# _mm256_testnzc_si256

Performs a packed bit test of two integer vectors to set ZF and CF flags. The corresponding Intel® AVX instruction is VPTEST.

## Syntax

extern int _mm256_testnzc_si256(__m256i s1, __m256i s2);

## Arguments

s1 | first source integer vector
s2 | second source integer vector

## Description

Performs a packed bit test of s1 and s2 vectors using VTESTPD s1, s2 instruction and checks the status of the ZF and CF flags. The intrinsic returns 1 if both ZF and CF flags are not 1 (that is, both flags are not set), otherwise returns 0 (that is, one of the flags is set) .

The VTESTPD instruction performs a bitwise comparison of all the sign bits of the integer elements in the first source operand and corresponding sign bits in the second source operand. If the AND of the first source operand sign bits with the second source operand sign bits produces all zeros, the ZF flag is set else the ZF flag is clear. If the AND of the inverted first source operand sign bits with the second source operand sign bits produces all zeros the CF flag is set, else the CF flag is clear.

## Returns

1: indicates that both ZF and CF flags are clear

0: indicates that either ZF or CF flag is set

Parent topic: Intrinsics for Packed Test Operations