Add asm!() support for hexagon #73214
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
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| use super::{InlineAsmArch, InlineAsmType}; | ||
| use rustc_macros::HashStable_Generic; | ||
| use std::fmt; | ||
|
|
||
| def_reg_class! { | ||
| Hexagon HexagonInlineAsmRegClass { | ||
| reg, | ||
androm3da marked this conversation as resolved.
Show resolved
Hide resolved
|
||
| } | ||
| } | ||
|
|
||
| impl HexagonInlineAsmRegClass { | ||
| 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<&'static str>)] { | ||
| match self { | ||
| Self::reg => types! { _: I8, I16, I32, F32; }, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| def_regs! { | ||
| Hexagon HexagonInlineAsmReg HexagonInlineAsmRegClass { | ||
| r0: reg = ["r0"], | ||
| r1: reg = ["r1"], | ||
| 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 = ["r16"], | ||
| r17: reg = ["r17"], | ||
| r18: reg = ["r18"], | ||
| r19: reg = ["r19"], | ||
| r20: reg = ["r20"], | ||
| r21: reg = ["r21"], | ||
| r22: reg = ["r22"], | ||
| r23: reg = ["r23"], | ||
| r24: reg = ["r24"], | ||
| r25: reg = ["r25"], | ||
| r26: reg = ["r26"], | ||
| r27: reg = ["r27"], | ||
| r28: reg = ["r28"], | ||
| #error = ["r29", "sp"] => | ||
| "the stack pointer cannot be used as an operand for inline asm", | ||
| #error = ["r30", "fr"] => | ||
| "the frame register cannot be used as an operand for inline asm", | ||
| #error = ["r31", "lr"] => | ||
| "the link register cannot be used as an operand for inline asm", | ||
| } | ||
| } | ||
|
|
||
| impl HexagonInlineAsmReg { | ||
| pub fn emit( | ||
| self, | ||
| out: &mut dyn fmt::Write, | ||
| _arch: InlineAsmArch, | ||
| _modifier: Option<char>, | ||
| ) -> fmt::Result { | ||
| out.write_str(self.name()) | ||
| } | ||
|
|
||
| pub fn overlapping_regs(self, mut _cb: impl FnMut(HexagonInlineAsmReg)) {} | ||
| } | ||
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
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
All registers can be used as inputs on Hexagon, that is the architecture doesn't not differentiate between
r0andr29orr30, except for a small set of instructions which require fewer bits to encode registers. As a matter of fact, most loads/stores to stack are done viar29orr30(i.e.sporfp), and a return from a function that does not allocate stack space is done viajumpr r31.All of these registers can also be modified, but that's typically a bad idea.