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::{Target, TargetOptions};
14 pub fn target() -> Target {
16 llvm_target: "thumbv7em-none-eabi".into(),
18 data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
21 options: TargetOptions {
23 max_atomic_width: Some(32),
24 ..super::thumb_base::opts()