oadGeneral(src_tex, coordS, params.mipLevel).r;
    v[0] = texel0;
}

if (coordE.x < srcBoundary.x) {
    // coordE is used
    mask &= 0x0000ffffu;
    let texel1 = textureLoadGeneral(src_tex, coordE, params.mipLevel).r;
    v[1] = texel1;
}

if (readDstBufAtStart || readDstBufAtEnd) {
    let original: u32 = dst_buf[dstOffset];
    result = (original & mask) | (encodeVectorInU32General(v) & ~mask);
} else {
    result = encodeVectorInU32General(v);
}