Changeset 7b2c2c5f for src/libcfa/concurrency/CtxSwitch-x86_64.S

Timestamp:

Mar 9, 2017, 3:49:30 PM (7 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

149d297

Parents:

5222605

Message:

Fixed saving and loading of control words for i386

File:

• src/libcfa/concurrency/CtxSwitch-x86_64.S (modified) (2 diffs)

src/libcfa/concurrency/CtxSwitch-x86_64.S

@@ -47 +47 @@
 CtxSwitch:
 
-        // Save volatile registers on the stack.
+        // Save floating & SSE control words on the stack.
 
         subq   $8,%rsp
         stmxcsr 0(%rsp)         // 4 bytes
         fnstcw  4(%rsp)         // 2 bytes
+
+        // Save volatile registers on the stack.
+
         pushq %r15
         pushq %r14
@@ -75 +78 @@
         popq %r14
         popq %r15
+
+        // Load floating & SSE control words from the stack.
+
         fldcw   4(%rsp)
         ldmxcsr 0(%rsp)
-        addq $8,%rsp
+        addq   $8,%rsp
 
         // Return to thread.