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gerrit.osmocom.org / osmo-trx / 61fbf2ec95430d1f76f301de80e765114face5a2 / . / config / ax_sse.m4
blob: cf363a40e157760eb253e7ddfd1b5b96889c9aec [file] [log] [blame]
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]1# ===========================================================================
2# http://www.gnu.org/software/autoconf-archive/ax_ext.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
Vadim Yanitskiy61fbf2e2017-05-20 01:08:55 +0300[diff] [blame^]7# AX_SSE
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]8#
9# DESCRIPTION
10#
Vadim Yanitskiy61fbf2e2017-05-20 01:08:55 +0300[diff] [blame^]11# Find SIMD extensions supported by compiler. The -m"simdextensionname" is
12# added to SIMD_FLAGS if compiler supports it. For example, if "sse2" is
13# available, then "-msse2" is added to SIMD_FLAGS.
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]14#
15# This macro calls:
16#
17# AC_SUBST(SIMD_FLAGS)
18#
19# And defines:
20#
Vadim Yanitskiy61fbf2e2017-05-20 01:08:55 +0300[diff] [blame^]21# HAVE_SSE3 / HAVE_SSE4.1
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]22#
23# LICENSE
24#
25# Copyright (c) 2007 Christophe Tournayre <turn3r@users.sourceforge.net>
26# Copyright (c) 2013 Michael Petch <mpetch@capp-sysware.com>
27#
28# Copying and distribution of this file, with or without modification, are
29# permitted in any medium without royalty provided the copyright notice
30# and this notice are preserved. This file is offered as-is, without any
31# warranty.
Philipp Maierf5bf33b2017-03-16 13:12:07 +0100[diff] [blame]32#
33# NOTE: The functionality that requests the cpuid has been stripped because
34# this project detects the CPU capabilities during runtime. However, we
35# still need to check if the compiler supports the requested SIMD flag
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]36
37#serial 12
38
Philipp Maiere8ae9fc2017-03-20 12:08:42 +0100[diff] [blame]39AC_DEFUN([AX_SSE],
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]40[
41 AC_REQUIRE([AC_CANONICAL_HOST])
42
43 case $host_cpu in
44 i[[3456]]86*|x86_64*|amd64*)
45
46 AC_REQUIRE([AX_GCC_X86_CPUID])
47 AC_REQUIRE([AX_GCC_X86_AVX_XGETBV])
48
49 AX_GCC_X86_CPUID(0x00000001)
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]50
Philipp Maierf5bf33b2017-03-16 13:12:07 +0100[diff] [blame]51 AX_CHECK_COMPILE_FLAG(-msse3, ax_cv_support_sse3_ext=yes, [])
52 if test x"$ax_cv_support_sse3_ext" = x"yes"; then
53 SIMD_FLAGS="$SIMD_FLAGS -msse3"
54 AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions])
Philipp Maiere8ae9fc2017-03-20 12:08:42 +0100[diff] [blame]55 AM_CONDITIONAL(HAVE_SSE3, true)
Philipp Maierf5bf33b2017-03-16 13:12:07 +0100[diff] [blame]56 else
57 AC_MSG_WARN([Your compiler does not support sse3 instructions, can you try another compiler?])
Philipp Maiere8ae9fc2017-03-20 12:08:42 +0100[diff] [blame]58 AM_CONDITIONAL(HAVE_SSE3, false)
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]59 fi
60
Philipp Maierf5bf33b2017-03-16 13:12:07 +0100[diff] [blame]61 AX_CHECK_COMPILE_FLAG(-msse4.1, ax_cv_support_sse41_ext=yes, [])
62 if test x"$ax_cv_support_sse41_ext" = x"yes"; then
63 SIMD_FLAGS="$SIMD_FLAGS -msse4.1"
64 AC_DEFINE(HAVE_SSE4_1,,[Support SSE4.1 (Streaming SIMD Extensions 4.1) instructions])
Philipp Maiere8ae9fc2017-03-20 12:08:42 +0100[diff] [blame]65 AM_CONDITIONAL(HAVE_SSE4_1, true)
Philipp Maierf5bf33b2017-03-16 13:12:07 +0100[diff] [blame]66 else
67 AC_MSG_WARN([Your compiler does not support sse4.1 instructions, can you try another compiler?])
Philipp Maiere8ae9fc2017-03-20 12:08:42 +0100[diff] [blame]68 AM_CONDITIONAL(HAVE_SSE4_1, false)
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]69 fi
Thomas Tsou3eaae802013-08-20 19:31:14 -0400[diff] [blame]70 ;;
71 esac
72
73 AC_SUBST(SIMD_FLAGS)
74])