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3b0efb2f89
Lower SHL_PARTS, SRA_PARTS and SRL_PARTS to perform 128-bit integer shift Patch by GuanHong Liu. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204940 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.7 KiB
LLVM
44 lines
1.7 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
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define i128 @test_i128_lsl(i128 %a, i32 %shift) {
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; CHECK-LABEL: test_i128_lsl:
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%sh_prom = zext i32 %shift to i128
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%shl = shl i128 %a, %sh_prom
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; CHECK: movz [[SIXTYFOUR:x[0-9]+]], #64
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; CHECK-NEXT: sub [[REVSHAMT:x[0-9]+]], [[SIXTYFOUR]], [[SHAMT_32:w[0-9]+]], uxtw
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; CHECK-NEXT: lsr [[TMP1:x[0-9]+]], [[LO:x[0-9]+]], [[REVSHAMT]]
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; CHECK: lsl [[TMP2:x[0-9]+]], [[HI:x[0-9]+]], [[SHAMT:x[0-9]+]]
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; CHECK-NEXT: orr [[FALSEVAL:x[0-9]+]], [[TMP1]], [[TMP2]]
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; CHECK-NEXT: sub [[EXTRASHAMT:x[0-9]+]], [[SHAMT]], #64
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; CHECK-NEXT: lsl [[TMP3:x[0-9]+]], [[LO]], [[EXTRASHAMT]]
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; CHECK-NEXT: cmp [[EXTRASHAMT]], #0
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; CHECK-NEXT: csel [[RESULTHI:x[0-9]+]], [[TMP3]], [[FALSEVAL]], ge
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; CHECK-NEXT: lsl [[TMP4:x[0-9]+]], [[LO]], [[SHAMT]]
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; CHECK-NEXT: csel [[RESULTLO:x[0-9]+]], xzr, [[TMP4]], ge
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ret i128 %shl
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}
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define i128 @test_i128_shr(i128 %a, i32 %shift) {
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; CHECK-LABEL: test_i128_shr:
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%sh_prom = zext i32 %shift to i128
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%shr = lshr i128 %a, %sh_prom
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; CHECK: movz [[SIXTYFOUR]], #64
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; CHECK-NEXT: sub [[REVSHAMT:x[0-9]+]], [[SIXTYFOUR]], [[SHAMT_32:w[0-9]+]], uxtw
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; CHECK-NEXT: lsl [[TMP2:x[0-9]+]], [[HI:x[0-9]+]], [[REVSHAMT]]
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; CHECK: lsr [[TMP1:x[0-9]+]], [[LO:x[0-9]+]], [[SHAMT:x[0-9]+]]
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; CHECK-NEXT: orr [[FALSEVAL:x[0-9]+]], [[TMP1]], [[TMP2]]
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; CHECK-NEXT: sub [[EXTRASHAMT:x[0-9]+]], [[SHAMT]], #64
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; CHECK-NEXT: lsr [[TRUEVAL:x[0-9]+]], [[HI]], [[EXTRASHAMT]]
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; CHECK-NEXT: cmp [[EXTRASHAMT]], #0
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; CHECK-NEXT: csel [[RESULTLO:x[0-9]+]], [[TRUEVAL]], [[FALSEVAL]], ge
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; CHECK-NEXT: lsr [[TMP3:x[0-9]+]], [[HI]], [[SHAMT]]
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; CHECK-NEXT: csel [[RESULTHI:x[0-9]+]], xzr, [[TMP3]], ge
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ret i128 %shr
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}
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