ceph/src/boost/tools/build/src/engine/boehm_gc/sparc_mach_dep.S

   1 !       SPARCompiler 3.0 and later apparently no longer handles
   2 !       asm outside functions.  So we need a separate .s file
   3 !       This is only set up for SunOS 5, not SunOS 4.
   4 !       Assumes this is called before the stack contents are
   5 !       examined.
   6
   7         .seg    "text"
   8         .globl  GC_save_regs_in_stack
   9         .globl  GC_push_regs
  10 GC_save_regs_in_stack:
  11 #if defined(__arch64__) || defined(__sparcv9)
  12         save    %sp,-128,%sp
  13         flushw
  14         ret
  15           restore %sp,2047+128,%o0
  16 #else /* 32 bit SPARC */
  17         ta      0x3   ! ST_FLUSH_WINDOWS
  18         mov     %sp,%o0
  19         retl
  20         nop
  21 #endif /* 32 bit SPARC */
  22 .GC_save_regs_in_stack_end:
  23         .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack
  24
  25
  26 ! GC_clear_stack_inner(arg, limit) clears stack area up to limit and
  27 ! returns arg.  Stack clearing is crucial on SPARC, so we supply
  28 ! an assembly version that s more careful.  Assumes limit is hotter
  29 ! than sp, and limit is 8 byte aligned.
  30         .globl  GC_clear_stack_inner
  31 GC_clear_stack_inner:
  32 #if defined(__arch64__) || defined(__sparcv9)
  33         mov %sp,%o2             ! Save sp
  34         add %sp,2047-8,%o3      ! p = sp+bias-8
  35         add %o1,-2047-192,%sp   ! Move sp out of the way,
  36                                 ! so that traps still work.
  37                                 ! Includes some extra words
  38                                 ! so we can be sloppy below.
  39 loop:
  40         stx %g0,[%o3]           ! *(long *)p = 0
  41         cmp %o3,%o1
  42         bgu,pt %xcc, loop       ! if (p > limit) goto loop
  43           add %o3,-8,%o3        ! p -= 8 (delay slot)
  44         retl
  45           mov %o2,%sp           ! Restore sp., delay slot
  46 #else  /* 32 bit SPARC */
  47         mov     %sp,%o2         ! Save sp
  48         add     %sp,-8,%o3      ! p = sp-8
  49         clr     %g1             ! [g0,g1] = 0
  50         add     %o1,-0x60,%sp   ! Move sp out of the way,
  51                                 ! so that traps still work.
  52                                 ! Includes some extra words
  53                                 ! so we can be sloppy below.
  54 loop:
  55         std     %g0,[%o3]       ! *(long long *)p = 0
  56         cmp     %o3,%o1
  57         bgu     loop            ! if (p > limit) goto loop
  58           add   %o3,-8,%o3      ! p -= 8 (delay slot)
  59         retl
  60           mov   %o2,%sp         ! Restore sp., delay slot
  61 #endif  /* 32 bit SPARC */
  62 .GC_clear_stack_inner_end:
  63         .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner
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