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Fix Armv8-M Baseline compilation 

Armv8-M Baseline, ie thumbv8m.base-none-eabi, is a superset of the
Armv6-M architecture profile. As it shares almost the same instruction
set, this commit copies the configuration for thumbv6m-none-eabi to
enable it.
This commit is contained in:
Hugues de Valon 2019-03-07 19:24:15 +00:00
parent fafaacecd1
commit c924aed0b9
3 changed files with 11 additions and 10 deletions
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11
build.rs
View File

@ -49,10 +49,11 @@ fn main() {
println!("cargo:rustc-cfg=thumb")
}
// compiler-rt `cfg`s away some intrinsics for thumbv6m because that target doesn't have full
// THUMBv2 support. We have to cfg our code accordingly.
if llvm_target[0] == "thumbv6m" {
println!("cargo:rustc-cfg=thumbv6m")
// compiler-rt `cfg`s away some intrinsics for thumbv6m and thumbv8m.base because
// these targets do not have full Thumb-2 support but only original Thumb-1.
// We have to cfg our code accordingly.
if llvm_target[0] == "thumbv6m" || llvm_target[0] == "thumbv8m.base" {
println!("cargo:rustc-cfg=thumb_1")
}
// Only emit the ARM Linux atomic emulation on pre-ARMv6 architectures.
@ -407,7 +408,7 @@ mod c {
}
// Remove the assembly implementations that won't compile for the target
if llvm_target[0] == "thumbv6m" {
if llvm_target[0] == "thumbv6m" || llvm_target[0] == "thumbv8m.base" {
sources.remove(
&[
"clzdi2",

6
src/int/sdiv.rs
View File

@ -74,8 +74,8 @@ intrinsics! {
#[use_c_shim_if(all(target_arch = "arm",
not(target_os = "ios"),
not(target_env = "msvc")),
not(thumbv6m))]
not(target_env = "msvc"),
not(thumb_1)))]
pub extern "C" fn __modsi3(a: i32, b: i32) -> i32 {
a.mod_(b)
}
@ -91,7 +91,7 @@ intrinsics! {
}
#[use_c_shim_if(all(target_arch = "arm", not(target_env = "msvc"),
not(target_os = "ios"), not(thumbv6m)))]
not(target_os = "ios"), not(thumb_1)))]
pub extern "C" fn __divmodsi4(a: i32, b: i32, rem: &mut i32) -> i32 {
a.divmod(b, rem, |a, b| __divsi3(a, b))
}

4
src/int/udiv.rs
View File

@ -212,7 +212,7 @@ intrinsics! {
#[use_c_shim_if(all(target_arch = "arm",
not(target_os = "ios"),
not(target_env = "msvc"),
not(thumbv6m)))]
not(thumb_1)))]
/// Returns `n % d`
pub extern "C" fn __umodsi3(n: u32, d: u32) -> u32 {
let q = __udivsi3(n, d);
@ -222,7 +222,7 @@ intrinsics! {
#[use_c_shim_if(all(target_arch = "arm",
not(target_os = "ios"),
not(target_env = "msvc"),
not(thumbv6m)))]
not(thumb_1)))]
/// Returns `n / d` and sets `*rem = n % d`
pub extern "C" fn __udivmodsi4(n: u32, d: u32, rem: Option<&mut u32>) -> u32 {
let q = __udivsi3(n, d);