boehm-gc/alpha_mach_dep.s

   1
   2 # define call_push(x)                                                   \
   3         lda   $16, 0(x);        /* copy x to first argument register */ \
   4         jsr   $26, GC_push_one; /* call GC_push_one, ret addr in $26 */ \
   5         ldgp  $gp, 0($26)       /* restore $gp register from $ra */
   6
   7         .text
   8         .align  4
   9         .globl  GC_push_regs
  10         .ent    GC_push_regs 2
  11 GC_push_regs:
  12         ldgp    $gp, 0($27)             # set gp from the procedure value reg
  13         lda     $sp, -32($sp)           # make stack frame
  14         stq     $26, 8($sp)             # save return address
  15         .mask   0x04000000, -8
  16         .frame  $sp, 16, $26, 0
  17
  18  #      call_push($0)    # expression eval and int func result
  19
  20  #      call_push($1)    # temp regs - not preserved cross calls
  21  #      call_push($2)
  22  #      call_push($3)
  23  #      call_push($4)
  24  #      call_push($5)
  25  #      call_push($6)
  26  #      call_push($7)
  27  #      call_push($8)
  28
  29         call_push($9)    # Saved regs
  30         call_push($10)
  31         call_push($11)
  32         call_push($12)
  33         call_push($13)
  34         call_push($14)
  35
  36         call_push($15)   # frame ptr or saved reg
  37
  38  #      call_push($16)   # argument regs - not preserved cross calls
  39  #      call_push($17)
  40  #      call_push($18)
  41  #      call_push($19)
  42  #      call_push($20)
  43  #      call_push($21)
  44
  45  #      call_push($22)   # temp regs - not preserved cross calls
  46  #      call_push($23)
  47  #      call_push($24)
  48  #      call_push($25)
  49
  50  #      call_push($26)   # return address - expression eval
  51  #      call_push($27)   # procedure value or temporary reg
  52  #      call_push($28)   # assembler temp - not presrved
  53         call_push($29)   # Global Pointer
  54  #      call_push($30)   # Stack Pointer
  55
  56         ldq     $26, 8($sp)             # restore return address
  57         lda     $sp, 32($sp)            # pop stack frame
  58         ret     $31, ($26), 1           # return ($31 == hardwired zero)
  59         .end    GC_push_regs