1 files changed, 81 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/asm/msp430.rs b/compiler/rustc_target/src/asm/msp430.rs
new file mode 100644
index 00000000000..a27d6390a72
--- /dev/null
+++ b/compiler/rustc_target/src/asm/msp430.rs
@@ -0,0 +1,81 @@
+use super::{InlineAsmArch, InlineAsmType};
+use rustc_macros::HashStable_Generic;
+use rustc_span::Symbol;
+use std::fmt;
+
+def_reg_class! {
+    Msp430 Msp430InlineAsmRegClass {
+        reg,
+    }
+}
+
+impl Msp430InlineAsmRegClass {
+    pub fn valid_modifiers(self, _arch: super::InlineAsmArch) -> &'static [char] {
+        &[]
+    }
+
+    pub fn suggest_class(self, _arch: InlineAsmArch, _ty: InlineAsmType) -> Option<Self> {
+        None
+    }
+
+    pub fn suggest_modifier(
+        self,
+        _arch: InlineAsmArch,
+        _ty: InlineAsmType,
+    ) -> Option<(char, &'static str)> {
+        None
+    }
+
+    pub fn default_modifier(self, _arch: InlineAsmArch) -> Option<(char, &'static str)> {
+        None
+    }
+
+    pub fn supported_types(
+        self,
+        arch: InlineAsmArch,
+    ) -> &'static [(InlineAsmType, Option<Symbol>)] {
+        match (self, arch) {
+            (Self::reg, _) => types! { _: I8, I16; },
+        }
+    }
+}
+
+// The reserved registers are taken from:
+// https://github.com/llvm/llvm-project/blob/36cb29cbbe1b22dcd298ad65e1fabe899b7d7249/llvm/lib/Target/MSP430/MSP430RegisterInfo.cpp#L73.
+def_regs! {
+    Msp430 Msp430InlineAsmReg Msp430InlineAsmRegClass {
+        r5: reg = ["r5"],
+        r6: reg = ["r6"],
+        r7: reg = ["r7"],
+        r8: reg = ["r8"],
+        r9: reg = ["r9"],
+        r10: reg = ["r10"],
+        r11: reg = ["r11"],
+        r12: reg = ["r12"],
+        r13: reg = ["r13"],
+        r14: reg = ["r14"],
+        r15: reg = ["r15"],
+
+        #error = ["r0", "pc"] =>
+            "the program counter cannot be used as an operand for inline asm",
+        #error = ["r1", "sp"] =>
+            "the stack pointer cannot be used as an operand for inline asm",
+        #error = ["r2", "sr"] =>
+            "the status register cannot be used as an operand for inline asm",
+        #error = ["r3", "cg"] =>
+            "the constant generator cannot be used as an operand for inline asm",
+        #error = ["r4", "fp"] =>
+            "the frame pointer cannot be used as an operand for inline asm",
+    }
+}
+
+impl Msp430InlineAsmReg {
+    pub fn emit(
+        self,
+        out: &mut dyn fmt::Write,
+        _arch: InlineAsmArch,
+        _modifier: Option<char>,
+    ) -> fmt::Result {
+        out.write_str(self.name())
+    }
+}