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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-07-12 09:31:43 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-07-12 09:31:43 +0000 |
| commit | b9bee0499553358e64c34cfcbd32380ac7fb452e (patch) | |
| tree | a9168a3d1d6d1ffbafb4fcee06089d72972ed532 /test | |
| parent | 4e8982a34da69effe23ce9c553680b19d7d57551 (diff) | |
| download | external_llvm-b9bee0499553358e64c34cfcbd32380ac7fb452e.zip external_llvm-b9bee0499553358e64c34cfcbd32380ac7fb452e.tar.gz external_llvm-b9bee0499553358e64c34cfcbd32380ac7fb452e.tar.bz2 | |
Add intrinsics for Ivy Bridge's rdrand instruction.
The rdrand/cmov sequence is the same that is emitted by both
GCC and ICC.
Fixes PR13284.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160117 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/rdrand.ll | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/test/CodeGen/X86/rdrand.ll b/test/CodeGen/X86/rdrand.ll new file mode 100644 index 0000000..7bb25b3 --- /dev/null +++ b/test/CodeGen/X86/rdrand.ll @@ -0,0 +1,47 @@ +; RUN: llc < rdrand.ll -march=x86-64 -mattr=+rdrand | FileCheck %s +declare {i16, i32} @llvm.x86.rdrand.16() +declare {i32, i32} @llvm.x86.rdrand.32() +declare {i64, i32} @llvm.x86.rdrand.64() + +define i32 @_rdrand16_step(i16* %random_val) { + %call = call {i16, i32} @llvm.x86.rdrand.16() + %randval = extractvalue {i16, i32} %call, 0 + store i16 %randval, i16* %random_val + %isvalid = extractvalue {i16, i32} %call, 1 + ret i32 %isvalid +; CHECK: _rdrand16_step: +; CHECK: rdrandw %ax +; CHECK: movw %ax, (%rdi) +; CHECK: movzwl %ax, %ecx +; CHECK: movl $1, %eax +; CHECK: cmovael %ecx, %eax +; CHECK: ret +} + +define i32 @_rdrand32_step(i32* %random_val) { + %call = call {i32, i32} @llvm.x86.rdrand.32() + %randval = extractvalue {i32, i32} %call, 0 + store i32 %randval, i32* %random_val + %isvalid = extractvalue {i32, i32} %call, 1 + ret i32 %isvalid +; CHECK: _rdrand32_step: +; CHECK: rdrandl %ecx +; CHECK: movl %ecx, (%rdi) +; CHECK: movl $1, %eax +; CHECK: cmovael %ecx, %eax +; CHECK: ret +} + +define i32 @_rdrand64_step(i64* %random_val) { + %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 +; CHECK: _rdrand64_step: +; CHECK: rdrandq %rcx +; CHECK: movq %rcx, (%rdi) +; CHECK: movl $1, %eax +; CHECK: cmovael %ecx, %eax +; CHECK: ret +} |