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INSTRUCTION SET REFERENCE
PUNPCKLBW/PUNPCKLWD/PUNPCKLDQ—Unpack Low Packed
Data (Continued)
Intel C/C++ Compiler Intrinsic Equivalents
Pre-4.0 Intel C/C++ Compiler intrinsic:
__m64 _m_punpcklbw (__m64 m1, __m64 m2)
Version 4.0 and later Intel C/C++ Compiler intrinsic:
__m64 _mm_unpcklo_pi8 (__m64 m1, __m64 m2)
Interleave the four 8-bit values from the low half of m1 with the four values from the low half
of m2 and take the least significant element from m1.
Pre-4.0 Intel C/C++ Compiler intrinsic:
__m64 _m_punpcklwd (__m64 m1, __m64 m2)
Version 4.0 and later Intel C/C++ Compiler intrinsic:
__m64 _mm_unpcklo_pi16 (__m64 m1, __m64 m2)
Interleave the two 16-bit values from the low half of m1 with the two values from the low half
of m2 and take the least significant element from m1.
Pre-4.0 Intel C/C++ Compiler intrinsic:
__m64 _m_punpckldq (__m64 m1, __m64 m2)
Version 4.0 and later Intel C/C++ Compiler intrinsic:
__m64 _mm_unpcklo_pi32 (__m64 m1, __m64 m2)
Interleave the 32-bit value from the low half of m1 with the 32-bit value from the low half of
m2 and take the least significant element from m1.
Protected Mode Exceptions
#GP(0)
If a memory operand effective address is outside the CS, DS, ES, FS, or
GS segment limit.
#SS(0)
If a memory operand effective address is outside the SS segment limit.
#UD
If EM in CR0 is set.
#NM
If TS in CR0 is set.
#MF
If there is a pending FPU exception.
#PF(fault-code)If a page fault occurs.
#AC(0)
If alignment checking is enabled and an unaligned memory reference is
made while the current privilege level is 3.
