Intrinsic Functions for Hitachi Microprocessors
The SH-4 microprocessor includes a number of functions that you can use intrinsically for faster programs. These functions aid mathematical computations. Programs that use intrinsic functions do not have the overhead of function calls, but may be larger because of the additional code created.
Note These functions are not available as intrinsic functions for use with SH-3.
To replace functions with their intrinsic (inline) forms, use the /Oi - Generate Intrinsic Functions option or the #pragma intrinsic.
The following table shows SH-4 microprocessor assembly language functions implemented as intrinsic functions.
| SH-4 instruction | Description |
|---|---|
| _Convolve | Compute the summation of two vectors |
| _Dot3dVW0 | Computes the inner product of a pair of three or four-dimensional vectors with the "w" coordinate forced to 0. |
| _Dot3dVW1 | Computes the inner product of a pair of three or four-dimensional vectors with the "w" coordinate forced to 1. |
| _Dot4dV | Computes the inner product of a pair of four-dimensional vectors. |
| __fmac | Multiply two float values and add to a third float value |
| _LoadMatrix | Load a 4x4 matrix into the extended floating-point register bank |
| __movca | Move with cache block allocation |
| _Multiply4dM | Multiply a 4x4 matrix by a 4x4 matrix |
| __prefetch | Load a 32-byte data block that begins at a 32-byte boundary to the cache |
| _SaveMatrix | Store the extended floating-point register bank into a 4x4 matrix |
| _XDMultMatrix | Multiply a 4x4 matrix by a 4x4 matrix |
| _XDXform3dV | Multiply a three-dimensional vector by a 3x3 matrix |
| _XDXform4dV | Multiply a four-dimensional vector by a 4x4 matrix |
| _Xform3dV | Multiply a three-dimensional vector by a 3x3 matrix |
| _Xform4dV | Multiply a four-dimensional vector by a 4x4 matrix |
See Also
Common Intrinsic Functions | Microprocessor-specific Intrinsic Functions | Intrinsic Functions for ARM Microprocessors | Intrinsic Functions for MIPS Microprocessors | Hitachi Guide
Last updated on Thursday, April 08, 2004
© 1992-2003 Microsoft Corporation. All rights reserved.