From 41a4ef2243b0128f6f35b3da8f7d18a609a923ea Mon Sep 17 00:00:00 2001
From: Kirill Yukhin <kirill.yukhin@intel.com>
Date: Thu, 24 Dec 2015 11:05:34 +0000
Subject: Introduce support for PKU instructions.

gcc/
	* common/config/i386/i386-common.c (OPTION_MASK_ISA_PKU_SET): New.
	(OPTION_MASK_ISA_PKU_UNSET): Ditto.
	(ix86_handle_option): Handle OPT_mpku.
	* config.gcc: Add pkuintrin.h to i[34567]86-*-* and x86_64-*-*
	targets.
	* config/i386/cpuid.h (host_detect_local_cpu): Detect PKU feature.
	* config/i386/i386-c.c (ix86_target_macros_internal): Handle PKU ISA
	flag.
	* config/i386/i386.c (ix86_target_string): Add "-mpku" to
	ix86_target_opts.
	(ix86_option_override_internal): Define PTA_PKU, mention new key
	in skylake-avx512. Handle new ISA bits.
	(ix86_valid_target_attribute_inner_p): Add "pku".
	(enum ix86_builtins): Add IX86_BUILTIN_RDPKRU and IX86_BUILTIN_WRPKRU.
	(builtin_description bdesc_special_args[]): Add new built-ins.
	* config/i386/i386.h (define TARGET_PKU): New.
	(define TARGET_PKU_P): Ditto.
	* config/i386/i386.md (define_c_enum "unspecv"): Add UNSPEC_PKU.
	(define_expand "rdpkru"): New.
	(define_insn "*rdpkru"): Ditto.
	(define_expand "wrpkru"): Ditto.
	(define_insn "*wrpkru"): Ditto.
	* config/i386/i386.opt (mpku): Ditto.
	* config/i386/pkuintrin.h: New file.
	* config/i386/x86intrin.h: Include pkuintrin.h
	* doc/extend.texi: Describe new built-ins.
	* doc/invoke.texi: Describe new switches.
gcc/testsuite/
	* g++.dg/other/i386-2.C: Add -mpku.
	* g++.dg/other/i386-3.C: Ditto.
	* gcc.target/i386/rdpku-1.c: New test.
	* gcc.target/i386/sse-12.c: Add -mpku.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-22.c: Ditto.
	* gcc.target/i386/sse-33.c: Ditto.
	* gcc.target/i386/wrpku-1.c: New test.

From-SVN: r231944
---
 gcc/doc/extend.texi | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'gcc/doc/extend.texi')

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 883d9b3..4578925 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -18343,6 +18343,13 @@ All of them generate the machine instruction that is part of the name.
 void __builtin_i32_clzero (void *)
 @end smallexample
 
+The following built-in functions are available when @option{-mpku} is used.
+They generate reads and writes to PKRU.
+@smallexample
+void __builtin_ia32_wrpkru (unsigned int)
+unsigned int __builtin_ia32_rdpkru ()
+@end smallexample
+
 @node x86 transactional memory intrinsics
 @subsection x86 Transactional Memory Intrinsics
 
-- 
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