yuzu-emu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2024-10-20 07:48:30 +02:00
Code Issues Packages Projects Releases Wiki Activity

int128: Add int128_make128

Browse Source 
Allows Int128 to be used more generally, rather than having to
begin with 64-bit inputs and accumulate.

Backports commit 1edaeee0955fba7d834b7c8f4e372e7eae030745 from qemu
This commit is contained in:
Richard Henderson 2018-02-27 11:06:30 -05:00 committed by Lioncash
parent 9084e5fe1b
commit d5510a546f
No known key found for this signature in database
GPG Key ID: 4E3C3CC1031BA9C7
1 changed files with 18 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
qemu/include/qemu/int128.h
View File

@ -12,6 +12,11 @@ static inline Int128 int128_make64(uint64_t a)
return a;
}
static inline Int128 int128_make128(uint64_t lo, uint64_t hi)
{
return (__uint128_t)hi << 64 | lo;
}
static inline uint64_t int128_get64(Int128 a)
{
uint64_t r = a;
@ -149,6 +154,14 @@ static inline Int128 int128_make64(uint64_t a)
return i128;
}
static inline Int128 int128_make128(uint64_t lo, uint64_t hi)
{
Int128 res;
res.lo = lo;
res.hi = hi;
return res;
}
static inline uint64_t int128_get64(Int128 a)
{
//assert(!a.hi);
@ -201,11 +214,9 @@ static inline Int128 int128_rshift(Int128 a, int n)
}
h = a.hi >> (n & 63);
if (n >= 64) {
Int128 i128 = { h, h >> 63 };
return i128;
return int128_make128(h, h >> 63);
} else {
Int128 i128 = { (a.lo >> n) | ((uint64_t)a.hi << (64 - n)), h };
return i128;
return int128_make128((a.lo >> n) | ((uint64_t)a.hi << (64 - n)), h);
}
}
@ -219,21 +230,18 @@ static inline Int128 int128_add(Int128 a, Int128 b)
*
* So the carry is lo < a.lo.
*/
Int128 i128 = { lo, (uint64_t)a.hi + b.hi + (lo < a.lo) };
return i128;
return int128_make128(lo, (uint64_t)a.hi + b.hi + (lo < a.lo));
}
static inline Int128 int128_neg(Int128 a)
{
uint64_t lo = 0-a.lo;
Int128 i128 = { lo, ~(uint64_t)a.hi + !lo };
return i128;
return int128_make128(lo, ~(uint64_t)a.hi + !lo);
}
static inline Int128 int128_sub(Int128 a, Int128 b)
{
Int128 i128 = { a.lo - b.lo, (uint64_t)a.hi - b.hi - (a.lo < b.lo) };
return i128;
return int128_make128(a.lo - b.lo, (uint64_t)a.hi - b.hi - (a.lo < b.lo));
}
static inline bool int128_nonneg(Int128 a)