1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=i686-unknown-unknown -mcpu=core-avx-i -mattr=+rdseed | FileCheck %s --check-prefix=X86 3 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core-avx-i -mattr=+rdseed | FileCheck %s --check-prefix=X64 4 5 declare {i16, i32} @llvm.x86.rdseed.16() 6 declare {i32, i32} @llvm.x86.rdseed.32() 7 8 define i32 @_rdseed16_step(i16* %random_val) { 9 ; X86-LABEL: _rdseed16_step: 10 ; X86: # %bb.0: 11 ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx 12 ; X86-NEXT: rdseedw %ax 13 ; X86-NEXT: movzwl %ax, %edx 14 ; X86-NEXT: movl $1, %eax 15 ; X86-NEXT: cmovael %edx, %eax 16 ; X86-NEXT: movw %dx, (%ecx) 17 ; X86-NEXT: retl 18 ; 19 ; X64-LABEL: _rdseed16_step: 20 ; X64: # %bb.0: 21 ; X64-NEXT: rdseedw %ax 22 ; X64-NEXT: movzwl %ax, %ecx 23 ; X64-NEXT: movl $1, %eax 24 ; X64-NEXT: cmovael %ecx, %eax 25 ; X64-NEXT: movw %cx, (%rdi) 26 ; X64-NEXT: retq 27 %call = call {i16, i32} @llvm.x86.rdseed.16() 28 %randval = extractvalue {i16, i32} %call, 0 29 store i16 %randval, i16* %random_val 30 %isvalid = extractvalue {i16, i32} %call, 1 31 ret i32 %isvalid 32 } 33 34 define i32 @_rdseed32_step(i32* %random_val) { 35 ; X86-LABEL: _rdseed32_step: 36 ; X86: # %bb.0: 37 ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx 38 ; X86-NEXT: rdseedl %edx 39 ; X86-NEXT: movl $1, %eax 40 ; X86-NEXT: cmovael %edx, %eax 41 ; X86-NEXT: movl %edx, (%ecx) 42 ; X86-NEXT: retl 43 ; 44 ; X64-LABEL: _rdseed32_step: 45 ; X64: # %bb.0: 46 ; X64-NEXT: rdseedl %ecx 47 ; X64-NEXT: movl $1, %eax 48 ; X64-NEXT: cmovael %ecx, %eax 49 ; X64-NEXT: movl %ecx, (%rdi) 50 ; X64-NEXT: retq 51 %call = call {i32, i32} @llvm.x86.rdseed.32() 52 %randval = extractvalue {i32, i32} %call, 0 53 store i32 %randval, i32* %random_val 54 %isvalid = extractvalue {i32, i32} %call, 1 55 ret i32 %isvalid 56 } 57
