include/linux/compiler-intel.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_COMPILER_TYPES_H
   3 #error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
   4 #endif
   5
   6 #ifdef __ECC
   7
   8 /* Some compiler specific definitions are overwritten here
   9  * for Intel ECC compiler
  10  */
  11
  12 #include <asm/intrinsics.h>
  13
  14 /* Intel ECC compiler doesn't support gcc specific asm stmts.
  15  * It uses intrinsics to do the equivalent things.
  16  */
  17 #undef barrier
  18 #undef barrier_data
  19 #undef RELOC_HIDE
  20 #undef OPTIMIZER_HIDE_VAR
  21
  22 #define barrier() __memory_barrier()
  23 #define barrier_data(ptr) barrier()
  24
  25 #define RELOC_HIDE(ptr, off)                                    \
  26   ({ unsigned long __ptr;                                       \
  27      __ptr = (unsigned long) (ptr);                             \
  28     (typeof(ptr)) (__ptr + (off)); })
  29
  30 /* This should act as an optimization barrier on var.
  31  * Given that this compiler does not have inline assembly, a compiler barrier
  32  * is the best we can do.
  33  */
  34 #define OPTIMIZER_HIDE_VAR(var) barrier()
  35
  36 /* Intel ECC compiler doesn't support __builtin_types_compatible_p() */
  37 #define __must_be_array(a) 0
  38
  39 #endif
  40
  41 #ifndef __HAVE_BUILTIN_BSWAP16__
  42 /* icc has this, but it's called _bswap16 */
  43 #define __HAVE_BUILTIN_BSWAP16__
  44 #define __builtin_bswap16 _bswap16
  45 #endif
  46
  47 /*
  48  * icc defines __GNUC__, but does not implement the builtin overflow checkers.
  49  */
  50 #undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW