_mm_testc_pd
Classification
AVX_ALL, Logical, CPUID Test: AVX
Header File
immintrin.h
Instruction
VTESTPD xmm, xmm
Synopsis
 _mm_testc_pd(__m128d a, __m128d b);
Description
Compute the bitwise AND of 128 bits (representing double-precision (64-bit) floating-point elements) in "a" and "b", producing an intermediate 128-bit value, and set "ZF" to 1 if the sign bit of each 64-bit element in the intermediate value is zero, otherwise set "ZF" to 0. Compute the bitwise NOT of "a" and then AND with "b", producing an intermediate value, and set "CF" to 1 if the sign bit of each 64-bit element in the intermediate value is zero, otherwise set "CF" to 0. Return the "CF" value.
Operation
tmp[127:0] := a[127:0] AND b[127:0]
IF (tmp[63] == 0 && tmp[127] == 0)
	ZF := 1
ELSE
	ZF := 0
FI
tmp[127:0] := (NOT a[127:0]) AND b[127:0]
IF (tmp[63] == 0 && tmp[127] == 0)
	CF := 1
ELSE
	CF := 0
FI
dst := CF