vxworks float EFs not precise enough -> use long float

Some acats-4 tests that check the precision of Float elementary
functions fail with vxworks 7.2's implementations of single-precision
math functions.

This patch arranges for us to bypass the single-precision functions,
and use the Aux_Long_Float implementation, based on the double-typed
calls from the C library, for Float and Short_Float.


for  gcc/ada/ChangeLog

	* Makefile.rtl (LIBGNAT_TARGET_PAIRS): Use Long Float-based
	variant of Aux_Short_Float and Aux_Float on vxworks targets.
	* libgnat/a-nashfl__wraplf.ads: New.
	* libgnat/a-nuaufl__wraplf.ads: New.

3 files changed, 182 insertions, 0 deletions

diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl
index fb7ecb1..04c7cc8 100644
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -1026,6 +1026,8 @@ ifeq ($(strip $(filter-out powerpc% wrs vxworks vxworksspe vxworks7% vxworks7spe
   LIBGNAT_TARGET_PAIRS = \
   a-intnam.ads<libgnarl/a-intnam__vxworks.ads \
   a-naliop.ads<libgnat/a-naliop__nolibm.ads \
+  a-nuaufl.ads<libgnat/a-nuaufl__wraplf.ads \
+  a-nashfl.ads<libgnat/a-nashfl__wraplf.ads \
   s-inmaop.adb<libgnarl/s-inmaop__vxworks.adb \
   s-intman.ads<libgnarl/s-intman__vxworks.ads \
   s-intman.adb<libgnarl/s-intman__vxworks.adb \
@@ -1149,6 +1151,8 @@ ifeq ($(strip $(filter-out powerpc% wrs vxworksae vxworksaespe,$(target_cpu) $(t
   a-elchha.adb<libgnat/a-elchha__vxworks-ppc-full.adb \
   a-intnam.ads<libgnarl/a-intnam__vxworks.ads \
   a-naliop.ads<libgnat/a-naliop__nolibm.ads \
+  a-nuaufl.ads<libgnat/a-nuaufl__wraplf.ads \
+  a-nashfl.ads<libgnat/a-nashfl__wraplf.ads \
   g-io.adb<hie/g-io__vxworks-cert.adb \
   s-inmaop.adb<libgnarl/s-inmaop__vxworks.adb \
   s-interr.adb<libgnarl/s-interr__vxworks.adb \
@@ -1205,6 +1209,8 @@ ifeq ($(strip $(filter-out %86 wrs vxworksae,$(target_cpu) $(target_vendor) $(ta
   a-elchha.adb<libgnat/a-elchha__vxworks-ppc-full.adb \
   a-intnam.ads<libgnarl/a-intnam__vxworks.ads \
   a-naliop.ads<libgnat/a-naliop__nolibm.ads \
+  a-nuaufl.ads<libgnat/a-nuaufl__wraplf.ads \
+  a-nashfl.ads<libgnat/a-nashfl__wraplf.ads \
   g-io.adb<hie/g-io__vxworks-cert.adb \
   s-inmaop.adb<libgnarl/s-inmaop__vxworks.adb \
   s-interr.adb<libgnarl/s-interr__vxworks.adb \
@@ -1425,6 +1431,8 @@ ifeq ($(strip $(filter-out aarch64 arm% coff wrs vx%,$(target_cpu) $(target_vend
   LIBGNAT_TARGET_PAIRS = \
   a-intnam.ads<libgnarl/a-intnam__vxworks.ads \
   a-naliop.ads<libgnat/a-naliop__nolibm.ads \
+  a-nuaufl.ads<libgnat/a-nuaufl__wraplf.ads \
+  a-nashfl.ads<libgnat/a-nashfl__wraplf.ads \
   s-inmaop.adb<libgnarl/s-inmaop__vxworks.adb \
   s-interr.adb<libgnarl/s-interr__vxworks.adb \
   s-intman.ads<libgnarl/s-intman__vxworks.ads \
diff --git a/gcc/ada/libgnat/a-nashfl__wraplf.ads b/gcc/ada/libgnat/a-nashfl__wraplf.ads
new file mode 100644
index 0000000..ca5b48d
--- /dev/null
+++ b/gcc/ada/libgnat/a-nashfl__wraplf.ads
@@ -0,0 +1,87 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--         A D A . N U M E R I C S . A U X _ S H O R T _ F L O A T          --
+--                                                                          --
+--                                 S p e c                                  --
+--                (Short Float Wrapper in terms of Long Float)              --
+--                                                                          --
+--          Copyright (C) 1992-2020, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides the basic computational interface for the
+--  generic elementary functions. The functions in this unit are
+--  wrappers for those in the Long Float package.
+
+with Ada.Numerics.Aux_Long_Float;
+
+package Ada.Numerics.Aux_Short_Float is
+   pragma Pure;
+
+   subtype T is Short_Float;
+   package Aux renames Ada.Numerics.Aux_Long_Float;
+   subtype W is Aux.T;
+
+   --  Use the Aux implementation.
+
+   function Sin (X : T) return T
+   is (T (Aux.Sin (W (X))));
+
+   function Cos (X : T) return T
+   is (T (Aux.Cos (W (X))));
+
+   function Tan (X : T) return T
+   is (T (Aux.Tan (W (X))));
+
+   function Exp (X : T) return T
+   is (T (Aux.Exp (W (X))));
+
+   function Sqrt (X : T) return T
+   is (T (Aux.Sqrt (W (X))));
+
+   function Log (X : T) return T
+   is (T (Aux.Log (W (X))));
+
+   function Acos (X : T) return T
+   is (T (Aux.Acos (W (X))));
+
+   function Asin (X : T) return T
+   is (T (Aux.Asin (W (X))));
+
+   function Atan (X : T) return T
+   is (T (Aux.Atan (W (X))));
+
+   function Sinh (X : T) return T
+   is (T (Aux.Sinh (W (X))));
+
+   function Cosh (X : T) return T
+   is (T (Aux.Cosh (W (X))));
+
+   function Tanh (X : T) return T
+   is (T (Aux.Tanh (W (X))));
+
+   function Pow (X, Y : T) return T
+   is (T (Aux.Pow (W (X), W (Y))));
+
+end Ada.Numerics.Aux_Short_Float;
diff --git a/gcc/ada/libgnat/a-nuaufl__wraplf.ads b/gcc/ada/libgnat/a-nuaufl__wraplf.ads
new file mode 100644
index 0000000..b6eb22c
--- /dev/null
+++ b/gcc/ada/libgnat/a-nuaufl__wraplf.ads
@@ -0,0 +1,87 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--               A D A . N U M E R I C S . A U X _ F L O A T                --
+--                                                                          --
+--                                 S p e c                                  --
+--                       (Double-based Version, Float)                      --
+--                                                                          --
+--          Copyright (C) 1992-2020, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides the basic computational interface for the
+--  generic elementary functions. The functions in this unit are
+--  wrappers for those in the Long_Float package.
+
+with Ada.Numerics.Aux_Long_Float;
+
+package Ada.Numerics.Aux_Float is
+   pragma Pure;
+
+   subtype T is Float;
+   package Aux renames Ada.Numerics.Aux_Long_Float;
+   subtype W is Aux.T;
+
+   --  Use the Aux implementation.
+
+   function Sin (X : T) return T
+   is (T (Aux.Sin (W (X))));
+
+   function Cos (X : T) return T
+   is (T (Aux.Cos (W (X))));
+
+   function Tan (X : T) return T
+   is (T (Aux.Tan (W (X))));
+
+   function Exp (X : T) return T
+   is (T (Aux.Exp (W (X))));
+
+   function Sqrt (X : T) return T
+   is (T (Aux.Sqrt (W (X))));
+
+   function Log (X : T) return T
+   is (T (Aux.Log (W (X))));
+
+   function Acos (X : T) return T
+   is (T (Aux.Acos (W (X))));
+
+   function Asin (X : T) return T
+   is (T (Aux.Asin (W (X))));
+
+   function Atan (X : T) return T
+   is (T (Aux.Atan (W (X))));
+
+   function Sinh (X : T) return T
+   is (T (Aux.Sinh (W (X))));
+
+   function Cosh (X : T) return T
+   is (T (Aux.Cosh (W (X))));
+
+   function Tanh (X : T) return T
+   is (T (Aux.Tanh (W (X))));
+
+   function Pow (X, Y : T) return T
+   is (T (Aux.Pow (W (X), W (Y))));
+
+end Ada.Numerics.Aux_Float;