optabs.def: Add new optabs fmax_optab/fmin_optab.

2015-11-25  David Sherwood  <david.sherwood@arm.com>

        * optabs.def: Add new optabs fmax_optab/fmin_optab.
        * internal-fn.def: Add new fmax/fmin internal functions.
        * doc/md.texi: Add fmin and fmax patterns.

From-SVN: r230888

gcc/ChangeLog

+2015-11-25  David Sherwood  <david.sherwood@arm.com>
+
+	* optabs.def: Add new optabs fmax_optab/fmin_optab.
+	* internal-fn.def: Add new fmax/fmin internal functions.
+	* doc/md.texi: Add fmin and fmax patterns.
+
 2015-11-25  Jason Merrill  <jason@redhat.com>
 
 	PR c++/68385

gcc/doc/md.texi

@@ -4980,6 +4980,15 @@ Signed minimum and maximum operations.  When used with floating point,
 if both operands are zeros, or if either operand is @code{NaN}, then
 it is unspecified which of the two operands is returned as the result.
 
+@cindex @code{fmin@var{m}3} instruction pattern
+@cindex @code{fmax@var{m}3} instruction pattern
+@item @samp{fmin@var{m}3}, @samp{fmax@var{m}3}
+IEEE-conformant minimum and maximum operations.  If one operand is a quiet
+@code{NaN}, then the other operand is returned.  If both operands are quiet
+@code{NaN}, then a quiet @code{NaN} is returned.  In the case when gcc supports
+signalling @code{NaN} (-fsignaling-nans) an invalid floating point exception is
+raised and a quiet @code{NaN} is returned.
+
 @cindex @code{reduc_smin_@var{m}} instruction pattern
 @cindex @code{reduc_smax_@var{m}} instruction pattern
 @item @samp{reduc_smin_@var{m}}, @samp{reduc_smax_@var{m}}

gcc/internal-fn.def

@@ -125,6 +125,8 @@ DEF_INTERNAL_FLT_FN (FMOD, ECF_CONST, fmod, binary)
 DEF_INTERNAL_FLT_FN (POW, ECF_CONST, pow, binary)
 DEF_INTERNAL_FLT_FN (REMAINDER, ECF_CONST, remainder, binary)
 DEF_INTERNAL_FLT_FN (SCALB, ECF_CONST, scalb, binary)
+DEF_INTERNAL_FLT_FN (FMIN, ECF_CONST, fmin, binary)
+DEF_INTERNAL_FLT_FN (FMAX, ECF_CONST, fmax, binary)
 
 /* FP scales.  */
 DEF_INTERNAL_FLT_FN (LDEXP, ECF_CONST, ldexp, binary)

gcc/optabs.def

@@ -253,6 +253,10 @@ OPTAB_D (sin_optab, "sin$a2")
 OPTAB_D (sincos_optab, "sincos$a3")
 OPTAB_D (tan_optab, "tan$a2")
 
+/* C99 implementations of fmax/fmin.  */
+OPTAB_D (fmax_optab, "fmax$a3")
+OPTAB_D (fmin_optab, "fmin$a3")
+
 /* Vector reduction to a scalar.  */
 OPTAB_D (reduc_smax_scal_optab, "reduc_smax_scal_$a")
 OPTAB_D (reduc_smin_scal_optab, "reduc_smin_scal_$a")