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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * FPU helper code to use FPU operations from inside the kernel * * Copyright (C) 2010 Alexander Graf (agraf@suse.de) */ #include <linux/pgtable.h> #include <linux/linkage.h> #include <asm/reg.h> #include <asm/page.h> #include <asm/mmu.h> #include <asm/cputable.h> #include <asm/cache.h> #include <asm/thread_info.h> #include <asm/ppc_asm.h> #include <asm/asm-offsets.h> /* Instructions operating on single parameters */ /* * Single operation with one input operand * * R3 = (double*)&fpscr * R4 = (short*)&result * R5 = (short*)¶m1 */ #define FPS_ONE_IN(name) \ _GLOBAL(fps_ ## name); \ lfd 0,0(r3); /* load up fpscr value */ \ MTFSF_L(0); \ lfs 0,0(r5); \ \ name 0,0; \ \ stfs 0,0(r4); \ mffs 0; \ stfd 0,0(r3); /* save new fpscr value */ \ blr /* * Single operation with two input operands * * R3 = (double*)&fpscr * R4 = (short*)&result * R5 = (short*)¶m1 * R6 = (short*)¶m2 */ #define FPS_TWO_IN(name) \ _GLOBAL(fps_ ## name); \ lfd 0,0(r3); /* load up fpscr value */ \ MTFSF_L(0); \ lfs 0,0(r5); \ lfs 1,0(r6); \ \ name 0,0,1; \ \ stfs 0,0(r4); \ mffs 0; \ stfd 0,0(r3); /* save new fpscr value */ \ blr /* * Single operation with three input operands * * R3 = (double*)&fpscr * R4 = (short*)&result * R5 = (short*)¶m1 * R6 = (short*)¶m2 * R7 = (short*)¶m3 */ #define FPS_THREE_IN(name) \ _GLOBAL(fps_ ## name); \ lfd 0,0(r3); /* load up fpscr value */ \ MTFSF_L(0); \ lfs 0,0(r5); \ lfs 1,0(r6); \ lfs 2,0(r7); \ \ name 0,0,1,2; \ \ stfs 0,0(r4); \ mffs 0; \ stfd 0,0(r3); /* save new fpscr value */ \ blr FPS_ONE_IN(fres) FPS_ONE_IN(frsqrte) FPS_ONE_IN(fsqrts) FPS_TWO_IN(fadds) FPS_TWO_IN(fdivs) FPS_TWO_IN(fmuls) FPS_TWO_IN(fsubs) FPS_THREE_IN(fmadds) FPS_THREE_IN(fmsubs) FPS_THREE_IN(fnmadds) FPS_THREE_IN(fnmsubs) FPS_THREE_IN(fsel) /* Instructions operating on double parameters */ /* * Beginning of double instruction processing * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)&result * R6 = (double*)¶m1 * R7 = (double*)¶m2 [load_two] * R8 = (double*)¶m3 [load_three] * LR = instruction call function */ SYM_FUNC_START_LOCAL(fpd_load_three) lfd 2,0(r8) /* load param3 */ SYM_FUNC_START_LOCAL(fpd_load_two) lfd 1,0(r7) /* load param2 */ SYM_FUNC_START_LOCAL(fpd_load_one) lfd 0,0(r6) /* load param1 */ SYM_FUNC_START_LOCAL(fpd_load_none) lfd 3,0(r3) /* load up fpscr value */ MTFSF_L(3) lwz r6, 0(r4) /* load cr */ mtcr r6 blr SYM_FUNC_END(fpd_load_none) SYM_FUNC_END(fpd_load_one) SYM_FUNC_END(fpd_load_two) SYM_FUNC_END(fpd_load_three) /* * End of double instruction processing * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)&result * LR = caller of instruction call function */ SYM_FUNC_START_LOCAL(fpd_return) mfcr r6 stfd 0,0(r5) /* save result */ mffs 0 stfd 0,0(r3) /* save new fpscr value */ stw r6,0(r4) /* save new cr value */ blr SYM_FUNC_END(fpd_return) /* * Double operation with no input operand * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)&result */ #define FPD_NONE_IN(name) \ _GLOBAL(fpd_ ## name); \ mflr r12; \ bl fpd_load_none; \ mtlr r12; \ \ name. 0; /* call instruction */ \ b fpd_return /* * Double operation with one input operand * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)&result * R6 = (double*)¶m1 */ #define FPD_ONE_IN(name) \ _GLOBAL(fpd_ ## name); \ mflr r12; \ bl fpd_load_one; \ mtlr r12; \ \ name. 0,0; /* call instruction */ \ b fpd_return /* * Double operation with two input operands * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)&result * R6 = (double*)¶m1 * R7 = (double*)¶m2 * R8 = (double*)¶m3 */ #define FPD_TWO_IN(name) \ _GLOBAL(fpd_ ## name); \ mflr r12; \ bl fpd_load_two; \ mtlr r12; \ \ name. 0,0,1; /* call instruction */ \ b fpd_return /* * CR Double operation with two input operands * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)¶m1 * R6 = (double*)¶m2 * R7 = (double*)¶m3 */ #define FPD_TWO_IN_CR(name) \ _GLOBAL(fpd_ ## name); \ lfd 1,0(r6); /* load param2 */ \ lfd 0,0(r5); /* load param1 */ \ lfd 3,0(r3); /* load up fpscr value */ \ MTFSF_L(3); \ lwz r6, 0(r4); /* load cr */ \ mtcr r6; \ \ name 0,0,1; /* call instruction */ \ mfcr r6; \ mffs 0; \ stfd 0,0(r3); /* save new fpscr value */ \ stw r6,0(r4); /* save new cr value */ \ blr /* * Double operation with three input operands * * R3 = (double*)&fpscr * R4 = (u32*)&cr * R5 = (double*)&result * R6 = (double*)¶m1 * R7 = (double*)¶m2 * R8 = (double*)¶m3 */ #define FPD_THREE_IN(name) \ _GLOBAL(fpd_ ## name); \ mflr r12; \ bl fpd_load_three; \ mtlr r12; \ \ name. 0,0,1,2; /* call instruction */ \ b fpd_return FPD_ONE_IN(fsqrts) FPD_ONE_IN(frsqrtes) FPD_ONE_IN(fres) FPD_ONE_IN(frsp) FPD_ONE_IN(fctiw) FPD_ONE_IN(fctiwz) FPD_ONE_IN(fsqrt) FPD_ONE_IN(fre) FPD_ONE_IN(frsqrte) FPD_ONE_IN(fneg) FPD_ONE_IN(fabs) FPD_TWO_IN(fadds) FPD_TWO_IN(fsubs) FPD_TWO_IN(fdivs) FPD_TWO_IN(fmuls) FPD_TWO_IN_CR(fcmpu) FPD_TWO_IN(fcpsgn) FPD_TWO_IN(fdiv) FPD_TWO_IN(fadd) FPD_TWO_IN(fmul) FPD_TWO_IN_CR(fcmpo) FPD_TWO_IN(fsub) FPD_THREE_IN(fmsubs) FPD_THREE_IN(fmadds) FPD_THREE_IN(fnmsubs) FPD_THREE_IN(fnmadds) FPD_THREE_IN(fsel) FPD_THREE_IN(fmsub) FPD_THREE_IN(fmadd) FPD_THREE_IN(fnmsub) FPD_THREE_IN(fnmadd) _GLOBAL(kvm_cvt_fd) lfs 0,0(r3) stfd 0,0(r4) blr _GLOBAL(kvm_cvt_df) lfd 0,0(r3) stfs 0,0(r4) blr |