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Diff for /src/sys/i386/i386/Attic/swtch.s between versions 1.31 and 1.32

version 1.31, 2004/03/28 08:03:05 version 1.32, 2004/04/29 17:24:58
Line 136  ENTRY(cpu_heavy_switch) Line 136  ENTRY(cpu_heavy_switch)
         movl    %eax,PCB_DR0(%edx)          movl    %eax,PCB_DR0(%edx)
 1:  1:
     
   #if NNPX > 0
         /*          /*
          * Save the FP state if we have used the FP.  Note that calling           * Save the FP state if we have used the FP.  Note that calling
          * npxsave will NULL out PCPU(npxthread).           * npxsave will NULL out PCPU(npxthread).
          */           */
 #if NNPX > 0  
         cmpl    %ebx,PCPU(npxthread)          cmpl    %ebx,PCPU(npxthread)
         jne     1f          jne     1f
         addl    $PCB_SAVEFPU,%edx          addl    $PCB_SAVEFPU,%edx
Line 531  ENTRY(cpu_kthread_restore) Line 531  ENTRY(cpu_kthread_restore)
  *      YYY BGL, SPL   *      YYY BGL, SPL
  */   */
 ENTRY(cpu_lwkt_switch)  ENTRY(cpu_lwkt_switch)
         movl    4(%esp),%eax  
         pushl   %ebp    /* note: GDB hacked to locate ebp relative to td_sp */          pushl   %ebp    /* note: GDB hacked to locate ebp relative to td_sp */
         pushl   %ebx          pushl   %ebx
           movl    PCPU(curthread),%ebx
         pushl   %esi          pushl   %esi
         pushl   %edi          pushl   %edi
         pushfl          pushfl
         movl    PCPU(curthread),%ebx          /* warning: adjust movl into %eax below if you change the pushes */
   
   #if NNPX > 0
           /*
            * Save the FP state if we have used the FP.  Note that calling
            * npxsave will NULL out PCPU(npxthread).
            *
            * We have to deal with the FP state for LWKT threads in case they
            * happen to get preempted or block while doing an optimized
            * bzero/bcopy/memcpy.
            */
           cmpl    %ebx,PCPU(npxthread)
           jne     1f
           movl    TD_PCB(%ebx),%edx               /* EDX = PCB */
           addl    $PCB_SAVEFPU,%edx
           pushl   %edx
           call    npxsave                 /* do it in a big C function */
           addl    $4,%esp                 /* EAX, ECX, EDX trashed */
   1:
   #endif  /* NNPX > 0 */
   
           movl    4+20(%esp),%eax         /* switch to this thread */
         pushl   $cpu_lwkt_restore          pushl   $cpu_lwkt_restore
         movl    %esp,TD_SP(%ebx)          movl    %esp,TD_SP(%ebx)
         movl    %eax,PCPU(curthread)          movl    %eax,PCPU(curthread)
Removed from v.1.31  
changed lines
  Added in v.1.32