forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.0 KiB
125 lines
3.0 KiB
/* |
|
* This file is subject to the terms and conditions of the GNU General Public |
|
* License. See the file "COPYING" in the main directory of this archive |
|
* for more details. |
|
* |
|
* FPU context handling code for KVM. |
|
* |
|
* Copyright (C) 2015 Imagination Technologies Ltd. |
|
*/ |
|
|
|
#include <asm/asm.h> |
|
#include <asm/asm-offsets.h> |
|
#include <asm/fpregdef.h> |
|
#include <asm/mipsregs.h> |
|
#include <asm/regdef.h> |
|
|
|
/* preprocessor replaces the fp in ".set fp=64" with $30 otherwise */ |
|
#undef fp |
|
|
|
.set noreorder |
|
.set noat |
|
|
|
LEAF(__kvm_save_fpu) |
|
.set push |
|
SET_HARDFLOAT |
|
.set fp=64 |
|
mfc0 t0, CP0_STATUS |
|
sll t0, t0, 5 # is Status.FR set? |
|
bgez t0, 1f # no: skip odd doubles |
|
nop |
|
sdc1 $f1, VCPU_FPR1(a0) |
|
sdc1 $f3, VCPU_FPR3(a0) |
|
sdc1 $f5, VCPU_FPR5(a0) |
|
sdc1 $f7, VCPU_FPR7(a0) |
|
sdc1 $f9, VCPU_FPR9(a0) |
|
sdc1 $f11, VCPU_FPR11(a0) |
|
sdc1 $f13, VCPU_FPR13(a0) |
|
sdc1 $f15, VCPU_FPR15(a0) |
|
sdc1 $f17, VCPU_FPR17(a0) |
|
sdc1 $f19, VCPU_FPR19(a0) |
|
sdc1 $f21, VCPU_FPR21(a0) |
|
sdc1 $f23, VCPU_FPR23(a0) |
|
sdc1 $f25, VCPU_FPR25(a0) |
|
sdc1 $f27, VCPU_FPR27(a0) |
|
sdc1 $f29, VCPU_FPR29(a0) |
|
sdc1 $f31, VCPU_FPR31(a0) |
|
1: sdc1 $f0, VCPU_FPR0(a0) |
|
sdc1 $f2, VCPU_FPR2(a0) |
|
sdc1 $f4, VCPU_FPR4(a0) |
|
sdc1 $f6, VCPU_FPR6(a0) |
|
sdc1 $f8, VCPU_FPR8(a0) |
|
sdc1 $f10, VCPU_FPR10(a0) |
|
sdc1 $f12, VCPU_FPR12(a0) |
|
sdc1 $f14, VCPU_FPR14(a0) |
|
sdc1 $f16, VCPU_FPR16(a0) |
|
sdc1 $f18, VCPU_FPR18(a0) |
|
sdc1 $f20, VCPU_FPR20(a0) |
|
sdc1 $f22, VCPU_FPR22(a0) |
|
sdc1 $f24, VCPU_FPR24(a0) |
|
sdc1 $f26, VCPU_FPR26(a0) |
|
sdc1 $f28, VCPU_FPR28(a0) |
|
jr ra |
|
sdc1 $f30, VCPU_FPR30(a0) |
|
.set pop |
|
END(__kvm_save_fpu) |
|
|
|
LEAF(__kvm_restore_fpu) |
|
.set push |
|
SET_HARDFLOAT |
|
.set fp=64 |
|
mfc0 t0, CP0_STATUS |
|
sll t0, t0, 5 # is Status.FR set? |
|
bgez t0, 1f # no: skip odd doubles |
|
nop |
|
ldc1 $f1, VCPU_FPR1(a0) |
|
ldc1 $f3, VCPU_FPR3(a0) |
|
ldc1 $f5, VCPU_FPR5(a0) |
|
ldc1 $f7, VCPU_FPR7(a0) |
|
ldc1 $f9, VCPU_FPR9(a0) |
|
ldc1 $f11, VCPU_FPR11(a0) |
|
ldc1 $f13, VCPU_FPR13(a0) |
|
ldc1 $f15, VCPU_FPR15(a0) |
|
ldc1 $f17, VCPU_FPR17(a0) |
|
ldc1 $f19, VCPU_FPR19(a0) |
|
ldc1 $f21, VCPU_FPR21(a0) |
|
ldc1 $f23, VCPU_FPR23(a0) |
|
ldc1 $f25, VCPU_FPR25(a0) |
|
ldc1 $f27, VCPU_FPR27(a0) |
|
ldc1 $f29, VCPU_FPR29(a0) |
|
ldc1 $f31, VCPU_FPR31(a0) |
|
1: ldc1 $f0, VCPU_FPR0(a0) |
|
ldc1 $f2, VCPU_FPR2(a0) |
|
ldc1 $f4, VCPU_FPR4(a0) |
|
ldc1 $f6, VCPU_FPR6(a0) |
|
ldc1 $f8, VCPU_FPR8(a0) |
|
ldc1 $f10, VCPU_FPR10(a0) |
|
ldc1 $f12, VCPU_FPR12(a0) |
|
ldc1 $f14, VCPU_FPR14(a0) |
|
ldc1 $f16, VCPU_FPR16(a0) |
|
ldc1 $f18, VCPU_FPR18(a0) |
|
ldc1 $f20, VCPU_FPR20(a0) |
|
ldc1 $f22, VCPU_FPR22(a0) |
|
ldc1 $f24, VCPU_FPR24(a0) |
|
ldc1 $f26, VCPU_FPR26(a0) |
|
ldc1 $f28, VCPU_FPR28(a0) |
|
jr ra |
|
ldc1 $f30, VCPU_FPR30(a0) |
|
.set pop |
|
END(__kvm_restore_fpu) |
|
|
|
LEAF(__kvm_restore_fcsr) |
|
.set push |
|
SET_HARDFLOAT |
|
lw t0, VCPU_FCR31(a0) |
|
/* |
|
* The ctc1 must stay at this offset in __kvm_restore_fcsr. |
|
* See kvm_mips_csr_die_notify() which handles t0 containing a value |
|
* which triggers an FP Exception, which must be stepped over and |
|
* ignored since the set cause bits must remain there for the guest. |
|
*/ |
|
ctc1 t0, fcr31 |
|
jr ra |
|
nop |
|
.set pop |
|
END(__kvm_restore_fcsr)
|
|
|