X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-assem.S;h=4a5090ce9606c646d58564223dd016b09123da24;hb=b9519773faa7b3c98915eccb9cb1fd8a8270ee56;hp=1afa6eefd8c7cab751a1bb014c5ca78b65ba39b6;hpb=26e8f33d8639e4de75e59e3aa30bbd7478d51a69;p=sbcl.git

diff --git a/src/runtime/x86-assem.S b/src/runtime/x86-assem.S
index 1afa6ee..4a5090c 100644
--- a/src/runtime/x86-assem.S
+++ b/src/runtime/x86-assem.S
@@ -122,15 +122,12 @@ GNAME(call_into_c):
 	fstp	%st(0)
 	fstp	%st(0)
 
-	cld                       # clear out DF: Darwin, Solaris and Win32 at
-	                          # least need this, and it should not hurt others
-
 	call	*%eax		  # normal callout using Lisp stack
 	movl	%eax,%ecx	  # remember integer return value
 
 /* Check for a return FP value. */
 	fxam
-	fnstsw	%eax
+	fnstsw	%ax
 	andl	$0x4500,%eax
 	cmpl	$0x4100,%eax
 	jne	Lfp_rtn_value
@@ -188,10 +185,8 @@ GNAME(call_into_lisp_first_time):
 #ifndef LISP_FEATURE_WIN32
 	movl    %esp,ALIEN_STACK + SYMBOL_VALUE_OFFSET
 	movl    GNAME(all_threads),%eax
-	movl    THREAD_CONTROL_STACK_START_OFFSET(%eax) ,%esp
-	/* don't think too hard about what happens if we get interrupted
-	* here */
-	addl 	$(THREAD_CONTROL_STACK_SIZE),%esp
+	/* pthread machinery takes care of this for other threads */
+	movl    THREAD_CONTROL_STACK_END_OFFSET(%eax) ,%esp
 #else
 /* Win32 -really- doesn't like you switching stacks out from under it. */
 	movl	GNAME(all_threads),%eax
@@ -440,17 +435,15 @@ GNAME(do_pending_interrupt):
 #define ALLOC(size)                                             \
         pushl   %ebp;              /* Save EBP               */ \
         movl    %esp,%ebp;         /* Save ESP to EBP        */ \
-        andl    $0xfffffff0,%esp;  /* Align stack            */ \
-        pushl   $0;                /* Padding                */ \
-        pushl   size;              /* Argument to alloc      */ \
-        cld;                       /* Clear DF               */ \
+        pushl   $0;                /* Reserve space for arg  */ \
+        andl    $0xfffffff0,%esp;  /* Align stack to 16bytes */ \
+        movl    size, (%esp);      /* Argument to alloc      */ \
         call    GNAME(alloc);                                   \
         movl    %ebp,%esp;         /* Restore ESP from EBP   */ \
         popl    %ebp;              /* Restore EBP            */
 #else
 #define ALLOC(size)                                             \
         pushl   size;              /* Argument to alloc      */ \
-        cld;                       /* Clear DF               */ \
         call    GNAME(alloc);                                   \
         addl    $4,%esp;           /* Pop argument           */
 #endif
@@ -872,7 +865,6 @@ GNAME(fast_bzero_base):
         xor %eax, %eax            /* Zero EAX */
         shr $2, %ecx              /* Amount of 4-byte blocks to copy */
         jz  Lend_base
-        cld                       /* Set direction of STOSL to increment */
 
         rep
         stosl                     /* Store EAX to *EDI, ECX times, incrementing