| /* |
| * r6000_fpu.S: Save/restore floating point context for signal handlers. |
| * |
| * 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. |
| * |
| * Copyright (C) 1996 by Ralf Baechle |
| * |
| * Multi-arch abstraction and asm macros for easier reading: |
| * Copyright (C) 1996 David S. Miller (davem@davemloft.net) |
| */ |
| #include <asm/asm.h> |
| #include <asm/fpregdef.h> |
| #include <asm/mipsregs.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/regdef.h> |
| |
| .set noreorder |
| .set mips2 |
| .set push |
| SET_HARDFLOAT |
| |
| /** |
| * _save_fp_context() - save FP context from the FPU |
| * @a0 - pointer to fpregs field of sigcontext |
| * @a1 - pointer to fpc_csr field of sigcontext |
| * |
| * Save FP context, including the 32 FP data registers and the FP |
| * control & status register, from the FPU to signal context. |
| */ |
| LEAF(_save_fp_context) |
| mfc0 t0,CP0_STATUS |
| sll t0,t0,2 |
| bgez t0,1f |
| nop |
| |
| cfc1 t1,fcr31 |
| /* Store the 16 double precision registers */ |
| sdc1 $f0,0(a0) |
| sdc1 $f2,16(a0) |
| sdc1 $f4,32(a0) |
| sdc1 $f6,48(a0) |
| sdc1 $f8,64(a0) |
| sdc1 $f10,80(a0) |
| sdc1 $f12,96(a0) |
| sdc1 $f14,112(a0) |
| sdc1 $f16,128(a0) |
| sdc1 $f18,144(a0) |
| sdc1 $f20,160(a0) |
| sdc1 $f22,176(a0) |
| sdc1 $f24,192(a0) |
| sdc1 $f26,208(a0) |
| sdc1 $f28,224(a0) |
| sdc1 $f30,240(a0) |
| jr ra |
| sw t0,(a1) |
| 1: jr ra |
| nop |
| END(_save_fp_context) |
| |
| /** |
| * _restore_fp_context() - restore FP context to the FPU |
| * @a0 - pointer to fpregs field of sigcontext |
| * @a1 - pointer to fpc_csr field of sigcontext |
| * |
| * Restore FP context, including the 32 FP data registers and the FP |
| * control & status register, from signal context to the FPU. |
| */ |
| LEAF(_restore_fp_context) |
| mfc0 t0,CP0_STATUS |
| sll t0,t0,2 |
| |
| bgez t0,1f |
| lw t0,(a1) |
| /* Restore the 16 double precision registers */ |
| ldc1 $f0,0(a0) |
| ldc1 $f2,16(a0) |
| ldc1 $f4,32(a0) |
| ldc1 $f6,48(a0) |
| ldc1 $f8,64(a0) |
| ldc1 $f10,80(a0) |
| ldc1 $f12,96(a0) |
| ldc1 $f14,112(a0) |
| ldc1 $f16,128(a0) |
| ldc1 $f18,144(a0) |
| ldc1 $f20,160(a0) |
| ldc1 $f22,176(a0) |
| ldc1 $f24,192(a0) |
| ldc1 $f26,208(a0) |
| ldc1 $f28,224(a0) |
| ldc1 $f30,240(a0) |
| jr ra |
| ctc1 t0,fcr31 |
| 1: jr ra |
| nop |
| END(_restore_fp_context) |
| |
| .set pop /* SET_HARDFLOAT */ |
