| /* |
| * 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 |
| /* Save floating point 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,(SC_FPREGS+0)(a0) |
| sdc1 $f2,(SC_FPREGS+16)(a0) |
| sdc1 $f4,(SC_FPREGS+32)(a0) |
| sdc1 $f6,(SC_FPREGS+48)(a0) |
| sdc1 $f8,(SC_FPREGS+64)(a0) |
| sdc1 $f10,(SC_FPREGS+80)(a0) |
| sdc1 $f12,(SC_FPREGS+96)(a0) |
| sdc1 $f14,(SC_FPREGS+112)(a0) |
| sdc1 $f16,(SC_FPREGS+128)(a0) |
| sdc1 $f18,(SC_FPREGS+144)(a0) |
| sdc1 $f20,(SC_FPREGS+160)(a0) |
| sdc1 $f22,(SC_FPREGS+176)(a0) |
| sdc1 $f24,(SC_FPREGS+192)(a0) |
| sdc1 $f26,(SC_FPREGS+208)(a0) |
| sdc1 $f28,(SC_FPREGS+224)(a0) |
| sdc1 $f30,(SC_FPREGS+240)(a0) |
| jr ra |
| sw t0,SC_FPC_CSR(a0) |
| 1: jr ra |
| nop |
| END(_save_fp_context) |
| |
| /* Restore FPU state: |
| * - fp gp registers |
| * - cp1 status/control register |
| * |
| * We base the decision which registers to restore from the signal stack |
| * frame on the current content of c0_status, not on the content of the |
| * stack frame which might have been changed by the user. |
| */ |
| LEAF(_restore_fp_context) |
| mfc0 t0,CP0_STATUS |
| sll t0,t0,2 |
| |
| bgez t0,1f |
| lw t0,SC_FPC_CSR(a0) |
| /* Restore the 16 double precision registers */ |
| ldc1 $f0,(SC_FPREGS+0)(a0) |
| ldc1 $f2,(SC_FPREGS+16)(a0) |
| ldc1 $f4,(SC_FPREGS+32)(a0) |
| ldc1 $f6,(SC_FPREGS+48)(a0) |
| ldc1 $f8,(SC_FPREGS+64)(a0) |
| ldc1 $f10,(SC_FPREGS+80)(a0) |
| ldc1 $f12,(SC_FPREGS+96)(a0) |
| ldc1 $f14,(SC_FPREGS+112)(a0) |
| ldc1 $f16,(SC_FPREGS+128)(a0) |
| ldc1 $f18,(SC_FPREGS+144)(a0) |
| ldc1 $f20,(SC_FPREGS+160)(a0) |
| ldc1 $f22,(SC_FPREGS+176)(a0) |
| ldc1 $f24,(SC_FPREGS+192)(a0) |
| ldc1 $f26,(SC_FPREGS+208)(a0) |
| ldc1 $f28,(SC_FPREGS+224)(a0) |
| ldc1 $f30,(SC_FPREGS+240)(a0) |
| jr ra |
| ctc1 t0,fcr31 |
| 1: jr ra |
| nop |
| END(_restore_fp_context) |