acle/hints: use asm! for __nop

japaric · gnzlbg · commit 2c8c8f0699be · 2019-02-18T19:29:13.000+01:00
addresses #557 (comment)
diff --git a/crates/core_arch/src/acle/hints.rs b/crates/core_arch/src/acle/hints.rs
@@ -114,7 +114,7 @@ pub unsafe fn __dbg(imm4: u32) {
 /// will increase execution time.
 #[inline(always)]
 pub unsafe fn __nop() {
-    hint(HINT_NOP);
+    asm!("NOP" : : : : "volatile")
 }
 
 extern "C" {

Original file line number	Diff line number	Diff line change
`@@ -114,7 +114,7 @@ pub unsafe fn __dbg(imm4: u32) {`
`114`	`114`	`/// will increase execution time.`
`115`	`115`	`#[inline(always)]`
`116`	`116`	`pub unsafe fn __nop() {`
`117`		`- hint(HINT_NOP);`
	`117`	`+ asm!("NOP" : : : : "volatile")`
`118`	`118`	`}`
`119`	`119`
`120`	`120`	`extern "C" {`