ARM: Create configure option --enable-arm-neon to govern assembly optimizations

This commit is contained in:
Ben Avison 2019-10-24 21:17:05 -04:00
parent 74846657ec
commit a6bfdd103f
2 changed files with 40 additions and 0 deletions

View File

@ -1339,6 +1339,44 @@ dnl SOURCES="$SOURCES $srcdir/src/video/arm/pixman-arm-simd*.c"
fi fi
} }
dnl Check for ARM NEON instruction support using gas syntax
CheckNEON()
{
AC_ARG_ENABLE(arm-neon,
AC_HELP_STRING([--enable-arm-neon], [use NEON assembly blitters on ARM [[default=yes]]]),
enable_arm_neon=$enableval, enable_arm_neon=yes)
if test x$enable_video = xyes -a x$enable_assembly = xyes -a x$enable_arm_neon = xyes; then
save_CFLAGS="$CFLAGS"
have_arm_neon=no
CFLAGS="-x assembler-with-cpp $CFLAGS"
AC_MSG_CHECKING(for ARM NEON)
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
.text
.fpu neon
.arch armv7a
.object_arch armv4
.eabi_attribute 10, 0
.arm
.altmacro
#ifndef __ARM_EABI__
#error EABI is required (to be sure that calling conventions are compatible)
#endif
pld [r0]
vmovn.u16 d0, q0
]])], have_arm_neon=yes)
AC_MSG_RESULT($have_arm_neon)
CFLAGS="$save_CFLAGS"
if test x$have_arm_neon = xyes; then
AC_DEFINE(SDL_ARM_NEON_BLITTERS)
dnl SOURCES="$SOURCES $srcdir/src/video/arm/pixman-arm-neon*.c"
SOURCES="$SOURCES $srcdir/src/video/arm/pixman-arm-neon*.S"
fi
fi
}
dnl See if GCC's -fvisibility=hidden is supported (gcc4 and later, usually). dnl See if GCC's -fvisibility=hidden is supported (gcc4 and later, usually).
dnl Details of this flag are here: http://gcc.gnu.org/wiki/Visibility dnl Details of this flag are here: http://gcc.gnu.org/wiki/Visibility
CheckVisibilityHidden() CheckVisibilityHidden()
@ -3433,6 +3471,7 @@ case "$host" in
CheckDummyAudio CheckDummyAudio
CheckDLOPEN CheckDLOPEN
CheckARM CheckARM
CheckNEON
CheckOSS CheckOSS
CheckALSA CheckALSA
CheckPulseAudio CheckPulseAudio

View File

@ -408,6 +408,7 @@
#undef SDL_ASSEMBLY_ROUTINES #undef SDL_ASSEMBLY_ROUTINES
#undef SDL_ALTIVEC_BLITTERS #undef SDL_ALTIVEC_BLITTERS
#undef SDL_ARM_SIMD_BLITTERS #undef SDL_ARM_SIMD_BLITTERS
#undef SDL_ARM_NEON_BLITTERS
/* Enable ime support */ /* Enable ime support */
#undef SDL_USE_IME #undef SDL_USE_IME