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Merged
merged 6 commits into from
Nov 11, 2018
Merged

add __breakpoint #558

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60dd557
add __breakpoint
japaric Sep 3, 2018
2612dcb
remove TODO; add link to doc comment
japaric Sep 3, 2018
9dd9eda
fix assert_instr test
japaric Sep 3, 2018
1585686
fix typo
japaric Sep 3, 2018
520e786
aarch64 support and range validation
japaric Sep 15, 2018
e072463
do not validate the argument to the __breakpoint intrinsic
gnzlbg Nov 11, 2018
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59 changes: 59 additions & 0 deletions coresimd/arm/armclang.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,59 @@
//! ARM compiler specific intrinsics
//!
//! # References
//!
//! - [ARM Compiler v 6.10 - armclang Reference Guide][arm_comp_ref]
//!
//! [arm_comp_ref]: https://developer.arm.com/docs/100067/0610

#[cfg(test)]
use stdsimd_test::assert_instr;

/// Inserts a breakpoint instruction.
///
/// `val` is a compile-time constant integer in range `[0, 255]`.
///
/// The breakpoint instruction inserted is:
///
/// * `BKPT` when compiling as T32,
/// * `BRK` when compiling as A32 or A64.
///
/// # Safety
///
/// If `val` is out-of-range the behavior is **undefined**.
///
/// # Note
///
/// [ARM's documentation][arm_docs] defines that `__breakpoint` accepts the
/// following values for `val`:
///
/// - `0...65535` when compiling as A32 or A64,
/// - `0...255` when compiling as T32.
///
/// The current implementation only accepts values in range `[0, 255]` - if the
/// value is out-of-range the behavior is **undefined**.
///
/// [arm_docs]: https://developer.arm.com/docs/100067/latest/compiler-specific-intrinsics/__breakpoint-intrinsic
#[cfg_attr(all(test, target_arch = "arm"), assert_instr(bkpt, val = 0))]
#[cfg_attr(all(test, target_arch = "aarch64"), assert_instr(brk, val = 0))]
#[inline(always)]
#[rustc_args_required_const(0)]
pub unsafe fn __breakpoint(val: i32) {
#[cfg(target_arch = "arm")]
macro_rules! call {
($imm8:expr) => {
asm!(concat!("BKPT ", stringify!($imm8)) : : : : "volatile")
}
}

#[cfg(target_arch = "aarch64")]
macro_rules! call {
($imm8:expr) => {
asm!(concat!("BRK ", stringify!($imm8)) : : : : "volatile")
}
}

// We can't `panic!` inside this intrinsic, so we can't really validate the
// arguments here. If `val` is out-of-range this macro uses `val == 255`:
constify_imm8!(val, call);
}
4 changes: 4 additions & 0 deletions coresimd/arm/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,10 @@
//! [arm_dat]: https://developer.arm.com/technologies/neon/intrinsics
#![allow(non_camel_case_types)]

mod armclang;

pub use self::armclang::*;

#[cfg(any(target_feature = "mclass", dox))]
mod cmsis;
#[cfg(any(target_feature = "mclass", dox))]
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264 changes: 264 additions & 0 deletions coresimd/macros.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,269 @@
//! Utility macros.

macro_rules! constify_imm8 {
($imm8:expr, $expand:ident) => {
#[allow(overflowing_literals)]
match ($imm8) & 0b1111_1111 {
0 => $expand!(0),
1 => $expand!(1),
2 => $expand!(2),
3 => $expand!(3),
4 => $expand!(4),
5 => $expand!(5),
6 => $expand!(6),
7 => $expand!(7),
8 => $expand!(8),
9 => $expand!(9),
10 => $expand!(10),
11 => $expand!(11),
12 => $expand!(12),
13 => $expand!(13),
14 => $expand!(14),
15 => $expand!(15),
16 => $expand!(16),
17 => $expand!(17),
18 => $expand!(18),
19 => $expand!(19),
20 => $expand!(20),
21 => $expand!(21),
22 => $expand!(22),
23 => $expand!(23),
24 => $expand!(24),
25 => $expand!(25),
26 => $expand!(26),
27 => $expand!(27),
28 => $expand!(28),
29 => $expand!(29),
30 => $expand!(30),
31 => $expand!(31),
32 => $expand!(32),
33 => $expand!(33),
34 => $expand!(34),
35 => $expand!(35),
36 => $expand!(36),
37 => $expand!(37),
38 => $expand!(38),
39 => $expand!(39),
40 => $expand!(40),
41 => $expand!(41),
42 => $expand!(42),
43 => $expand!(43),
44 => $expand!(44),
45 => $expand!(45),
46 => $expand!(46),
47 => $expand!(47),
48 => $expand!(48),
49 => $expand!(49),
50 => $expand!(50),
51 => $expand!(51),
52 => $expand!(52),
53 => $expand!(53),
54 => $expand!(54),
55 => $expand!(55),
56 => $expand!(56),
57 => $expand!(57),
58 => $expand!(58),
59 => $expand!(59),
60 => $expand!(60),
61 => $expand!(61),
62 => $expand!(62),
63 => $expand!(63),
64 => $expand!(64),
65 => $expand!(65),
66 => $expand!(66),
67 => $expand!(67),
68 => $expand!(68),
69 => $expand!(69),
70 => $expand!(70),
71 => $expand!(71),
72 => $expand!(72),
73 => $expand!(73),
74 => $expand!(74),
75 => $expand!(75),
76 => $expand!(76),
77 => $expand!(77),
78 => $expand!(78),
79 => $expand!(79),
80 => $expand!(80),
81 => $expand!(81),
82 => $expand!(82),
83 => $expand!(83),
84 => $expand!(84),
85 => $expand!(85),
86 => $expand!(86),
87 => $expand!(87),
88 => $expand!(88),
89 => $expand!(89),
90 => $expand!(90),
91 => $expand!(91),
92 => $expand!(92),
93 => $expand!(93),
94 => $expand!(94),
95 => $expand!(95),
96 => $expand!(96),
97 => $expand!(97),
98 => $expand!(98),
99 => $expand!(99),
100 => $expand!(100),
101 => $expand!(101),
102 => $expand!(102),
103 => $expand!(103),
104 => $expand!(104),
105 => $expand!(105),
106 => $expand!(106),
107 => $expand!(107),
108 => $expand!(108),
109 => $expand!(109),
110 => $expand!(110),
111 => $expand!(111),
112 => $expand!(112),
113 => $expand!(113),
114 => $expand!(114),
115 => $expand!(115),
116 => $expand!(116),
117 => $expand!(117),
118 => $expand!(118),
119 => $expand!(119),
120 => $expand!(120),
121 => $expand!(121),
122 => $expand!(122),
123 => $expand!(123),
124 => $expand!(124),
125 => $expand!(125),
126 => $expand!(126),
127 => $expand!(127),
128 => $expand!(128),
129 => $expand!(129),
130 => $expand!(130),
131 => $expand!(131),
132 => $expand!(132),
133 => $expand!(133),
134 => $expand!(134),
135 => $expand!(135),
136 => $expand!(136),
137 => $expand!(137),
138 => $expand!(138),
139 => $expand!(139),
140 => $expand!(140),
141 => $expand!(141),
142 => $expand!(142),
143 => $expand!(143),
144 => $expand!(144),
145 => $expand!(145),
146 => $expand!(146),
147 => $expand!(147),
148 => $expand!(148),
149 => $expand!(149),
150 => $expand!(150),
151 => $expand!(151),
152 => $expand!(152),
153 => $expand!(153),
154 => $expand!(154),
155 => $expand!(155),
156 => $expand!(156),
157 => $expand!(157),
158 => $expand!(158),
159 => $expand!(159),
160 => $expand!(160),
161 => $expand!(161),
162 => $expand!(162),
163 => $expand!(163),
164 => $expand!(164),
165 => $expand!(165),
166 => $expand!(166),
167 => $expand!(167),
168 => $expand!(168),
169 => $expand!(169),
170 => $expand!(170),
171 => $expand!(171),
172 => $expand!(172),
173 => $expand!(173),
174 => $expand!(174),
175 => $expand!(175),
176 => $expand!(176),
177 => $expand!(177),
178 => $expand!(178),
179 => $expand!(179),
180 => $expand!(180),
181 => $expand!(181),
182 => $expand!(182),
183 => $expand!(183),
184 => $expand!(184),
185 => $expand!(185),
186 => $expand!(186),
187 => $expand!(187),
188 => $expand!(188),
189 => $expand!(189),
190 => $expand!(190),
191 => $expand!(191),
192 => $expand!(192),
193 => $expand!(193),
194 => $expand!(194),
195 => $expand!(195),
196 => $expand!(196),
197 => $expand!(197),
198 => $expand!(198),
199 => $expand!(199),
200 => $expand!(200),
201 => $expand!(201),
202 => $expand!(202),
203 => $expand!(203),
204 => $expand!(204),
205 => $expand!(205),
206 => $expand!(206),
207 => $expand!(207),
208 => $expand!(208),
209 => $expand!(209),
210 => $expand!(210),
211 => $expand!(211),
212 => $expand!(212),
213 => $expand!(213),
214 => $expand!(214),
215 => $expand!(215),
216 => $expand!(216),
217 => $expand!(217),
218 => $expand!(218),
219 => $expand!(219),
220 => $expand!(220),
221 => $expand!(221),
222 => $expand!(222),
223 => $expand!(223),
224 => $expand!(224),
225 => $expand!(225),
226 => $expand!(226),
227 => $expand!(227),
228 => $expand!(228),
229 => $expand!(229),
230 => $expand!(230),
231 => $expand!(231),
232 => $expand!(232),
233 => $expand!(233),
234 => $expand!(234),
235 => $expand!(235),
236 => $expand!(236),
237 => $expand!(237),
238 => $expand!(238),
239 => $expand!(239),
240 => $expand!(240),
241 => $expand!(241),
242 => $expand!(242),
243 => $expand!(243),
244 => $expand!(244),
245 => $expand!(245),
246 => $expand!(246),
247 => $expand!(247),
248 => $expand!(248),
249 => $expand!(249),
250 => $expand!(250),
251 => $expand!(251),
252 => $expand!(252),
253 => $expand!(253),
254 => $expand!(254),
_ => $expand!(255),
}
};
}

#[allow(unused)]
macro_rules! types {
($(
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