FMA(3G)                         [FIXME: manual]                        FMA(3G)

NAME
       fma - perform a fused multiply-add operation

DECLARATION
       genType fma(genType a, genType b, genType c);

       genDType fma(genDType a, genDType b, genDType c);

PARAMETERS
       a
           Specifies the first multiplicand.

       b
           Specifies the second multiplicand.

       c
           Specifies the value to be added to the result.

DESCRIPTION
       fma performs, where possible, a fused multiply-add operation, returning
       a * b + c. In use cases where the return value is eventually consumed
       by a variable declared as precise:

       o   fma() is considered a single operation, whereas the expression a *
           b + c consumed by a variable declared as precise is considered two
           operations.

       o   The precision of fma() can differ from the precision of the
           expression a * b + c.

       o   fma() will be computed with the same precision as any other fma()
           consumed by a precise variable, giving invariant results for the
           same input values of a, b and c.

       Otherwise, in the absence of precise consumption, there are no special
       constraints on the number of operations or difference in precision
       between fma() and the expression a * b + c.

VERSION SUPPORT

       +-----------+-----------------------------------------------------------------------------------+
       |           |                          OpenGL Shading Language Version                          |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+
       |Function   | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 |
       |Name       |      |      |      |      |      |      |      |      |      |      |      |      |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+
       |fma        |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       |(genType)  |      |      |      |      |      |      |      |      |      |      |      |      |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+
       |fma        |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       |(genDType) |      |      |      |      |      |      |      |      |      |      |      |      |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group. This material may be distributed
       subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group

[FIXME: source]                   05/21/2022                           FMA(3G)