michael@0: dnl This Source Code Form is subject to the terms of the Mozilla Public
michael@0: dnl License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0: dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0: 
michael@0: AC_DEFUN([MOZ_ARCH_OPTS],
michael@0: [
michael@0: 
michael@0: dnl ========================================================
michael@0: dnl = ARM toolchain tweaks
michael@0: dnl ========================================================
michael@0: 
michael@0: MOZ_THUMB=toolchain-default
michael@0: MOZ_THUMB_INTERWORK=toolchain-default
michael@0: MOZ_FPU=toolchain-default
michael@0: MOZ_FLOAT_ABI=toolchain-default
michael@0: MOZ_SOFT_FLOAT=toolchain-default
michael@0: MOZ_ALIGN=toolchain-default
michael@0: 
michael@0: MOZ_ARG_WITH_STRING(arch,
michael@0: [  --with-arch=[[type|toolchain-default]]
michael@0:                            Use specific CPU features (-march=type). Resets
michael@0:                            thumb, fpu, float-abi, etc. defaults when set],
michael@0:     if test -z "$GNU_CC"; then
michael@0:         AC_MSG_ERROR([--with-arch is not supported on non-GNU toolchains])
michael@0:     fi
michael@0:     MOZ_ARCH=$withval)
michael@0: 
michael@0: if test -z "$MOZ_ARCH"; then
michael@0:     dnl Defaults
michael@0:     case "${CPU_ARCH}-${OS_TARGET}" in
michael@0:     arm-Android)
michael@0:         MOZ_THUMB=yes
michael@0:         MOZ_ARCH=armv7-a
michael@0:         MOZ_FPU=vfp
michael@0:         MOZ_FLOAT_ABI=softfp
michael@0:         MOZ_ALIGN=no
michael@0:         ;;
michael@0:     arm-Darwin)
michael@0:         MOZ_ARCH=toolchain-default
michael@0:         MOZ_THUMB=yes
michael@0:         ;;
michael@0:     esac
michael@0: fi
michael@0: 
michael@0: if test "$MOZ_ARCH" = "armv6" -a "$OS_TARGET" = "Android"; then
michael@0:    MOZ_FPU=vfp
michael@0: fi
michael@0: 
michael@0: MOZ_ARG_WITH_STRING(thumb,
michael@0: [  --with-thumb[[=yes|no|toolchain-default]]]
michael@0: [                          Use Thumb instruction set (-mthumb)],
michael@0:     if test -z "$GNU_CC"; then
michael@0:         AC_MSG_ERROR([--with-thumb is not supported on non-GNU toolchains])
michael@0:     fi
michael@0:     MOZ_THUMB=$withval)
michael@0: 
michael@0: MOZ_ARG_WITH_STRING(thumb-interwork,
michael@0: [  --with-thumb-interwork[[=yes|no|toolchain-default]]
michael@0:                            Use Thumb/ARM instuctions interwork (-mthumb-interwork)],
michael@0:     if test -z "$GNU_CC"; then
michael@0:         AC_MSG_ERROR([--with-thumb-interwork is not supported on non-GNU toolchains])
michael@0:     fi
michael@0:     MOZ_THUMB_INTERWORK=$withval)
michael@0: 
michael@0: MOZ_ARG_WITH_STRING(fpu,
michael@0: [  --with-fpu=[[type|toolchain-default]]
michael@0:                            Use specific FPU type (-mfpu=type)],
michael@0:     if test -z "$GNU_CC"; then
michael@0:         AC_MSG_ERROR([--with-fpu is not supported on non-GNU toolchains])
michael@0:     fi
michael@0:     MOZ_FPU=$withval)
michael@0: 
michael@0: MOZ_ARG_WITH_STRING(float-abi,
michael@0: [  --with-float-abi=[[type|toolchain-default]]
michael@0:                            Use specific arm float ABI (-mfloat-abi=type)],
michael@0:     if test -z "$GNU_CC"; then
michael@0:         AC_MSG_ERROR([--with-float-abi is not supported on non-GNU toolchains])
michael@0:     fi
michael@0:     MOZ_FLOAT_ABI=$withval)
michael@0: 
michael@0: MOZ_ARG_WITH_STRING(soft-float,
michael@0: [  --with-soft-float[[=yes|no|toolchain-default]]
michael@0:                            Use soft float library (-msoft-float)],
michael@0:     if test -z "$GNU_CC"; then
michael@0:         AC_MSG_ERROR([--with-soft-float is not supported on non-GNU toolchains])
michael@0:     fi
michael@0:     MOZ_SOFT_FLOAT=$withval)
michael@0: 
michael@0: case "$MOZ_ARCH" in
michael@0: toolchain-default|"")
michael@0:     arch_flag=""
michael@0:     ;;
michael@0: *)
michael@0:     arch_flag="-march=$MOZ_ARCH"
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: case "$MOZ_THUMB" in
michael@0: yes)
michael@0:     MOZ_THUMB2=1
michael@0:     thumb_flag="-mthumb"
michael@0:     ;;
michael@0: no)
michael@0:     MOZ_THUMB2=
michael@0:     thumb_flag="-marm"
michael@0:     ;;
michael@0: *)
michael@0:     _SAVE_CFLAGS="$CFLAGS"
michael@0:     CFLAGS="$arch_flag"
michael@0:     AC_TRY_COMPILE([],[return sizeof(__thumb2__);],
michael@0:         MOZ_THUMB2=1,
michael@0:         MOZ_THUMB2=)
michael@0:     CFLAGS="$_SAVE_CFLAGS"
michael@0:     thumb_flag=""
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: if test "$MOZ_THUMB2" = 1; then
michael@0:     AC_DEFINE(MOZ_THUMB2)
michael@0: fi
michael@0: 
michael@0: case "$MOZ_THUMB_INTERWORK" in
michael@0: yes)
michael@0:     thumb_interwork_flag="-mthumb-interwork"
michael@0:     ;;
michael@0: no)
michael@0:     thumb_interwork_flag="-mno-thumb-interwork"
michael@0:     ;;
michael@0: *) # toolchain-default
michael@0:     thumb_interwork_flag=""
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: case "$MOZ_FPU" in
michael@0: toolchain-default|"")
michael@0:     fpu_flag=""
michael@0:     ;;
michael@0: *)
michael@0:     fpu_flag="-mfpu=$MOZ_FPU"
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: case "$MOZ_FLOAT_ABI" in
michael@0: toolchain-default|"")
michael@0:     float_abi_flag=""
michael@0:     ;;
michael@0: *)
michael@0:     float_abi_flag="-mfloat-abi=$MOZ_FLOAT_ABI"
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: case "$MOZ_SOFT_FLOAT" in
michael@0: yes)
michael@0:     soft_float_flag="-msoft-float"
michael@0:     ;;
michael@0: no)
michael@0:     soft_float_flag="-mno-soft-float"
michael@0:     ;;
michael@0: *) # toolchain-default
michael@0:     soft_float_flag=""
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: case "$MOZ_ALIGN" in
michael@0: no)
michael@0:     align_flag="-mno-unaligned-access"
michael@0:     ;;
michael@0: yes)
michael@0:     align_flag="-munaligned-access"
michael@0:     ;;
michael@0: *)
michael@0:     align_flag=""
michael@0:     ;;
michael@0: esac
michael@0: 
michael@0: if test -n "$align_flag"; then
michael@0:   _SAVE_CFLAGS="$CFLAGS"
michael@0:   CFLAGS="$CFLAGS $align_flag"
michael@0:   AC_MSG_CHECKING(whether alignment flag ($align_flag) is supported)
michael@0:   AC_TRY_COMPILE([],[],,align_flag="")
michael@0:   CFLAGS="$_SAVE_CFLAGS"
michael@0: fi
michael@0: 
michael@0: dnl Use echo to avoid accumulating space characters
michael@0: all_flags=`echo $arch_flag $thumb_flag $thumb_interwork_flag $fpu_flag $float_abi_flag $soft_float_flag $align_flag`
michael@0: if test -n "$all_flags"; then
michael@0:     _SAVE_CFLAGS="$CFLAGS"
michael@0:     CFLAGS="$all_flags"
michael@0:     AC_MSG_CHECKING(whether the chosen combination of compiler flags ($all_flags) works)
michael@0:     AC_TRY_COMPILE([],[return 0;],
michael@0:         AC_MSG_RESULT([yes]),
michael@0:         AC_MSG_ERROR([no]))
michael@0: 
michael@0:     CFLAGS="$_SAVE_CFLAGS $all_flags"
michael@0:     CXXFLAGS="$CXXFLAGS $all_flags"
michael@0:     ASFLAGS="$ASFLAGS $all_flags"
michael@0:     if test -n "$thumb_flag"; then
michael@0:         LDFLAGS="$LDFLAGS $thumb_flag"
michael@0:     fi
michael@0: fi
michael@0: 
michael@0: AC_SUBST(MOZ_THUMB2)
michael@0: 
michael@0: if test "$CPU_ARCH" = "arm"; then
michael@0:   AC_MSG_CHECKING(for ARM SIMD support in compiler)
michael@0:   # We try to link so that this also fails when
michael@0:   # building with LTO.
michael@0:   AC_TRY_LINK([],
michael@0:                  [asm("uqadd8 r1, r1, r2");],
michael@0:                  result="yes", result="no")
michael@0:   AC_MSG_RESULT("$result")
michael@0:   if test "$result" = "yes"; then
michael@0:       AC_DEFINE(HAVE_ARM_SIMD)
michael@0:       HAVE_ARM_SIMD=1
michael@0:   fi
michael@0: 
michael@0:   AC_MSG_CHECKING(ARM version support in compiler)
michael@0:   dnl Determine the target ARM architecture (5 for ARMv5, v5T, v5E, etc.; 6 for ARMv6, v6K, etc.)
michael@0:   ARM_ARCH=`${CC-cc} ${CFLAGS} -dM -E - < /dev/null | sed -n 's/.*__ARM_ARCH_\([[0-9]][[0-9]]*\).*/\1/p'`
michael@0:   AC_MSG_RESULT("$ARM_ARCH")
michael@0: 
michael@0:   AC_MSG_CHECKING(for ARM NEON support in compiler)
michael@0:   # We try to link so that this also fails when
michael@0:   # building with LTO.
michael@0:   AC_TRY_LINK([],
michael@0:                  [asm(".fpu neon\n vadd.i8 d0, d0, d0");],
michael@0:                  result="yes", result="no")
michael@0:   AC_MSG_RESULT("$result")
michael@0:   if test "$result" = "yes"; then
michael@0:       AC_DEFINE(HAVE_ARM_NEON)
michael@0:       HAVE_ARM_NEON=1
michael@0: 
michael@0:       dnl We don't need to build NEON support if we're targetting a non-NEON device.
michael@0:       dnl This matches media/webrtc/trunk/webrtc/build/common.gypi.
michael@0:       if test -n "$ARM_ARCH"; then
michael@0:           if test "$ARM_ARCH" -lt 7; then
michael@0:               BUILD_ARM_NEON=
michael@0:           else
michael@0:               AC_DEFINE(BUILD_ARM_NEON)
michael@0:               BUILD_ARM_NEON=1
michael@0:           fi
michael@0:       fi
michael@0:   fi
michael@0: 
michael@0: fi # CPU_ARCH = arm
michael@0: 
michael@0: AC_SUBST(HAVE_ARM_SIMD)
michael@0: AC_SUBST(HAVE_ARM_NEON)
michael@0: AC_SUBST(BUILD_ARM_NEON)
michael@0: AC_SUBST(ARM_ARCH)
michael@0: 
michael@0: if test -n "$MOZ_ARCH"; then
michael@0:   NSPR_CONFIGURE_ARGS="$NSPR_CONFIGURE_ARGS --with-arch=$MOZ_ARCH"
michael@0:   NSPR_CONFIGURE_ARGS="$NSPR_CONFIGURE_ARGS --with-thumb=$MOZ_THUMB"
michael@0:   NSPR_CONFIGURE_ARGS="$NSPR_CONFIGURE_ARGS --with-thumb-interwork=$MOZ_THUMB_INTERWORK"
michael@0:   NSPR_CONFIGURE_ARGS="$NSPR_CONFIGURE_ARGS --with-fpu=$MOZ_FPU"
michael@0:   NSPR_CONFIGURE_ARGS="$NSPR_CONFIGURE_ARGS --with-float-abi=$MOZ_FLOAT_ABI"
michael@0:   NSPR_CONFIGURE_ARGS="$NSPR_CONFIGURE_ARGS --with-soft-float=$MOZ_SOFT_FLOAT"
michael@0: fi
michael@0: 
michael@0: ])