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# $Id: alpha_mach_dep.s,v 1.2 1993/01/18 22:54:51 dosser 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
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