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| author | Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr> | 2022-01-06 22:00:53 +0100 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2022-01-08 15:46:10 +1000 |
| commit | e9d07601f6c412ef03e00b03d13ae22488be0bbe (patch) | |
| tree | 7f89dff524bbdc7b8ad5c37f6e57a229de023deb /include | |
| parent | c7f9dd546510a27c77e8e90e4fb527bf830853fb (diff) | |
| download | qemu-e9d07601f6c412ef03e00b03d13ae22488be0bbe.zip qemu-e9d07601f6c412ef03e00b03d13ae22488be0bbe.tar.gz qemu-e9d07601f6c412ef03e00b03d13ae22488be0bbe.tar.bz2 | |
qemu/int128: addition of div/rem 128-bit operations
Addition of div and rem on 128-bit integers, using the 128/64->128 divu and
64x64->128 mulu in host-utils.
These operations will be used within div/rem helpers in the 128-bit riscv
target.
Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-4-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/qemu/int128.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/qemu/int128.h b/include/qemu/int128.h index b6d517a..2c40642 100644 --- a/include/qemu/int128.h +++ b/include/qemu/int128.h @@ -172,6 +172,26 @@ static inline Int128 bswap128(Int128 a) #endif } +static inline Int128 int128_divu(Int128 a, Int128 b) +{ + return (__uint128_t)a / (__uint128_t)b; +} + +static inline Int128 int128_remu(Int128 a, Int128 b) +{ + return (__uint128_t)a % (__uint128_t)b; +} + +static inline Int128 int128_divs(Int128 a, Int128 b) +{ + return a / b; +} + +static inline Int128 int128_rems(Int128 a, Int128 b) +{ + return a % b; +} + #else /* !CONFIG_INT128 */ typedef struct Int128 Int128; @@ -379,6 +399,11 @@ static inline Int128 bswap128(Int128 a) return int128_make128(bswap64(a.hi), bswap64(a.lo)); } +Int128 int128_divu(Int128, Int128); +Int128 int128_remu(Int128, Int128); +Int128 int128_divs(Int128, Int128); +Int128 int128_rems(Int128, Int128); + #endif /* CONFIG_INT128 */ static inline void bswap128s(Int128 *s) @@ -386,4 +411,6 @@ static inline void bswap128s(Int128 *s) *s = bswap128(*s); } +#define UINT128_MAX int128_make128(~0LL, ~0LL) + #endif /* INT128_H */ |