Common Intrinsics
The following table shows functions with a description of the purpose of each.
| Programming element | Description |
|---|---|
| _byteswap_uint64 | This function returns the argument value with its bytes in reverse order. |
| _byteswap_ulong | This function returns the argument value with its bytes in reverse order. |
| _byteswap_ushort | This function returns the argument value with its bytes in reverse order. |
| _CacheRelease | This function writes the cache line containing the address referenced by the pointer to main memory, and then marks the cache line as empty. |
| _CacheWriteBack | This function writes the cache line containing the address referenced by the pointer to main memory. |
| _CopyDoubleFromInt64 | This function copies a long integer into a floating-point double register. |
| _CopyFloatFromInt32 | This function copies an integer value to a floating-point register. |
| _CopyInt32FromFloat | This function copies a floating-point number into an integer register. |
| _CopyInt64FromDouble | This function copies a floating-point double to a long integer register. |
| _CountLeadingOnes | This function returns the number of contiguous one bits starting with the most significant bit. |
| _CountLeadingOnes64 | This function returns the number of contiguous one bits starting with the most significant bit. |
| _CountLeadingSigns | This function returns the number of contiguous bits that match the sign bit, starting with the next most significant bit. |
| _CountLeadingSigns64 | This function returns the number of contiguous bits that match the sign bit, starting with the next most significant bit. |
| _CountLeadingZeros | This function returns the number of contiguous zero bits starting with the most significant bit in the argument. |
| _CountLeadingZeros64 | This function returns the number of contiguous zero bits starting with the most significant bit in a 64-bit integer argument. |
| _CountOneBits | This function returns the number of one bits in the argument. |
| _CountOneBits64 | This function returns the number of one bits in a 64-bit integer argument. |
| _debugbreak | This function causes a debug breakpoint exception to be inserted. |
| _ICacheRefresh | This function releases the cache line containing the address referenced by the pointer from the instruction cache. |
| _isunordered | This function compares two double precision numbers to determine if they are unordered. |
| _isunorderedf | This function compares two floating-point numbers to determine if they are unordered. |
| _MulHigh | This function returns the high-order 32-bit result of multiplying two arguments. |
| _MulUnsignedHigh | This function returns the high-order 32-bit result of multiplying two unsigned arguments. |
| _prefetch | This function loads the data cache from main memory, if possible. |
| _ReadWriteBarrier | This function forces all previous memory accesses to complete before any subsequent memory access is started. |
| _trap | This function inserts a trap instruction. |
| _WriteBarrier | This function forces all previous memory write operations to complete before any subsequent write operation is started. |
Last updated on Thursday, April 08, 2004
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