diff options
Diffstat (limited to 'src/cmd/compile/internal/gc/testdata/arith.go')
| -rw-r--r-- | src/cmd/compile/internal/gc/testdata/arith.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/gc/testdata/arith.go b/src/cmd/compile/internal/gc/testdata/arith.go index d850ce27b2..f260d45775 100644 --- a/src/cmd/compile/internal/gc/testdata/arith.go +++ b/src/cmd/compile/internal/gc/testdata/arith.go @@ -488,6 +488,17 @@ func testLrot() { wantA, wantB, wantC, wantD, ", got", a, b, c, d) failed = true } + // Also test inputs with the top bit set, and make sure + // sub-word right shift has high bits cleared first. + // See issue #19270. + wantA, wantB, wantC, wantD = uint8(0xdf), uint16(0xdfff), + uint32(0xdfffffff), uint64(0xdfffffffffffffff) + a, b, c, d = lrot1_ssa(0xfe, 0xfffe, 0xfffffffe, 0xfffffffffffffffe) + if a != wantA || b != wantB || c != wantC || d != wantD { + println("lrot1_ssa(0xfe, 0xfffe, 0xfffffffe, 0xfffffffffffffffe)=", + wantA, wantB, wantC, wantD, ", got", a, b, c, d) + failed = true + } x := lrot2_ssa(0xb0000001, 32) wantX := uint32(0xb0000001) if x != wantX { |