89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
#ifndef UTIL_H
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#define UTIL_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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// C11 noreturn doesn't work in C++
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#define noreturn __attribute__((noreturn))
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#define min(x, y) ({ \
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__typeof__(x) _x = (x); \
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__typeof__(y) _y = (y); \
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(void) (&_x == &_y); \
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_x < _y ? _x : _y; })
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#define max(x, y) ({ \
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__typeof__(x) _x = (x); \
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__typeof__(y) _y = (y); \
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(void) (&_x == &_y); \
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_x > _y ? _x : _y; })
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#define COLD __attribute__((cold))
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#define UNUSED __attribute__((unused))
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#define EXPORT __attribute__((visibility("default")))
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#define STRINGIFY(s) #s
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#define ALIAS(f) __attribute__((alias(STRINGIFY(f))))
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typedef uint8_t u8;
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typedef uint16_t u16;
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typedef uint32_t u32;
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typedef uint64_t u64;
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typedef unsigned __int128 u128;
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#define U64_WIDTH 64
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static inline int ffz64(u64 x) {
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return __builtin_ffsll(~x);
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}
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// parameter must not be 0
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static inline int clz64(u64 x) {
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return __builtin_clzll(x);
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}
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// parameter must not be 0
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static inline u64 log2u64(u64 x) {
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return U64_WIDTH - clz64(x) - 1;
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}
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static inline size_t align(size_t size, size_t align) {
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size_t mask = align - 1;
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return (size + mask) & ~mask;
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}
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// u4_arr_{set,get} are helper functions for using u8 array as an array of unsigned 4-bit values.
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// val is treated as a 4-bit value
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static inline void u4_arr_set(u8 *arr, size_t idx, u8 val) {
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size_t off = idx >> 1;
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size_t shift = (idx & 1) << 2;
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u8 mask = (u8) (0xf0 >> shift);
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arr[off] = (arr[off] & mask) | (val << shift);
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}
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static inline u8 u4_arr_get(const u8 *arr, size_t idx) {
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size_t off = idx >> 1;
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size_t shift = (idx & 1) << 2;
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return (u8) ((arr[off] >> shift) & 0xf);
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}
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COLD noreturn void fatal_error(const char *s);
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#if CONFIG_SEAL_METADATA
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#ifdef __GLIBC__
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#define USE_PKEY
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#else
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#error "CONFIG_SEAL_METADATA requires Memory Protection Key support"
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#endif
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#endif // CONFIG_SEAL_METADATA
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#endif
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