Changeset 933f32f for libcfa/src/concurrency/CtxSwitch-i386.S

Timestamp:

May 24, 2019, 10:19:41 AM (6 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, arm-eh, ast-experimental, cleanup-dtors, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

d908563

Parents:

6a9d4b4 (diff), 292642a (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge branch 'master' into cleanup-dtors

File:

• libcfa/src/concurrency/CtxSwitch-i386.S (modified) (5 diffs)

libcfa/src/concurrency/CtxSwitch-i386.S

@@ -41 +41 @@
 #define PC_OFFSET       ( 2 * PTR_BYTE )
 
-.text
+        .text
         .align 2
-.globl  CtxSwitch
+        .globl CtxSwitch
+        .type  CtxSwitch, @function
 CtxSwitch:
 
@@ -50 +51 @@
 
         movl 4(%esp),%eax
-
-        // Save floating & SSE control words on the stack.
-
-        sub    $8,%esp
-        stmxcsr 0(%esp)         // 4 bytes
-        fnstcw  4(%esp)         // 2 bytes
 
         // Save volatile registers on the stack.
@@ -67 +62 @@
         movl %esp,SP_OFFSET(%eax)
         movl %ebp,FP_OFFSET(%eax)
-//      movl 4(%ebp),%ebx       // save previous eip for debugger
-//      movl %ebx,PC_OFFSET(%eax)
 
         // Copy the "to" context argument from the stack to register eax
@@ -74 +67 @@
         // argument is now at 8 + 12 = 20(%esp)
 
-        movl 28(%esp),%eax
+        movl 20(%esp),%eax
 
         // Load new context from the "to" area.
@@ -87 +80 @@
         popl %ebx
 
-        // Load floating & SSE control words from the stack.
-
-        fldcw   4(%esp)
-        ldmxcsr 0(%esp)
-        add    $8,%esp
-
         // Return to thread.
 
         ret
+        .size  CtxSwitch, .-CtxSwitch
 
 // Local Variables: //