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Bug 585708 - Part 1: Rework SSE.h so that it supports and encourages putting intrinsics in a file separate from the main code. r,a2.0=dbaron
--HG-- extra : rebase_source : 6bc2169ba4e451e1d8a36540614024fe40902e62
This commit is contained in:
Justin Lebar
parent
ede16504ba
commit
32d92cb466
365
xpcom/glue/SSE.h
365
xpcom/glue/SSE.h
@ -20,6 +20,7 @@
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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* Justin Lebar <justin.lebar@gmail.com>, Mozilla Corporation
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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@ -47,11 +48,12 @@
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* The public interface of this header consists of a set of macros and
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* functions for Intel CPU features.
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*
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* CODE USING ASSEMBLY
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* ===================
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* DETECTING ISA EXTENSIONS
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* ========================
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*
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* This header provides the following functions for determining whether the
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* current CPU supports a particular instruction set extension:
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*
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* For each feature handled here, this header defines a single function
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* that can be used to test whether to use code written in *assembly*:
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* mozilla::supports_mmx
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* mozilla::supports_sse
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* mozilla::supports_sse2
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@ -60,145 +62,66 @@
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* mozilla::supports_sse4a
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* mozilla::supports_sse4_1
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* mozilla::supports_sse4_2
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* Note that the dynamic detection depends on cpuid intrinsics only
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* available in gcc 4.3 or later and MSVC 8.0 (Visual C++ 2005) or
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* later, so the dynamic detection returns false in older compilers.
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* (This could be fixed by replacing the code with inline assembly.)
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*
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* CODE USING INTRINSICS
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* =====================
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* If you're writing code using inline assembly, you should guard it with a
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* call to one of these functions. For instance:
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*
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* The remainder of the functions and macros that are the API from this
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* header relate to code written using CPU intrinsics.
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* if (mozilla::supports_sse2()) {
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* asm(" ... ");
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* }
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* else {
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* ...
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* }
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*
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* In each macro-function pair, the function may not be available if the
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* macro is undefined. They should be used in the following pattern:
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* Note that these functions depend on cpuid intrinsics only available in gcc
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* 4.3 or later and MSVC 8.0 (Visual C++ 2005) or later, so they return false
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* in older compilers. (This could be fixed by replacing the code with inline
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* assembly.)
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*
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* if (mozilla::use_abc()) {
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* #ifdef MOZILLA_COMPILE_WITH_ABC
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* // abc-specific code here
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* #endif
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* } else {
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* // generic code here
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* }
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*
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* In addition, on some platforms, the headers that contain the
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* intrinsics for many of these features won't compile unless we define
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* a particular macro first (to pretend that we gave gcc an appropriate
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* -march option). Therefore, code using this header should NOT include
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* the headers for intrinsics directly, but should instead request the
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* header by defining the header macro given below *before* including
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* this file (which, in practice, means before including *any* header
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* files).
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* USING INTRINSICS
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* ================
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*
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* The dynamic detection depends on cpuid intrinsics only available in
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* gcc 4.3 or later and MSVC 8.0 (Visual C++ 2005) or later, so the
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* dynamic detection returns false in older compilers. However, it
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* could be extended to avoid this restriction; see the code in
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* mozilla/jpeg/jdapimin.c for some hints.
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* This header also provides support for coding using CPU intrinsics.
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*
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* Macro: MOZILLA_COMPILE_WITH_MMX
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* Function: mozilla::use_mmx
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_MMX
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* Header: <mmintrin.h>
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* For each mozilla::supports_abc function, we define a MOZILLA_MAY_SUPPORT_ABC
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* macro which indicates that the target/compiler combination we're using is
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* compatible with the ABC extension. For instance, x86_64 with MSVC 2003 is
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* compatible with SSE2 but not SSE3, since although there exist x86_64 CPUs
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* with SSE3 support, MSVC 2003 only supports through SSE2.
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*
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* Macro: MOZILLA_COMPILE_WITH_SSE
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* Function: mozilla::use_sse
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE
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* Header: <xmmintrin.h>
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* Until gcc fixes #pragma target [1] [2] or our x86 builds require SSE2,
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* you'll need to separate code using intrinsics into a file separate from your
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* regular code. Here's the recommended pattern:
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*
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* Macro: MOZILLA_COMPILE_WITH_SSE2
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* Function: mozilla::use_sse2
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE2
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* Header: <emmintrin.h>
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* #ifdef MOZILLA_MAY_SUPPORT_ABC
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* namespace mozilla {
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* namespace ABC {
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* void foo();
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* }
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* }
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* #endif
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*
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* Macro: MOZILLA_COMPILE_WITH_SSE3
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* Function: mozilla::use_sse3
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE3
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* Header: <pmmintrin.h>
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* void foo() {
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* #ifdef MOZILLA_MAY_SUPPORT_ABC
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* if (mozilla::supports_abc()) {
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* mozilla::ABC::foo(); // in a separate file
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* return;
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* }
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* #endif
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*
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* Macro: MOZILLA_COMPILE_WITH_SSSE3
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* Function: mozilla::use_ssse3
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSSE3
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* Header: <tmmintrin.h>
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* foo_unvectorized();
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* }
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*
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* Macro: MOZILLA_COMPILE_WITH_SSE4A
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* Function: mozilla::use_sse4a
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE4A
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* Header: <ammintrin.h>
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* You'll need to define mozilla::ABC::foo() in a separate file and add the
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* -mabc flag when using gcc.
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*
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* Macro: MOZILLA_COMPILE_WITH_SSE4_1
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* Function: mozilla::use_sse4_1
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE4_1
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* Header: <smmintrin.h>
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* [1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39787 and
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* [2] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41201 being fixed.
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*
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* Macro: MOZILLA_COMPILE_WITH_SSE4_2
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* Function: mozilla::use_sse4_2
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* Header Macro: MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE4_2
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* Header: <nmmintrin.h>
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*/
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
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// GCC
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// FIXME: Is any of this available on arm? GCC seems to offer mmintrin.h
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#if 0
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// #pragma target doesn't actually work yet; making it work depends on
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// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39787 and
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// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41201 being fixed.
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// Note that this means there are cases where mozilla::use_abc() will
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// return true even though we can't define MOZILLA_COMPILE_WITH_ABC.
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#define MOZILLA_SSE_HAVE_PRAGMA_TARGET
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#endif
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#ifdef MOZILLA_SSE_HAVE_PRAGMA_TARGET
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// Limit compilation to compiler versions where the *intrin.h headers
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// are present. (These ifdefs actually aren't useful because they're
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// all (currently) weaker than MOZILLA_SSE_HAVE_PRAGMA_TARGET.)
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1) // GCC 3.1 and up
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#define MOZILLA_COMPILE_WITH_MMX 1
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#define MOZILLA_COMPILE_WITH_SSE 1
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#endif // GCC 3.1 and up
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) // GCC 3.3 and up
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#define MOZILLA_COMPILE_WITH_SSE2 1
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#define MOZILLA_COMPILE_WITH_SSE3 1
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#endif // GCC 3.3 and up
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) // GCC 4.3 and up
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#define MOZILLA_COMPILE_WITH_SSSE3 1
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#define MOZILLA_COMPILE_WITH_SSE4A 1
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#define MOZILLA_COMPILE_WITH_SSE4_1 1
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#define MOZILLA_COMPILE_WITH_SSE4_2 1
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#endif // GCC 4.3 and up
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// GCC 4.3 and GCC 4.4 shipped with SSE5, but it is being removed in GCC
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// 4.5; see http://gcc.gnu.org/ml/gcc-patches/2009-07/msg01527.html and
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// http://gcc.gnu.org/ml/gcc-patches/2009-07/msg01536.html
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#else
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#ifdef __MMX__
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#define MOZILLA_COMPILE_WITH_MMX 1
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#endif
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#ifdef __SSE__
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#define MOZILLA_COMPILE_WITH_SSE 1
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#endif
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#ifdef __SSE2__
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#define MOZILLA_COMPILE_WITH_SSE2 1
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#endif
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#ifdef __SSE3__
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#define MOZILLA_COMPILE_WITH_SSE3 1
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#endif
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#ifdef __SSSE3__
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#define MOZILLA_COMPILE_WITH_SSSE3 1
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#endif
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#ifdef __SSE4A__
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#define MOZILLA_COMPILE_WITH_SSE4A 1
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#endif
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#ifdef __SSE4_1__
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#define MOZILLA_COMPILE_WITH_SSE4_1 1
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#endif
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#ifdef __SSE4_2__
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#define MOZILLA_COMPILE_WITH_SSE4_2 1
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#endif
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#endif
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#ifdef __MMX__
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// It's ok to use MMX instructions based on the -march option (or
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@ -263,99 +186,9 @@ namespace mozilla {
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#endif
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// We need to #include headers quite carefully for CPUID-tested
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// compilation. GCC's headers for SSE intrinsics both:
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// * have #error in them when the appropriate macro is not defined, and
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// * depend on intrinsics that depend on -msse, etc.
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// We could fix the first of these options with #define. However, we
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// can fix the second only with #pragma directives introduced in GCC
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// 4.4 (but not yet working quite well enough on any gcc version), whose
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// availability influenced (above) whether MOZILLA_COMPILE_WITH_* is
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// defined.
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#ifdef MOZILLA_SSE_HAVE_PRAGMA_TARGET
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#pragma GCC push_options
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#endif
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#if defined(MOZILLA_COMPILE_WITH_MMX) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_MMX)
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#if !defined(__MMX__)
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#pragma GCC target ("mmx")
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#endif
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#include <mmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE)
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#if !defined(__SSE__)
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#pragma GCC target ("sse")
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#endif
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#include <xmmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE2) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE2)
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#if !defined(__SSE2__)
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#pragma GCC target ("sse2")
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#endif
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#include <emmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE3) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE3)
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#if !defined(__SSE3__)
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#pragma GCC target ("sse3")
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#endif
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#include <pmmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSSE3) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSSE3)
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#if !defined(__SSSE3__)
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#pragma GCC target ("ssse3")
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#endif
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#include <tmmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE4A) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE4A)
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#if !defined(__SSE4A__)
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#pragma GCC target ("sse4a")
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#endif
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#include <ammintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE4_1) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE4_1)
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#if !defined(__SSE4_1__)
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#pragma GCC target ("sse4.1")
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#endif
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#include <smmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE4_2) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE4_2)
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#if !defined(__SSE4_2__)
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#pragma GCC target ("sse4.2")
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#endif
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#include <nmmintrin.h>
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#endif
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#ifdef MOZILLA_SSE_HAVE_PRAGMA_TARGET
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#pragma GCC pop_options
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#endif
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#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_AMD64))
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// MSVC on x86 or amd64
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// Limit compilation to compiler versions where the *intrin.h headers
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// are present
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#if 1 // Available at least back to Visual Studio 2003
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#define MOZILLA_COMPILE_WITH_MMX 1
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#define MOZILLA_COMPILE_WITH_SSE 1
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#define MOZILLA_COMPILE_WITH_SSE2 1
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#endif // Available at least back to Visual Studio 2003
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#if _MSC_VER >= 1400
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#include <intrin.h>
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#define MOZILLA_SSE_HAVE_CPUID_DETECTION
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@ -394,28 +227,9 @@ namespace mozilla {
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#define MOZILLA_PRESUME_SSE2
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#endif
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#if defined(MOZILLA_COMPILE_WITH_MMX) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_MMX)
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#include <mmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE)
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#include <xmmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE2) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE2)
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#include <emmintrin.h>
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#endif
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#elif defined(__SUNPRO_CC) && (defined(__i386) || defined(__x86_64__))
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// Sun Studio on x86 or amd64
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#define MOZILLA_COMPILE_WITH_MMX 1
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#define MOZILLA_COMPILE_WITH_SSE 1
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#define MOZILLA_COMPILE_WITH_SSE2 1
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#define MOZILLA_SSE_HAVE_CPUID_DETECTION
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namespace mozilla {
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@ -488,21 +302,6 @@ namespace mozilla {
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#define MOZILLA_PRESUME_SSE2
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#endif
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#if defined(MOZILLA_COMPILE_WITH_MMX) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_MMX)
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#include <mmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE)
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#include <xmmintrin.h>
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#endif
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#if defined(MOZILLA_COMPILE_WITH_SSE2) && \
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defined(MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE2)
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#include <emmintrin.h>
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#endif
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#endif
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namespace mozilla {
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@ -537,119 +336,85 @@ namespace mozilla {
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}
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#if defined(MOZILLA_PRESUME_MMX)
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#define MOZILLA_MAY_SUPPORT_MMX 1
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inline bool supports_mmx() { return true; }
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#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
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#define MOZILLA_MAY_SUPPORT_MMX 1
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inline bool supports_mmx() { return sse_private::mmx_enabled; }
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#else
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inline bool supports_mmx() { return false; }
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#endif
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#if defined(MOZILLA_PRESUME_SSE)
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#define MOZILLA_MAY_SUPPORT_SSE 1
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inline bool supports_sse() { return true; }
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#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
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#define MOZILLA_MAY_SUPPORT_SSE 1
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inline bool supports_sse() { return sse_private::sse_enabled; }
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#else
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inline bool supports_sse() { return false; }
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#endif
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#if defined(MOZILLA_PRESUME_SSE2)
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#define MOZILLA_MAY_SUPPORT_SSE2 1
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inline bool supports_sse2() { return true; }
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#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
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#define MOZILLA_MAY_SUPPORT_SSE2 1
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inline bool supports_sse2() { return sse_private::sse2_enabled; }
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#else
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inline bool supports_sse2() { return false; }
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#endif
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#if defined(MOZILLA_PRESUME_SSE3)
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#define MOZILLA_MAY_SUPPORT_SSE3 1
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inline bool supports_sse3() { return true; }
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#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
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#define MOZILLA_MAY_SUPPORT_SSE3 1
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inline bool supports_sse3() { return sse_private::sse3_enabled; }
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#else
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inline bool supports_sse3() { return false; }
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#endif
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#if defined(MOZILLA_PRESUME_SSSE3)
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#define MOZILLA_MAY_SUPPORT_SSSE3 1
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inline bool supports_ssse3() { return true; }
|
||||
#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
|
||||
#define MOZILLA_MAY_SUPPORT_SSSE3 1
|
||||
inline bool supports_ssse3() { return sse_private::ssse3_enabled; }
|
||||
#else
|
||||
inline bool supports_ssse3() { return false; }
|
||||
#endif
|
||||
|
||||
#if defined(MOZILLA_PRESUME_SSE4A)
|
||||
#define MOZILLA_MAY_SUPPORT_SSE4A 1
|
||||
inline bool supports_sse4a() { return true; }
|
||||
#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
|
||||
#define MOZILLA_MAY_SUPPORT_SSE4A 1
|
||||
inline bool supports_sse4a() { return sse_private::sse4a_enabled; }
|
||||
#else
|
||||
inline bool supports_sse4a() { return false; }
|
||||
#endif
|
||||
|
||||
#if defined(MOZILLA_PRESUME_SSE4_1)
|
||||
#define MOZILLA_MAY_SUPPORT_SSE4_1 1
|
||||
inline bool supports_sse4_1() { return true; }
|
||||
#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
|
||||
#define MOZILLA_MAY_SUPPORT_SSE4_1 1
|
||||
inline bool supports_sse4_1() { return sse_private::sse4_1_enabled; }
|
||||
#else
|
||||
inline bool supports_sse4_1() { return false; }
|
||||
#endif
|
||||
|
||||
#if defined(MOZILLA_PRESUME_SSE4_2)
|
||||
#define MOZILLA_MAY_SUPPORT_SSE4_2 1
|
||||
inline bool supports_sse4_2() { return true; }
|
||||
#elif defined(MOZILLA_SSE_HAVE_CPUID_DETECTION)
|
||||
#define MOZILLA_MAY_SUPPORT_SSE4_2 1
|
||||
inline bool supports_sse4_2() { return sse_private::sse4_2_enabled; }
|
||||
#else
|
||||
inline bool supports_sse4_2() { return false; }
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_MMX
|
||||
inline bool use_mmx() { return supports_mmx(); }
|
||||
#else
|
||||
inline bool use_mmx() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSE
|
||||
inline bool use_sse() { return supports_sse(); }
|
||||
#else
|
||||
inline bool use_sse() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSE2
|
||||
inline bool use_sse2() { return supports_sse2(); }
|
||||
#else
|
||||
inline bool use_sse2() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSE3
|
||||
inline bool use_sse3() { return supports_sse3(); }
|
||||
#else
|
||||
inline bool use_sse3() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSSE3
|
||||
inline bool use_ssse3() { return supports_ssse3(); }
|
||||
#else
|
||||
inline bool use_ssse3() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSE4a
|
||||
inline bool use_sse4a() { return supports_sse4a(); }
|
||||
#else
|
||||
inline bool use_sse4a() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSE4_1
|
||||
inline bool use_sse4_1() { return supports_sse4_1(); }
|
||||
#else
|
||||
inline bool use_sse4_1() { return false; }
|
||||
#endif
|
||||
|
||||
#ifdef MOZILLA_COMPILE_WITH_SSE4_2
|
||||
inline bool use_sse4_2() { return supports_sse4_2(); }
|
||||
#else
|
||||
inline bool use_sse4_2() { return false; }
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
#endif /* !defined(mozilla_SSE_h_) */
|
||||
|
||||
@ -138,12 +138,11 @@ int main()
|
||||
|
||||
printf("Feature Presume Compile Support Use\n");
|
||||
#define SHOW_INFO(featurelc_, featureuc_) \
|
||||
printf( "%7s %1s %1s %1s %1s\n", \
|
||||
printf( "%7s %1s %1s %1s\n", \
|
||||
#featurelc_, \
|
||||
PRESUME_##featureuc_##_STRING, \
|
||||
COMPILE_##featureuc_##_STRING, \
|
||||
(mozilla::supports_##featurelc_() ? "Y" : "-"), \
|
||||
(mozilla::use_##featurelc_() ? "Y" : "-"));
|
||||
(mozilla::supports_##featurelc_() ? "Y" : "-"));
|
||||
SHOW_INFO(mmx, MMX)
|
||||
SHOW_INFO(sse, SSE)
|
||||
SHOW_INFO(sse2, SSE2)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user