Intel 64 and IA-32 Architectures Software Developers Manual Volume 2B, Instruction Set Reference, N-Z

Vol. 2B C-1
APPENDIX C
INTEL® C/C++ COMPILER INTRINSICS AND
FUNCTIONAL EQUIVALENTS
The two tables in this appendix itemize the Intel C/C++ compiler intrinsics and
functional equivalents for the Intel MMX technology, SSE, SSE2, SSE3, and SSSE3
instructions.
There may be additional intrinsics that do not have an instruction equivalent. It is
strongly recommended that the reader reference the compiler documentation for the
complete list of supported intrinsics. Please refer to
http://www.intel.com/support/performancetools/.
Table C-1 presents simple intrinsics and Table C-2 presents composite intrinsics.
Some intrinsics are “composites” because they require more than one instruction to
implement them.
Intel C/C++ Compiler intrinsic names reflect the following naming conventions:
_mm_<intrin_op>_<suffix>
where:
<intrin_op> Indicates the intrinsics basic operation; for example, add for
addition and sub for subtraction
<suffix> Denotes the type of data operated on by the instruction. The
first one or two letters of each suffix denotes whether the
data is packed (p), extended packed (ep), or scalar (s).
The remaining letters denote the type:
s single-precision floating point
d double-precision floating point
i128 signed 128-bit integer
i64 signed 64-bit integer
u64 unsigned 64-bit integer
i32 signed 32-bit integer
u32 unsigned 32-bit integer
i16 signed 16-bit integer
u16 unsigned 16-bit integer
i8 signed 8-bit integer
u8 unsigned 8-bit integer
The variable r is generally used for the intrinsic's return value. A number appended to
a variable name indicates the element of a packed object. For example, r0 is the
lowest word of r.