1 // Targets the Cortex-M4 and Cortex-M7 processors (ARMv7E-M)
3 // This target assumes that the device doesn't have a FPU (Floating Point Unit) and lowers all the
4 // floating point operations to software routines (intrinsics).
6 // As such, this target uses the "soft" calling convention (ABI) where floating point values are
7 // passed to/from subroutines via general purpose registers (R0, R1, etc.).
9 // To opt-in to hardware accelerated floating point operations, you can use, for example,
10 // `-C target-feature=+vfp4` or `-C target-cpu=cortex-m4`.
12 use crate::spec::{LinkerFlavor, LldFlavor, Target, TargetOptions, TargetResult};
14 pub fn target() -> TargetResult {
16 llvm_target: "thumbv7em-none-eabi".to_string(),
17 target_endian: "little".to_string(),
18 target_pointer_width: "32".to_string(),
19 target_c_int_width: "32".to_string(),
20 data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
21 arch: "arm".to_string(),
22 target_os: "none".to_string(),
23 target_env: String::new(),
24 target_vendor: String::new(),
25 linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
27 options: TargetOptions { max_atomic_width: Some(32), ..super::thumb_base::opts() },