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/*
* Copyright 2015, Cyril Bur, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include "../basic_asm.h"
#define PUSH_FPU(pos) \
stfd f14,pos(sp); \
stfd f15,pos+8(sp); \
stfd f16,pos+16(sp); \
stfd f17,pos+24(sp); \
stfd f18,pos+32(sp); \
stfd f19,pos+40(sp); \
stfd f20,pos+48(sp); \
stfd f21,pos+56(sp); \
stfd f22,pos+64(sp); \
stfd f23,pos+72(sp); \
stfd f24,pos+80(sp); \
stfd f25,pos+88(sp); \
stfd f26,pos+96(sp); \
stfd f27,pos+104(sp); \
stfd f28,pos+112(sp); \
stfd f29,pos+120(sp); \
stfd f30,pos+128(sp); \
stfd f31,pos+136(sp);
#define POP_FPU(pos) \
lfd f14,pos(sp); \
lfd f15,pos+8(sp); \
lfd f16,pos+16(sp); \
lfd f17,pos+24(sp); \
lfd f18,pos+32(sp); \
lfd f19,pos+40(sp); \
lfd f20,pos+48(sp); \
lfd f21,pos+56(sp); \
lfd f22,pos+64(sp); \
lfd f23,pos+72(sp); \
lfd f24,pos+80(sp); \
lfd f25,pos+88(sp); \
lfd f26,pos+96(sp); \
lfd f27,pos+104(sp); \
lfd f28,pos+112(sp); \
lfd f29,pos+120(sp); \
lfd f30,pos+128(sp); \
lfd f31,pos+136(sp);
# Careful calling this, it will 'clobber' fpu (by design)
# Don't call this from C
FUNC_START(load_fpu)
lfd f14,0(r3)
lfd f15,8(r3)
lfd f16,16(r3)
lfd f17,24(r3)
lfd f18,32(r3)
lfd f19,40(r3)
lfd f20,48(r3)
lfd f21,56(r3)
lfd f22,64(r3)
lfd f23,72(r3)
lfd f24,80(r3)
lfd f25,88(r3)
lfd f26,96(r3)
lfd f27,104(r3)
lfd f28,112(r3)
lfd f29,120(r3)
lfd f30,128(r3)
lfd f31,136(r3)
blr
FUNC_END(load_fpu)
FUNC_START(check_fpu)
mr r4,r3
li r3,1 # assume a bad result
lfd f0,0(r4)
fcmpu cr1,f0,f14
bne cr1,1f
lfd f0,8(r4)
fcmpu cr1,f0,f15
bne cr1,1f
lfd f0,16(r4)
fcmpu cr1,f0,f16
bne cr1,1f
lfd f0,24(r4)
fcmpu cr1,f0,f17
bne cr1,1f
lfd f0,32(r4)
fcmpu cr1,f0,f18
bne cr1,1f
lfd f0,40(r4)
fcmpu cr1,f0,f19
bne cr1,1f
lfd f0,48(r4)
fcmpu cr1,f0,f20
bne cr1,1f
lfd f0,56(r4)
fcmpu cr1,f0,f21
bne cr1,1f
lfd f0,64(r4)
fcmpu cr1,f0,f22
bne cr1,1f
lfd f0,72(r4)
fcmpu cr1,f0,f23
bne cr1,1f
lfd f0,80(r4)
fcmpu cr1,f0,f24
bne cr1,1f
lfd f0,88(r4)
fcmpu cr1,f0,f25
bne cr1,1f
lfd f0,96(r4)
fcmpu cr1,f0,f26
bne cr1,1f
lfd f0,104(r4)
fcmpu cr1,f0,f27
bne cr1,1f
lfd f0,112(r4)
fcmpu cr1,f0,f28
bne cr1,1f
lfd f0,120(r4)
fcmpu cr1,f0,f29
bne cr1,1f
lfd f0,128(r4)
fcmpu cr1,f0,f30
bne cr1,1f
lfd f0,136(r4)
fcmpu cr1,f0,f31
bne cr1,1f
li r3,0 # Success!!!
1: blr
FUNC_START(test_fpu)
# r3 holds pointer to where to put the result of fork
# r4 holds pointer to the pid
# f14-f31 are non volatiles
PUSH_BASIC_STACK(256)
std r3,STACK_FRAME_PARAM(0)(sp) # Address of darray
std r4,STACK_FRAME_PARAM(1)(sp) # Address of pid
PUSH_FPU(STACK_FRAME_LOCAL(2,0))
bl load_fpu
nop
li r0,__NR_fork
sc
# pass the result of the fork to the caller
ld r9,STACK_FRAME_PARAM(1)(sp)
std r3,0(r9)
ld r3,STACK_FRAME_PARAM(0)(sp)
bl check_fpu
nop
POP_FPU(STACK_FRAME_LOCAL(2,0))
POP_BASIC_STACK(256)
blr
FUNC_END(test_fpu)
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