| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package ssa |
| |
| import "testing" |
| |
| // We generate memmove for copy(x[1:], x[:]), however we may change it to OpMove, |
| // because size is known. Check that OpMove is alias-safe, or we did call memmove. |
| func TestMove(t *testing.T) { |
| x := [...]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40} |
| copy(x[1:], x[:]) |
| for i := 1; i < len(x); i++ { |
| if int(x[i]) != i { |
| t.Errorf("Memmove got converted to OpMove in alias-unsafe way. Got %d instead of %d in position %d", int(x[i]), i, i+1) |
| } |
| } |
| } |
| |
| func TestMoveSmall(t *testing.T) { |
| x := [...]byte{1, 2, 3, 4, 5, 6, 7} |
| copy(x[1:], x[:]) |
| for i := 1; i < len(x); i++ { |
| if int(x[i]) != i { |
| t.Errorf("Memmove got converted to OpMove in alias-unsafe way. Got %d instead of %d in position %d", int(x[i]), i, i+1) |
| } |
| } |
| } |
| |
| func TestSubFlags(t *testing.T) { |
| if !subFlags32(0, 1).lt() { |
| t.Errorf("subFlags32(0,1).lt() returned false") |
| } |
| if !subFlags32(0, 1).ult() { |
| t.Errorf("subFlags32(0,1).ult() returned false") |
| } |
| } |
| |
| func TestIsPPC64WordRotateMask(t *testing.T) { |
| tests := []struct { |
| input int64 |
| expected bool |
| }{ |
| {0x00000001, true}, |
| {0x80000001, true}, |
| {0x80010001, false}, |
| {0xFFFFFFFA, false}, |
| {0xF0F0F0F0, false}, |
| {0xFFFFFFFD, true}, |
| {0x80000000, true}, |
| {0x00000000, false}, |
| {0xFFFFFFFF, true}, |
| {0x0000FFFF, true}, |
| {0xFF0000FF, true}, |
| {0x00FFFF00, true}, |
| } |
| |
| for _, v := range tests { |
| if v.expected != isPPC64WordRotateMask(v.input) { |
| t.Errorf("isPPC64WordRotateMask(0x%x) failed", v.input) |
| } |
| } |
| } |
| |
| func TestEncodeDecodePPC64WordRotateMask(t *testing.T) { |
| tests := []struct { |
| rotate int64 |
| mask uint64 |
| nbits, |
| mb, |
| me, |
| encoded int64 |
| }{ |
| {1, 0x00000001, 32, 31, 31, 0x20011f20}, |
| {2, 0x80000001, 32, 31, 0, 0x20021f01}, |
| {3, 0xFFFFFFFD, 32, 31, 29, 0x20031f1e}, |
| {4, 0x80000000, 32, 0, 0, 0x20040001}, |
| {5, 0xFFFFFFFF, 32, 0, 31, 0x20050020}, |
| {6, 0x0000FFFF, 32, 16, 31, 0x20061020}, |
| {7, 0xFF0000FF, 32, 24, 7, 0x20071808}, |
| {8, 0x00FFFF00, 32, 8, 23, 0x20080818}, |
| |
| {9, 0x0000000000FFFF00, 64, 40, 55, 0x40092838}, |
| {10, 0xFFFF000000000000, 64, 0, 15, 0x400A0010}, |
| {10, 0xFFFF000000000001, 64, 63, 15, 0x400A3f10}, |
| } |
| |
| for i, v := range tests { |
| result := encodePPC64RotateMask(v.rotate, int64(v.mask), v.nbits) |
| if result != v.encoded { |
| t.Errorf("encodePPC64RotateMask(%d,0x%x,%d) = 0x%x, expected 0x%x", v.rotate, v.mask, v.nbits, result, v.encoded) |
| } |
| rotate, mb, me, mask := DecodePPC64RotateMask(result) |
| if rotate != v.rotate || mb != v.mb || me != v.me || mask != v.mask { |
| t.Errorf("DecodePPC64Failure(Test %d) got (%d, %d, %d, %x) expected (%d, %d, %d, %x)", i, rotate, mb, me, mask, v.rotate, v.mb, v.me, v.mask) |
| } |
| } |
| } |
| |
| func TestMergePPC64ClrlsldiSrw(t *testing.T) { |
| tests := []struct { |
| clrlsldi int32 |
| srw int64 |
| valid bool |
| rotate int64 |
| mask uint64 |
| }{ |
| // ((x>>4)&0xFF)<<4 |
| {newPPC64ShiftAuxInt(4, 56, 63, 64), 4, true, 0, 0xFF0}, |
| // ((x>>4)&0xFFFF)<<4 |
| {newPPC64ShiftAuxInt(4, 48, 63, 64), 4, true, 0, 0xFFFF0}, |
| // ((x>>4)&0xFFFF)<<17 |
| {newPPC64ShiftAuxInt(17, 48, 63, 64), 4, false, 0, 0}, |
| // ((x>>4)&0xFFFF)<<16 |
| {newPPC64ShiftAuxInt(16, 48, 63, 64), 4, true, 12, 0xFFFF0000}, |
| // ((x>>32)&0xFFFF)<<17 |
| {newPPC64ShiftAuxInt(17, 48, 63, 64), 32, false, 0, 0}, |
| } |
| for i, v := range tests { |
| result := mergePPC64ClrlsldiSrw(int64(v.clrlsldi), v.srw) |
| if v.valid && result == 0 { |
| t.Errorf("mergePPC64ClrlsldiSrw(Test %d) did not merge", i) |
| } else if !v.valid && result != 0 { |
| t.Errorf("mergePPC64ClrlsldiSrw(Test %d) should return 0", i) |
| } else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m { |
| t.Errorf("mergePPC64ClrlsldiSrw(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask) |
| } |
| } |
| } |
| |
| func TestMergePPC64ClrlsldiRlwinm(t *testing.T) { |
| tests := []struct { |
| clrlsldi int32 |
| rlwinm int64 |
| valid bool |
| rotate int64 |
| mask uint64 |
| }{ |
| // ((x<<4)&0xFF00)<<4 |
| {newPPC64ShiftAuxInt(4, 56, 63, 64), encodePPC64RotateMask(4, 0xFF00, 32), false, 0, 0}, |
| // ((x>>4)&0xFF)<<4 |
| {newPPC64ShiftAuxInt(4, 56, 63, 64), encodePPC64RotateMask(28, 0x0FFFFFFF, 32), true, 0, 0xFF0}, |
| // ((x>>4)&0xFFFF)<<4 |
| {newPPC64ShiftAuxInt(4, 48, 63, 64), encodePPC64RotateMask(28, 0xFFFF, 32), true, 0, 0xFFFF0}, |
| // ((x>>4)&0xFFFF)<<17 |
| {newPPC64ShiftAuxInt(17, 48, 63, 64), encodePPC64RotateMask(28, 0xFFFF, 32), false, 0, 0}, |
| // ((x>>4)&0xFFFF)<<16 |
| {newPPC64ShiftAuxInt(16, 48, 63, 64), encodePPC64RotateMask(28, 0xFFFF, 32), true, 12, 0xFFFF0000}, |
| // ((x>>4)&0xF000FFFF)<<16 |
| {newPPC64ShiftAuxInt(16, 48, 63, 64), encodePPC64RotateMask(28, 0xF000FFFF, 32), true, 12, 0xFFFF0000}, |
| } |
| for i, v := range tests { |
| result := mergePPC64ClrlsldiRlwinm(v.clrlsldi, v.rlwinm) |
| if v.valid && result == 0 { |
| t.Errorf("mergePPC64ClrlsldiRlwinm(Test %d) did not merge", i) |
| } else if !v.valid && result != 0 { |
| t.Errorf("mergePPC64ClrlsldiRlwinm(Test %d) should return 0", i) |
| } else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m { |
| t.Errorf("mergePPC64ClrlsldiRlwinm(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask) |
| } |
| } |
| } |
| |
| func TestMergePPC64SldiSrw(t *testing.T) { |
| tests := []struct { |
| sld int64 |
| srw int64 |
| valid bool |
| rotate int64 |
| mask uint64 |
| }{ |
| {4, 4, true, 0, 0xFFFFFFF0}, |
| {4, 8, true, 28, 0x0FFFFFF0}, |
| {0, 0, true, 0, 0xFFFFFFFF}, |
| {8, 4, false, 0, 0}, |
| {0, 32, false, 0, 0}, |
| {0, 31, true, 1, 0x1}, |
| {31, 31, true, 0, 0x80000000}, |
| {32, 32, false, 0, 0}, |
| } |
| for i, v := range tests { |
| result := mergePPC64SldiSrw(v.sld, v.srw) |
| if v.valid && result == 0 { |
| t.Errorf("mergePPC64SldiSrw(Test %d) did not merge", i) |
| } else if !v.valid && result != 0 { |
| t.Errorf("mergePPC64SldiSrw(Test %d) should return 0", i) |
| } else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m { |
| t.Errorf("mergePPC64SldiSrw(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask) |
| } |
| } |
| } |
| |
| func TestMergePPC64AndSrwi(t *testing.T) { |
| tests := []struct { |
| and int64 |
| srw int64 |
| valid bool |
| rotate int64 |
| mask uint64 |
| }{ |
| {0x000000FF, 8, true, 24, 0xFF}, |
| {0xF00000FF, 8, true, 24, 0xFF}, |
| {0x0F0000FF, 4, false, 0, 0}, |
| {0x00000000, 4, false, 0, 0}, |
| {0xF0000000, 4, false, 0, 0}, |
| {0xF0000000, 32, false, 0, 0}, |
| {0xFFFFFFFF, 0, true, 0, 0xFFFFFFFF}, |
| } |
| for i, v := range tests { |
| result := mergePPC64AndSrwi(v.and, v.srw) |
| if v.valid && result == 0 { |
| t.Errorf("mergePPC64AndSrwi(Test %d) did not merge", i) |
| } else if !v.valid && result != 0 { |
| t.Errorf("mergePPC64AndSrwi(Test %d) should return 0", i) |
| } else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m { |
| t.Errorf("mergePPC64AndSrwi(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask) |
| } |
| } |
| } |
