Zebediah Figura : ntdll: Correctly handle shift greater than the type width in 64-bit shift functions.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bc270a54323c04647f40a2820c10f8eec2e49d15
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=bc270a54323c04647f40a2820...

Author: Zebediah Figura 
Date:   Sun Jul  3 20:27:12 2022 -0500

ntdll: Correctly handle shift greater than the type width in 64-bit shift functions.

Based on a patch by Zhao Yi.

---

dlls/ntdll/large_int.c       | 15 ++++++++++++---
 dlls/ntdll/tests/large_int.c | 10 +++++-----
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/dlls/ntdll/large_int.c b/dlls/ntdll/large_int.c
index 038a552545f..0973888d654 100644
--- a/dlls/ntdll/large_int.c
+++ b/dlls/ntdll/large_int.c
@@ -817,7 +817,10 @@ LONGLONG __stdcall __regs__allshl( LONGLONG a, unsigned char b )

if (b >= 32)
     {
-        ret.HighPart = x.LowPart << (b & 31);
+        if (b >= 64)
+            ret.HighPart = 0;
+        else
+            ret.HighPart = x.LowPart << (b & 31);
         ret.LowPart = 0;
     }
     else
@@ -847,7 +850,10 @@ LONGLONG __stdcall __regs__allshr( LONGLONG a, unsigned char b )
     if (b >= 32)
     {
         ret.HighPart = x.HighPart >> 31;
-        ret.LowPart = x.HighPart >> (b & 31);
+        if (b >= 64)
+            ret.LowPart = x.HighPart >> 31;
+        else
+            ret.LowPart = x.HighPart >> (b & 31);
     }
     else
     {
@@ -876,7 +882,10 @@ ULONGLONG __stdcall __regs__aullshr( ULONGLONG a, unsigned char b )
     if (b >= 32)
     {
         ret.HighPart = 0;
-        ret.LowPart = x.HighPart >> (b & 31);
+        if (b >= 64)
+            ret.LowPart = 0;
+        else
+            ret.LowPart = x.HighPart >> (b & 31);
     }
     else
     {
diff --git a/dlls/ntdll/tests/large_int.c b/dlls/ntdll/tests/large_int.c
index d2c7d386f16..29b5795b31d 100644
--- a/dlls/ntdll/tests/large_int.c
+++ b/dlls/ntdll/tests/large_int.c
@@ -526,10 +526,10 @@ static void test_builtins(void)
     ok(l == 0xbcdef00000000000ll, "got %#I64x\n", l);

l = call_shift_func(p_allshl, 0x0123456789abcdefll, 88);
-    todo_wine ok(!l, "got %#I64x\n", l);
+    ok(!l, "got %#I64x\n", l);

l = call_shift_func(p_allshl, 0x0123456789abcdefll, 0x88);
-    todo_wine ok(!l, "got %#I64x\n", l);
+    ok(!l, "got %#I64x\n", l);

l = call_shift_func(p_allshl, 0x0123456789abcdefll, 0x108);
     ok(l == 0x23456789abcdef00ll, "got %#I64x\n", l);
@@ -541,7 +541,7 @@ static void test_builtins(void)
     ok(l == 0x01234ll, "got %#I64x\n", l);

l = call_shift_func(p_allshr, 0x0123456789abcdefll, 88);
-    todo_wine ok(!l, "got %#I64x\n", l);
+    ok(!l, "got %#I64x\n", l);

l = call_shift_func(p_allshr, 0x8123456789abcdefll, 12);
     ok(l == 0xfff8123456789abcll, "got %#I64x\n", l);
@@ -550,7 +550,7 @@ static void test_builtins(void)
     ok(l == 0xfffffffffff81234ll, "got %#I64x\n", l);

l = call_shift_func(p_allshr, 0x8123456789abcdefll, 88);
-    todo_wine ok(l == -1ll, "got %#I64x\n", l);
+    ok(l == -1ll, "got %#I64x\n", l);

l = call_shift_func(p_allshr, 0x8123456789abcdefll, 0x108);
     ok(l == 0xff8123456789abcdll, "got %#I64x\n", l);
@@ -562,7 +562,7 @@ static void test_builtins(void)
     ok(l == 0x81234ll, "got %#I64x\n", l);

l = call_shift_func(p_aullshr, 0x8123456789abcdefll, 88);
-    todo_wine ok(!l, "got %#I64x\n", l);
+    ok(!l, "got %#I64x\n", l);

l = call_shift_func(p_aullshr, 0x8123456789abcdefll, 0x108);
     ok(l == 0x8123456789abcdll, "got %#I64x\n", l);