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 # $Id: alpha_mach_dep.S,v 1.1.1.1 2007/08/18 13:59:11 jeunes2 Exp $
        .arch ev6

        .text
        .align  4
        .globl  GC_push_regs
        .ent    GC_push_regs 2
GC_push_regs:
        ldgp    $gp, 0($27)
        lda     $sp, -16($sp)
        stq     $26, 0($sp)
        .mask   0x04000000, 0
        .frame  $sp, 16, $26, 0

 # $0           integer result
 # $1-$8        temp regs - not preserved cross calls
 # $9-$15       call saved regs
 # $16-$21      argument regs - not preserved cross calls
 # $22-$28      temp regs - not preserved cross calls
 # $29          global pointer - not preserved cross calls
 # $30          stack pointer

# define call_push(x)                   \
        mov   x, $16;                   \
        jsr   $26, GC_push_one;         \
        ldgp  $gp, 0($26)
        
        call_push($9)
        call_push($10)
        call_push($11)
        call_push($12)
        call_push($13)
        call_push($14)
        call_push($15)

 # $f0-$f1      floating point results
 # $f2-$f9      call saved regs
 # $f10-$f30    temp regs - not preserved cross calls

        # Use the most efficient transfer method for this hardware.
        # Bit 1 detects the FIX extension, which includes ftoit.
        amask   2, $0
        bne     $0, $use_stack

#undef call_push
#define call_push(x)                    \
        ftoit   x, $16;                 \
        jsr     $26, GC_push_one;       \
        ldgp    $gp, 0($26)

        call_push($f2)
        call_push($f3)
        call_push($f4)
        call_push($f5)
        call_push($f6)
        call_push($f7)
        call_push($f8)
        call_push($f9)

        ldq     $26, 0($sp)
        lda     $sp, 16($sp)
        ret     $31, ($26), 1

        .align  4
$use_stack:

#undef call_push
#define call_push(x)                    \
        stt     x, 8($sp);              \
        ldq     $16, 8($sp);            \
        jsr     $26, GC_push_one;       \
        ldgp    $gp, 0($26)

        call_push($f2)
        call_push($f3)
        call_push($f4)
        call_push($f5)
        call_push($f6)
        call_push($f7)
        call_push($f8)
        call_push($f9)

        ldq     $26, 0($sp)
        lda     $sp, 16($sp)
        ret     $31, ($26), 1

        .end    GC_push_regs