2012-07-12 09:36:29 +00:00
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; RUN: llc < %s -march=x86-64 -mattr=+rdrand | FileCheck %s
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2012-07-12 09:31:43 +00:00
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declare {i16, i32} @llvm.x86.rdrand.16()
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declare {i32, i32} @llvm.x86.rdrand.32()
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declare {i64, i32} @llvm.x86.rdrand.64()
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define i32 @_rdrand16_step(i16* %random_val) {
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%call = call {i16, i32} @llvm.x86.rdrand.16()
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%randval = extractvalue {i16, i32} %call, 0
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store i16 %randval, i16* %random_val
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%isvalid = extractvalue {i16, i32} %call, 1
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ret i32 %isvalid
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; CHECK: _rdrand16_step:
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; CHECK: rdrandw %ax
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; CHECK: movw %ax, (%rdi)
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; CHECK: movzwl %ax, %ecx
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; CHECK: movl $1, %eax
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; CHECK: cmovael %ecx, %eax
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; CHECK: ret
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}
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define i32 @_rdrand32_step(i32* %random_val) {
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%call = call {i32, i32} @llvm.x86.rdrand.32()
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%randval = extractvalue {i32, i32} %call, 0
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store i32 %randval, i32* %random_val
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%isvalid = extractvalue {i32, i32} %call, 1
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ret i32 %isvalid
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; CHECK: _rdrand32_step:
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; CHECK: rdrandl %ecx
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; CHECK: movl %ecx, (%rdi)
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; CHECK: movl $1, %eax
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; CHECK: cmovael %ecx, %eax
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; CHECK: ret
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}
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define i32 @_rdrand64_step(i64* %random_val) {
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%call = call {i64, i32} @llvm.x86.rdrand.64()
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%randval = extractvalue {i64, i32} %call, 0
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store i64 %randval, i64* %random_val
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%isvalid = extractvalue {i64, i32} %call, 1
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ret i32 %isvalid
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; CHECK: _rdrand64_step:
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; CHECK: rdrandq %rcx
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; CHECK: movq %rcx, (%rdi)
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; CHECK: movl $1, %eax
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; CHECK: cmovael %ecx, %eax
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; CHECK: ret
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}
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