From 613cf0fcbabee5ec34cab85a933eb3d46845a7cb Mon Sep 17 00:00:00 2001 From: Matheus Ferst Date: Wed, 30 Mar 2022 14:59:26 -0300 Subject: qemu/int128: add int128_urshift Implement an unsigned right shift for Int128 values and add the same tests cases of int128_rshift in the unit test. Signed-off-by: Matheus Ferst Reviewed-by: Richard Henderson Message-Id: <20220330175932.6995-3-matheus.ferst@eldorado.org.br> [danielhb: fixed long lines in test_urshift()] Signed-off-by: Daniel Henrique Barboza --- include/qemu/int128.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include/qemu') diff --git a/include/qemu/int128.h b/include/qemu/int128.h index 37e07fd6dd..1f82918c73 100644 --- a/include/qemu/int128.h +++ b/include/qemu/int128.h @@ -83,6 +83,11 @@ static inline Int128 int128_rshift(Int128 a, int n) return a >> n; } +static inline Int128 int128_urshift(Int128 a, int n) +{ + return (__uint128_t)a >> n; +} + static inline Int128 int128_lshift(Int128 a, int n) { return a << n; @@ -299,6 +304,20 @@ static inline Int128 int128_rshift(Int128 a, int n) } } +static inline Int128 int128_urshift(Int128 a, int n) +{ + uint64_t h = a.hi; + if (!n) { + return a; + } + h = h >> (n & 63); + if (n >= 64) { + return int128_make64(h); + } else { + return int128_make128((a.lo >> n) | ((uint64_t)a.hi << (64 - n)), h); + } +} + static inline Int128 int128_lshift(Int128 a, int n) { uint64_t l = a.lo << (n & 63); -- cgit v1.2.3