I'm using McPAT, a tool for estimating CPU power, however, it seems the integer multiplier is counted as a special function unit. Why is that? Shouldnt it be in the integer unit instead? And shouldn't special function unit only be concerned with transcendental functions such as sin, cos, rcp?
Is integer multiplier physically in integer unit or special function unit?
237 Views Asked by zheric At
1
There are 1 best solutions below
Related Questions in CPU
- 1MiB = 1024KiB = 2^10. Nonetheless, why not use just 1000 byte instead 1024 to calculate size?
- What is the simplest Turing complete CPU instruction set which can execute code from ROM?
- How to get CPU utilization in % in terminal (mac)
- Avoiding CPU Contention
- Lots of cache miss, Sparse matrix multiplication
- CPU new features enabled in Linux kernel
- Are correct branch predictions free?
- NUMA support on which CPU? What are the current server configuration of this kind of CPU?
- How to deal with virtual address when trying to get memory access pattern statistics?
- On x86, does enabling paging cause an "unconditional jump" (since EIP is now a virtual address)?
- cpu load when setting textbox value
- CPU usage exceeding 100% in top command third line
- 32bit cpu: how much memory can it use?
- CMOS Scaling vs Die Shrink
- Meaning of cores and logical processors in intel icore
Related Questions in INTEGER-ARITHMETIC
- 32 bit signed integer division gives 0x7fffffff as quotient on PowerPC
- Exact sum of a long array
- Arithmetic on a struct representing a large integer
- C++ Number theory: Fastest way to compute max(y = a_i * x+ b_i) <= k
- Calculating the modulo of two intervals
- Panicked at 'attempt to subtract with overflow' when cycling backwards though a list
- Checksum without logic/bitwise operations
- perl - int() decrementing an integer
- Large Integer Arithmetic - how to implement modulo?
- Nicer arithmetics on primitive types in Rust
- Safely add, subtract divide unsigned chars
- how to change Map<String,String> to Map<String,Ratio> with ratio being x/y
- regex to get numerator and denominator for a ratio x/y
- When to pick 'Natural' over 'Integer' in Haskell?
- How to do arithmetic modulo another number, without overflow?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Integer multiplication is often pipelined, making it take multiple cycles to complete. As such, breaking it out into its own functional unit allows other integer operations (e.g, add/sub and bitwise operations) to run in a single cycle, possibly even while a multiply is in flight.
It's certainly not true that it's always a separate functional unit, though! Some CPUs (even small ones, like the ARM Cortex-M3 and M4 microcontrollers) have single-cycle multiply, which could very well be handled as part of the same FU as other integer operations.