projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b00dc837 | 1 | /* |
| 1da177e4 LT |
2 | * VISsave.S: Code for saving FPU register state for |
| 3 | * VIS routines. One should not call this directly, | |
| 4 | * but use macros provided in <asm/visasm.h>. | |
| 5 | * | |
| 6 | * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) | |
| 7 | */ | |
| 8 | ||
| 9 | #include <asm/asi.h> | |
| 10 | #include <asm/page.h> | |
| 11 | #include <asm/ptrace.h> | |
| 12 | #include <asm/visasm.h> | |
| 13 | #include <asm/thread_info.h> | |
| 14 | ||
| 15 | .text | |
| 16 | .globl VISenter, VISenterhalf | |
| 17 | ||
| 18 | /* On entry: %o5=current FPRS value, %g7 is callers address */ | |
| 19 | /* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ | |
| 20 | ||
| 21 | /* Nothing special need be done here to handle pre-emption, this | |
| 22 | * FPU save/restore mechanism is already preemption safe. | |
| 23 | */ | |
| 24 | ||
| 25 | .align 32 | |
| 26 | VISenter: | |
| 27 | ldub [%g6 + TI_FPDEPTH], %g1 | |
| 28 | brnz,a,pn %g1, 1f | |
| 29 | cmp %g1, 1 | |
| 30 | stb %g0, [%g6 + TI_FPSAVED] | |
| 31 | stx %fsr, [%g6 + TI_XFSR] | |
| 32 | 9: jmpl %g7 + %g0, %g0 | |
| 33 | nop | |
| 34 | 1: bne,pn %icc, 2f | |
| 35 | ||
| 36 | srl %g1, 1, %g1 | |
| 37 | vis1: ldub [%g6 + TI_FPSAVED], %g3 | |
| 38 | stx %fsr, [%g6 + TI_XFSR] | |
| 39 | or %g3, %o5, %g3 | |
| 40 | stb %g3, [%g6 + TI_FPSAVED] | |
| 41 | rd %gsr, %g3 | |
| 42 | clr %g1 | |
| 43 | ba,pt %xcc, 3f | |
| 44 | ||
| 45 | stx %g3, [%g6 + TI_GSR] | |
| 46 | 2: add %g6, %g1, %g3 | |
| 47 | cmp %o5, FPRS_DU | |
| 48 | be,pn %icc, 6f | |
| 49 | sll %g1, 3, %g1 | |
| 50 | stb %o5, [%g3 + TI_FPSAVED] | |
| 51 | rd %gsr, %g2 | |
| 52 | add %g6, %g1, %g3 | |
| 53 | stx %g2, [%g3 + TI_GSR] | |
| 54 | ||
| 55 | add %g6, %g1, %g2 | |
| 56 | stx %fsr, [%g2 + TI_XFSR] | |
| 57 | sll %g1, 5, %g1 | |
| 58 | 3: andcc %o5, FPRS_DL|FPRS_DU, %g0 | |
| 59 | be,pn %icc, 9b | |
| 60 | add %g6, TI_FPREGS, %g2 | |
| 61 | andcc %o5, FPRS_DL, %g0 | |
| 1da177e4 LT |
62 | |
| 63 | be,pn %icc, 4f | |
| 64 | add %g6, TI_FPREGS+0x40, %g3 | |
| ba639933 | 65 | membar #Sync |
| 1da177e4 LT |
66 | stda %f0, [%g2 + %g1] ASI_BLK_P |
| 67 | stda %f16, [%g3 + %g1] ASI_BLK_P | |
| ba639933 | 68 | membar #Sync |
| 1da177e4 LT |
69 | andcc %o5, FPRS_DU, %g0 |
| 70 | be,pn %icc, 5f | |
| 71 | 4: add %g1, 128, %g1 | |
| ba639933 | 72 | membar #Sync |
| 1da177e4 LT |
73 | stda %f32, [%g2 + %g1] ASI_BLK_P |
| 74 | ||
| 75 | stda %f48, [%g3 + %g1] ASI_BLK_P | |
| 76 | 5: membar #Sync | |
| b445e26c DM |
77 | ba,pt %xcc, 80f |
| 78 | nop | |
| 79 | ||
| 80 | .align 32 | |
| 81 | 80: jmpl %g7 + %g0, %g0 | |
| 1da177e4 LT |
82 | nop |
| 83 | ||
| 84 | 6: ldub [%g3 + TI_FPSAVED], %o5 | |
| 85 | or %o5, FPRS_DU, %o5 | |
| 86 | add %g6, TI_FPREGS+0x80, %g2 | |
| 87 | stb %o5, [%g3 + TI_FPSAVED] | |
| 88 | ||
| 89 | sll %g1, 5, %g1 | |
| 90 | add %g6, TI_FPREGS+0xc0, %g3 | |
| 91 | wr %g0, FPRS_FEF, %fprs | |
| ba639933 | 92 | membar #Sync |
| 1da177e4 LT |
93 | stda %f32, [%g2 + %g1] ASI_BLK_P |
| 94 | stda %f48, [%g3 + %g1] ASI_BLK_P | |
| 95 | membar #Sync | |
| b445e26c DM |
96 | ba,pt %xcc, 80f |
| 97 | nop | |
| 1da177e4 | 98 | |
| b445e26c DM |
99 | .align 32 |
| 100 | 80: jmpl %g7 + %g0, %g0 | |
| 1da177e4 LT |
101 | nop |
| 102 | ||
| 103 | .align 32 | |
| 104 | VISenterhalf: | |
| 105 | ldub [%g6 + TI_FPDEPTH], %g1 | |
| 106 | brnz,a,pn %g1, 1f | |
| 107 | cmp %g1, 1 | |
| 108 | stb %g0, [%g6 + TI_FPSAVED] | |
| 109 | stx %fsr, [%g6 + TI_XFSR] | |
| 110 | clr %o5 | |
| 111 | jmpl %g7 + %g0, %g0 | |
| 112 | wr %g0, FPRS_FEF, %fprs | |
| 113 | ||
| 114 | 1: bne,pn %icc, 2f | |
| 115 | srl %g1, 1, %g1 | |
| 116 | ba,pt %xcc, vis1 | |
| 117 | sub %g7, 8, %g7 | |
| 118 | 2: addcc %g6, %g1, %g3 | |
| 119 | sll %g1, 3, %g1 | |
| 120 | andn %o5, FPRS_DU, %g2 | |
| 121 | stb %g2, [%g3 + TI_FPSAVED] | |
| 122 | ||
| 123 | rd %gsr, %g2 | |
| 124 | add %g6, %g1, %g3 | |
| 125 | stx %g2, [%g3 + TI_GSR] | |
| 126 | add %g6, %g1, %g2 | |
| 127 | stx %fsr, [%g2 + TI_XFSR] | |
| 128 | sll %g1, 5, %g1 | |
| 129 | 3: andcc %o5, FPRS_DL, %g0 | |
| 130 | be,pn %icc, 4f | |
| 131 | add %g6, TI_FPREGS, %g2 | |
| 132 | ||
| 1da177e4 | 133 | add %g6, TI_FPREGS+0x40, %g3 |
| ba639933 | 134 | membar #Sync |
| 1da177e4 LT |
135 | stda %f0, [%g2 + %g1] ASI_BLK_P |
| 136 | stda %f16, [%g3 + %g1] ASI_BLK_P | |
| 137 | membar #Sync | |
| b445e26c DM |
138 | ba,pt %xcc, 4f |
| 139 | nop | |
| 140 | ||
| 141 | .align 32 | |
| 1da177e4 LT |
142 | 4: and %o5, FPRS_DU, %o5 |
| 143 | jmpl %g7 + %g0, %g0 | |
| 144 | wr %o5, FPRS_FEF, %fprs |