111 lines
2.9 KiB
ArmAsm
111 lines
2.9 KiB
ArmAsm
/*
|
|
* Copyright (c) 2011 Aeroflex Gaisler
|
|
*
|
|
* BSD license:
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
|
|
#include <asm-leon/asmmacro.h>
|
|
#include <asm-leon/leonstack.h>
|
|
#include <asm-leon/winmacros.h>
|
|
#include <asm-leon/leon.h>
|
|
|
|
#ifndef _SOFT_FLOAT
|
|
|
|
.seg "text"
|
|
/* ------- */
|
|
.weak _fpdis_enable_svt
|
|
.set _fpdis_enable_svt,__fpdis_enable_svt
|
|
.weak _fpdis_enable
|
|
.set _fpdis_enable,__fpdis_enable
|
|
/* ------- */
|
|
!.global _fpdis_enable,_fpdis_enable_svt
|
|
__fpdis_enable_svt:
|
|
__fpdis_enable:
|
|
|
|
set SPARC_PSR_EF_MASK,%l3
|
|
or %l0,%l3,%l0
|
|
or %l0,0xf00, %l3 ! PIL up to 15, enable fpu
|
|
wr %l3,0, %psr ! restore the condition flags, enable fpu
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
mov %psr, %l3 ! check if fpu is present
|
|
set SPARC_PSR_EF_MASK,%l4
|
|
andcc %l3, %l4, %l3
|
|
bne 4f
|
|
nop
|
|
|
|
ta 0 ! no fpu present, halt
|
|
|
|
4:
|
|
set fpustate_current,%l4
|
|
|
|
ld [%l4],%l4
|
|
set fpustate_owner,%l5
|
|
ld [%l5],%l5
|
|
cmp %l4,%l5
|
|
beq mpfnostore
|
|
nop
|
|
cmp %g0,%l5
|
|
beq mpfstore
|
|
nop
|
|
|
|
FW_STORE(%l5)
|
|
|
|
mpfstore:
|
|
set fpustate_owner,%l6
|
|
st %l4,[%l6]
|
|
cmp %g0,%l4
|
|
beq mpfnostore
|
|
nop
|
|
|
|
FW_LOAD(%l4)
|
|
|
|
mpfnostore:
|
|
wr %l0,0, %psr ! restore the condition flags, enable fpu
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
jmpl %l1, %g0
|
|
rett %l2
|
|
|
|
.seg "data"
|
|
|
|
.global fpustate_default
|
|
.align 8
|
|
fpustate_default:
|
|
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
|
|
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
|
|
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
|
|
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
|
|
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
|
|
.global fpustate_owner
|
|
fpustate_owner:
|
|
.word fpustate_default ! pointer to FPU owning context
|
|
|
|
.global fpustate_current
|
|
fpustate_current:
|
|
.word fpustate_default ! pointer to current threads FPU context
|
|
|
|
#endif
|