All Questions
Tagged with floating-point arm
8 questions
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2
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Dealing with denorms in the ARM Cortex M4 FPU
Okay, a year ago I asked this other question and got zero responses.
Now, I will try to get a little more specific: The ARM chip that is in this product is the STM32F407 and I got the docs on that ...
- 1,695
4
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1
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ARM Cortex-M Floating Point Multiply-Accumulate Cycle Time
According to the ARM Cortex M4 technical manual, a floating point multiply accumulate instruction (VMLA.F32) takes 3 cycles. However the separate multiply (VMUL.F32) and add (VADD.F32) instructions ...
- 5,117
2
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1
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How does the ARM Compiler (Version 5) handle double-precision floats in devices whose floating-point unit hardware only supports single precision?
After reading ARM Compiler version 5's manual, it says that for devices without a floating point unit, floats are dealt with through software implementations, which is likely going to be slower than ...
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1
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How can I save a floating point value to a Microcontroller data Flash
I'm trying to save some floating values to the Data flash of my Nuc220(ARM-M0 32 bit) Microcontroller using ISP procedure.
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2
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2
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STM32 NaN value for floating point operations on global variables
I am trying to implement a simple Odometry computation loop. Which is being run in a while loop. Following is the code:
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- 85
3
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1
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How many cycles does an ARM Cortex M0 use to multiply floats?
On an ARM cortex m0+:
How many cycles does it take to perform multiplication of single precision floats and store them into a float? i.e. x = a*b; Where x, a, and b are single precision IEEE 754 ...
- 2,116
1
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0
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Float calculations hangs on Kinetis K20 (arm-m4-no-fpu) when PWM interrupt is on
I will use this ARM to control Induction Motor with three-phase inverter.
When the program encounters any float operations, like simple plus operation, the system hangs but the pause of debug works ...
user19978
5
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1
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Cortex-M4F FPU problems
I'm writing some code for a Texas Instruments Stellaris Launchpad board (a Cortex-M4F, the chip is a LM4F120H5QR). I'm using the IRMP library for infrared decoding, which works fine, as long as I don'...
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