49 lines
1.4 KiB
LLVM
49 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core-avx-i -mattr=+rdseed | FileCheck %s
|
|
|
|
declare {i16, i32} @llvm.x86.rdseed.16()
|
|
declare {i32, i32} @llvm.x86.rdseed.32()
|
|
declare {i64, i32} @llvm.x86.rdseed.64()
|
|
|
|
define i32 @_rdseed16_step(i16* %random_val) {
|
|
%call = call {i16, i32} @llvm.x86.rdseed.16()
|
|
%randval = extractvalue {i16, i32} %call, 0
|
|
store i16 %randval, i16* %random_val
|
|
%isvalid = extractvalue {i16, i32} %call, 1
|
|
ret i32 %isvalid
|
|
; CHECK-LABEL: _rdseed16_step:
|
|
; CHECK: rdseedw %ax
|
|
; CHECK: movzwl %ax, %ecx
|
|
; CHECK: movl $1, %eax
|
|
; CHECK: cmovael %ecx, %eax
|
|
; CHECK: movw %cx, (%r[[A0:di|cx]])
|
|
; CHECK: ret
|
|
}
|
|
|
|
define i32 @_rdseed32_step(i32* %random_val) {
|
|
%call = call {i32, i32} @llvm.x86.rdseed.32()
|
|
%randval = extractvalue {i32, i32} %call, 0
|
|
store i32 %randval, i32* %random_val
|
|
%isvalid = extractvalue {i32, i32} %call, 1
|
|
ret i32 %isvalid
|
|
; CHECK-LABEL: _rdseed32_step:
|
|
; CHECK: rdseedl %e[[T0:[a-z]+]]
|
|
; CHECK: movl $1, %eax
|
|
; CHECK: cmovael %e[[T0]], %eax
|
|
; CHECK: movl %e[[T0]], (%r[[A0]])
|
|
; CHECK: ret
|
|
}
|
|
|
|
define i32 @_rdseed64_step(i64* %random_val) {
|
|
%call = call {i64, i32} @llvm.x86.rdseed.64()
|
|
%randval = extractvalue {i64, i32} %call, 0
|
|
store i64 %randval, i64* %random_val
|
|
%isvalid = extractvalue {i64, i32} %call, 1
|
|
ret i32 %isvalid
|
|
; CHECK-LABEL: _rdseed64_step:
|
|
; CHECK: rdseedq %r[[T1:[a-z]+]]
|
|
; CHECK: movl $1, %eax
|
|
; CHECK: cmovael %e[[T1]], %eax
|
|
; CHECK: movq %r[[T1]], (%r[[A0]])
|
|
; CHECK: ret
|
|
}
|