48 lines
1.5 KiB
LLVM
48 lines
1.5 KiB
LLVM
; RUN: llc -mtriple=arm64-apple-ios7.0 -mcpu=cyclone %s -o - | FileCheck %s
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; RUN: llc -mtriple=aarch64_be-linux-gnu -mcpu=cyclone %s -o - | FileCheck --check-prefix=CHECK-BE %s
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define i128 @test_128bitmul(i128 %lhs, i128 %rhs) {
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; CHECK-LABEL: test_128bitmul:
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; CHECK-DAG: mul [[PART1:x[0-9]+]], x0, x3
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; CHECK-DAG: umulh [[CARRY:x[0-9]+]], x0, x2
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; CHECK: mul [[PART2:x[0-9]+]], x1, x2
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; CHECK: mul x0, x0, x2
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; CHECK-BE-LABEL: test_128bitmul:
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; CHECK-BE-DAG: mul [[PART1:x[0-9]+]], x1, x2
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; CHECK-BE-DAG: umulh [[CARRY:x[0-9]+]], x1, x3
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; CHECK-BE: mul [[PART2:x[0-9]+]], x0, x3
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; CHECK-BE: mul x1, x1, x3
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%prod = mul i128 %lhs, %rhs
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ret i128 %prod
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}
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; The machine combiner should create madd instructions when
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; optimizing for size because that's smaller than mul + add.
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define i128 @test_128bitmul_optsize(i128 %lhs, i128 %rhs) optsize {
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; CHECK-LABEL: test_128bitmul_optsize:
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; CHECK: umulh [[HI:x[0-9]+]], x0, x2
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; CHECK-NEXT: madd [[TEMP1:x[0-9]+]], x0, x3, [[HI]]
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; CHECK-NEXT: madd x1, x1, x2, [[TEMP1]]
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; CHECK-NEXT: mul x0, x0, x2
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; CHECK-NEXT: ret
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%prod = mul i128 %lhs, %rhs
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ret i128 %prod
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}
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define i128 @test_128bitmul_minsize(i128 %lhs, i128 %rhs) minsize {
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; CHECK-LABEL: test_128bitmul_minsize:
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; CHECK: umulh [[HI:x[0-9]+]], x0, x2
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; CHECK-NEXT: madd [[TEMP1:x[0-9]+]], x0, x3, [[HI]]
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; CHECK-NEXT: madd x1, x1, x2, [[TEMP1]]
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; CHECK-NEXT: mul x0, x0, x2
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; CHECK-NEXT: ret
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%prod = mul i128 %lhs, %rhs
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ret i128 %prod
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}
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