Add -mmwait so that the MWAIT and MONITOR intrinsics can be used with
-mgeneral-regs-only and make -msse3 to imply -mmwait.
gcc/
* config.gcc: Install mwaitintrin.h for i[34567]86-*-* and
x86_64-*-* targets.
* common/config/i386/i386-common.c (OPTION_MASK_ISA2_MWAIT_SET):
New.
(OPTION_MASK_ISA2_MWAIT_UNSET): Likewise.
(ix86_handle_option): Handle -mmwait.
* config/i386/i386-builtins.c (ix86_init_mmx_sse_builtins):
Replace OPTION_MASK_ISA_SSE3 with OPTION_MASK_ISA2_MWAIT on
__builtin_ia32_monitor and __builtin_ia32_mwait.
* config/i386/i386-options.c (isa2_opts): Add -mmwait.
(ix86_valid_target_attribute_inner_p): Likewise.
(ix86_option_override_internal): Enable mwait/monitor
instructions for -msse3.
* config/i386/i386.h (TARGET_MWAIT): New.
(TARGET_MWAIT_P): Likewise.
* config/i386/i386.opt: Add -mmwait.
* config/i386/mwaitintrin.h: New file.
* config/i386/pmmintrin.h: Include <mwaitintrin.h>.
* config/i386/sse.md (sse3_mwait): Replace TARGET_SSE3 with
TARGET_MWAIT.
(@sse3_monitor_<mode>): Likewise.
* config/i386/x86gprintrin.h: Include <mwaitintrin.h>.
* doc/extend.texi: Document mwait target attribute.
* doc/invoke.texi: Document -mmwait.
gcc/testsuite/
* gcc.target/i386/monitor-2.c: New test.
(cherry picked from commit d8c6cc2ca35489bc41bb58ec96c1195928826922)
---
gcc/common/config/i386/i386-common.c | 15 +++++++
gcc/config.gcc | 6 ++-
gcc/config/i386/i386-builtins.c | 4 +-
gcc/config/i386/i386-options.c | 7 +++
gcc/config/i386/i386.h | 2 +
gcc/config/i386/i386.opt | 4 ++
gcc/config/i386/mwaitintrin.h | 52 +++++++++++++++++++++++
gcc/config/i386/pmmintrin.h | 13 +-----
gcc/config/i386/sse.md | 4 +-
gcc/config/i386/x86gprintrin.h | 2 +
gcc/doc/extend.texi | 5 +++
gcc/doc/invoke.texi | 8 +++-
gcc/testsuite/gcc.target/i386/monitor-2.c | 27 ++++++++++++
13 files changed, 130 insertions(+), 19 deletions(-)
create mode 100644 gcc/config/i386/mwaitintrin.h
create mode 100644 gcc/testsuite/gcc.target/i386/monitor-2.c
diff --git a/gcc/common/config/i386/i386-common.c
b/gcc/common/config/i386/i386-common.c
index 6a7b5c8312f..e156cc34584 100644
--- a/gcc/common/config/i386/i386-common.c
+++ b/gcc/common/config/i386/i386-common.c
@@ -150,6 +150,7 @@ along with GCC; see the file COPYING3. If not see
#define OPTION_MASK_ISA_F16C_SET \
(OPTION_MASK_ISA_F16C | OPTION_MASK_ISA_AVX_SET)
#define OPTION_MASK_ISA2_MWAITX_SET OPTION_MASK_ISA2_MWAITX
+#define OPTION_MASK_ISA2_MWAIT_SET OPTION_MASK_ISA2_MWAIT
#define OPTION_MASK_ISA2_CLZERO_SET OPTION_MASK_ISA2_CLZERO
#define OPTION_MASK_ISA_PKU_SET OPTION_MASK_ISA_PKU
#define OPTION_MASK_ISA2_RDPID_SET OPTION_MASK_ISA2_RDPID
@@ -245,6 +246,7 @@ along with GCC; see the file COPYING3. If not see
#define OPTION_MASK_ISA_XSAVES_UNSET OPTION_MASK_ISA_XSAVES
#define OPTION_MASK_ISA_CLWB_UNSET OPTION_MASK_ISA_CLWB
#define OPTION_MASK_ISA2_MWAITX_UNSET OPTION_MASK_ISA2_MWAITX
+#define OPTION_MASK_ISA2_MWAIT_UNSET OPTION_MASK_ISA2_MWAIT
#define OPTION_MASK_ISA2_CLZERO_UNSET OPTION_MASK_ISA2_CLZERO
#define OPTION_MASK_ISA_PKU_UNSET OPTION_MASK_ISA_PKU
#define OPTION_MASK_ISA2_RDPID_UNSET OPTION_MASK_ISA2_RDPID
@@ -1546,6 +1548,19 @@ ix86_handle_option (struct gcc_options *opts,
}
return true;
+ case OPT_mmwait:
+ if (value)
+ {
+ opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_MWAIT_SET;
+ opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_MWAIT_SET;
+ }
+ else
+ {
+ opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_MWAIT_UNSET;
+ opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_MWAIT_UNSET;
+ }
+ return true;
+
case OPT_mclzero:
if (value)
{
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 357b0bed067..a020e0808c9 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -414,7 +414,8 @@ i[34567]86-*-*)
avx512vp2intersectintrin.h avx512vp2intersectvlintrin.h
tsxldtrkintrin.h amxtileintrin.h amxint8intrin.h
amxbf16intrin.h x86gprintrin.h uintrintrin.h
- hresetintrin.h keylockerintrin.h avxvnniintrin.h"
+ hresetintrin.h keylockerintrin.h avxvnniintrin.h
+ mwaitintrin.h"
;;
x86_64-*-*)
cpu_type=i386
@@ -451,7 +452,8 @@ x86_64-*-*)
avx512vp2intersectintrin.h avx512vp2intersectvlintrin.h
tsxldtrkintrin.h amxtileintrin.h amxint8intrin.h
amxbf16intrin.h x86gprintrin.h uintrintrin.h
- hresetintrin.h keylockerintrin.h avxvnniintrin.h"
+ hresetintrin.h keylockerintrin.h avxvnniintrin.h
+ mwaitintrin.h"
;;
ia64-*-*)
extra_headers=ia64intrin.h
diff --git a/gcc/config/i386/i386-builtins.c b/gcc/config/i386/i386-builtins.c
index 4fcdf4b89ee..128bd39816c 100644
--- a/gcc/config/i386/i386-builtins.c
+++ b/gcc/config/i386/i386-builtins.c
@@ -628,9 +628,9 @@ ix86_init_mmx_sse_builtins (void)
VOID_FTYPE_VOID, IX86_BUILTIN_MFENCE);
/* SSE3. */
- def_builtin (OPTION_MASK_ISA_SSE3, 0, "__builtin_ia32_monitor",
+ def_builtin (0, OPTION_MASK_ISA2_MWAIT, "__builtin_ia32_monitor",
VOID_FTYPE_PCVOID_UNSIGNED_UNSIGNED, IX86_BUILTIN_MONITOR);
- def_builtin (OPTION_MASK_ISA_SSE3, 0, "__builtin_ia32_mwait",
+ def_builtin (0, OPTION_MASK_ISA2_MWAIT, "__builtin_ia32_mwait",
VOID_FTYPE_UNSIGNED_UNSIGNED, IX86_BUILTIN_MWAIT);
/* AES */
diff --git a/gcc/config/i386/i386-options.c b/gcc/config/i386/i386-options.c
index 18d2c0b9f99..7ecd0cf8b8c 100644
--- a/gcc/config/i386/i386-options.c
+++ b/gcc/config/i386/i386-options.c
@@ -207,6 +207,7 @@ static struct ix86_target_opts isa2_opts[] =
{ "-mmovbe", OPTION_MASK_ISA2_MOVBE },
{ "-mclzero", OPTION_MASK_ISA2_CLZERO },
{ "-mmwaitx", OPTION_MASK_ISA2_MWAITX },
+ { "-mmwait", OPTION_MASK_ISA2_MWAIT },
{ "-mmovdir64b", OPTION_MASK_ISA2_MOVDIR64B },
{ "-mwaitpkg", OPTION_MASK_ISA2_WAITPKG },
{ "-mcldemote", OPTION_MASK_ISA2_CLDEMOTE },
@@ -1015,6 +1016,7 @@ ix86_valid_target_attribute_inner_p (tree fndecl, tree
args, char *p_strings[],
IX86_ATTR_ISA ("fsgsbase", OPT_mfsgsbase),
IX86_ATTR_ISA ("rdrnd", OPT_mrdrnd),
IX86_ATTR_ISA ("mwaitx", OPT_mmwaitx),
+ IX86_ATTR_ISA ("mwait", OPT_mmwait),
IX86_ATTR_ISA ("clzero", OPT_mclzero),
IX86_ATTR_ISA ("pku", OPT_mpku),
IX86_ATTR_ISA ("lwp", OPT_mlwp),
@@ -2612,6 +2614,11 @@ ix86_option_override_internal (bool main_args_p,
|| TARGET_PREFETCHWT1_P (opts->x_ix86_isa_flags))
ix86_prefetch_sse = true;
+ /* Enable mwait/monitor instructions for -msse3. */
+ if (TARGET_SSE3_P (opts->x_ix86_isa_flags))
+ opts->x_ix86_isa_flags2
+ |= OPTION_MASK_ISA2_MWAIT & ~opts->x_ix86_isa_flags2_explicit;
+
/* Enable popcnt instruction for -msse4.2 or -mabm. */
if (TARGET_SSE4_2_P (opts->x_ix86_isa_flags)
|| TARGET_ABM_P (opts->x_ix86_isa_flags))
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 5583ec6881a..73e118900f7 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -181,6 +181,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.
If not, see
#define TARGET_CLWB_P(x) TARGET_ISA_CLWB_P(x)
#define TARGET_MWAITX TARGET_ISA2_MWAITX
#define TARGET_MWAITX_P(x) TARGET_ISA2_MWAITX_P(x)
+#define TARGET_MWAIT TARGET_ISA2_MWAIT
+#define TARGET_MWAIT_P(x) TARGET_ISA2_MWAIT_P(x)
#define TARGET_PKU TARGET_ISA_PKU
#define TARGET_PKU_P(x) TARGET_ISA_PKU_P(x)
#define TARGET_SHSTK TARGET_ISA_SHSTK
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index c781fdc8278..7b8547bb1c3 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -1162,3 +1162,7 @@ AVXVNNI built-in functions and code generation.
mneeded
Target Var(ix86_needed) Save
Emit GNU_PROPERTY_X86_ISA_1_NEEDED GNU property.
+
+mmwait
+Target Mask(ISA2_MWAIT) Var(ix86_isa_flags2) Save
+Support MWAIT and MONITOR built-in functions and code generation.
diff --git a/gcc/config/i386/mwaitintrin.h b/gcc/config/i386/mwaitintrin.h
new file mode 100644
index 00000000000..1ecbc4abb69
--- /dev/null
+++ b/gcc/config/i386/mwaitintrin.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+
+ This file is part of GCC.
+
+ GCC is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ GCC is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ 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/>. */
+
+#ifndef _MWAITINTRIN_H_INCLUDED
+#define _MWAITINTRIN_H_INCLUDED
+
+#ifndef __MWAIT__
+#pragma GCC push_options
+#pragma GCC target("mwait")
+#define __DISABLE_MWAIT__
+#endif /* __MWAIT__ */
+
+extern __inline void
+__attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_monitor (void const * __P, unsigned int __E, unsigned int __H)
+{
+ __builtin_ia32_monitor (__P, __E, __H);
+}
+
+extern __inline void
+__attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_mwait (unsigned int __E, unsigned int __H)
+{
+ __builtin_ia32_mwait (__E, __H);
+}
+
+#ifdef __DISABLE_MWAIT__
+#undef __DISABLE_MWAIT__
+#pragma GCC pop_options
+#endif /* __DISABLE_MWAIT__ */
+
+#endif /* _MWAITINTRIN_H_INCLUDED */
diff --git a/gcc/config/i386/pmmintrin.h b/gcc/config/i386/pmmintrin.h
index fa9c5bb8b9f..f8102d2be23 100644
--- a/gcc/config/i386/pmmintrin.h
+++ b/gcc/config/i386/pmmintrin.h
@@ -29,6 +29,7 @@
/* We need definitions from the SSE2 and SSE header files*/
#include <emmintrin.h>
+#include <mwaitintrin.h>
#ifndef __SSE3__
#pragma GCC push_options
@@ -112,18 +113,6 @@ _mm_lddqu_si128 (__m128i const *__P)
return (__m128i) __builtin_ia32_lddqu ((char const *)__P);
}
-extern __inline void __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
-_mm_monitor (void const * __P, unsigned int __E, unsigned int __H)
-{
- __builtin_ia32_monitor (__P, __E, __H);
-}
-
-extern __inline void __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
-_mm_mwait (unsigned int __E, unsigned int __H)
-{
- __builtin_ia32_mwait (__E, __H);
-}
-
#ifdef __DISABLE_SSE3__
#undef __DISABLE_SSE3__
#pragma GCC pop_options
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 3f81abc7804..43afe3dabed 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -16593,7 +16593,7 @@ (define_insn "sse3_mwait"
[(unspec_volatile [(match_operand:SI 0 "register_operand" "c")
(match_operand:SI 1 "register_operand" "a")]
UNSPECV_MWAIT)]
- "TARGET_SSE3"
+ "TARGET_MWAIT"
;; 64bit version is "mwait %rax,%rcx". But only lower 32bits are used.
;; Since 32bit register operands are implicitly zero extended to 64bit,
;; we only need to set up 32bit registers.
@@ -16605,7 +16605,7 @@ (define_insn "@sse3_monitor_<mode>"
(match_operand:SI 1 "register_operand" "c")
(match_operand:SI 2 "register_operand" "d")]
UNSPECV_MONITOR)]
- "TARGET_SSE3"
+ "TARGET_MWAIT"
;; 64bit version is "monitor %rax,%rcx,%rdx". But only lower 32bits in
;; RCX and RDX are used. Since 32bit register operands are implicitly
;; zero extended to 64bit, we only need to set up 32bit registers.
diff --git a/gcc/config/i386/x86gprintrin.h b/gcc/config/i386/x86gprintrin.h
index ceda501252c..7793032ba90 100644
--- a/gcc/config/i386/x86gprintrin.h
+++ b/gcc/config/i386/x86gprintrin.h
@@ -56,6 +56,8 @@
#include <movdirintrin.h>
+#include <mwaitintrin.h>
+
#include <mwaitxintrin.h>
#include <pconfigintrin.h>
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 1bc66cce2b8..1acfaf1d345 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -6665,6 +6665,11 @@ Enable/disable the generation of the MOVDIR64B
instructions.
@cindex @code{target("movdiri")} function attribute, x86
Enable/disable the generation of the MOVDIRI instructions.
+@item mwait
+@itemx no-mwait
+@cindex @code{target("mwait")} function attribute, x86
+Enable/disable the generation of the MWAIT and MONITOR instructions.
+
@item mwaitx
@itemx no-mwaitx
@cindex @code{target("mwaitx")} function attribute, x86
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 7f13ffb79e1..3e1f0bc8fad 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1371,7 +1371,7 @@ See RS/6000 and PowerPC Options.
-mno-wide-multiply -mrtd -malign-double @gol
-mpreferred-stack-boundary=@var{num} @gol
-mincoming-stack-boundary=@var{num} @gol
--mcld -mcx16 -msahf -mmovbe -mcrc32 @gol
+-mcld -mcx16 -msahf -mmovbe -mcrc32 -mmwait @gol
-mrecip -mrecip=@var{opt} @gol
-mvzeroupper -mprefer-avx128 -mprefer-vector-width=@var{opt} @gol
-mmmx -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mavx @gol
@@ -31159,6 +31159,12 @@ This option enables built-in functions
@code{__builtin_ia32_crc32qi},
@code{__builtin_ia32_crc32hi}, @code{__builtin_ia32_crc32si} and
@code{__builtin_ia32_crc32di} to generate the @code{crc32} machine instruction.
+@item -mmwait
+@opindex mmwait
+This option enables built-in functions @code{__builtin_ia32_monitor},
+and @code{__builtin_ia32_mwait} to generate the @code{monitor} and
+@code{mwait} machine instructions.
+
@item -mrecip
@opindex mrecip
This option enables use of @code{RCPSS} and @code{RSQRTSS} instructions
diff --git a/gcc/testsuite/gcc.target/i386/monitor-2.c
b/gcc/testsuite/gcc.target/i386/monitor-2.c
new file mode 100644
index 00000000000..96eeec070f0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/monitor-2.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mmwait -mgeneral-regs-only" } */
+
+/* Verify that they work in both 32bit and 64bit. */
+
+#include <x86gprintrin.h>
+
+void
+foo (char *p, int x, int y, int z)
+{
+ _mm_monitor (p, y, x);
+ _mm_mwait (z, y);
+}
+
+void
+bar (char *p, long x, long y, long z)
+{
+ _mm_monitor (p, y, x);
+ _mm_mwait (z, y);
+}
+
+void
+foo1 (char *p)
+{
+ _mm_monitor (p, 0, 0);
+ _mm_mwait (0, 0);
+}
--
2.31.1
