From: Konstantin Baladurin <k.baladurin@partner.samsung.com>
Date: Sat, 28 Apr 2018 12:22:38 +0000 (+0300)
Subject: [Linux/x86] Fix 64 bit shift inconsistencies (dotnet/coreclr#17826)
X-Git-Tag: submit/tizen/20210909.063632~11030^2~4923
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=23b742e122445fbabc0a623098226d03a380010f;p=platform%2Fupstream%2Fdotnet%2Fruntime.git

[Linux/x86] Fix 64 bit shift inconsistencies (dotnet/coreclr#17826)

Apply dotnet/coreclr#15443 and dotnet/coreclr#15949 for Linux/x86

Commit migrated from https://github.com/dotnet/coreclr/commit/45544e0970df4ea4f6db20fd4a5b673ddb763ebb
---

diff --git a/src/coreclr/src/vm/i386/jithelp.S b/src/coreclr/src/vm/i386/jithelp.S
index dd3f804..f74039e 100644
--- a/src/coreclr/src/vm/i386/jithelp.S
+++ b/src/coreclr/src/vm/i386/jithelp.S
@@ -441,6 +441,9 @@ LEAF_END JIT_PollGC_Nop, _TEXT
 //
 .align 16
 LEAF_ENTRY JIT_LLsh, _TEXT
+    // Reduce shift amount mod 64
+    and     ecx, 63
+
     cmp     ecx, 32
     jae     LOCAL_LABEL(LLshMORE32)
 
@@ -476,6 +479,9 @@ LEAF_END JIT_LLsh, _TEXT
 //
 .align 16
 LEAF_ENTRY JIT_LRsh, _TEXT
+    // Reduce shift amount mod 64
+    and     ecx, 63
+
     cmp     ecx, 32
     jae     LOCAL_LABEL(LRshMORE32)
 
@@ -510,6 +516,9 @@ LEAF_END JIT_LRsh, _TEXT
 //
 .align 16
 LEAF_ENTRY JIT_LRsz, _TEXT
+    // Reduce shift amount mod 64
+    and     ecx, 63
+
     cmp     ecx, 32
     jae     LOCAL_LABEL(LRszMORE32)