
Fiddling with x86_64 and i486 builds
[tpg/acess2.git]
/
Usermode
/
Libraries
/
libgcc.so_src
/
libgcc.c
diff --git
a/Usermode/Libraries/libgcc.so_src/libgcc.c
b/Usermode/Libraries/libgcc.so_src/libgcc.c
index
6e7fb08
..
8f6021f
100644
(file)
--- a/
Usermode/Libraries/libgcc.so_src/libgcc.c
+++ b/
Usermode/Libraries/libgcc.so_src/libgcc.c
@@
-46,35
+46,43
@@
uint64_t __udivdi3(uint64_t Num, uint64_t Den)
}
return ret;
#else
}
return ret;
#else
- uint64_t P[64], q, n;
+ uint64_t P[2];
+ uint64_t q;
int i;
if(Den == 0) __asm__ __volatile__ ("int $0x0");
// Common speedups
int i;
if(Den == 0) __asm__ __volatile__ ("int $0x0");
// Common speedups
+ if(Num <= 0xFFFFFFFF && Den <= 0xFFFFFFFF)
+ return (uint32_t)Num / (uint32_t)Den;
if(Den == 1) return Num;
if(Den == 2) return Num >> 1;
if(Den == 16) return Num >> 4;
if(Den == 1) return Num;
if(Den == 2) return Num >> 1;
if(Den == 16) return Num >> 4;
+ if(Num < Den) return 0;
+ if(Num < Den*2) return 1;
+ if(Num == Den*2) return 2;
-
- // Non-restoring division, from wikipedia
+ // Restoring division, from wikipedia
// http://en.wikipedia.org/wiki/Division_(digital)
// http://en.wikipedia.org/wiki/Division_(digital)
- P[0] = Num;
- for( i =
0; i < 64; i ++
)
+ P[0] = Num;
P[1] = 0;
+ for( i =
64; i--;
)
{
{
- if( P[i] >= 0 ) {
+ // P <<= 1;
+ P[1] = (P[1] << 1) | (P[0] >> 63);
+ P[0] = P[0] << 1;
+
+ // P -= Den << 64
+ P[1] -= Den;
+
+ // P >= 0
+ if( !(P[1] & (1ULL<<63)) ) {
q |= (uint64_t)1 << (63-i);
q |= (uint64_t)1 << (63-i);
- P[i+1] = 2*P[i] - Den;
}
else {
//q |= 0 << (63-i);
}
else {
//q |= 0 << (63-i);
- P[
i+1] = 2*P[i] +
Den;
+ P[
1] +=
Den;
}
}
}
}
- n = ~q;
- n = -n;
- q += n;
-
return q;
#endif
}
return q;
#endif
}
@@
-103,9
+111,17
@@
uint64_t __umoddi3(uint64_t Num, uint64_t Den)
return Num;
#else
if(Den == 0) __asm__ __volatile__ ("int $0"); // Call Div by Zero Error
return Num;
#else
if(Den == 0) __asm__ __volatile__ ("int $0"); // Call Div by Zero Error
+
+ // Speedups
+ if(Num < Den) return Num;
+ if(Num == Den) return 0;
+ if(Num <= 0xFFFFFFFF && Den <= 0xFFFFFFFF)
+ return (uint32_t)Num % (uint32_t)Den;
+
// Speedups for common operations
if(Den == 1) return 0;
if(Den == 2) return Num & 0x01;
// Speedups for common operations
if(Den == 1) return 0;
if(Den == 2) return Num & 0x01;
+ if(Den == 8) return Num & 0x07;
if(Den == 16) return Num & 0x0F;
return Num - __udivdi3(Num, Den) * Den;
#endif
if(Den == 16) return Num & 0x0F;
return Num - __udivdi3(Num, Den) * Den;
#endif
UCC
git Repository :: git.ucc.asn.au