ArmPkg/CompilerIntrinsicsLib: Remove unused sources and clean up .inf

[mirror_edk2.git] / ArmPkg / Library / CompilerIntrinsicsLib / Arm / clzsi2.c

diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/Arm/clzsi2.c b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/clzsi2.c
deleted file mode 100644 (file)
index d454748..0000000
--- a/ArmPkg/Library/CompilerIntrinsicsLib/Arm/clzsi2.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/** @file\r
-  Compiler intrinsic to return the number of leading zeros, ported from LLVM code.\r
-\r
-  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
-\r
-  SPDX-License-Identifier: BSD-2-Clause-Patent\r
-\r
-**/\r
-/**\r
-  University of Illinois/NCSA\r
-  Open Source License\r
-\r
-  Copyright (c) 2003-2008 University of Illinois at Urbana-Champaign.\r
-  All rights reserved.\r
-\r
-  Developed by:\r
-\r
-      LLVM Team\r
-\r
-      University of Illinois at Urbana-Champaign\r
-\r
-      http://llvm.org\r
-\r
-  Permission is hereby granted, free of charge, to any person obtaining a copy of\r
-  this software and associated documentation files (the "Software"), to deal with\r
-  the Software without restriction, including without limitation the rights to\r
-  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies\r
-  of the Software, and to permit persons to whom the Software is furnished to do\r
-  so, subject to the following conditions:\r
-\r
-      * Redistributions of source code must retain the above copyright notice,\r
-        this list of conditions and the following disclaimers.\r
-\r
-      * Redistributions in binary form must reproduce the above copyright notice,\r
-        this list of conditions and the following disclaimers in the\r
-        documentation and/or other materials provided with the distribution.\r
-\r
-      * Neither the names of the LLVM Team, University of Illinois at\r
-        Urbana-Champaign, nor the names of its contributors may be used to\r
-        endorse or promote products derived from this Software without specific\r
-        prior written permission.\r
-\r
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
-  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE\r
-  CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\r
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\r
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE\r
-  SOFTWARE.\r
-**/\r
-\r
-\r
-#include "Llvm_int_lib.h"\r
-\r
-// Returns: the number of leading 0-bits\r
-\r
-// Precondition: a != 0\r
-\r
-INT32\r
-__clzsi2(INT32 a)\r
-{\r
-    UINT32 x = (UINT32)a;\r
-    INT32 t = ((x & 0xFFFF0000) == 0) << 4;  // if (x is small) t = 16 else 0\r
-    x >>= 16 - t;      // x = [0 - 0xFFFF]\r
-    UINT32 r = t;       // r = [0, 16]\r
-    // return r + clz(x)\r
-    t = ((x & 0xFF00) == 0) << 3;\r
-    x >>= 8 - t;       // x = [0 - 0xFF]\r
-    r += t;            // r = [0, 8, 16, 24]\r
-    // return r + clz(x)\r
-    t = ((x & 0xF0) == 0) << 2;\r
-    x >>= 4 - t;       // x = [0 - 0xF]\r
-    r += t;            // r = [0, 4, 8, 12, 16, 20, 24, 28]\r
-    // return r + clz(x)\r
-    t = ((x & 0xC) == 0) << 1;\r
-    x >>= 2 - t;       // x = [0 - 3]\r
-    r += t;            // r = [0 - 30] and is even\r
-    // return r + clz(x)\r
-//     switch (x)\r
-//     {\r
-//     case 0:\r
-//         return r + 2;\r
-//     case 1:\r
-//         return r + 1;\r
-//     case 2:\r
-//     case 3:\r
-//         return r;\r
-//     }\r
-    return r + ((2 - x) & -((x & 2) == 0));\r
-}\r