Logical Shift Puns

It will be my first time working an overnight job and my hours will be from 2am-9am. My goal is to try and be up as much as possible when there’s daylight. I will also only be working three nights a week which I’m hoping the four nights off won’t mess with my sleeping schedule.

Thanks!

The arithmetic combinator >> operator performs an arithmetic shift. If you simply want to shift all the bits to the right (logical shift), it fails on negative numbers.

Here is a two-tick combinator implementation of logical right shift.

!blueprint https://gist.github.com/DaveMcW/22034e03283b4943f99dc9916263f0a6

let's say, a=000 and b=001

what will a<<b produce?

is it 001 or 010?

Hi all,

I have the following function:

B = A << 1

if msb(A) = '1' then

B = B xor 0x87

end

Where A and B are 128-bit numbers

Currently I have it implemented in VHDL like so:

B <= A(1 to 127) & '0';

Bxor <= B xor DBL_C; -- DBL_C = 0x87 constant

out_mux <= Bxor when A(0) = '1' else B;

I'd like to reduce the number of LUTs this function uses by breaking it up into 4 32-bit operations. I'm not exactly sure how to do it. My first guess is to have a 4-mux which selects each 32-bit word of A, shifts it. I am not sure how the shift would cascade left though, for example, word 3's MSB becomes word2's LSB. And how to do the XOR?

Feels like this should be trivial, but I can't figure it out.

I see that u/danconnolly's revision to implement OP_LSHIFT and OP_RSHIFT in ABC has been abandoned. However, the nChain/BSV developer has recently tweeted a claim that these new opcodes are scheduled for activation by ABC in May of 2019.

Can anyone from Bitcoin ABC (maybe u/deadalnix) confirm if ABC plans to implement OP_LSHIFT and OP_RSHIFT as logical shifts operating against arbitrary bytestrings rather than the original arithmetic versions? If so, can you provide the technical justification for eliminating the arithmetic function in favor of the logical variant?

I'm trying to recreate the java.util.Random function. Scroll down to next() and see that I need to do "(int)(seed >>> (48 - bits))" https://docs.oracle.com/javase/8/docs/api/java/util/Random.html The >>> is the logical right shift operator.

If it helps, the wiki says "In a logical shift, zeros are shifted in to replace the discarded bits. Therefore, the logical and arithmetic left-shifts are exactly the same.

However, as the logical right-shift inserts value 0 bits into the most significant bit, instead of copying the sign bit, it is ideal for unsigned binary numbers, while the arithmetic right-shift is ideal for signed two's complement binary numbers."

I need to do this for LONG (which is a 64 bit integer in Java) though and since all numbers in javascript are 64 bit floats that's a 53 bit mantissa so I have to use bigInt https://github.com/peterolson/BigInteger.js

I’m working on building a region from the ground up for my group, and the Professor of the region, Professor Acacia, is researching the ‘Type Shift Phenomenon’ which is my explanation for things like the Alolan Forms and the Galarian Forms. I’m looking for some logical Type Shift forms for known Pokemon, as my group and I are not big fans of using Fakemon. The setting is very Savanna heavy, light on rain in most regions, two big lakes, six big mesas where the main cities are, a giant mountain (like kilimanjaro), etc. Maybe a desert area with an Egytian flavor. Does anyone have suggestions for such a region? Best I could come up with was a Type shift Arbok , Poison / Dark that represents the Black Mamba.

(Sorry for repost, but my original post's title didn't specify the level of schooling, just "Computer Science". I removed the old one - sorry, honest mistake!)

I've been attempting the following problem for a while, but unfortunately made little progress:

Fill in the code for the following C function: Function sra performs an arithmetic right shift using a logical right shift (given by value xsrl), followed by other operations not including right shifts or division. You may use the computation 8 * sizeof(int) to determine w, the number of bits in data type int. The shift amount k can range from 0 to w - 1.

int sra(int x, int k) {

/* Perform shift logically */

int xsrl = (unsigned) x >> k;

}

The code is meant to work on systems of variable size, which is why I can't just assume 4-byte integers. I also can't use if statements, loops, comparators except for == and !=, or other higher-level programming constructs. The only library stuff I can access is INT_MAX and INT_MIN, which were useful for some earlier problems in the section but I don't think I need them here.

So far, here's what I have:

int sra(int x, int k) {

`/*Perform shift logically */`

`int xsrl = (unsigned) x >> k;`

`/*Currently the leading digits are definitely zeroes. What needs to be figured out, is whether the leading digit was formerly a one or a zero, and then change the digits accordingly.`

 `We know how many bits to the right it was shifted. So make a copy, called copysrl. */`

int copysrl = xsrl;

 `Shift copysrl LEFT k times.`

copysrl = copysrl << k;

 `Create an integer of value 1 called mostSignificantBit.`

 `Left shift mostSignificantBit w - 1 times, so you get 0x8000...0 as the result bit pattern.`

int mostSignificantBit = 1 << (sizeof(int) * 8 - 1);

 `mostSignificantBit = copysrl & mostSignificantBit. This will turn mostSignificantBit into either 0x8000...0 or 0x000...0, depending on whether the original int x had a 1 as its leading bit.`

mostSignificantBit = mostSignificantBit & copysrl;

}

At this point I hit something of a snag, and I suspect I've actually been going about the problem a bit incorrectly based on it. The one thing I'm sure of is that I need to somehow take xsrl and extract the information about whether its most significant bit was a 1 or a 0, since that's the key to getting an arithmetic right shift. My code does this currently, and th

Hi reddit, first time posting here and this is a big one that i've believed for a while. First off let me explain what possiblianism is:

"Our ignorance of the cosmos is too vast to commit to atheism, and yet we know too much to commit to a particular religion. A third position, agnosticism, is often an uninteresting stance in which a person simply questions whether his traditional religious story (say, a man with a beard on a cloud) is true or not true. But with Possibilianism I'm hoping to define a new position -- one that emphasizes the exploration of new, unconsidered possibilities. Possibilianism is comfortable holding multiple ideas in mind; it is not interested in committing to any particular story." - David Eaglemen

Now, some of my favorite writers such as Sam Harris have stated that this belief system is simply atheism in a new shell. I disagree. I've found that the word Atheism means that a god/gods doesn't exist and that there isn't a chance of any form of it. Even Richard Dawkins has stated in the God Delusion that Atheists today are not full blown atheists in the sense that they are not on the pure opposite side of the spectrum of creationist who are 100% certain there is a god. Its normally around 99% percent or so which makes me feel that the word atheism which comes from the Greek language "Without God" isn't appropriate for where most of us already stand. Perhaps it is more of a defintional thing, but the idea of holding all ideas with value and using what we know about the world to shift our views on the spectrum of Belief

I---------------------------------------------I Belief Non- Belief

I find that perhaps it is unlikely, but we certainly do not have the evidence to support that a god or gods doesnt exist. I originally registered myself as an atheist, but after coming across this term a few years ago this is where I have stood.

I've always felt that this term better explained how many atheists felt, but most of us didn't know it actually existed.

CMV reddit

Acknowledging the replacement of Bitcoin's original arithmetic OP_LSHIFT and OP_RSHIFT opcodes with new truncated logical operations, BSV developer u/danconnolly had this to say:

> For the LSHIFT and RSHIFT opcodes, these opcodes were updated to be bitwise operators which means that they operate on byte sequences, not numeric values. This means that they do not have special treatment for the sign bit and they don’t overflow or underflow. They operate on all sizes of byte sequences, from zero-length up to the maximum element size (520 bytes).

> Previously, the LSHIFT and RSHIFT operated on numeric values. This same functionality can be achieved through the use of script, possibly including the bitwise LSHIFT and RSHIFT opcodes.

https://www.reddit.com/r/btc/comments/9ce492/bsvs_new_op_lshift_and_op_rshift_are_not/e5b9vpe

He goes on to provide an example of Script that could be used to simulate Satoshi's intended functionality. This plainly requires many times more steps to perform what was meant to be a simple operation, inflating the size and complexity of scripts making use of Satoshi's original design, not to mention the cost to perform these basic operations.

Just as arithmetic shifts can be performed using complex chunks of Script in place of the designated opcode, logical shifts can be performed using other basic operations. In fact, logical shifts are much easier to simulate as they are nothing more than multiplication or division by a power of 2. Furthermore, BSV eliminated the OP_2MUL and OP_2DIV opcodes which are identical to the special case of logically shifting left or right by one, respectively. If logical shifts are of such vital functionality that they require subsidized and dedicated opcodes, there is no reason the deprecated opcodes could not have been repurposed as logical shift operators while retaining the arithmetic counterparts.

Not only does BSV alter Satoshi's original protocol by introducing these novel operations, it does so as a centrally planned economic change. In the guise of "achiev[ing] balance between minimizing the number of opcodes and providing the functionality" BSV diverges from Satoshi's vision as implemented in his original client, applying a disproportionate penality on performing the intended functionality while BSV's preferred operations benefit from a subsidy.

After a 50% water change my parameters are ph:8.1, Ca:430, Alk:8.6, Mg:1400. Salinity: 35, Temp: 25C. After the new water, I did not dose anything for 3 days.

In those three days, my alkalinity dropped 1.9 dkh, from 8.6 to 6.7. Calcium dropped 55 ppm, to 375.

This calculator tells me that my system (35 gallons) needs 2.2 liters of saturated limewater to make up 1.9 dkh. My tank needs 2200 mL, so that's 733 mL of kalk dosing each day.

That must be wrong. It's way too much kalk. My system is 11 months young and contains soft coral and lps frags. It's a light load by any stretch of the imagination. There's just no way that much calcium and alkalinity are being consumed.

I seem to have two problems. One problem is that my kalkwasser dosing is flawed. Second problem is I seem to be getting precipitation.

Please help. My corals know no stability.

From there, you can move between the different Menu categories (File, Edit, Track, etc) with the left/right arrow keys. Once in a category, you can navigate between the menu items with the up/down keys and hit Return or Spacebar to open up any of the items.

Even better, after hitting Shift Command / and type in any menu item directly into the Search box. Again, navigate between the Search results using the arrow keys and press Return or Spacebar to open up the selected menu item.

You can of course also search for Help Topics with Shift Command / as well which is its main function.

The Shift Command / key command works in most apps, native or third party. Try it out! :)

That list has to end eventually.

If you work 4 hours you get 1 break. If you work 6 hours your get 1 break and 1 lunch. If you work 8 hours you get 2 breaks and a lunch. So if you work 10 shouldn’t you get a 3rd break And of course 12 is a 2nd lunch so why wouldn’t you get another break?

I had a question about automating pitch shifting in logic. I know there's a vst that comes with logic for this, but when you automate it, seems you can only do so in steps.

Is there a way (like in abelton) to automate in pitch shifts so they happen as a continuum, rather than in steps of semitones. Almost like playing with a pitch bend on a keyboard or synth.

I feel like this is a pretty common function people use in electronic music... So surely there must be a way?

I've been googling for a few hours but can't quite seem to find an answer to my question.

I know the ESP32 isn't 5v tolerant, and therefore any 5v modules you connect to the GPIO pins needs to be done through something like a level shifter.

My questions:

1. For i2c devices powered via 5v, I assume both the SDA and SCL lines need level shifting?

2. For SPI devices powered via 5v, I assume all SCLK, MOSI, MISO, CS all need level shifting?

Thanks

Hello. First, I’m not trying to offend any of you guys. So please just know that it’s not my intention to anger anyone. This is just a post. If you don’t like it, you can just ignore it if you’d like. Otherwise, thank you for taking the time to read it!

I have been reading about astral projection on and off over the last 6ish years. I’ve had some weird experiences with “rolling out” of my body into what I assumed to be a lucid dream. It always feels fake and dreamlike(almost always, but my self awareness is always lower than in ‘real life’), and my awareness and logic is always lower. To the best of my knowledge, I’ve never shifted or astral projected, since it’s always a dull feeling.

Not long ago(a couple of months maybe?) I read about shifting. I’ve always believed in the possibility of alternate universes, but this whole tiktock trend is very toxic, so it’s all very questionable.

The problem is that everyone claims different things, such as the meaning behind shifting, if you can learn another language there and bring back that knowledge, etc. Many people also claim the legitimacy of their experience, by saying “omg, I shifted!! It’s real!”. But they fail to give any logical, down-to-earth details. Not one single person’s post on this subreddit(that I’ve seen) has been truly logical and detailed. It’s always the same copy-paste posts about how they went to hogwarts or an anime universe. Yet, the very few details they provide strongly indicate it was a lucid dream. And then there’s the whole ‘thing’ regarding if shifting is a subjective(separate from other peoples’ or beings’ experiences. It’s created by your own subconscious), or objective(independent of yourself or brain) phenomenon. Most people are very cryptic when it comes to this stuff. They don’t like to directly answer if it’s your brain creating the experience, or if your consciousness is literally leaving your physical body, although most people seem to lean towards the latter(leaving your body, literally). Of course, some people do directly answer if it’s objectively real or not. However, they provide no basis as to how they know this. It’s quite irritating to people who want to truly learn about this from a logical perspective.

So I ask you Shifters(only people who think or “know” that you’ve shifted) to please share your experiences and answer the following questions in plain English. Please try to be logical.

1. Is shifting a subjective or objective experience?

2. Have you actua

I’ve been using Garageband and a modeller(Hotone Ampero) to record my guitar, vocal bass tracks, as well as using the software drummer tracks that are included.

Just wondering if it is worth investing the money, and upgrading/buying logic? Am very much a pro/con kind of person here.

Thanks!

what i mean to say is, how are there infinite realities?? i know we can shift our consciousness into the quantum feild, but if there were really infinite realities, wouldnt there be a reality where someone presses a button and, lets just say other realities are affected? so, can other realities affect eachother?? like in one reality someone presses a button and everyone in another realitys hair turns pink or something??? that leads me to wonder, can realities affect eachother?? i would love to know