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[PATCH, middle-end/i386]: Fix PR88556, Inline built-in sinh, cosh, tanh for -ffast-math


Attached patch inlines calls to asinh{,f,l}, acosh{,f,l} and
atanh{,f,l} using x87 XFmode arithmetic. The expanders are modelled
after the removed inlines in glibc [1].

2018-12-20  Uros Bizjak  <ubizjak@gmail.com>

    PR target/88556
    * internal-fn.def (COSH): New.
    (SINH): Ditto.
    (TANH): Ditto.
    * optabs.def (cosh_optab): New.
    (sinh_optab): Ditto.
    (tanh_optab): Ditto.
    * config/i386/i386-protos.h (ix86_emit_i387_sinh): New prototype.
    (ix86_emit_i387_cosh): Ditto.
    (ix86_emit_i387_tanh): Ditto.
    * config/i386/i386.c (ix86_emit_i387_sinh): New function.
    (ix86_emit_i387_cosh): Ditto.
    (ix86_emit_i387_tanh): Ditto.
    * config/i386/i386.md (sinhxf2): New expander.
    (sinh<mode>2):    Ditto.
    (coshxf2): Ditto.
    (cosh<mode>2): Ditto.
    (tanhxf2): Ditto.
    (tanh<mode>2): Ditto.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

The patch also needs approval for its straightforward middle-end parts.

[1] https://sourceware.org/ml/libc-alpha/2018-12/msg00772.html

Uros.

Attachment: p.diff.txt
Description: Text document


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