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Merged
merged 3 commits into from
Jun 22, 2020
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inline-asm: Update for new style #623

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bf2fa74
inline-asm: Update for new style
joshtriplett Jun 20, 2020
8846466
inline-asm: Outdent
joshtriplett Jun 21, 2020
7ce097e
inline asm: Update play link
joshtriplett Jun 21, 2020
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23 changes: 11 additions & 12 deletions posts/inside-rust/2020-06-08-new-inline-asm.md
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Original file line number Diff line number Diff line change
Expand Up @@ -94,17 +94,16 @@ fn main() {
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:
",
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
Expand All @@ -117,7 +116,7 @@ fn main() {
```

(You can [try this example on the
playground](https://play.rust-lang.org/?version=nightly&mode=release&edition=2018&gist=38874735e48aa20289f23f5a3cbeae0c).
playground](https://play.rust-lang.org/?version=nightly&mode=release&edition=2018&gist=894a407f0fe858559aa378edf6ec4801).
Note that this code serves to demonstrate inline assembly, not to demonstrate
an efficient implementation of any particular algorithm.)

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