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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 09279ec7af5..c1bbd7b84e3 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -8787,6 +8787,15 @@ point number to a signed fixed point number also convert validly to an unsigned one. @end defmac +@deftypefn {Target Hook} int TARGET_MIN_DIVISIONS_FOR_RECIP_MUL (enum machine_mode @var{mode}) +When @option{-ffast-math} is in effect, GCC tries to optimize +divisions by the same divisor, by turning them into multiplications by +the reciprocal. This target hook specifies the minimum number of divisions +that should be there for GCC to perform the optimization for a variable +of mode @var{mode}. The default implementation returns 3 if the machine +has an instruction for the division, and 2 if it does not. +@end deftypefn + @defmac MOVE_MAX The maximum number of bytes that a single instruction can move quickly between memory and registers or between two memory locations. |