mips/kernel/r2300_fpu.S

8  * Multi-arch abstraction and asm macros for easier reading:
20 #include <asm/asm-offsets.h>
23 #define EX(a,b)							\  argument
24 9:	a,##b;							\
25 	.section __ex_table,"a";				\
26 	PTR_WD	9b,fault;					\
29 #define EX2(a,b)						\  argument
30 9:	a,##b;							\
31 	.section __ex_table,"a";				\
32 	PTR_WD	9b,fault;					\
33 	PTR_WD	9b+4,fault;					\
39  * Save a thread's fp context.
48  * Restore a thread's fp context.
58  * _save_fp_context() - save FP context from the FPU
59  * @a0 - pointer to fpregs field of sigcontext
60  * @a1 - pointer to fpc_csr field of sigcontext
68 	li	v0, 0					# assume success
70 	EX2(s.d $f0, 0(a0))
71 	EX2(s.d $f2, 16(a0))
72 	EX2(s.d $f4, 32(a0))
73 	EX2(s.d $f6, 48(a0))
74 	EX2(s.d $f8, 64(a0))
75 	EX2(s.d $f10, 80(a0))
76 	EX2(s.d $f12, 96(a0))
77 	EX2(s.d $f14, 112(a0))
78 	EX2(s.d $f16, 128(a0))
79 	EX2(s.d $f18, 144(a0))
80 	EX2(s.d $f20, 160(a0))
81 	EX2(s.d $f22, 176(a0))
82 	EX2(s.d $f24, 192(a0))
83 	EX2(s.d $f26, 208(a0))
84 	EX2(s.d $f28, 224(a0))
85 	EX2(s.d $f30, 240(a0))
92  * _restore_fp_context() - restore FP context to the FPU
93  * @a0 - pointer to fpregs field of sigcontext
94  * @a1 - pointer to fpc_csr field of sigcontext
102 	li	v0, 0					# assume success
104 	EX2(l.d $f0, 0(a0))
105 	EX2(l.d $f2, 16(a0))
106 	EX2(l.d $f4, 32(a0))
107 	EX2(l.d $f6, 48(a0))
108 	EX2(l.d $f8, 64(a0))
109 	EX2(l.d $f10, 80(a0))
110 	EX2(l.d $f12, 96(a0))
111 	EX2(l.d $f14, 112(a0))
112 	EX2(l.d $f16, 128(a0))
113 	EX2(l.d $f18, 144(a0))
114 	EX2(l.d $f20, 160(a0))
115 	EX2(l.d $f22, 176(a0))
116 	EX2(l.d $f24, 192(a0))
117 	EX2(l.d $f26, 208(a0))
118 	EX2(l.d $f28, 224(a0))
119 	EX2(l.d $f30, 240(a0))
128 fault:	li	v0, -EFAULT