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Vol. 2A 3-677
INSTRUCTION SET REFERENCE, A-M
MOVSHDUP—Move Packed Single-FP High and Duplicate
Operation
IF (Source == m128)
THEN (* Load instruction *)
xmm1[31:0] = m128[63:32];
xmm1[63:32] = m128[63:32];
xmm1[95:64] = m128[127:96];
xmm1[127:96] = m128[127:96];
ELSE (* Move instruction *)
xmm1[31:0] = xmm2[63:32];
xmm1[63:32] = xmm2[63:32];
xmm1[95:64] = xmm2[127:96];
xmm1[127:96] = xmm2[127:96];
FI;
Intel C/C++ Compiler Intrinsic Equivalent
MOVSHDUP __m128 _mm_movehdup_ps(__m128 a)
Exceptions
General protection exception if not aligned on 16-byte boundary, regardless of
segment.
Numeric Exceptions
None
Protected Mode Exceptions
#GP(0) For an illegal memory operand effective address in the CS, DS,
ES, FS or GS segments.
If memory operand is not aligned on a 16-byte boundary,
regardless of segment.
#SS(0) For an illegal address in the SS segment.
#PF(fault-code) For a page fault.
#NM If CR0.TS[bit 3] = 1.
#UD If CR0.EM[bit 2] = 1.
If CR4.OSFXSR[bit 9] = 0.
If CPUID.01H:ECX.SSE3[bit 0] = 0.
If the LOCK prefix is used.