compiler/rustc_target/src/spec/thumbv7em_none_eabi.rs

   1 // Targets the Cortex-M4 and Cortex-M7 processors (ARMv7E-M)
   2 //
   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).
   5 //
   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.).
   8 //
   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`.
  11
  12 use crate::spec::{Target, TargetOptions};
  13
  14 pub fn target() -> Target {
  15     Target {
  16         llvm_target: "thumbv7em-none-eabi".to_string(),
  17         pointer_width: 32,
  18         data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
  19         arch: "arm".to_string(),
  20
  21         options: TargetOptions {
  22             abi: "eabi".to_string(),
  23             max_atomic_width: Some(32),
  24             ..super::thumb_base::opts()
  25         },
  26     }
  27 }