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configure can select simd vector length

This commit is contained in:
Florian Ballenegger 2020-08-07 16:53:10 +02:00
parent 859fc15812
commit 09d192eed2
1 changed files with 113 additions and 26 deletions
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139
configure.ac
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@ -1184,14 +1184,32 @@ if test "x$enable_openmp" = xyes; then
fi
################# MODSIMD ##################################################
# --enable-modsimd: define MODSIMD in the code. This use simd acceleration in devices code
# --enable-modsimd=N: define MODSIMD in the code with vector length N.
# This use simd acceleration in devices code
AC_ARG_ENABLE([modsimd],
[AS_HELP_STRING([--enable-modsimd], [Enable simd acceleration in some device models])])
[AS_HELP_STRING([--enable-modsimd[=yes/no/2/4/8]], [Enable simd acceleration in some device models. Value specify the simd vector length ("yes" default to 4).])])
# --with-sleef: Use SLEEF vector math library. Default is "no".
AC_ARG_WITH([sleef],
[AS_HELP_STRING([--with-sleef[=yes/no]], [Use SLEEF vector math library in SIMD models. Default=no.])])
if test "x$enable_modsimd" = xyes; then
enable_modsimd=yes
nsimd=4
fi
if test "x$enable_modsimd" = x4; then
enable_modsimd=yes
nsimd=4
fi
if test "x$enable_modsimd" = x2; then
enable_modsimd=yes
nsimd=2
fi
if test "x$enable_modsimd" = x8; then
enable_modsimd=yes
nsimd=8
fi
if test "x$enable_modsimd" = xyes; then
OPENMPSIMD_CFLAGS="-fopenmp-simd"
@ -1214,46 +1232,84 @@ fi
# now check if intrinsics can be used
if test "x$enable_modsimd" = xyes; then
AC_MSG_CHECKING([x86 blend intrinsics])
AC_TRY_COMPILE([
#include <x86intrin.h>
typedef double Vec4d __attribute__ ((vector_size (4*sizeof(double)), aligned (4*sizeof(double))));
],[
Vec4d v1,v2;
v1 = (Vec4d) {1.0,2.0,3.141592,4.0};
v2 = v1 + 10.1;
v2 = _mm256_blendv_pd(v1,v2,(Vec4d) (v1>3.0));
],[
AC_MSG_RESULT([yes])
have_intrinsics=yes
], [
AC_MSG_RESULT([no])
have_intrinsics=no
])
have_intrinsics=no
have_libmvec=no
have_sleef=no
if test "x$nsimd" = x2; then
AC_MSG_CHECKING([x86 blend intrinsics NSIMD=2])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[[#include <x86intrin.h>
typedef double Vec2d __attribute__ ((vector_size (2*sizeof(double))));]],
[[Vec2d v1 = (Vec2d) {1,2};
v1 = _mm_blendv_pd(v1,v1+1,(Vec2d) (v1>3.0)); ]])],
[
AC_MSG_RESULT([yes])
have_intrinsics=yes
],[
AC_MSG_RESULT([no])
] )
fi
if test "x$nsimd" = x4; then
AC_MSG_CHECKING([x86 blend intrinsics NSIMD=4])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[[#include <x86intrin.h>
typedef double Vec4d __attribute__ ((vector_size (4*sizeof(double))));]],
[[Vec4d v1 = (Vec4d) {1,2,1.2,3.3};
v1 = _mm256_blendv_pd(v1,v1+1,(Vec4d) (v1>3.0)); ]])],
[
AC_MSG_RESULT([yes])
have_intrinsics=yes
],[
AC_MSG_RESULT([no])
])
fi
fi
# do we want to use SLEEF ?
if test "x$enable_modsimd" = xyes; then
if test "x$with_sleef" = xyes; then
AC_CHECK_HEADERS([sleef.h])
AC_CHECK_LIB([sleef], [Sleef_logd4_u35],
if test "x$nsimd" = x4; then
AC_CHECK_HEADERS([sleef.h])
AC_CHECK_LIB([sleef], [Sleef_logd4_u35],
[AC_DEFINE([HAVE_LIBSLEEF], [], [Have SLEEF vector math library])
LIBS="$LIBS -lsleef"
have_sleef=yes
AC_MSG_RESULT([Use SLEEF])
], [have_sleef=no]
)
fi
if test "x$nsimd" = x2; then
AC_CHECK_HEADERS([sleef.h])
AC_CHECK_LIB([sleef], [Sleef_logd2_u35],
[AC_DEFINE([HAVE_LIBSLEEF], [], [Have SLEEF vector math library])
LIBS="$LIBS -lsleef"
have_sleef=yes
AC_MSG_RESULT([Use SLEEF])
], [have_sleef=no]
)
fi
if test "x$nsimd" = x8; then
AC_CHECK_HEADERS([sleef.h])
AC_CHECK_LIB([sleef], [Sleef_logd8_u35],
[AC_DEFINE([HAVE_LIBSLEEF], [], [Have SLEEF vector math library])
LIBS="$LIBS -lsleef"
have_sleef=yes
AC_MSG_RESULT([Use SLEEF])
], [have_sleef=no]
)
fi
fi
fi
# otherwise test if we can use libmvec or equivalent
if test "x$have_intrinsics" = xyes; then
if test "x$have_sleef" != xyes; then
AC_MSG_CHECKING([vector math library])
AC_LINK_IFELSE(
[
AC_MSG_CHECKING([vector math library libmvec])
have_libmvec=no
if test "x$nsimd" = x4; then
AC_LINK_IFELSE([
AC_LANG_PROGRAM(
[[
#include <math.h>
@ -1265,14 +1321,36 @@ if test "x$have_sleef" != xyes; then
v1 = (Vec4d) {1.0,2.0,3.141592,4.0};
v2 = _ZGVdN4v_log(v1);
v1 = _ZGVdN4v_exp(v2);
]])
],[
]]) ],[
AC_MSG_RESULT([yes])
have_libmvec=yes
],[
AC_MSG_RESULT([no])
have_libmvec=no
])
fi
if test "x$nsimd" = x2; then
AC_LINK_IFELSE([
AC_LANG_PROGRAM(
[[
#include <math.h>
typedef double Vec2d __attribute__ ((vector_size (2*sizeof(double)), aligned (2*sizeof(double))));
Vec2d _ZGVbN2v_exp(Vec2d x);
Vec2d _ZGVbN2v_log(Vec2d x);
]],[[
Vec2d v1,v2;
v1 = (Vec2d) {1.0,2.0};
v2 = _ZGVbN2v_exp(v1);
v1 = _ZGVbN2v_log(v2);
]]) ],[
AC_MSG_RESULT([yes])
have_libmvec=yes
],[
AC_MSG_RESULT([no])
have_libmvec=no
])
fi
fi
fi
@ -1305,7 +1383,16 @@ fi
if test "x$enable_modsimd" = xyes; then
AC_DEFINE([BSIM3v32SIMD], [1], [simd acceleration for BSIM3V32 device])
AC_DEFINE([MODSIMD], [1], [simd acceleration for some device models])
if test "x$nsimd" = x4; then
AC_DEFINE([NSIMD], [4], [simd vector length])
fi
if test "x$nsimd" = x2; then
AC_DEFINE([NSIMD], [2], [simd vector length])
fi
if test "x$nsimd" = x8; then
AC_DEFINE([NSIMD], [8], [simd vector length])
fi
if test "x$have_intrinsics" = xyes; then
AC_DEFINE([USEX86INTRINSICS], [1], [can use x86 simd intrinsics])
AC_MSG_RESULT([Use x86 simd intrinsics])