_mm_cmpunord_ss
Classification
SSE_ALL, Compare, CPUID Test: SSE
Header File
xmmintrin.h
Instruction
CMPSS xmm, xmm, imm8
Synopsis
 _mm_cmpunord_ss(__m128 a, __m128 b);
Description
Compare the lower single-precision (32-bit) floating-point elements in "a" and "b" to see if either is NaN, store the result in the lower element of "dst", and copy the upper 3 packed elements from "a" to the upper elements of "dst".
Operation
dst[31:0] := ( a[31:0] == NaN OR b[31:0] == NaN ) ? 0xFFFFFFFF : 0
dst[127:32] := a[127:32]