derek.holloway
7502bf64a4
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117 lines
2.8 KiB
LLVM
117 lines
2.8 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr9 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
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; RUN: FileCheck %s
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; These tests show that for 32-bit and 64-bit scalars, combining a shift to
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; a single multiply-high is only valid when the shift amount is the same as
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; the width of the narrow type.
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; That is, combining a shift to mulh is only valid for 32-bit when the shift
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; amount is 32.
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; Likewise, combining a shift to mulh is only valid for 64-bit when the shift
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; amount is 64.
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define i32 @test_mulhw(i32 %a, i32 %b) {
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; CHECK-LABEL: test_mulhw:
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; CHECK: mulld
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; CHECK-NOT: mulhw
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; CHECK: blr
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%1 = sext i32 %a to i64
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%2 = sext i32 %b to i64
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%mul = mul i64 %1, %2
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%shr = lshr i64 %mul, 33
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%tr = trunc i64 %shr to i32
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ret i32 %tr
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}
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define i32 @test_mulhu(i32 %a, i32 %b) {
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; CHECK-LABEL: test_mulhu:
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; CHECK: mulld
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; CHECK-NOT: mulhwu
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; CHECK: blr
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%1 = zext i32 %a to i64
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%2 = zext i32 %b to i64
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%mul = mul i64 %1, %2
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%shr = lshr i64 %mul, 33
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%tr = trunc i64 %shr to i32
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ret i32 %tr
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}
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define i64 @test_mulhd(i64 %a, i64 %b) {
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; CHECK-LABEL: test_mulhd:
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; CHECK: mulhd
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; CHECK: mulld
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; CHECK: blr
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%1 = sext i64 %a to i128
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%2 = sext i64 %b to i128
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%mul = mul i128 %1, %2
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%shr = lshr i128 %mul, 63
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%tr = trunc i128 %shr to i64
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ret i64 %tr
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}
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define i64 @test_mulhdu(i64 %a, i64 %b) {
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; CHECK-LABEL: test_mulhdu:
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; CHECK: mulhdu
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; CHECK: mulld
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; CHECK: blr
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%1 = zext i64 %a to i128
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%2 = zext i64 %b to i128
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%mul = mul i128 %1, %2
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%shr = lshr i128 %mul, 63
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%tr = trunc i128 %shr to i64
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ret i64 %tr
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}
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define signext i32 @test_mulhw_signext(i32 %a, i32 %b) {
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; CHECK-LABEL: test_mulhw_signext:
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; CHECK: mulld
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; CHECK-NOT: mulhw
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; CHECK: blr
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%1 = sext i32 %a to i64
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%2 = sext i32 %b to i64
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%mul = mul i64 %1, %2
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%shr = lshr i64 %mul, 33
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%tr = trunc i64 %shr to i32
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ret i32 %tr
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}
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define zeroext i32 @test_mulhu_zeroext(i32 %a, i32 %b) {
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; CHECK-LABEL: test_mulhu_zeroext:
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; CHECK: mulld
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; CHECK-NOT: mulhwu
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; CHECK: blr
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%1 = zext i32 %a to i64
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%2 = zext i32 %b to i64
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%mul = mul i64 %1, %2
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%shr = lshr i64 %mul, 33
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%tr = trunc i64 %shr to i32
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ret i32 %tr
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}
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define signext i64 @test_mulhd_signext(i64 %a, i64 %b) {
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; CHECK-LABEL: test_mulhd_signext:
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; CHECK: mulhd
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; CHECK: mulld
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; CHECK: blr
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%1 = sext i64 %a to i128
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%2 = sext i64 %b to i128
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%mul = mul i128 %1, %2
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%shr = lshr i128 %mul, 63
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%tr = trunc i128 %shr to i64
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ret i64 %tr
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}
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define zeroext i64 @test_mulhdu_zeroext(i64 %a, i64 %b) {
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; CHECK-LABEL: test_mulhdu_zeroext:
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; CHECK: mulhdu
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; CHECK: mulld
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; CHECK: blr
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%1 = zext i64 %a to i128
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%2 = zext i64 %b to i128
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%mul = mul i128 %1, %2
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%shr = lshr i128 %mul, 63
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%tr = trunc i128 %shr to i64
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ret i64 %tr
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}
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