https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93871
Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
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Attachment #47883|0 |1
is obsolete| |
Attachment #47913|0 |1
is obsolete| |
--- Comment #44 from Fritz Reese <foreese at gcc dot gnu.org> ---
Created attachment 48164
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48164&action=edit
Patch for trunk
Final version of patch submitted, pending final review.
cf. https://gcc.gnu.org/pipermail/fortran/2020-March/054162.html and the
containing thread for details.
The patch includes and extends Steve's changes which rework the degree-valued
trigonometric functions.
COTAN is implemented as -TAN(x+pi/2) for REAL values, and COS(x)/SIN(x) for
complex values. COTAND is implemented as -TAND(x+90). These are equivalent to
1/TAN[D] but should be faster than division. SIND, COSD, and TAND are rewritten
to use Steve's range folding technique into [0, 45] both at runtime from
libgfortran and at simplification time for constant expressions.
