include/qemu/int128.h: introduce bswap128s
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 <philmd@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Message-Id: <20210826145656.2507213-2-matheus.ferst@eldorado.org.br> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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@ -1,9 +1,9 @@
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#ifndef INT128_H
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#define INT128_H
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#ifdef CONFIG_INT128
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#include "qemu/bswap.h"
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#ifdef CONFIG_INT128
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typedef __int128_t Int128;
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static inline Int128 int128_make64(uint64_t a)
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@ -155,7 +155,11 @@ static inline void int128_subfrom(Int128 *a, Int128 b)
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static inline Int128 bswap128(Int128 a)
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{
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#if __has_builtin(__builtin_bswap128)
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return __builtin_bswap128(a);
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#else
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return int128_make128(bswap64(int128_gethi(a)), bswap64(int128_getlo(a)));
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#endif
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}
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#else /* !CONFIG_INT128 */
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@ -350,5 +354,16 @@ static inline void int128_subfrom(Int128 *a, Int128 b)
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*a = int128_sub(*a, b);
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}
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static inline Int128 bswap128(Int128 a)
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{
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return int128_make128(bswap64(a.hi), bswap64(a.lo));
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}
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#endif /* CONFIG_INT128 */
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static inline void bswap128s(Int128 *s)
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{
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*s = bswap128(*s);
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}
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#endif /* INT128_H */
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