| # =========================================================================== |
| # http://www.gnu.org/software/autoconf-archive/ax_ext.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_SSE |
| # |
| # DESCRIPTION |
| # |
| # Find SIMD extensions supported by compiler. The -m"simdextensionname" is |
| # added to SIMD_FLAGS if compiler supports it. For example, if "sse2" is |
| # available, then "-msse2" is added to SIMD_FLAGS. |
| # |
| # This macro calls: |
| # |
| # AC_SUBST(SIMD_FLAGS) |
| # |
| # And defines: |
| # |
| # HAVE_SSE3 / HAVE_SSE4.1 |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2007 Christophe Tournayre <turn3r@users.sourceforge.net> |
| # Copyright (c) 2013 Michael Petch <mpetch@capp-sysware.com> |
| # |
| # Copying and distribution of this file, with or without modification, are |
| # permitted in any medium without royalty provided the copyright notice |
| # and this notice are preserved. This file is offered as-is, without any |
| # warranty. |
| # |
| # NOTE: The functionality that requests the cpuid has been stripped because |
| # this project detects the CPU capabilities during runtime. However, we |
| # still need to check if the compiler supports the requested SIMD flag |
| |
| #serial 12 |
| |
| AC_DEFUN([AX_SSE], |
| [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| |
| AM_CONDITIONAL(HAVE_SSE3, false) |
| AM_CONDITIONAL(HAVE_SSE4_1, false) |
| |
| case $host_cpu in |
| i[[3456]]86*|x86_64*|amd64*) |
| AX_CHECK_COMPILE_FLAG(-msse3, ax_cv_support_sse3_ext=yes, []) |
| if test x"$ax_cv_support_sse3_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse3" |
| AC_DEFINE(HAVE_SSE3,, |
| [Support SSE3 (Streaming SIMD Extensions 3) instructions]) |
| AM_CONDITIONAL(HAVE_SSE3, true) |
| else |
| AC_MSG_WARN([Your compiler does not support SSE3 instructions]) |
| fi |
| |
| AX_CHECK_COMPILE_FLAG(-msse4.1, ax_cv_support_sse41_ext=yes, []) |
| if test x"$ax_cv_support_sse41_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse4.1" |
| AC_DEFINE(HAVE_SSE4_1,, |
| [Support SSE4.1 (Streaming SIMD Extensions 4.1) instructions]) |
| AM_CONDITIONAL(HAVE_SSE4_1, true) |
| else |
| AC_MSG_WARN([Your compiler does not support SSE4.1]) |
| fi |
| ;; |
| esac |
| |
| AC_SUBST(SIMD_FLAGS) |
| ]) |