2021-06-24 09:01:49 -05:00
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// only-aarch64
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2020-02-20 03:19:48 -06:00
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2021-12-09 18:15:33 -06:00
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#![feature(asm_const)]
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use std::arch::{asm, global_asm};
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2020-02-20 03:19:48 -06:00
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fn main() {
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let mut foo = 0;
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let mut bar = 0;
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unsafe {
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asm!();
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//~^ ERROR requires at least a template string argument
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asm!(foo);
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//~^ ERROR asm template must be a string literal
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asm!("{}" foo);
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//~^ ERROR expected token: `,`
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asm!("{}", foo);
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2021-07-29 06:43:26 -05:00
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//~^ ERROR expected operand, clobber_abi, options, or additional template string
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2020-02-20 03:19:48 -06:00
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asm!("{}", in foo);
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//~^ ERROR expected `(`, found `foo`
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asm!("{}", in(reg foo));
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//~^ ERROR expected `)`, found `foo`
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asm!("{}", in(reg));
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//~^ ERROR expected expression, found end of macro arguments
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asm!("{}", inout(=) foo => bar);
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//~^ ERROR expected register class or explicit register
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asm!("{}", inout(reg) foo =>);
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//~^ ERROR expected expression, found end of macro arguments
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asm!("{}", in(reg) foo => bar);
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//~^ ERROR expected one of `!`, `,`, `.`, `::`, `?`, `{`, or an operator, found `=>`
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asm!("{}", sym foo + bar);
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2022-02-28 18:54:28 -06:00
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//~^ ERROR expected a path for argument to `sym`
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2020-02-20 03:19:48 -06:00
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asm!("", options(foo));
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//~^ ERROR expected one of
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asm!("", options(nomem foo));
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//~^ ERROR expected one of
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asm!("", options(nomem, foo));
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//~^ ERROR expected one of
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asm!("{}", options(), const foo);
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//~^ ERROR arguments are not allowed after options
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2021-04-05 23:50:55 -05:00
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//~^^ ERROR attempt to use a non-constant value in a constant
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2021-07-29 06:43:26 -05:00
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asm!("", clobber_abi(foo));
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//~^ ERROR expected string literal
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asm!("", clobber_abi("C" foo));
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2021-11-12 09:30:20 -06:00
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//~^ ERROR expected one of `)` or `,`, found `foo`
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2021-07-29 06:43:26 -05:00
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asm!("", clobber_abi("C", foo));
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2021-11-12 09:30:20 -06:00
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//~^ ERROR expected string literal
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2021-07-29 06:43:26 -05:00
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asm!("{}", clobber_abi("C"), const foo);
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//~^ ERROR arguments are not allowed after clobber_abi
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//~^^ ERROR attempt to use a non-constant value in a constant
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asm!("", options(), clobber_abi("C"));
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//~^ ERROR clobber_abi is not allowed after options
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asm!("{}", options(), clobber_abi("C"), const foo);
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//~^ ERROR clobber_abi is not allowed after options
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2020-02-20 03:19:48 -06:00
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asm!("{a}", a = const foo, a = const bar);
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//~^ ERROR duplicate argument named `a`
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//~^^ ERROR argument never used
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2021-04-05 23:50:55 -05:00
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//~^^^ ERROR attempt to use a non-constant value in a constant
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//~^^^^ ERROR attempt to use a non-constant value in a constant
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2021-06-24 09:01:49 -05:00
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asm!("", a = in("x0") foo);
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2020-02-20 03:19:48 -06:00
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//~^ ERROR explicit register arguments cannot have names
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2021-06-24 09:01:49 -05:00
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asm!("{a}", in("x0") foo, a = const bar);
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2020-02-20 03:19:48 -06:00
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//~^ ERROR named arguments cannot follow explicit register arguments
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2021-04-05 23:50:55 -05:00
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//~^^ ERROR attempt to use a non-constant value in a constant
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2021-06-24 09:01:49 -05:00
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asm!("{a}", in("x0") foo, a = const bar);
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2020-02-20 03:19:48 -06:00
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//~^ ERROR named arguments cannot follow explicit register arguments
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2021-04-05 23:50:55 -05:00
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//~^^ ERROR attempt to use a non-constant value in a constant
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2021-06-24 09:01:49 -05:00
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asm!("{1}", in("x0") foo, const bar);
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2020-02-20 03:19:48 -06:00
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//~^ ERROR positional arguments cannot follow named arguments or explicit register arguments
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2021-04-05 23:50:55 -05:00
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//~^^ ERROR attempt to use a non-constant value in a constant
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asm: Allow multiple template strings; interpret them as newline-separated
Allow the `asm!` macro to accept a series of template arguments, and
interpret them as if they were concatenated with a '\n' between them.
This allows writing an `asm!` where each line of assembly appears in a
separate template string argument.
This syntax makes it possible for rustfmt to reliably format and indent
each line of assembly, without risking changes to the inside of a
template string. It also avoids the complexity of having the user
carefully format and indent a multi-line string (including where to put
the surrounding quotes), and avoids the extra indentation and lines of a
call to `concat!`.
For example, rewriting the second example from the [blog post on the new
inline assembly
syntax](https://blog.rust-lang.org/inside-rust/2020/06/08/new-inline-asm.html)
using multiple template strings:
```rust
fn main() {
let mut bits = [0u8; 64];
for value in 0..=1024u64 {
let popcnt;
unsafe {
asm!(
" popcnt {popcnt}, {v}",
"2:",
" blsi rax, {v}",
" jz 1f",
" xor {v}, rax",
" tzcnt rax, rax",
" stosb",
" jmp 2b",
"1:",
v = inout(reg) value => _,
popcnt = out(reg) popcnt,
out("rax") _, // scratch
inout("rdi") bits.as_mut_ptr() => _,
);
}
println!("bits of {}: {:?}", value, &bits[0..popcnt]);
}
}
```
Note that all the template strings must appear before all other
arguments; you cannot, for instance, provide a series of template
strings intermixed with the corresponding operands.
In order to get srcloc mappings right for macros that generate
multi-line string literals, create one line_span for each
line in the string literal, each pointing to the macro.
Make `rustc_parse_format::Parser::curarg` `pub`, so that we can
propagate it from one template string argument to the next.
2020-06-15 01:33:55 -05:00
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asm!("", options(), "");
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//~^ ERROR expected one of
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asm!("{}", in(reg) foo, "{}", out(reg) foo);
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//~^ ERROR expected one of
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asm!(format!("{{{}}}", 0), in(reg) foo);
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//~^ ERROR asm template must be a string literal
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asm!("{1}", format!("{{{}}}", 0), in(reg) foo, out(reg) bar);
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//~^ ERROR asm template must be a string literal
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2021-09-06 10:44:19 -05:00
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asm!("{}", in(reg) _);
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//~^ ERROR _ cannot be used for input operands
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asm!("{}", inout(reg) _);
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//~^ ERROR _ cannot be used for input operands
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asm!("{}", inlateout(reg) _);
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//~^ ERROR _ cannot be used for input operands
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2020-02-20 03:19:48 -06:00
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}
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}
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2021-04-13 12:11:11 -05:00
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const FOO: i32 = 1;
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const BAR: i32 = 2;
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global_asm!();
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//~^ ERROR requires at least a template string argument
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global_asm!(FOO);
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//~^ ERROR asm template must be a string literal
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global_asm!("{}" FOO);
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//~^ ERROR expected token: `,`
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global_asm!("{}", FOO);
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//~^ ERROR expected operand, options, or additional template string
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global_asm!("{}", const);
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//~^ ERROR expected expression, found end of macro arguments
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global_asm!("{}", const(reg) FOO);
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//~^ ERROR expected one of
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global_asm!("", options(FOO));
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//~^ ERROR expected one of
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global_asm!("", options(nomem FOO));
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//~^ ERROR expected one of
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global_asm!("", options(nomem, FOO));
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//~^ ERROR expected one of
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global_asm!("{}", options(), const FOO);
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//~^ ERROR arguments are not allowed after options
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2021-07-29 06:43:26 -05:00
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global_asm!("", clobber_abi(FOO));
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//~^ ERROR expected string literal
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global_asm!("", clobber_abi("C" FOO));
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2021-11-12 09:30:20 -06:00
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//~^ ERROR expected one of `)` or `,`, found `FOO`
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2021-07-29 06:43:26 -05:00
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global_asm!("", clobber_abi("C", FOO));
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2021-11-12 09:30:20 -06:00
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//~^ ERROR expected string literal
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2021-07-29 06:43:26 -05:00
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global_asm!("{}", clobber_abi("C"), const FOO);
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//~^ ERROR arguments are not allowed after clobber_abi
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//~^^ ERROR `clobber_abi` cannot be used with `global_asm!`
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global_asm!("", options(), clobber_abi("C"));
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//~^ ERROR clobber_abi is not allowed after options
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global_asm!("{}", options(), clobber_abi("C"), const FOO);
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//~^ ERROR clobber_abi is not allowed after options
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2021-04-13 12:11:11 -05:00
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global_asm!("{a}", a = const FOO, a = const BAR);
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//~^ ERROR duplicate argument named `a`
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//~^^ ERROR argument never used
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global_asm!("", options(), "");
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//~^ ERROR expected one of
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global_asm!("{}", const FOO, "{}", const FOO);
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//~^ ERROR expected one of
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global_asm!(format!("{{{}}}", 0), const FOO);
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//~^ ERROR asm template must be a string literal
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global_asm!("{1}", format!("{{{}}}", 0), const FOO, const BAR);
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//~^ ERROR asm template must be a string literal
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