File: ctlz.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (56 lines) | stat: -rw-r--r-- 1,382 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
//@ compile-flags: -C no-prepopulate-passes

#![crate_type = "lib"]
#![feature(core_intrinsics)]

use std::intrinsics::{ctlz, ctlz_nonzero};

// CHECK-LABEL: @ctlz_u16
#[no_mangle]
pub unsafe fn ctlz_u16(x: u16) -> u32 {
    // CHECK: %[[tmp:.*]] = call i16 @llvm.ctlz.i16(i16 %x, i1 false)
    // CHECK: zext i16 %[[tmp]] to i32
    ctlz(x)
}

// CHECK-LABEL: @ctlz_nzu16
#[no_mangle]
pub unsafe fn ctlz_nzu16(x: u16) -> u32 {
    // CHECK: %[[tmp:.*]] = call i16 @llvm.ctlz.i16(i16 %x, i1 true)
    // CHECK: zext i16 %[[tmp]] to i32
    ctlz_nonzero(x)
}

// CHECK-LABEL: @ctlz_u32
#[no_mangle]
pub unsafe fn ctlz_u32(x: u32) -> u32 {
    // CHECK: call i32 @llvm.ctlz.i32(i32 %x, i1 false)
    // CHECK-NOT: zext
    // CHECK-NOT: trunc
    ctlz(x)
}

// CHECK-LABEL: @ctlz_nzu32
#[no_mangle]
pub unsafe fn ctlz_nzu32(x: u32) -> u32 {
    // CHECK: call i32 @llvm.ctlz.i32(i32 %x, i1 true)
    // CHECK-NOT: zext
    // CHECK-NOT: trunc
    ctlz_nonzero(x)
}

// CHECK-LABEL: @ctlz_u64
#[no_mangle]
pub unsafe fn ctlz_u64(x: u64) -> u32 {
    // CHECK: %[[tmp:.*]] = call i64 @llvm.ctlz.i64(i64 %x, i1 false)
    // CHECK: trunc i64 %[[tmp]] to i32
    ctlz(x)
}

// CHECK-LABEL: @ctlz_nzu64
#[no_mangle]
pub unsafe fn ctlz_nzu64(x: u64) -> u32 {
    // CHECK: %[[tmp:.*]] = call i64 @llvm.ctlz.i64(i64 %x, i1 true)
    // CHECK: trunc i64 %[[tmp]] to i32
    ctlz_nonzero(x)
}