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Assembler User Guide
The effects of using flush-to-zero mode
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| Home > VFP Programming > The effects of using flush-to-zero mode | |||
With certain exceptions, flush-to-zero mode has the following effects on floating-point operations:
A denormalized number is treated as 0 when used as an input to a floating-point operation. The source register is not altered.
If the result of a single-precision floating-point operation, before rounding, is in the range -2-126 to +2-126, it is replaced by 0.
If the result of a double-precision floating-point operation, before rounding, is in the range -2-1022 to +2-1022, it is replaced by 0.
An inexact exception occurs whenever a denormalized number is used as an operand, or a result is flushed to zero. Underflow exceptions do not occur in flush-to-zero mode.
See also| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0379D |
| Non-Confidential | ID062912 |
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