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arm: build: Support -mcpu= on ARM and ARM64

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klzgrad 2020-05-19 23:42:14 +08:00
parent 81ee8b0df5
commit 1bc2be77d1
2 changed files with 19 additions and 2 deletions
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5
src/build/config/arm.gni
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@ -37,6 +37,8 @@ if (current_cpu == "arm" || v8_current_cpu == "arm") {
# Thumb is a reduced instruction set available on some ARM processors that # Thumb is a reduced instruction set available on some ARM processors that
# has increased code density. # has increased code density.
arm_use_thumb = true arm_use_thumb = true
arm_cpu = ""
} }
# For lacros build, we use ARM v8 by default. # For lacros build, we use ARM v8 by default.
@ -130,6 +132,9 @@ if (current_cpu == "arm" || v8_current_cpu == "arm") {
# arm64 supports only "hard". # arm64 supports only "hard".
arm_float_abi = "hard" arm_float_abi = "hard"
arm_use_neon = true arm_use_neon = true
declare_args() {
arm_cpu = ""
}
declare_args() { declare_args() {
# Enables the new Armv8 branch protection features. Valid strings are: # Enables the new Armv8 branch protection features. Valid strings are:
# - "pac": Enables Pointer Authentication Code (PAC, featured in Armv8.3) # - "pac": Enables Pointer Authentication Code (PAC, featured in Armv8.3)

16
src/build/config/compiler/BUILD.gn
View File

@ -846,7 +846,11 @@ config("compiler") {
# TODO(pcc): The contents of .ARM.attributes should be based on the # TODO(pcc): The contents of .ARM.attributes should be based on the
# -march flag passed at compile time (see llvm.org/pr36291). # -march flag passed at compile time (see llvm.org/pr36291).
if (current_cpu == "arm") { if (current_cpu == "arm") {
ldflags += [ "-march=$arm_arch" ] if (arm_cpu != "") {
ldflags += [ "-mcpu=$arm_cpu" ]
} else {
ldflags += [ "-march=$arm_arch" ]
}
} }
} }
@ -1227,9 +1231,14 @@ config("compiler_cpu_abi") {
} }
if (!is_nacl) { if (!is_nacl) {
cflags += [ cflags += [
"-march=$arm_arch",
"-mfloat-abi=$arm_float_abi", "-mfloat-abi=$arm_float_abi",
] ]
if (arm_cpu != "") {
cflags += [ "-mcpu=$arm_cpu" ]
} else {
cflags += [ "-march=$arm_arch" ]
}
ldflags += [ "-mfloat-abi=$arm_float_abi" ]
} }
if (arm_tune != "") { if (arm_tune != "") {
cflags += [ "-mtune=$arm_tune" ] cflags += [ "-mtune=$arm_tune" ]
@ -1240,6 +1249,9 @@ config("compiler_cpu_abi") {
cflags += [ "--target=aarch64-linux-gnu" ] cflags += [ "--target=aarch64-linux-gnu" ]
ldflags += [ "--target=aarch64-linux-gnu" ] ldflags += [ "--target=aarch64-linux-gnu" ]
} }
if (arm_cpu != "") {
cflags += [ "-mcpu=$arm_cpu" ]
}
} else if (current_cpu == "mipsel" && !is_nacl) { } else if (current_cpu == "mipsel" && !is_nacl) {
ldflags += [ "-Wl,--hash-style=sysv" ] ldflags += [ "-Wl,--hash-style=sysv" ]
if (custom_toolchain == "") { if (custom_toolchain == "") {