libgc/alpha_mach_dep.S

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