boehm-gc/alpha_mach_dep.S

   1  # $Id: alpha_mach_dep.s,v 1.2 1993/01/18 22:54:51 dosser Exp $
   2         .arch ev6
   3
   4         .text
   5         .align  4
   6         .globl  GC_push_regs
   7         .ent    GC_push_regs 2
   8 GC_push_regs:
   9         ldgp    $gp, 0($27)
  10         lda     $sp, -16($sp)
  11         stq     $26, 0($sp)
  12         .mask   0x04000000, 0
  13         .frame  $sp, 16, $26, 0
  14
  15  # $0           integer result
  16  # $1-$8        temp regs - not preserved cross calls
  17  # $9-$15       call saved regs
  18  # $16-$21      argument regs - not preserved cross calls
  19  # $22-$28      temp regs - not preserved cross calls
  20  # $29          global pointer - not preserved cross calls
  21  # $30          stack pointer
  22
  23 # define call_push(x)                   \
  24         mov   x, $16;                   \
  25         jsr   $26, GC_push_one;         \
  26         ldgp  $gp, 0($26)
  27
  28         call_push($9)
  29         call_push($10)
  30         call_push($11)
  31         call_push($12)
  32         call_push($13)
  33         call_push($14)
  34         call_push($15)
  35
  36  # $f0-$f1      floating point results
  37  # $f2-$f9      call saved regs
  38  # $f10-$f30    temp regs - not preserved cross calls
  39
  40         # Use the most efficient transfer method for this hardware.
  41         # Bit 1 detects the FIX extension, which includes ftoit.
  42         amask   2, $0
  43         bne     $0, $use_stack
  44
  45 #undef call_push
  46 #define call_push(x)                    \
  47         ftoit   x, $16;                 \
  48         jsr     $26, GC_push_one;       \
  49         ldgp    $gp, 0($26)
  50
  51         call_push($f2)
  52         call_push($f3)
  53         call_push($f4)
  54         call_push($f5)
  55         call_push($f6)
  56         call_push($f7)
  57         call_push($f8)
  58         call_push($f9)
  59
  60         ldq     $26, 0($sp)
  61         lda     $sp, 16($sp)
  62         ret     $31, ($26), 1
  63
  64         .align  4
  65 $use_stack:
  66
  67 #undef call_push
  68 #define call_push(x)                    \
  69         stt     x, 8($sp);              \
  70         ldq     $16, 8($sp);            \
  71         jsr     $26, GC_push_one;       \
  72         ldgp    $gp, 0($26)
  73
  74         call_push($f2)
  75         call_push($f3)
  76         call_push($f4)
  77         call_push($f5)
  78         call_push($f6)
  79         call_push($f7)
  80         call_push($f8)
  81         call_push($f9)
  82
  83         ldq     $26, 0($sp)
  84         lda     $sp, 16($sp)
  85         ret     $31, ($26), 1
  86
  87         .end    GC_push_regs