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[OpenMP] RISCV64 port

Browse Source 
This is a port of libomp for the RISC-V 64-bit Linux target.

We have tested this port on a HiFive Unleashed development board
using a downstream LLVM that has support for the missing bits in
upstream. As of now, all tests are passing, including OMPT.

Patch by Ferran Pallarès!

Differential Revision: https://reviews.llvm.org/D59880

llvm-svn: 367021
This commit is contained in:
Jonas Hahnfeld 2019-07-25 14:36:20 +00:00
parent d668260f1a
commit 2488ae9df1
19 changed files with 243 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
openmp/README.rst
View File

@ -133,7 +133,7 @@ Options for all Libraries
Options for ``libomp``
----------------------
**LIBOMP_ARCH** = ``aarch64|arm|i386|mic|mips|mips64|ppc64|ppc64le|x86_64``
**LIBOMP_ARCH** = ``aarch64|arm|i386|mic|mips|mips64|ppc64|ppc64le|x86_64|riscv64``
The default value for this option is chosen based on probing the compiler for
architecture macros (e.g., is ``__x86_64__`` predefined by compiler?).
@ -189,8 +189,8 @@ Optional Features
**LIBOMP_OMPT_SUPPORT** = ``ON|OFF``
Include support for the OpenMP Tools Interface (OMPT).
This option is supported and ``ON`` by default for x86, x86_64, AArch64, and
PPC64 on Linux* and macOS*.
This option is supported and ``ON`` by default for x86, x86_64, AArch64,
PPC64 and RISCV64 on Linux* and macOS*.
This option is ``OFF`` if this feature is not supported for the platform.
**LIBOMP_OMPT_OPTIONAL** = ``ON|OFF``

9
openmp/runtime/CMakeLists.txt
View File

@ -30,7 +30,7 @@ if(${OPENMP_STANDALONE_BUILD})
# If adding a new architecture, take a look at cmake/LibompGetArchitecture.cmake
libomp_get_architecture(LIBOMP_DETECTED_ARCH)
set(LIBOMP_ARCH ${LIBOMP_DETECTED_ARCH} CACHE STRING
"The architecture to build for (x86_64/i386/arm/ppc64/ppc64le/aarch64/mic/mips/mips64).")
"The architecture to build for (x86_64/i386/arm/ppc64/ppc64le/aarch64/mic/mips/mips64/riscv64).")
# Should assertions be enabled? They are on by default.
set(LIBOMP_ENABLE_ASSERTIONS TRUE CACHE BOOL
"enable assertions?")
@ -58,13 +58,15 @@ else() # Part of LLVM build
set(LIBOMP_ARCH aarch64)
elseif(LIBOMP_NATIVE_ARCH MATCHES "arm")
set(LIBOMP_ARCH arm)
elseif(LIBOMP_NATIVE_ARCH MATCHES "riscv64")
set(LIBOMP_ARCH riscv64)
else()
# last ditch effort
libomp_get_architecture(LIBOMP_ARCH)
endif ()
set(LIBOMP_ENABLE_ASSERTIONS ${LLVM_ENABLE_ASSERTIONS})
endif()
libomp_check_variable(LIBOMP_ARCH 32e x86_64 32 i386 arm ppc64 ppc64le aarch64 mic mips mips64)
libomp_check_variable(LIBOMP_ARCH 32e x86_64 32 i386 arm ppc64 ppc64le aarch64 mic mips mips64 riscv64)
set(LIBOMP_LIB_TYPE normal CACHE STRING
"Performance,Profiling,Stubs library (normal/profile/stubs)")
@ -142,6 +144,7 @@ set(PPC64 FALSE)
set(MIC FALSE)
set(MIPS64 FALSE)
set(MIPS FALSE)
set(RISCV64 FALSE)
if("${LIBOMP_ARCH}" STREQUAL "i386" OR "${LIBOMP_ARCH}" STREQUAL "32") # IA-32 architecture
set(IA32 TRUE)
elseif("${LIBOMP_ARCH}" STREQUAL "x86_64" OR "${LIBOMP_ARCH}" STREQUAL "32e") # Intel(R) 64 architecture
@ -162,6 +165,8 @@ elseif("${LIBOMP_ARCH}" STREQUAL "mips") # MIPS architecture
set(MIPS TRUE)
elseif("${LIBOMP_ARCH}" STREQUAL "mips64") # MIPS64 architecture
set(MIPS64 TRUE)
elseif("${LIBOMP_ARCH}" STREQUAL "riscv64") # RISCV64 architecture
set(RISCV64 TRUE)
endif()
# Set some flags based on build_type

1
openmp/runtime/README.txt
View File

@ -53,6 +53,7 @@ Architectures Supported
* IBM(R) Power architecture (big endian)
* IBM(R) Power architecture (little endian)
* MIPS and MIPS64 architecture
* RISCV64 architecture
Supported RTL Build Configurations
==================================

2
openmp/runtime/cmake/LibompGetArchitecture.cmake
View File

@ -45,6 +45,8 @@ function(libomp_get_architecture return_arch)
#error ARCHITECTURE=mips64
#elif defined(__mips__) && !defined(__mips64)
#error ARCHITECTURE=mips
#elif defined(__riscv) && __riscv_xlen == 64
#error ARCHITECTURE=riscv64
#else
#error ARCHITECTURE=UnknownArchitecture
#endif

3
openmp/runtime/cmake/LibompMicroTests.cmake
View File

@ -211,6 +211,9 @@ else()
elseif(${MIPS} OR ${MIPS64})
libomp_append(libomp_expected_library_deps libc.so.6)
libomp_append(libomp_expected_library_deps ld.so.1)
elseif(${RISCV64})
libomp_append(libomp_expected_library_deps libc.so.6)
libomp_append(libomp_expected_library_deps ld.so.1)
endif()
libomp_append(libomp_expected_library_deps libpthread.so.0 IF_FALSE STUBS_LIBRARY)
libomp_append(libomp_expected_library_deps libhwloc.so.5 LIBOMP_USE_HWLOC)

2
openmp/runtime/cmake/LibompUtils.cmake
View File

@ -105,6 +105,8 @@ function(libomp_get_legal_arch return_arch_string)
set(${return_arch_string} "MIPS" PARENT_SCOPE)
elseif(${MIPS64})
set(${return_arch_string} "MIPS64" PARENT_SCOPE)
elseif(${RISCV64})
set(${return_arch_string} "RISCV64" PARENT_SCOPE)
else()
set(${return_arch_string} "${LIBOMP_ARCH}" PARENT_SCOPE)
libomp_warning_say("libomp_get_legal_arch(): Warning: Unknown architecture: Using ${LIBOMP_ARCH}")

3
openmp/runtime/cmake/config-ix.cmake
View File

@ -246,7 +246,8 @@ else()
# (LIBOMP_ARCH STREQUAL arm) OR
(LIBOMP_ARCH STREQUAL aarch64) OR
(LIBOMP_ARCH STREQUAL ppc64le) OR
(LIBOMP_ARCH STREQUAL ppc64))
(LIBOMP_ARCH STREQUAL ppc64) OR
(LIBOMP_ARCH STREQUAL riscv64))
AND # OS supported?
((WIN32 AND LIBOMP_HAVE_PSAPI) OR APPLE OR (NOT WIN32 AND LIBOMP_HAVE_WEAK_ATTRIBUTE)))
set(LIBOMP_HAVE_OMPT_SUPPORT TRUE)

3
openmp/runtime/src/kmp_csupport.cpp
View File

@ -676,7 +676,8 @@ void __kmpc_flush(ident_t *loc) {
#endif // KMP_COMPILER_ICC
}
#endif // KMP_MIC
#elif (KMP_ARCH_ARM || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS || KMP_ARCH_MIPS64)
#elif (KMP_ARCH_ARM || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS || KMP_ARCH_MIPS64 || \
KMP_ARCH_RISCV64)
// Nothing to see here move along
#elif KMP_ARCH_PPC64
// Nothing needed here (we have a real MB above).

5
openmp/runtime/src/kmp_os.h
View File

@ -165,7 +165,8 @@ typedef unsigned long long kmp_uint64;
#if KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_MIPS
#define KMP_SIZE_T_SPEC KMP_UINT32_SPEC
#elif KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64
#elif KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || \
KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64
#define KMP_SIZE_T_SPEC KMP_UINT64_SPEC
#else
#error "Can't determine size_t printf format specifier."
@ -840,7 +841,7 @@ extern kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v);
#endif /* KMP_OS_WINDOWS */
#if KMP_ARCH_PPC64 || KMP_ARCH_ARM || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS || \
KMP_ARCH_MIPS64
KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64
#define KMP_MB() __sync_synchronize()
#endif

6
openmp/runtime/src/kmp_platform.h
View File

@ -98,6 +98,7 @@
#define KMP_ARCH_PPC64 (KMP_ARCH_PPC64_LE || KMP_ARCH_PPC64_BE)
#define KMP_ARCH_MIPS 0
#define KMP_ARCH_MIPS64 0
#define KMP_ARCH_RISCV64 0
#if KMP_OS_WINDOWS
#if defined(_M_AMD64) || defined(__x86_64)
@ -135,6 +136,9 @@
#undef KMP_ARCH_MIPS
#define KMP_ARCH_MIPS 1
#endif
#elif defined __riscv && __riscv_xlen == 64
#undef KMP_ARCH_RISCV64
#define KMP_ARCH_RISCV64 1
#endif
#endif
@ -199,7 +203,7 @@
// TODO: Fixme - This is clever, but really fugly
#if (1 != \
KMP_ARCH_X86 + KMP_ARCH_X86_64 + KMP_ARCH_ARM + KMP_ARCH_PPC64 + \
KMP_ARCH_AARCH64 + KMP_ARCH_MIPS + KMP_ARCH_MIPS64)
KMP_ARCH_AARCH64 + KMP_ARCH_MIPS + KMP_ARCH_MIPS64 + KMP_ARCH_RISCV64)
#error Unknown or unsupported architecture
#endif

3
openmp/runtime/src/kmp_runtime.cpp
View File

@ -8023,7 +8023,8 @@ __kmp_determine_reduction_method(
int atomic_available = FAST_REDUCTION_ATOMIC_METHOD_GENERATED;
#if KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64
#if KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || \
KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64
#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \
KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD

10
openmp/runtime/src/thirdparty/ittnotify/ittnotify_config.h vendored
View File

@ -161,6 +161,10 @@
# define ITT_ARCH_MIPS64 6
#endif /* ITT_ARCH_MIPS64 */
#ifndef ITT_ARCH_RISCV64
# define ITT_ARCH_RISCV64 7
#endif /* ITT_ARCH_RISCV64 */
#ifndef ITT_ARCH
# if defined _M_IX86 || defined __i386__
# define ITT_ARCH ITT_ARCH_IA32
@ -178,6 +182,8 @@
# define ITT_ARCH ITT_ARCH_MIPS
# elif defined __mips__ && defined __mips64
# define ITT_ARCH ITT_ARCH_MIPS64
# elif defined __riscv && __riscv_xlen == 64
# define ITT_ARCH ITT_ARCH_RISCV64
# endif
#endif
@ -330,7 +336,9 @@ ITT_INLINE long __TBB_machine_fetchadd4(volatile void* ptr, long addend)
: "memory");
return result;
}
#elif ITT_ARCH==ITT_ARCH_ARM || ITT_ARCH==ITT_ARCH_PPC64 || ITT_ARCH==ITT_ARCH_AARCH64 || ITT_ARCH==ITT_ARCH_MIPS || ITT_ARCH==ITT_ARCH_MIPS64
#elif ITT_ARCH == ITT_ARCH_ARM || ITT_ARCH == ITT_ARCH_PPC64 || \
ITT_ARCH == ITT_ARCH_AARCH64 || ITT_ARCH == ITT_ARCH_MIPS || \
ITT_ARCH == ITT_ARCH_MIPS64 || ITT_ARCH == ITT_ARCH_RISCV64
#define __TBB_machine_fetchadd4(addr, val) __sync_fetch_and_add(addr, val)
#endif /* ITT_ARCH==ITT_ARCH_IA64 */
#ifndef ITT_SIMPLE_INIT

172
openmp/runtime/src/z_Linux_asm.S
View File

@ -1563,6 +1563,173 @@ __kmp_invoke_microtask:
#endif /* KMP_ARCH_PPC64 */
#if KMP_ARCH_RISCV64
//------------------------------------------------------------------------
//
// typedef void (*microtask_t)(int *gtid, int *tid, ...);
//
// int __kmp_invoke_microtask(microtask_t pkfn, int gtid, int tid, int argc,
// void *p_argv[]
// #if OMPT_SUPPORT
// ,
// void **exit_frame_ptr
// #endif
// ) {
// #if OMPT_SUPPORT
// *exit_frame_ptr = OMPT_GET_FRAME_ADDRESS(0);
// #endif
//
// (*pkfn)(&gtid, &tid, argv[0], ...);
//
// return 1;
// }
//
// Parameters:
// a0: pkfn
// a1: gtid
// a2: tid
// a3: argc
// a4: p_argv
// a5: exit_frame_ptr
//
// Locals:
// __gtid: gtid param pushed on stack so can pass &gtid to pkfn
// __tid: tid param pushed on stack so can pass &tid to pkfn
//
// Temp. registers:
//
// t0: used to calculate the dynamic stack size / used to hold pkfn address
// t1: used as temporary for stack placement calculation
// t2: used as temporary for stack arguments
// t3: used as temporary for number of remaining pkfn parms
// t4: used to traverse p_argv array
//
// return: a0 (always 1/TRUE)
//
__gtid = -20
__tid = -24
// -- Begin __kmp_invoke_microtask
// mark_begin;
.text
.globl __kmp_invoke_microtask
.p2align 1
.type __kmp_invoke_microtask,@function
__kmp_invoke_microtask:
.cfi_startproc
// First, save ra and fp
addi sp, sp, -16
sd ra, 8(sp)
sd fp, 0(sp)
addi fp, sp, 16
.cfi_def_cfa fp, 0
.cfi_offset ra, -8
.cfi_offset fp, -16
// Compute the dynamic stack size:
//
// - We need 8 bytes for storing 'gtid' and 'tid', so we can pass them by
// reference
// - We need 8 bytes for each argument that cannot be passed to the 'pkfn'
// function by register. Given that we have 8 of such registers (a[0-7])
// and two + 'argc' arguments (consider &gtid and &tid), we need to
// reserve max(0, argc - 6)*8 extra bytes
//
// The total number of bytes is then max(0, argc - 6)*8 + 8
// Compute max(0, argc - 6) using the following bithack:
// max(0, x) = x - (x & (x >> 31)), where x := argc - 6
// Source: http://graphics.stanford.edu/~seander/bithacks.html#IntegerMinOrMax
addi t0, a3, -6
srai t1, t0, 31
and t1, t0, t1
sub t0, t0, t1
addi t0, t0, 1
slli t0, t0, 3
sub sp, sp, t0
// Align the stack to 16 bytes
andi sp, sp, -16
mv t0, a0
mv t3, a3
mv t4, a4
#if OMPT_SUPPORT
// Save frame pointer into exit_frame
sd fp, 0(a5)
#endif
// Prepare arguments for the pkfn function (first 8 using a0-a7 registers)
sw a1, __gtid(fp)
sw a2, __tid(fp)
addi a0, fp, __gtid
addi a1, fp, __tid
beqz t3, .L_kmp_3
ld a2, 0(t4)
addi t3, t3, -1
beqz t3, .L_kmp_3
ld a3, 8(t4)
addi t3, t3, -1
beqz t3, .L_kmp_3
ld a4, 16(t4)
addi t3, t3, -1
beqz t3, .L_kmp_3
ld a5, 24(t4)
addi t3, t3, -1
beqz t3, .L_kmp_3
ld a6, 32(t4)
addi t3, t3, -1
beqz t3, .L_kmp_3
ld a7, 40(t4)
// Prepare any additional argument passed through the stack
addi t4, t4, 48
mv t1, sp
j .L_kmp_2
.L_kmp_1:
ld t2, 0(t4)
sd t2, 0(t1)
addi t4, t4, 8
addi t1, t1, 8
.L_kmp_2:
addi t3, t3, -1
bnez t3, .L_kmp_1
.L_kmp_3:
// Call pkfn function
jalr t0
// Restore stack and return
addi a0, zero, 1
addi sp, fp, -16
ld fp, 0(sp)
ld ra, 8(sp)
addi sp, sp, 16
ret
.Lfunc_end0:
.size __kmp_invoke_microtask, .Lfunc_end0-__kmp_invoke_microtask
.cfi_endproc
// -- End __kmp_invoke_microtask
#endif /* KMP_ARCH_RISCV64 */
#if KMP_ARCH_ARM || KMP_ARCH_MIPS
.data
.comm .gomp_critical_user_,32,8
@ -1574,7 +1741,7 @@ __kmp_unnamed_critical_addr:
.size __kmp_unnamed_critical_addr,4
#endif /* KMP_ARCH_ARM */
#if KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64
#if KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64
.data
.comm .gomp_critical_user_,32,8
.data
@ -1583,7 +1750,8 @@ __kmp_unnamed_critical_addr:
__kmp_unnamed_critical_addr:
.8byte .gomp_critical_user_
.size __kmp_unnamed_critical_addr,8
#endif /* KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 */
#endif /* KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64 ||
KMP_ARCH_RISCV64 */
#if KMP_OS_LINUX
# if KMP_ARCH_ARM

3
openmp/runtime/src/z_Linux_util.cpp
View File

@ -2331,7 +2331,8 @@ finish: // Clean up and exit.
#endif // USE_LOAD_BALANCE
#if !(KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_MIC || \
((KMP_OS_LINUX || KMP_OS_DARWIN) && KMP_ARCH_AARCH64) || KMP_ARCH_PPC64)
((KMP_OS_LINUX || KMP_OS_DARWIN) && KMP_ARCH_AARCH64) || \
KMP_ARCH_PPC64 || KMP_ARCH_RISCV64)
// we really only need the case with 1 argument, because CLANG always build
// a struct of pointers to shared variables referenced in the outlined function

20
openmp/runtime/test/ompt/callback.h
View File

@ -168,6 +168,26 @@ ompt_label_##id:
#define print_possible_return_addresses(addr) \
printf("%" PRIu64 ": current_address=%p or %p\n", ompt_get_thread_data()->value, \
((char *)addr) - 4, ((char *)addr) - 8)
#elif KMP_ARCH_RISCV64
#if __riscv_compressed
// On RV64GC the C.NOP instruction is 2 byte long. In addition, the compiler
// inserts a J instruction (targeting the successor basic block), which
// accounts for another 4 bytes. Finally, an additional J instruction may
// appear (adding 4 more bytes) when the C.NOP is referenced elsewhere (ie.
// another branch).
#define print_possible_return_addresses(addr) \
printf("%" PRIu64 ": current_address=%p or %p\n", \
ompt_get_thread_data()->value, ((char *)addr) - 6, ((char *)addr) - 10)
#else
// On RV64G the NOP instruction is 4 byte long. In addition, the compiler
// inserts a J instruction (targeting the successor basic block), which
// accounts for another 4 bytes. Finally, an additional J instruction may
// appear (adding 4 more bytes) when the NOP is referenced elsewhere (ie.
// another branch).
#define print_possible_return_addresses(addr) \
printf("%" PRIu64 ": current_address=%p or %p\n", \
ompt_get_thread_data()->value, ((char *)addr) - 8, ((char *)addr) - 12)
#endif
#else
#error Unsupported target architecture, cannot determine address offset!
#endif

7
openmp/runtime/tools/lib/Platform.pm
View File

@ -61,6 +61,8 @@ sub canon_arch($) {
$arch = "mips64";
} elsif ( $arch =~ m{\Amips} ) {
$arch = "mips";
} elsif ( $arch =~ m{\Ariscv64} ) {
$arch = "riscv64";
} else {
$arch = undef;
}; # if
@ -94,6 +96,7 @@ sub canon_mic_arch($) {
"mic" => "Intel(R) Many Integrated Core Architecture",
"mips" => "MIPS",
"mips64" => "MIPS64",
"riscv64" => "RISC-V (64-bit)",
);
sub legal_arch($) {
@ -220,6 +223,8 @@ sub target_options() {
$_host_arch = "mips64";
} elsif ( $hardware_platform eq "mips" ) {
$_host_arch = "mips";
} elsif ( $hardware_platform eq "riscv64" ) {
$_host_arch = "riscv64";
} else {
die "Unsupported host hardware platform: \"$hardware_platform\"; stopped";
}; # if
@ -409,7 +414,7 @@ the script assumes host architecture is target one.
Input string is an architecture name to canonize. The function recognizes many variants, for example:
C<32e>, C<Intel64>, C<Intel(R) 64>, etc. Returned string is a canononized architecture name,
one of: C<32>, C<32e>, C<64>, C<arm>, C<ppc64le>, C<ppc64>, C<mic>, C<mips>, C<mips64>, or C<undef> is input string is not recognized.
one of: C<32>, C<32e>, C<64>, C<arm>, C<ppc64le>, C<ppc64>, C<mic>, C<mips>, C<mips64>, C<riscv64> or C<undef> is input string is not recognized.
=item B<legal_arch( $arch )>

2
openmp/runtime/tools/lib/Uname.pm
View File

@ -156,6 +156,8 @@ if ( 0 ) {
$values{ hardware_platform } = "mips64";
} elsif ( $values{ machine } =~ m{\Amips\z} ) {
$values{ hardware_platform } = "mips";
} elsif ( $values{ machine } =~ m{\Ariscv64\z} ) {
$values{ hardware_platform } = "riscv64";
} else {
die "Unsupported machine (\"$values{ machine }\") returned by POSIX::uname(); stopped";
}; # if

1
openmp/www/README.txt
View File

@ -53,6 +53,7 @@ Architectures Supported
* IBM(R) Power architecture (big endian)
* IBM(R) Power architecture (little endian)
* MIPS and MIPS64 architectures
* RISC-V 64 bit architecture
Supported RTL Build Configurations
==================================

1
openmp/www/index.html
View File

@ -134,6 +134,7 @@
the Intel compiler.
</li>
<li>MIPS and MIPS64</li>
<li>RISC-V 64-bit</li>
</ul>
Ports to other architectures and operating systems are welcome.
</p>