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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /build/moz.configure/arm.configure | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'build/moz.configure/arm.configure')
-rw-r--r-- | build/moz.configure/arm.configure | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/build/moz.configure/arm.configure b/build/moz.configure/arm.configure new file mode 100644 index 0000000000..5d26f4d732 --- /dev/null +++ b/build/moz.configure/arm.configure @@ -0,0 +1,305 @@ +# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*- +# vim: set filetype=python: +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + + +@depends(target.os) +def arm_option_defaults(os): + if os == "Android": + arch = "armv7-a" + thumb = "yes" + fpu = "neon" + float_abi = "softfp" + else: + arch = thumb = fpu = float_abi = "toolchain-default" + return namespace( + arch=arch, + thumb=thumb, + fpu=fpu, + float_abi=float_abi, + ) + + +# Note: '{...|}' in the help of all options with a non-constant default to +# make the lint happy. The first arm is always going to be used, because a +# default is always returned. The lint is fooled by this file being +# conditional. If it weren't conditional, the lint wouldn't ask for '{|}' to +# be there. +option( + "--with-arch", + nargs=1, + default=arm_option_defaults.arch, + help="{Use specific CPU features (-march=type). Resets thumb, fpu, " + "float-abi, etc. defaults when set|}", +) + + +@depends("--with-arch") +def arch_option(value): + if value: + if value[0] != "toolchain-default": + return ["-march={}".format(value[0])] + return [] + + +option( + "--with-thumb", + choices=("yes", "no", "toolchain-default"), + default=arm_option_defaults.thumb, + nargs="?", + help="{Use Thumb instruction set (-mthumb)|}", +) + + +def normalize_arm_option(value): + if value: + if len(value): + if value[0] == "yes": + return True + elif value[0] == "no": + return False + else: + return value[0] + return True + return False + + +@depends("--with-thumb") +def thumb_option(value): + value = normalize_arm_option(value) + if value is True: + return ["-mthumb"] + if value is False: + return ["-marm"] + return [] + + +option( + "--with-thumb-interwork", + choices=("yes", "no", "toolchain-default"), + default="toolchain-default", + nargs="?", + help="Use Thumb/ARM instuctions interwork (-mthumb-interwork)", +) + + +@depends("--with-thumb-interwork") +def thumb_interwork_option(value): + value = normalize_arm_option(value) + if value is True: + return ["-mthumb-interwork"] + if value is False: + return ["-mno-thumb-interwork"] + return [] + + +option( + "--with-fpu", + nargs=1, + default=arm_option_defaults.fpu, + help="{Use specific FPU type (-mfpu=type)|}", +) + + +@depends("--with-fpu") +def fpu_option(value): + if value: + if value[0] != "toolchain-default": + return ["-mfpu={}".format(value[0])] + return [] + + +option( + "--with-float-abi", + nargs=1, + default=arm_option_defaults.float_abi, + help="{Use specific arm float ABI (-mfloat-abi=type)|}", +) + + +@depends("--with-float-abi") +def float_abi_option(value): + if value: + if value[0] != "toolchain-default": + return ["-mfloat-abi={}".format(value[0])] + return [] + + +option( + "--with-soft-float", + choices=("yes", "no", "toolchain-default"), + default="toolchain-default", + nargs="?", + help="Use soft float library (-msoft-float)", +) + + +@depends("--with-soft-float") +def soft_float_option(value): + value = normalize_arm_option(value) + if value is True: + return ["-msoft-float"] + if value is False: + return ["-mno-soft-float"] + return [] + + +check_and_add_flag( + "-mno-unaligned-access", when=depends(target.os)(lambda os: os == "Android") +) + + +# The set of flags that clang understands +@depends( + arch_option, + thumb_option, + fpu_option, + float_abi_option, + soft_float_option, +) +def all_clang_arm_flags(arch, thumb, fpu, float_abi, soft_float): + return arch + thumb + fpu + float_abi + soft_float + + +# All the flags the compiler understands. When the compiler is clang, this +# still includes unsupported flags, but we live it to configure to fail +# during a compiler check. These checks aren't available for clang as used +# by bindgen, so we keep the separate set of flags for clang for bindgen. +@depends(all_clang_arm_flags, thumb_interwork_option) +def all_arm_flags(flags, interwork): + return flags + interwork + + +add_old_configure_assignment("_ARM_FLAGS", all_arm_flags) +add_old_configure_assignment("_THUMB_FLAGS", thumb_option) + + +@depends(configure_cache, c_compiler, all_arm_flags) +@checking("ARM version support in compiler", lambda x: x.arm_arch) +@imports(_from="textwrap", _import="dedent") +def arm_target(configure_cache, compiler, all_arm_flags): + # We're going to preprocess the following source to figure out some details + # about the arm target options we have enabled. + source = dedent( + """\ + %ARM_ARCH __ARM_ARCH + #if __thumb2__ + %THUMB2 yes + #else + %THUMB2 no + #endif + // Confusingly, the __SOFTFP__ preprocessor variable indicates the + // "softfloat" ABI, not the "softfp" ABI. + #if __SOFTFP__ + %FLOAT_ABI soft + #elif __ARM_PCS_VFP + %FLOAT_ABI hard + #else + %FLOAT_ABI softfp + #endif + // There is more subtlety to it than this preprocessor test, but MOZ_FPU doesn't + // need to be too fine-grained. + #if __ARM_NEON + %FPU neon + #elif __ARM_VFPV2__ || __ARM_FP == 12 + %FPU vfpv2 + #elif __ARM_VFPV3__ + %FPU vfpv3 + #elif __ARM_VFPV4__ || __ARM_FP == 14 + %FPU vfpv4 + #elif __ARM_FPV5__ + %FPU fp-armv8 + #endif + """ + ) + result = try_invoke_compiler( + configure_cache, + [compiler.compiler] + compiler.flags, + compiler.language, + source, + ["-E"] + all_arm_flags, + wrapper=compiler.wrapper, + ) + # Metadata emitted by preprocessors such as GCC with LANG=ja_JP.utf-8 may + # have non-ASCII characters. Treat the output as bytearray. + data = {"fpu": None} # fpu may not get a value from the preprocessor. + for line in result.splitlines(): + if line.startswith("%"): + k, _, v = line.partition(" ") + k = k.lstrip("%").lower() + if k == "arm_arch": + data[k] = int(v) + else: + data[k] = { + "yes": True, + "no": False, + }.get(v, v) + log.debug("%s = %s", k, data[k]) + + return namespace(**data) + + +@depends(arm_target.arm_arch, when=depends(target.os)(lambda os: os == "Android")) +def armv7(arch): + if arch < 7: + die("Android/armv6 and earlier are not supported") + + +set_config("MOZ_THUMB2", True, when=arm_target.thumb2) +set_define("MOZ_THUMB2", True, when=arm_target.thumb2) + + +have_arm_simd = c_compiler.try_compile( + body='asm("uqadd8 r1, r1, r2");', check_msg="for ARM SIMD support in compiler" +) + +set_config("HAVE_ARM_SIMD", have_arm_simd) +set_define("HAVE_ARM_SIMD", have_arm_simd) + +have_arm_neon = c_compiler.try_compile( + body='asm(".fpu neon\\n vadd.i8 d0, d0, d0");', + check_msg="for ARM NEON support in compiler", +) + +set_config("HAVE_ARM_NEON", have_arm_neon) +set_define("HAVE_ARM_NEON", have_arm_neon) + + +# We don't need to build NEON support if we're targetting a non-NEON device. +# This matches media/webrtc/trunk/webrtc/build/common.gypi. +@depends(arm_target.arm_arch, when=have_arm_neon) +def build_arm_neon(arm_arch): + return arm_arch >= 7 + + +set_config("BUILD_ARM_NEON", True, when=build_arm_neon) +set_define("BUILD_ARM_NEON", True, when=build_arm_neon) + + +set_config("ARM_ARCH", depends(arm_target.arm_arch)(lambda x: str(x))) +set_config("MOZ_FPU", arm_target.fpu) + + +@depends(arm_target) +def neon_flags(arm_target): + # Building with -mfpu=neon requires either the "softfp" or the + # "hardfp" ABI. Depending on the compiler's default target, and the + # CFLAGS, the default ABI might be neither, in which case it is the + # "softfloat" ABI. + # The "softfloat" ABI is binary-compatible with the "softfp" ABI, so + # we can safely mix code built with both ABIs. So, if we detect + # that compiling uses the "softfloat" ABI, force the use of the + # "softfp" ABI instead. + flags = ["-mfpu=neon"] + if arm_target.float_abi == "soft": + flags.append("-mfloat-abi=softfp") + if arm_target.arm_arch < 7: + # clang needs to be forced to at least armv7 for -mfpu=neon to do + # something. + flags.append("-march=armv7-a") + return tuple(flags) + + +set_config("NEON_FLAGS", neon_flags) |