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| /*
| * 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, 1998 by Ralf Baechle
| *
| * Multi-arch abstraction and asm macros for easier reading:
| * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
| *
| * Further modifications to make this work:
| * Copyright (c) 1998 Harald Koerfgen
| */
| #include <asm/asm.h>
| #include <asm/asmmacro.h>
| #include <asm/errno.h>
| #include <asm/export.h>
| #include <asm/fpregdef.h>
| #include <asm/mipsregs.h>
| #include <asm/asm-offsets.h>
| #include <asm/regdef.h>
|
| #define EX(a,b) \
| 9: a,##b; \
| .section __ex_table,"a"; \
| PTR 9b,fault; \
| .previous
|
| #define EX2(a,b) \
| 9: a,##b; \
| .section __ex_table,"a"; \
| PTR 9b,fault; \
| PTR 9b+4,fault; \
| .previous
|
| .set mips1
|
| /*
| * Save a thread's fp context.
| */
| LEAF(_save_fp)
| EXPORT_SYMBOL(_save_fp)
| fpu_save_single a0, t1 # clobbers t1
| jr ra
| END(_save_fp)
|
| /*
| * Restore a thread's fp context.
| */
| LEAF(_restore_fp)
| fpu_restore_single a0, t1 # clobbers t1
| jr ra
| END(_restore_fp)
|
| /*
| * Load the FPU with signalling NANS. This bit pattern we're using has
| * the property that no matter whether considered as single or as double
| * precision represents signaling NANS.
| *
| * The value to initialize fcr31 to comes in $a0.
| */
|
| .set push
| SET_HARDFLOAT
|
| LEAF(_init_fpu)
| mfc0 t0, CP0_STATUS
| li t1, ST0_CU1
| or t0, t1
| mtc0 t0, CP0_STATUS
|
| ctc1 a0, fcr31
|
| li t0, -1
|
| mtc1 t0, $f0
| mtc1 t0, $f1
| mtc1 t0, $f2
| mtc1 t0, $f3
| mtc1 t0, $f4
| mtc1 t0, $f5
| mtc1 t0, $f6
| mtc1 t0, $f7
| mtc1 t0, $f8
| mtc1 t0, $f9
| mtc1 t0, $f10
| mtc1 t0, $f11
| mtc1 t0, $f12
| mtc1 t0, $f13
| mtc1 t0, $f14
| mtc1 t0, $f15
| mtc1 t0, $f16
| mtc1 t0, $f17
| mtc1 t0, $f18
| mtc1 t0, $f19
| mtc1 t0, $f20
| mtc1 t0, $f21
| mtc1 t0, $f22
| mtc1 t0, $f23
| mtc1 t0, $f24
| mtc1 t0, $f25
| mtc1 t0, $f26
| mtc1 t0, $f27
| mtc1 t0, $f28
| mtc1 t0, $f29
| mtc1 t0, $f30
| mtc1 t0, $f31
| jr ra
| END(_init_fpu)
|
| .set pop
|
| .set noreorder
|
| /**
| * _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)
| .set push
| SET_HARDFLOAT
| li v0, 0 # assume success
| cfc1 t1, fcr31
| EX2(s.d $f0, 0(a0))
| EX2(s.d $f2, 16(a0))
| EX2(s.d $f4, 32(a0))
| EX2(s.d $f6, 48(a0))
| EX2(s.d $f8, 64(a0))
| EX2(s.d $f10, 80(a0))
| EX2(s.d $f12, 96(a0))
| EX2(s.d $f14, 112(a0))
| EX2(s.d $f16, 128(a0))
| EX2(s.d $f18, 144(a0))
| EX2(s.d $f20, 160(a0))
| EX2(s.d $f22, 176(a0))
| EX2(s.d $f24, 192(a0))
| EX2(s.d $f26, 208(a0))
| EX2(s.d $f28, 224(a0))
| EX2(s.d $f30, 240(a0))
| jr ra
| EX(sw t1, (a1))
| .set pop
| 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)
| .set push
| SET_HARDFLOAT
| li v0, 0 # assume success
| EX(lw t0, (a1))
| EX2(l.d $f0, 0(a0))
| EX2(l.d $f2, 16(a0))
| EX2(l.d $f4, 32(a0))
| EX2(l.d $f6, 48(a0))
| EX2(l.d $f8, 64(a0))
| EX2(l.d $f10, 80(a0))
| EX2(l.d $f12, 96(a0))
| EX2(l.d $f14, 112(a0))
| EX2(l.d $f16, 128(a0))
| EX2(l.d $f18, 144(a0))
| EX2(l.d $f20, 160(a0))
| EX2(l.d $f22, 176(a0))
| EX2(l.d $f24, 192(a0))
| EX2(l.d $f26, 208(a0))
| EX2(l.d $f28, 224(a0))
| EX2(l.d $f30, 240(a0))
| jr ra
| ctc1 t0, fcr31
| .set pop
| END(_restore_fp_context)
| .set reorder
|
| .type fault, @function
| .ent fault
| fault: li v0, -EFAULT
| jr ra
| .end fault
|
|
