From 2484cd9c777f6877b178901bcb26663c411fc231 Mon Sep 17 00:00:00 2001 From: Matheus Ferst Date: Thu, 26 Aug 2021 11:56:55 -0300 Subject: [PATCH] include/qemu/int128.h: introduce bswap128s MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Changes the current bswap128 implementation to use __builtin_bswap128 when available, adds a bswap128 implementation for !CONFIG_INT128 builds, and introduces bswap128s based on bswap128. Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Peter Maydell Signed-off-by: Matheus Ferst Message-Id: <20210826145656.2507213-2-matheus.ferst@eldorado.org.br> Signed-off-by: David Gibson --- include/qemu/int128.h | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/include/qemu/int128.h b/include/qemu/int128.h index 17436d851d..2ac0746426 100644 --- a/include/qemu/int128.h +++ b/include/qemu/int128.h @@ -1,9 +1,9 @@ #ifndef INT128_H #define INT128_H -#ifdef CONFIG_INT128 #include "qemu/bswap.h" +#ifdef CONFIG_INT128 typedef __int128_t Int128; static inline Int128 int128_make64(uint64_t a) @@ -155,7 +155,11 @@ static inline void int128_subfrom(Int128 *a, Int128 b) static inline Int128 bswap128(Int128 a) { +#if __has_builtin(__builtin_bswap128) + return __builtin_bswap128(a); +#else return int128_make128(bswap64(int128_gethi(a)), bswap64(int128_getlo(a))); +#endif } #else /* !CONFIG_INT128 */ @@ -350,5 +354,16 @@ static inline void int128_subfrom(Int128 *a, Int128 b) *a = int128_sub(*a, b); } +static inline Int128 bswap128(Int128 a) +{ + return int128_make128(bswap64(a.hi), bswap64(a.lo)); +} + #endif /* CONFIG_INT128 */ + +static inline void bswap128s(Int128 *s) +{ + *s = bswap128(*s); +} + #endif /* INT128_H */