File: rdrand-x86_64.ll

package info (click to toggle)
llvm-toolchain-7 1%3A7.0.1-8~deb9u3
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 733,456 kB
  • sloc: cpp: 3,776,651; ansic: 633,271; asm: 350,301; python: 142,716; objc: 107,612; sh: 22,626; lisp: 11,056; perl: 7,999; pascal: 6,742; ml: 5,537; awk: 3,536; makefile: 2,557; cs: 2,027; xml: 841; ruby: 156
file content (19 lines) | stat: -rw-r--r-- 671 bytes parent folder | download | duplicates (13) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core-avx-i -mattr=+rdrnd | FileCheck %s

declare {i64, i32} @llvm.x86.rdrand.64()

define i32 @_rdrand64_step(i64* %random_val) {
; CHECK-LABEL: _rdrand64_step:
; CHECK:       # %bb.0:
; CHECK-NEXT:    rdrandq %rcx
; CHECK-NEXT:    movl $1, %eax
; CHECK-NEXT:    cmovael %ecx, %eax
; CHECK-NEXT:    movq %rcx, (%rdi)
; CHECK-NEXT:    retq
  %call = call {i64, i32} @llvm.x86.rdrand.64()
  %randval = extractvalue {i64, i32} %call, 0
  store i64 %randval, i64* %random_val
  %isvalid = extractvalue {i64, i32} %call, 1
  ret i32 %isvalid
}