diff options
Diffstat (limited to 'compiler/rustc_target/src/abi/call/msp430.rs')
-rw-r--r-- | compiler/rustc_target/src/abi/call/msp430.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/abi/call/msp430.rs b/compiler/rustc_target/src/abi/call/msp430.rs new file mode 100644 index 000000000..0ba73657b --- /dev/null +++ b/compiler/rustc_target/src/abi/call/msp430.rs @@ -0,0 +1,39 @@ +// Reference: MSP430 Embedded Application Binary Interface +// https://www.ti.com/lit/an/slaa534a/slaa534a.pdf + +use crate::abi::call::{ArgAbi, FnAbi}; + +// 3.5 Structures or Unions Passed and Returned by Reference +// +// "Structures (including classes) and unions larger than 32 bits are passed and +// returned by reference. To pass a structure or union by reference, the caller +// places its address in the appropriate location: either in a register or on +// the stack, according to its position in the argument list. (..)" +fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) { + if ret.layout.is_aggregate() && ret.layout.size.bits() > 32 { + ret.make_indirect(); + } else { + ret.extend_integer_width_to(16); + } +} + +fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) { + if arg.layout.is_aggregate() && arg.layout.size.bits() > 32 { + arg.make_indirect(); + } else { + arg.extend_integer_width_to(16); + } +} + +pub fn compute_abi_info<Ty>(fn_abi: &mut FnAbi<'_, Ty>) { + if !fn_abi.ret.is_ignore() { + classify_ret(&mut fn_abi.ret); + } + + for arg in &mut fn_abi.args { + if arg.is_ignore() { + continue; + } + classify_arg(arg); + } +} |