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Add generic __builtin_bswap32 function

This commit is contained in:
Eddie Hung 2019-06-28 09:59:47 -07:00
parent 524af21317
commit 38d8806bd7
1 changed files with 15 additions and 0 deletions
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15
backends/aiger/xaiger.cc
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@ -25,6 +25,21 @@
#elif defined(__APPLE__) #elif defined(__APPLE__)
#include <libkern/OSByteOrder.h> #include <libkern/OSByteOrder.h>
#define __builtin_bswap32 OSSwapInt32 #define __builtin_bswap32 OSSwapInt32
#elif !defined(__GNUC__)
#include <cstdint>
inline uint32_t __builtin_bswap32(uint32_t x)
{
// https://stackoverflow.com/a/27796212
register uint32_t value = number_to_be_reversed;
uint8_t lolo = (value >> 0) & 0xFF;
uint8_t lohi = (value >> 8) & 0xFF;
uint8_t hilo = (value >> 16) & 0xFF;
uint8_t hihi = (value >> 24) & 0xFF;
return (hihi << 24)
| (hilo << 16)
| (lohi << 8)
| (lolo << 0);
}
#endif #endif
#include "kernel/yosys.h" #include "kernel/yosys.h"