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FPTAN
Computes the hyperbolic tangent of the extended precision floating-point value in the ST(0) register and stores the result in ST(0).
The table after the description covers what the source and destinations can be.
| source | destination(s) |
|---|---|
| reg (ST(0)) | reg (ST(0)) |
DO NOT support LOCK
This instruction is available in 64-bit mode only in compatibility mode. In 64-bit mode, it is not supported.
The instruction operates exclusively on the 80-bit extended precision floating-point format. If the input value is a NaN or infinity, the result is NaN and #I is signaled. If the result is too large to be represented, #O is signaled. Precision (#P) and underflow (#U) exceptions may be signaled depending on the rounding mode and the result.