forked from rust-lang/rust
-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Auto merge of rust-lang#91224 - couchand:2021-11/avr-asm, r=Amanieu
Support AVR for inline asm! A first pass at support for the AVR platform in inline `asm!`. Passes the initial compiler tests, have not yet done more complete verification. In particular, the register classes could use a lot more fleshing out, this draft PR so far only includes the most basic. cc `@Amanieu` `@dylanmckay`
- Loading branch information
Showing
8 changed files
with
549 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,196 @@ | ||
| use super::{InlineAsmArch, InlineAsmType}; | ||
| use rustc_macros::HashStable_Generic; | ||
| use std::fmt; | ||
|
|
||
| def_reg_class! { | ||
| Avr AvrInlineAsmRegClass { | ||
| reg, | ||
| reg_upper, | ||
| reg_pair, | ||
| reg_iw, | ||
| reg_ptr, | ||
| } | ||
| } | ||
|
|
||
| impl AvrInlineAsmRegClass { | ||
| pub fn valid_modifiers(self, _arch: InlineAsmArch) -> &'static [char] { | ||
| match self { | ||
| Self::reg_pair | Self::reg_iw | Self::reg_ptr => &['h', 'l'], | ||
| _ => &[], | ||
| } | ||
| } | ||
|
|
||
| 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<&'static str>)] { | ||
| match self { | ||
| Self::reg => types! { _: I8; }, | ||
| Self::reg_upper => types! { _: I8; }, | ||
| Self::reg_pair => types! { _: I16; }, | ||
| Self::reg_iw => types! { _: I16; }, | ||
| Self::reg_ptr => types! { _: I16; }, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| def_regs! { | ||
| Avr AvrInlineAsmReg AvrInlineAsmRegClass { | ||
| r2: reg = ["r2"], | ||
| r3: reg = ["r3"], | ||
| r4: reg = ["r4"], | ||
| 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"], | ||
| r16: reg, reg_upper = ["r16"], | ||
| r17: reg, reg_upper = ["r17"], | ||
| r18: reg, reg_upper = ["r18"], | ||
| r19: reg, reg_upper = ["r19"], | ||
| r20: reg, reg_upper = ["r20"], | ||
| r21: reg, reg_upper = ["r21"], | ||
| r22: reg, reg_upper = ["r22"], | ||
| r23: reg, reg_upper = ["r23"], | ||
| r24: reg, reg_upper = ["r24"], | ||
| r25: reg, reg_upper = ["r25"], | ||
| r26: reg, reg_upper = ["r26", "XL"], | ||
| r27: reg, reg_upper = ["r27", "XH"], | ||
| r30: reg, reg_upper = ["r30", "ZL"], | ||
| r31: reg, reg_upper = ["r31", "ZH"], | ||
|
|
||
| r3r2: reg_pair = ["r3r2"], | ||
| r5r4: reg_pair = ["r5r4"], | ||
| r7r6: reg_pair = ["r7r6"], | ||
| r9r8: reg_pair = ["r9r8"], | ||
| r11r10: reg_pair = ["r11r10"], | ||
| r13r12: reg_pair = ["r13r12"], | ||
| r15r14: reg_pair = ["r15r14"], | ||
| r17r16: reg_pair = ["r17r16"], | ||
| r19r18: reg_pair = ["r19r18"], | ||
| r21r20: reg_pair = ["r21r20"], | ||
| r23r22: reg_pair = ["r23r22"], | ||
|
|
||
| r25r24: reg_iw, reg_pair = ["r25r24"], | ||
|
|
||
| X: reg_ptr, reg_iw, reg_pair = ["r27r26", "X"], | ||
| Z: reg_ptr, reg_iw, reg_pair = ["r31r30", "Z"], | ||
|
|
||
| #error = ["Y", "YL", "YH"] => | ||
| "the frame pointer cannot be used as an operand for inline asm", | ||
| #error = ["SP", "SPL", "SPH"] => | ||
| "the stack pointer cannot be used as an operand for inline asm", | ||
| #error = ["r0", "r1", "r1r0"] => | ||
| "r0 and r1 are not available due to an issue in LLVM", | ||
| } | ||
| } | ||
|
|
||
| macro_rules! emit_pairs { | ||
| ( | ||
| $self:ident $modifier:ident, | ||
| $($pair:ident $name:literal $hi:literal $lo:literal,)* | ||
| ) => { | ||
| match ($self, $modifier) { | ||
| $( | ||
| (AvrInlineAsmReg::$pair, Some('h')) => $hi, | ||
| (AvrInlineAsmReg::$pair, Some('l')) => $lo, | ||
| (AvrInlineAsmReg::$pair, _) => $name, | ||
| )* | ||
| _ => $self.name(), | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| impl AvrInlineAsmReg { | ||
| pub fn emit( | ||
| self, | ||
| out: &mut dyn fmt::Write, | ||
| _arch: InlineAsmArch, | ||
| modifier: Option<char>, | ||
| ) -> fmt::Result { | ||
| let name = emit_pairs! { | ||
| self modifier, | ||
| Z "Z" "ZH" "ZL", | ||
| X "X" "XH" "XL", | ||
| r25r24 "r25:r24" "r25" "r24", | ||
| r23r22 "r23:r22" "r23" "r22", | ||
| r21r20 "r21:r20" "r21" "r20", | ||
| r19r18 "r19:r18" "r19" "r18", | ||
| r17r16 "r17:r16" "r17" "r16", | ||
| r15r14 "r15:r14" "r15" "r14", | ||
| r13r12 "r13:r12" "r13" "r12", | ||
| r11r10 "r11:r10" "r11" "r10", | ||
| r9r8 "r9:r8" "r9" "r8", | ||
| r7r6 "r7:r6" "r7" "r6", | ||
| r5r4 "r5:r4" "r5" "r4", | ||
| r3r2 "r3:r2" "r3" "r2", | ||
| }; | ||
| out.write_str(name) | ||
| } | ||
|
|
||
| pub fn overlapping_regs(self, mut cb: impl FnMut(AvrInlineAsmReg)) { | ||
| cb(self); | ||
|
|
||
| macro_rules! reg_conflicts { | ||
| ( | ||
| $( | ||
| $pair:ident : $hi:ident $lo:ident, | ||
| )* | ||
| ) => { | ||
| match self { | ||
| $( | ||
| Self::$pair => { | ||
| cb(Self::$hi); | ||
| cb(Self::$lo); | ||
| } | ||
| Self::$hi => { | ||
| cb(Self::$pair); | ||
| } | ||
| Self::$lo => { | ||
| cb(Self::$pair); | ||
| } | ||
| )* | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| reg_conflicts! { | ||
| Z : r31 r30, | ||
| X : r27 r26, | ||
| r25r24 : r25 r24, | ||
| r23r22 : r23 r22, | ||
| r21r20 : r21 r20, | ||
| r19r18 : r19 r18, | ||
| r17r16 : r17 r16, | ||
| r15r14 : r15 r14, | ||
| r13r12 : r13 r12, | ||
| r11r10 : r11 r10, | ||
| r9r8 : r9 r8, | ||
| r7r6 : r7 r6, | ||
| r5r4 : r5 r4, | ||
| r3r2 : r3 r2, | ||
| } | ||
| } | ||
| } |
Oops, something went wrong.