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-- --
-- Copyright (C) 2015, AdaCore --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions are --
-- met: --
-- 1. Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- 2. Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in --
-- the documentation and/or other materials provided with the --
-- distribution. --
-- 3. Neither the name of the copyright holder nor the names of its --
-- contributors may be used to endorse or promote products derived --
-- from this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
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-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, --
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-- --
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with System.Machine_Code; use System.Machine_Code;
with System; use System;
package body Cortex_M.FPU is
use ASCII;
----------
-- Sqrt --
----------
function Sqrt (X : Float) return Float is
Result : Float;
begin
Asm ("vsqrt.f32 %0, %1",
Inputs => (Float'Asm_Input ("w", X)), -- %1
Outputs => (Float'Asm_Output ("=w", Result)), -- %0
Volatile => True);
return Result;
end Sqrt;
-----------
-- FPSCR --
-----------
function FPSCR return Status_Control_Register is
Result : Status_Control_Register;
begin
Asm ("VMRS r3, FPSCR" & ASCII.LF & ASCII.HT &
"str r3, [%0]",
Inputs => (Address'Asm_Input ("r", Result'Address)), -- %0
Volatile => True,
Clobber => ("r3"));
return Result;
end FPSCR;
end Cortex_M.FPU;