arch/powerpc/kvm/book3s_paired_singles.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright Novell Inc 2010
  16  *
  17  * Authors: Alexander Graf <agraf@suse.de>
  18  */
  19
  20 #include <asm/kvm.h>
  21 #include <asm/kvm_ppc.h>
  22 #include <asm/disassemble.h>
  23 #include <asm/kvm_book3s.h>
  24 #include <asm/kvm_fpu.h>
  25 #include <asm/reg.h>
  26 #include <asm/cacheflush.h>
  27 #include <linux/vmalloc.h>
  28
  29 /* #define DEBUG */
  30
  31 #ifdef DEBUG
  32 #define dprintk printk
  33 #else
  34 #define dprintk(...) do { } while(0);
  35 #endif
  36
  37 #define OP_LFS                  48
  38 #define OP_LFSU                 49
  39 #define OP_LFD                  50
  40 #define OP_LFDU                 51
  41 #define OP_STFS                 52
  42 #define OP_STFSU                53
  43 #define OP_STFD                 54
  44 #define OP_STFDU                55
  45 #define OP_PSQ_L                56
  46 #define OP_PSQ_LU               57
  47 #define OP_PSQ_ST               60
  48 #define OP_PSQ_STU              61
  49
  50 #define OP_31_LFSX              535
  51 #define OP_31_LFSUX             567
  52 #define OP_31_LFDX              599
  53 #define OP_31_LFDUX             631
  54 #define OP_31_STFSX             663
  55 #define OP_31_STFSUX            695
  56 #define OP_31_STFX              727
  57 #define OP_31_STFUX             759
  58 #define OP_31_LWIZX             887
  59 #define OP_31_STFIWX            983
  60
  61 #define OP_59_FADDS             21
  62 #define OP_59_FSUBS             20
  63 #define OP_59_FSQRTS            22
  64 #define OP_59_FDIVS             18
  65 #define OP_59_FRES              24
  66 #define OP_59_FMULS             25
  67 #define OP_59_FRSQRTES          26
  68 #define OP_59_FMSUBS            28
  69 #define OP_59_FMADDS            29
  70 #define OP_59_FNMSUBS           30
  71 #define OP_59_FNMADDS           31
  72
  73 #define OP_63_FCMPU             0
  74 #define OP_63_FCPSGN            8
  75 #define OP_63_FRSP              12
  76 #define OP_63_FCTIW             14
  77 #define OP_63_FCTIWZ            15
  78 #define OP_63_FDIV              18
  79 #define OP_63_FADD              21
  80 #define OP_63_FSQRT             22
  81 #define OP_63_FSEL              23
  82 #define OP_63_FRE               24
  83 #define OP_63_FMUL              25
  84 #define OP_63_FRSQRTE           26
  85 #define OP_63_FMSUB             28
  86 #define OP_63_FMADD             29
  87 #define OP_63_FNMSUB            30
  88 #define OP_63_FNMADD            31
  89 #define OP_63_FCMPO             32
  90 #define OP_63_MTFSB1            38 // XXX
  91 #define OP_63_FSUB              20
  92 #define OP_63_FNEG              40
  93 #define OP_63_MCRFS             64
  94 #define OP_63_MTFSB0            70
  95 #define OP_63_FMR               72
  96 #define OP_63_MTFSFI            134
  97 #define OP_63_FABS              264
  98 #define OP_63_MFFS              583
  99 #define OP_63_MTFSF             711
 100
 101 #define OP_4X_PS_CMPU0          0
 102 #define OP_4X_PSQ_LX            6
 103 #define OP_4XW_PSQ_STX          7
 104 #define OP_4A_PS_SUM0           10
 105 #define OP_4A_PS_SUM1           11
 106 #define OP_4A_PS_MULS0          12
 107 #define OP_4A_PS_MULS1          13
 108 #define OP_4A_PS_MADDS0         14
 109 #define OP_4A_PS_MADDS1         15
 110 #define OP_4A_PS_DIV            18
 111 #define OP_4A_PS_SUB            20
 112 #define OP_4A_PS_ADD            21
 113 #define OP_4A_PS_SEL            23
 114 #define OP_4A_PS_RES            24
 115 #define OP_4A_PS_MUL            25
 116 #define OP_4A_PS_RSQRTE         26
 117 #define OP_4A_PS_MSUB           28
 118 #define OP_4A_PS_MADD           29
 119 #define OP_4A_PS_NMSUB          30
 120 #define OP_4A_PS_NMADD          31
 121 #define OP_4X_PS_CMPO0          32
 122 #define OP_4X_PSQ_LUX           38
 123 #define OP_4XW_PSQ_STUX         39
 124 #define OP_4X_PS_NEG            40
 125 #define OP_4X_PS_CMPU1          64
 126 #define OP_4X_PS_MR             72
 127 #define OP_4X_PS_CMPO1          96
 128 #define OP_4X_PS_NABS           136
 129 #define OP_4X_PS_ABS            264
 130 #define OP_4X_PS_MERGE00        528
 131 #define OP_4X_PS_MERGE01        560
 132 #define OP_4X_PS_MERGE10        592
 133 #define OP_4X_PS_MERGE11        624
 134
 135 #define SCALAR_NONE             0
 136 #define SCALAR_HIGH             (1 << 0)
 137 #define SCALAR_LOW              (1 << 1)
 138 #define SCALAR_NO_PS0           (1 << 2)
 139 #define SCALAR_NO_PS1           (1 << 3)
 140
 141 #define GQR_ST_TYPE_MASK        0x00000007
 142 #define GQR_ST_TYPE_SHIFT       0
 143 #define GQR_ST_SCALE_MASK       0x00003f00
 144 #define GQR_ST_SCALE_SHIFT      8
 145 #define GQR_LD_TYPE_MASK        0x00070000
 146 #define GQR_LD_TYPE_SHIFT       16
 147 #define GQR_LD_SCALE_MASK       0x3f000000
 148 #define GQR_LD_SCALE_SHIFT      24
 149
 150 #define GQR_QUANTIZE_FLOAT      0
 151 #define GQR_QUANTIZE_U8         4
 152 #define GQR_QUANTIZE_U16        5
 153 #define GQR_QUANTIZE_S8         6
 154 #define GQR_QUANTIZE_S16        7
 155
 156 #define FPU_LS_SINGLE           0
 157 #define FPU_LS_DOUBLE           1
 158 #define FPU_LS_SINGLE_LOW       2
 159
 160 static inline void kvmppc_sync_qpr(struct kvm_vcpu *vcpu, int rt)
 161 {
 162         kvm_cvt_df(&vcpu->arch.fpr[rt], &vcpu->arch.qpr[rt], &vcpu->arch.fpscr);
 163 }
 164
 165 static void kvmppc_inject_pf(struct kvm_vcpu *vcpu, ulong eaddr, bool is_store)
 166 {
 167         u64 dsisr;
 168         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 169
 170         shared->msr = kvmppc_set_field(shared->msr, 33, 36, 0);
 171         shared->msr = kvmppc_set_field(shared->msr, 42, 47, 0);
 172         shared->dar = eaddr;
 173         /* Page Fault */
 174         dsisr = kvmppc_set_field(0, 33, 33, 1);
 175         if (is_store)
 176                 shared->dsisr = kvmppc_set_field(dsisr, 38, 38, 1);
 177         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
 178 }
 179
 180 static int kvmppc_emulate_fpr_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 181                                    int rs, ulong addr, int ls_type)
 182 {
 183         int emulated = EMULATE_FAIL;
 184         int r;
 185         char tmp[8];
 186         int len = sizeof(u32);
 187
 188         if (ls_type == FPU_LS_DOUBLE)
 189                 len = sizeof(u64);
 190
 191         /* read from memory */
 192         r = kvmppc_ld(vcpu, &addr, len, tmp, true);
 193         vcpu->arch.paddr_accessed = addr;
 194
 195         if (r < 0) {
 196                 kvmppc_inject_pf(vcpu, addr, false);
 197                 goto done_load;
 198         } else if (r == EMULATE_DO_MMIO) {
 199                 emulated = kvmppc_handle_load(run, vcpu, KVM_REG_FPR | rs, len, 1);
 200                 goto done_load;
 201         }
 202
 203         emulated = EMULATE_DONE;
 204
 205         /* put in registers */
 206         switch (ls_type) {
 207         case FPU_LS_SINGLE:
 208                 kvm_cvt_fd((u32*)tmp, &vcpu->arch.fpr[rs], &vcpu->arch.fpscr);
 209                 vcpu->arch.qpr[rs] = *((u32*)tmp);
 210                 break;
 211         case FPU_LS_DOUBLE:
 212                 vcpu->arch.fpr[rs] = *((u64*)tmp);
 213                 break;
 214         }
 215
 216         dprintk(KERN_INFO "KVM: FPR_LD [0x%llx] at 0x%lx (%d)\n", *(u64*)tmp,
 217                           addr, len);
 218
 219 done_load:
 220         return emulated;
 221 }
 222
 223 static int kvmppc_emulate_fpr_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 224                                     int rs, ulong addr, int ls_type)
 225 {
 226         int emulated = EMULATE_FAIL;
 227         int r;
 228         char tmp[8];
 229         u64 val;
 230         int len;
 231
 232         switch (ls_type) {
 233         case FPU_LS_SINGLE:
 234                 kvm_cvt_df(&vcpu->arch.fpr[rs], (u32*)tmp, &vcpu->arch.fpscr);
 235                 val = *((u32*)tmp);
 236                 len = sizeof(u32);
 237                 break;
 238         case FPU_LS_SINGLE_LOW:
 239                 *((u32*)tmp) = vcpu->arch.fpr[rs];
 240                 val = vcpu->arch.fpr[rs] & 0xffffffff;
 241                 len = sizeof(u32);
 242                 break;
 243         case FPU_LS_DOUBLE:
 244                 *((u64*)tmp) = vcpu->arch.fpr[rs];
 245                 val = vcpu->arch.fpr[rs];
 246                 len = sizeof(u64);
 247                 break;
 248         default:
 249                 val = 0;
 250                 len = 0;
 251         }
 252
 253         r = kvmppc_st(vcpu, &addr, len, tmp, true);
 254         vcpu->arch.paddr_accessed = addr;
 255         if (r < 0) {
 256                 kvmppc_inject_pf(vcpu, addr, true);
 257         } else if (r == EMULATE_DO_MMIO) {
 258                 emulated = kvmppc_handle_store(run, vcpu, val, len, 1);
 259         } else {
 260                 emulated = EMULATE_DONE;
 261         }
 262
 263         dprintk(KERN_INFO "KVM: FPR_ST [0x%llx] at 0x%lx (%d)\n",
 264                           val, addr, len);
 265
 266         return emulated;
 267 }
 268
 269 static int kvmppc_emulate_psq_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 270                                    int rs, ulong addr, bool w, int i)
 271 {
 272         int emulated = EMULATE_FAIL;
 273         int r;
 274         float one = 1.0;
 275         u32 tmp[2];
 276
 277         /* read from memory */
 278         if (w) {
 279                 r = kvmppc_ld(vcpu, &addr, sizeof(u32), tmp, true);
 280                 memcpy(&tmp[1], &one, sizeof(u32));
 281         } else {
 282                 r = kvmppc_ld(vcpu, &addr, sizeof(u32) * 2, tmp, true);
 283         }
 284         vcpu->arch.paddr_accessed = addr;
 285         if (r < 0) {
 286                 kvmppc_inject_pf(vcpu, addr, false);
 287                 goto done_load;
 288         } else if ((r == EMULATE_DO_MMIO) && w) {
 289                 emulated = kvmppc_handle_load(run, vcpu, KVM_REG_FPR | rs, 4, 1);
 290                 vcpu->arch.qpr[rs] = tmp[1];
 291                 goto done_load;
 292         } else if (r == EMULATE_DO_MMIO) {
 293                 emulated = kvmppc_handle_load(run, vcpu, KVM_REG_FQPR | rs, 8, 1);
 294                 goto done_load;
 295         }
 296
 297         emulated = EMULATE_DONE;
 298
 299         /* put in registers */
 300         kvm_cvt_fd(&tmp[0], &vcpu->arch.fpr[rs], &vcpu->arch.fpscr);
 301         vcpu->arch.qpr[rs] = tmp[1];
 302
 303         dprintk(KERN_INFO "KVM: PSQ_LD [0x%x, 0x%x] at 0x%lx (%d)\n", tmp[0],
 304                           tmp[1], addr, w ? 4 : 8);
 305
 306 done_load:
 307         return emulated;
 308 }
 309
 310 static int kvmppc_emulate_psq_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 311                                     int rs, ulong addr, bool w, int i)
 312 {
 313         int emulated = EMULATE_FAIL;
 314         int r;
 315         u32 tmp[2];
 316         int len = w ? sizeof(u32) : sizeof(u64);
 317
 318         kvm_cvt_df(&vcpu->arch.fpr[rs], &tmp[0], &vcpu->arch.fpscr);
 319         tmp[1] = vcpu->arch.qpr[rs];
 320
 321         r = kvmppc_st(vcpu, &addr, len, tmp, true);
 322         vcpu->arch.paddr_accessed = addr;
 323         if (r < 0) {
 324                 kvmppc_inject_pf(vcpu, addr, true);
 325         } else if ((r == EMULATE_DO_MMIO) && w) {
 326                 emulated = kvmppc_handle_store(run, vcpu, tmp[0], 4, 1);
 327         } else if (r == EMULATE_DO_MMIO) {
 328                 u64 val = ((u64)tmp[0] << 32) | tmp[1];
 329                 emulated = kvmppc_handle_store(run, vcpu, val, 8, 1);
 330         } else {
 331                 emulated = EMULATE_DONE;
 332         }
 333
 334         dprintk(KERN_INFO "KVM: PSQ_ST [0x%x, 0x%x] at 0x%lx (%d)\n",
 335                           tmp[0], tmp[1], addr, len);
 336
 337         return emulated;
 338 }
 339
 340 /*
 341  * Cuts out inst bits with ordering according to spec.
 342  * That means the leftmost bit is zero. All given bits are included.
 343  */
 344 static inline u32 inst_get_field(u32 inst, int msb, int lsb)
 345 {
 346         return kvmppc_get_field(inst, msb + 32, lsb + 32);
 347 }
 348
 349 /*
 350  * Replaces inst bits with ordering according to spec.
 351  */
 352 static inline u32 inst_set_field(u32 inst, int msb, int lsb, int value)
 353 {
 354         return kvmppc_set_field(inst, msb + 32, lsb + 32, value);
 355 }
 356
 357 bool kvmppc_inst_is_paired_single(struct kvm_vcpu *vcpu, u32 inst)
 358 {
 359         if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
 360                 return false;
 361
 362         switch (get_op(inst)) {
 363         case OP_PSQ_L:
 364         case OP_PSQ_LU:
 365         case OP_PSQ_ST:
 366         case OP_PSQ_STU:
 367         case OP_LFS:
 368         case OP_LFSU:
 369         case OP_LFD:
 370         case OP_LFDU:
 371         case OP_STFS:
 372         case OP_STFSU:
 373         case OP_STFD:
 374         case OP_STFDU:
 375                 return true;
 376         case 4:
 377                 /* X form */
 378                 switch (inst_get_field(inst, 21, 30)) {
 379                 case OP_4X_PS_CMPU0:
 380                 case OP_4X_PSQ_LX:
 381                 case OP_4X_PS_CMPO0:
 382                 case OP_4X_PSQ_LUX:
 383                 case OP_4X_PS_NEG:
 384                 case OP_4X_PS_CMPU1:
 385                 case OP_4X_PS_MR:
 386                 case OP_4X_PS_CMPO1:
 387                 case OP_4X_PS_NABS:
 388                 case OP_4X_PS_ABS:
 389                 case OP_4X_PS_MERGE00:
 390                 case OP_4X_PS_MERGE01:
 391                 case OP_4X_PS_MERGE10:
 392                 case OP_4X_PS_MERGE11:
 393                         return true;
 394                 }
 395                 /* XW form */
 396                 switch (inst_get_field(inst, 25, 30)) {
 397                 case OP_4XW_PSQ_STX:
 398                 case OP_4XW_PSQ_STUX:
 399                         return true;
 400                 }
 401                 /* A form */
 402                 switch (inst_get_field(inst, 26, 30)) {
 403                 case OP_4A_PS_SUM1:
 404                 case OP_4A_PS_SUM0:
 405                 case OP_4A_PS_MULS0:
 406                 case OP_4A_PS_MULS1:
 407                 case OP_4A_PS_MADDS0:
 408                 case OP_4A_PS_MADDS1:
 409                 case OP_4A_PS_DIV:
 410                 case OP_4A_PS_SUB:
 411                 case OP_4A_PS_ADD:
 412                 case OP_4A_PS_SEL:
 413                 case OP_4A_PS_RES:
 414                 case OP_4A_PS_MUL:
 415                 case OP_4A_PS_RSQRTE:
 416                 case OP_4A_PS_MSUB:
 417                 case OP_4A_PS_MADD:
 418                 case OP_4A_PS_NMSUB:
 419                 case OP_4A_PS_NMADD:
 420                         return true;
 421                 }
 422                 break;
 423         case 59:
 424                 switch (inst_get_field(inst, 21, 30)) {
 425                 case OP_59_FADDS:
 426                 case OP_59_FSUBS:
 427                 case OP_59_FDIVS:
 428                 case OP_59_FRES:
 429                 case OP_59_FRSQRTES:
 430                         return true;
 431                 }
 432                 switch (inst_get_field(inst, 26, 30)) {
 433                 case OP_59_FMULS:
 434                 case OP_59_FMSUBS:
 435                 case OP_59_FMADDS:
 436                 case OP_59_FNMSUBS:
 437                 case OP_59_FNMADDS:
 438                         return true;
 439                 }
 440                 break;
 441         case 63:
 442                 switch (inst_get_field(inst, 21, 30)) {
 443                 case OP_63_MTFSB0:
 444                 case OP_63_MTFSB1:
 445                 case OP_63_MTFSF:
 446                 case OP_63_MTFSFI:
 447                 case OP_63_MCRFS:
 448                 case OP_63_MFFS:
 449                 case OP_63_FCMPU:
 450                 case OP_63_FCMPO:
 451                 case OP_63_FNEG:
 452                 case OP_63_FMR:
 453                 case OP_63_FABS:
 454                 case OP_63_FRSP:
 455                 case OP_63_FDIV:
 456                 case OP_63_FADD:
 457                 case OP_63_FSUB:
 458                 case OP_63_FCTIW:
 459                 case OP_63_FCTIWZ:
 460                 case OP_63_FRSQRTE:
 461                 case OP_63_FCPSGN:
 462                         return true;
 463                 }
 464                 switch (inst_get_field(inst, 26, 30)) {
 465                 case OP_63_FMUL:
 466                 case OP_63_FSEL:
 467                 case OP_63_FMSUB:
 468                 case OP_63_FMADD:
 469                 case OP_63_FNMSUB:
 470                 case OP_63_FNMADD:
 471                         return true;
 472                 }
 473                 break;
 474         case 31:
 475                 switch (inst_get_field(inst, 21, 30)) {
 476                 case OP_31_LFSX:
 477                 case OP_31_LFSUX:
 478                 case OP_31_LFDX:
 479                 case OP_31_LFDUX:
 480                 case OP_31_STFSX:
 481                 case OP_31_STFSUX:
 482                 case OP_31_STFX:
 483                 case OP_31_STFUX:
 484                 case OP_31_STFIWX:
 485                         return true;
 486                 }
 487                 break;
 488         }
 489
 490         return false;
 491 }
 492
 493 static int get_d_signext(u32 inst)
 494 {
 495         int d = inst & 0x8ff;
 496
 497         if (d & 0x800)
 498                 return -(d & 0x7ff);
 499
 500         return (d & 0x7ff);
 501 }
 502
 503 static int kvmppc_ps_three_in(struct kvm_vcpu *vcpu, bool rc,
 504                                       int reg_out, int reg_in1, int reg_in2,
 505                                       int reg_in3, int scalar,
 506                                       void (*func)(u64 *fpscr,
 507                                                  u32 *dst, u32 *src1,
 508                                                  u32 *src2, u32 *src3))
 509 {
 510         u32 *qpr = vcpu->arch.qpr;
 511         u64 *fpr = vcpu->arch.fpr;
 512         u32 ps0_out;
 513         u32 ps0_in1, ps0_in2, ps0_in3;
 514         u32 ps1_in1, ps1_in2, ps1_in3;
 515
 516         /* RC */
 517         WARN_ON(rc);
 518
 519         /* PS0 */
 520         kvm_cvt_df(&fpr[reg_in1], &ps0_in1, &vcpu->arch.fpscr);
 521         kvm_cvt_df(&fpr[reg_in2], &ps0_in2, &vcpu->arch.fpscr);
 522         kvm_cvt_df(&fpr[reg_in3], &ps0_in3, &vcpu->arch.fpscr);
 523
 524         if (scalar & SCALAR_LOW)
 525                 ps0_in2 = qpr[reg_in2];
 526
 527         func(&vcpu->arch.fpscr, &ps0_out, &ps0_in1, &ps0_in2, &ps0_in3);
 528
 529         dprintk(KERN_INFO "PS3 ps0 -> f(0x%x, 0x%x, 0x%x) = 0x%x\n",
 530                           ps0_in1, ps0_in2, ps0_in3, ps0_out);
 531
 532         if (!(scalar & SCALAR_NO_PS0))
 533                 kvm_cvt_fd(&ps0_out, &fpr[reg_out], &vcpu->arch.fpscr);
 534
 535         /* PS1 */
 536         ps1_in1 = qpr[reg_in1];
 537         ps1_in2 = qpr[reg_in2];
 538         ps1_in3 = qpr[reg_in3];
 539
 540         if (scalar & SCALAR_HIGH)
 541                 ps1_in2 = ps0_in2;
 542
 543         if (!(scalar & SCALAR_NO_PS1))
 544                 func(&vcpu->arch.fpscr, &qpr[reg_out], &ps1_in1, &ps1_in2, &ps1_in3);
 545
 546         dprintk(KERN_INFO "PS3 ps1 -> f(0x%x, 0x%x, 0x%x) = 0x%x\n",
 547                           ps1_in1, ps1_in2, ps1_in3, qpr[reg_out]);
 548
 549         return EMULATE_DONE;
 550 }
 551
 552 static int kvmppc_ps_two_in(struct kvm_vcpu *vcpu, bool rc,
 553                                     int reg_out, int reg_in1, int reg_in2,
 554                                     int scalar,
 555                                     void (*func)(u64 *fpscr,
 556                                                  u32 *dst, u32 *src1,
 557                                                  u32 *src2))
 558 {
 559         u32 *qpr = vcpu->arch.qpr;
 560         u64 *fpr = vcpu->arch.fpr;
 561         u32 ps0_out;
 562         u32 ps0_in1, ps0_in2;
 563         u32 ps1_out;
 564         u32 ps1_in1, ps1_in2;
 565
 566         /* RC */
 567         WARN_ON(rc);
 568
 569         /* PS0 */
 570         kvm_cvt_df(&fpr[reg_in1], &ps0_in1, &vcpu->arch.fpscr);
 571
 572         if (scalar & SCALAR_LOW)
 573                 ps0_in2 = qpr[reg_in2];
 574         else
 575                 kvm_cvt_df(&fpr[reg_in2], &ps0_in2, &vcpu->arch.fpscr);
 576
 577         func(&vcpu->arch.fpscr, &ps0_out, &ps0_in1, &ps0_in2);
 578
 579         if (!(scalar & SCALAR_NO_PS0)) {
 580                 dprintk(KERN_INFO "PS2 ps0 -> f(0x%x, 0x%x) = 0x%x\n",
 581                                   ps0_in1, ps0_in2, ps0_out);
 582
 583                 kvm_cvt_fd(&ps0_out, &fpr[reg_out], &vcpu->arch.fpscr);
 584         }
 585
 586         /* PS1 */
 587         ps1_in1 = qpr[reg_in1];
 588         ps1_in2 = qpr[reg_in2];
 589
 590         if (scalar & SCALAR_HIGH)
 591                 ps1_in2 = ps0_in2;
 592
 593         func(&vcpu->arch.fpscr, &ps1_out, &ps1_in1, &ps1_in2);
 594
 595         if (!(scalar & SCALAR_NO_PS1)) {
 596                 qpr[reg_out] = ps1_out;
 597
 598                 dprintk(KERN_INFO "PS2 ps1 -> f(0x%x, 0x%x) = 0x%x\n",
 599                                   ps1_in1, ps1_in2, qpr[reg_out]);
 600         }
 601
 602         return EMULATE_DONE;
 603 }
 604
 605 static int kvmppc_ps_one_in(struct kvm_vcpu *vcpu, bool rc,
 606                                     int reg_out, int reg_in,
 607                                     void (*func)(u64 *t,
 608                                                  u32 *dst, u32 *src1))
 609 {
 610         u32 *qpr = vcpu->arch.qpr;
 611         u64 *fpr = vcpu->arch.fpr;
 612         u32 ps0_out, ps0_in;
 613         u32 ps1_in;
 614
 615         /* RC */
 616         WARN_ON(rc);
 617
 618         /* PS0 */
 619         kvm_cvt_df(&fpr[reg_in], &ps0_in, &vcpu->arch.fpscr);
 620         func(&vcpu->arch.fpscr, &ps0_out, &ps0_in);
 621
 622         dprintk(KERN_INFO "PS1 ps0 -> f(0x%x) = 0x%x\n",
 623                           ps0_in, ps0_out);
 624
 625         kvm_cvt_fd(&ps0_out, &fpr[reg_out], &vcpu->arch.fpscr);
 626
 627         /* PS1 */
 628         ps1_in = qpr[reg_in];
 629         func(&vcpu->arch.fpscr, &qpr[reg_out], &ps1_in);
 630
 631         dprintk(KERN_INFO "PS1 ps1 -> f(0x%x) = 0x%x\n",
 632                           ps1_in, qpr[reg_out]);
 633
 634         return EMULATE_DONE;
 635 }
 636
 637 int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu)
 638 {
 639         u32 inst = kvmppc_get_last_inst(vcpu);
 640         enum emulation_result emulated = EMULATE_DONE;
 641
 642         int ax_rd = inst_get_field(inst, 6, 10);
 643         int ax_ra = inst_get_field(inst, 11, 15);
 644         int ax_rb = inst_get_field(inst, 16, 20);
 645         int ax_rc = inst_get_field(inst, 21, 25);
 646         short full_d = inst_get_field(inst, 16, 31);
 647
 648         u64 *fpr_d = &vcpu->arch.fpr[ax_rd];
 649         u64 *fpr_a = &vcpu->arch.fpr[ax_ra];
 650         u64 *fpr_b = &vcpu->arch.fpr[ax_rb];
 651         u64 *fpr_c = &vcpu->arch.fpr[ax_rc];
 652
 653         bool rcomp = (inst & 1) ? true : false;
 654         u32 cr = kvmppc_get_cr(vcpu);
 655 #ifdef DEBUG
 656         int i;
 657 #endif
 658
 659         if (!kvmppc_inst_is_paired_single(vcpu, inst))
 660                 return EMULATE_FAIL;
 661
 662         if (!(vcpu->arch.shared->msr & MSR_FP)) {
 663                 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL);
 664                 return EMULATE_AGAIN;
 665         }
 666
 667         kvmppc_giveup_ext(vcpu, MSR_FP);
 668         preempt_disable();
 669         enable_kernel_fp();
 670         /* Do we need to clear FE0 / FE1 here? Don't think so. */
 671
 672 #ifdef DEBUG
 673         for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) {
 674                 u32 f;
 675                 kvm_cvt_df(&vcpu->arch.fpr[i], &f, &vcpu->arch.fpscr);
 676                 dprintk(KERN_INFO "FPR[%d] = 0x%x / 0x%llx    QPR[%d] = 0x%x\n",
 677                         i, f, vcpu->arch.fpr[i], i, vcpu->arch.qpr[i]);
 678         }
 679 #endif
 680
 681         switch (get_op(inst)) {
 682         case OP_PSQ_L:
 683         {
 684                 ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
 685                 bool w = inst_get_field(inst, 16, 16) ? true : false;
 686                 int i = inst_get_field(inst, 17, 19);
 687
 688                 addr += get_d_signext(inst);
 689                 emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
 690                 break;
 691         }
 692         case OP_PSQ_LU:
 693         {
 694                 ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
 695                 bool w = inst_get_field(inst, 16, 16) ? true : false;
 696                 int i = inst_get_field(inst, 17, 19);
 697
 698                 addr += get_d_signext(inst);
 699                 emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
 700
 701                 if (emulated == EMULATE_DONE)
 702                         kvmppc_set_gpr(vcpu, ax_ra, addr);
 703                 break;
 704         }
 705         case OP_PSQ_ST:
 706         {
 707                 ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
 708                 bool w = inst_get_field(inst, 16, 16) ? true : false;
 709                 int i = inst_get_field(inst, 17, 19);
 710
 711                 addr += get_d_signext(inst);
 712                 emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
 713                 break;
 714         }
 715         case OP_PSQ_STU:
 716         {
 717                 ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
 718                 bool w = inst_get_field(inst, 16, 16) ? true : false;
 719                 int i = inst_get_field(inst, 17, 19);
 720
 721                 addr += get_d_signext(inst);
 722                 emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
 723
 724                 if (emulated == EMULATE_DONE)
 725                         kvmppc_set_gpr(vcpu, ax_ra, addr);
 726                 break;
 727         }
 728         case 4:
 729                 /* X form */
 730                 switch (inst_get_field(inst, 21, 30)) {
 731                 case OP_4X_PS_CMPU0:
 732                         /* XXX */
 733                         emulated = EMULATE_FAIL;
 734                         break;
 735                 case OP_4X_PSQ_LX:
 736                 {
 737                         ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
 738                         bool w = inst_get_field(inst, 21, 21) ? true : false;
 739                         int i = inst_get_field(inst, 22, 24);
 740
 741                         addr += kvmppc_get_gpr(vcpu, ax_rb);
 742                         emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
 743                         break;
 744                 }
 745                 case OP_4X_PS_CMPO0:
 746                         /* XXX */
 747                         emulated = EMULATE_FAIL;
 748                         break;
 749                 case OP_4X_PSQ_LUX:
 750                 {
 751                         ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
 752                         bool w = inst_get_field(inst, 21, 21) ? true : false;
 753                         int i = inst_get_field(inst, 22, 24);
 754
 755                         addr += kvmppc_get_gpr(vcpu, ax_rb);
 756                         emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
 757
 758                         if (emulated == EMULATE_DONE)
 759                                 kvmppc_set_gpr(vcpu, ax_ra, addr);
 760                         break;
 761                 }
 762                 case OP_4X_PS_NEG:
 763                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
 764                         vcpu->arch.fpr[ax_rd] ^= 0x8000000000000000ULL;
 765                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
 766                         vcpu->arch.qpr[ax_rd] ^= 0x80000000;
 767                         break;
 768                 case OP_4X_PS_CMPU1:
 769                         /* XXX */
 770                         emulated = EMULATE_FAIL;
 771                         break;
 772                 case OP_4X_PS_MR:
 773                         WARN_ON(rcomp);
 774                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
 775                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
 776                         break;
 777                 case OP_4X_PS_CMPO1:
 778                         /* XXX */
 779                         emulated = EMULATE_FAIL;
 780                         break;
 781                 case OP_4X_PS_NABS:
 782                         WARN_ON(rcomp);
 783                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
 784                         vcpu->arch.fpr[ax_rd] |= 0x8000000000000000ULL;
 785                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
 786                         vcpu->arch.qpr[ax_rd] |= 0x80000000;
 787                         break;
 788                 case OP_4X_PS_ABS:
 789                         WARN_ON(rcomp);
 790                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
 791                         vcpu->arch.fpr[ax_rd] &= ~0x8000000000000000ULL;
 792                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
 793                         vcpu->arch.qpr[ax_rd] &= ~0x80000000;
 794                         break;
 795                 case OP_4X_PS_MERGE00:
 796                         WARN_ON(rcomp);
 797                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_ra];
 798                         /* vcpu->arch.qpr[ax_rd] = vcpu->arch.fpr[ax_rb]; */
 799                         kvm_cvt_df(&vcpu->arch.fpr[ax_rb],
 800                                    &vcpu->arch.qpr[ax_rd],
 801                                    &vcpu->arch.fpscr);
 802                         break;
 803                 case OP_4X_PS_MERGE01:
 804                         WARN_ON(rcomp);
 805                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_ra];
 806                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
 807                         break;
 808                 case OP_4X_PS_MERGE10:
 809                         WARN_ON(rcomp);
 810                         /* vcpu->arch.fpr[ax_rd] = vcpu->arch.qpr[ax_ra]; */
 811                         kvm_cvt_fd(&vcpu->arch.qpr[ax_ra],
 812                                    &vcpu->arch.fpr[ax_rd],
 813                                    &vcpu->arch.fpscr);
 814                         /* vcpu->arch.qpr[ax_rd] = vcpu->arch.fpr[ax_rb]; */
 815                         kvm_cvt_df(&vcpu->arch.fpr[ax_rb],
 816                                    &vcpu->arch.qpr[ax_rd],
 817                                    &vcpu->arch.fpscr);
 818                         break;
 819                 case OP_4X_PS_MERGE11:
 820                         WARN_ON(rcomp);
 821                         /* vcpu->arch.fpr[ax_rd] = vcpu->arch.qpr[ax_ra]; */
 822                         kvm_cvt_fd(&vcpu->arch.qpr[ax_ra],
 823                                    &vcpu->arch.fpr[ax_rd],
 824                                    &vcpu->arch.fpscr);
 825                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
 826                         break;
 827                 }
 828                 /* XW form */
 829                 switch (inst_get_field(inst, 25, 30)) {
 830                 case OP_4XW_PSQ_STX:
 831                 {
 832                         ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
 833                         bool w = inst_get_field(inst, 21, 21) ? true : false;
 834                         int i = inst_get_field(inst, 22, 24);
 835
 836                         addr += kvmppc_get_gpr(vcpu, ax_rb);
 837                         emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
 838                         break;
 839                 }
 840                 case OP_4XW_PSQ_STUX:
 841                 {
 842                         ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
 843                         bool w = inst_get_field(inst, 21, 21) ? true : false;
 844                         int i = inst_get_field(inst, 22, 24);
 845
 846                         addr += kvmppc_get_gpr(vcpu, ax_rb);
 847                         emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
 848
 849                         if (emulated == EMULATE_DONE)
 850                                 kvmppc_set_gpr(vcpu, ax_ra, addr);
 851                         break;
 852                 }
 853                 }
 854                 /* A form */
 855                 switch (inst_get_field(inst, 26, 30)) {
 856                 case OP_4A_PS_SUM1:
 857                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 858                                         ax_rb, ax_ra, SCALAR_NO_PS0 | SCALAR_HIGH, fps_fadds);
 859                         vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rc];
 860                         break;
 861                 case OP_4A_PS_SUM0:
 862                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 863                                         ax_ra, ax_rb, SCALAR_NO_PS1 | SCALAR_LOW, fps_fadds);
 864                         vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rc];
 865                         break;
 866                 case OP_4A_PS_MULS0:
 867                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 868                                         ax_ra, ax_rc, SCALAR_HIGH, fps_fmuls);
 869                         break;
 870                 case OP_4A_PS_MULS1:
 871                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 872                                         ax_ra, ax_rc, SCALAR_LOW, fps_fmuls);
 873                         break;
 874                 case OP_4A_PS_MADDS0:
 875                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 876                                         ax_ra, ax_rc, ax_rb, SCALAR_HIGH, fps_fmadds);
 877                         break;
 878                 case OP_4A_PS_MADDS1:
 879                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 880                                         ax_ra, ax_rc, ax_rb, SCALAR_LOW, fps_fmadds);
 881                         break;
 882                 case OP_4A_PS_DIV:
 883                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 884                                         ax_ra, ax_rb, SCALAR_NONE, fps_fdivs);
 885                         break;
 886                 case OP_4A_PS_SUB:
 887                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 888                                         ax_ra, ax_rb, SCALAR_NONE, fps_fsubs);
 889                         break;
 890                 case OP_4A_PS_ADD:
 891                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 892                                         ax_ra, ax_rb, SCALAR_NONE, fps_fadds);
 893                         break;
 894                 case OP_4A_PS_SEL:
 895                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 896                                         ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fsel);
 897                         break;
 898                 case OP_4A_PS_RES:
 899                         emulated = kvmppc_ps_one_in(vcpu, rcomp, ax_rd,
 900                                         ax_rb, fps_fres);
 901                         break;
 902                 case OP_4A_PS_MUL:
 903                         emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
 904                                         ax_ra, ax_rc, SCALAR_NONE, fps_fmuls);
 905                         break;
 906                 case OP_4A_PS_RSQRTE:
 907                         emulated = kvmppc_ps_one_in(vcpu, rcomp, ax_rd,
 908                                         ax_rb, fps_frsqrte);
 909                         break;
 910                 case OP_4A_PS_MSUB:
 911                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 912                                         ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fmsubs);
 913                         break;
 914                 case OP_4A_PS_MADD:
 915                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 916                                         ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fmadds);
 917                         break;
 918                 case OP_4A_PS_NMSUB:
 919                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 920                                         ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fnmsubs);
 921                         break;
 922                 case OP_4A_PS_NMADD:
 923                         emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
 924                                         ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fnmadds);
 925                         break;
 926                 }
 927                 break;
 928
 929         /* Real FPU operations */
 930
 931         case OP_LFS:
 932         {
 933                 ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
 934
 935                 emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
 936                                                    FPU_LS_SINGLE);
 937                 break;
 938         }
 939         case OP_LFSU:
 940         {
 941                 ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
 942
 943                 emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
 944                                                    FPU_LS_SINGLE);
 945
 946                 if (emulated == EMULATE_DONE)
 947                         kvmppc_set_gpr(vcpu, ax_ra, addr);
 948                 break;
 949         }
 950         case OP_LFD:
 951         {
 952                 ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
 953
 954                 emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
 955                                                    FPU_LS_DOUBLE);
 956                 break;
 957         }
 958         case OP_LFDU:
 959         {
 960                 ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
 961
 962                 emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
 963                                                    FPU_LS_DOUBLE);
 964
 965                 if (emulated == EMULATE_DONE)
 966                         kvmppc_set_gpr(vcpu, ax_ra, addr);
 967                 break;
 968         }
 969         case OP_STFS:
 970         {
 971                 ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
 972
 973                 emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
 974                                                     FPU_LS_SINGLE);
 975                 break;
 976         }
 977         case OP_STFSU:
 978         {
 979                 ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
 980
 981                 emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
 982                                                     FPU_LS_SINGLE);
 983
 984                 if (emulated == EMULATE_DONE)
 985                         kvmppc_set_gpr(vcpu, ax_ra, addr);
 986                 break;
 987         }
 988         case OP_STFD:
 989         {
 990                 ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
 991
 992                 emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
 993                                                     FPU_LS_DOUBLE);
 994                 break;
 995         }
 996         case OP_STFDU:
 997         {
 998                 ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
 999
1000                 emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
1001                                                     FPU_LS_DOUBLE);
1002
1003                 if (emulated == EMULATE_DONE)
1004                         kvmppc_set_gpr(vcpu, ax_ra, addr);
1005                 break;
1006         }
1007         case 31:
1008                 switch (inst_get_field(inst, 21, 30)) {
1009                 case OP_31_LFSX:
1010                 {
1011                         ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
1012
1013                         addr += kvmppc_get_gpr(vcpu, ax_rb);
1014                         emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
1015                                                            addr, FPU_LS_SINGLE);
1016                         break;
1017                 }
1018                 case OP_31_LFSUX:
1019                 {
1020                         ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
1021                                      kvmppc_get_gpr(vcpu, ax_rb);
1022
1023                         emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
1024                                                            addr, FPU_LS_SINGLE);
1025
1026                         if (emulated == EMULATE_DONE)
1027                                 kvmppc_set_gpr(vcpu, ax_ra, addr);
1028                         break;
1029                 }
1030                 case OP_31_LFDX:
1031                 {
1032                         ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
1033                                      kvmppc_get_gpr(vcpu, ax_rb);
1034
1035                         emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
1036                                                            addr, FPU_LS_DOUBLE);
1037                         break;
1038                 }
1039                 case OP_31_LFDUX:
1040                 {
1041                         ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
1042                                      kvmppc_get_gpr(vcpu, ax_rb);
1043
1044                         emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
1045                                                            addr, FPU_LS_DOUBLE);
1046
1047                         if (emulated == EMULATE_DONE)
1048                                 kvmppc_set_gpr(vcpu, ax_ra, addr);
1049                         break;
1050                 }
1051                 case OP_31_STFSX:
1052                 {
1053                         ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
1054                                      kvmppc_get_gpr(vcpu, ax_rb);
1055
1056                         emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
1057                                                             addr, FPU_LS_SINGLE);
1058                         break;
1059                 }
1060                 case OP_31_STFSUX:
1061                 {
1062                         ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
1063                                      kvmppc_get_gpr(vcpu, ax_rb);
1064
1065                         emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
1066                                                             addr, FPU_LS_SINGLE);
1067
1068                         if (emulated == EMULATE_DONE)
1069                                 kvmppc_set_gpr(vcpu, ax_ra, addr);
1070                         break;
1071                 }
1072                 case OP_31_STFX:
1073                 {
1074                         ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
1075                                      kvmppc_get_gpr(vcpu, ax_rb);
1076
1077                         emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
1078                                                             addr, FPU_LS_DOUBLE);
1079                         break;
1080                 }
1081                 case OP_31_STFUX:
1082                 {
1083                         ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
1084                                      kvmppc_get_gpr(vcpu, ax_rb);
1085
1086                         emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
1087                                                             addr, FPU_LS_DOUBLE);
1088
1089                         if (emulated == EMULATE_DONE)
1090                                 kvmppc_set_gpr(vcpu, ax_ra, addr);
1091                         break;
1092                 }
1093                 case OP_31_STFIWX:
1094                 {
1095                         ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
1096                                      kvmppc_get_gpr(vcpu, ax_rb);
1097
1098                         emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
1099                                                             addr,
1100                                                             FPU_LS_SINGLE_LOW);
1101                         break;
1102                 }
1103                         break;
1104                 }
1105                 break;
1106         case 59:
1107                 switch (inst_get_field(inst, 21, 30)) {
1108                 case OP_59_FADDS:
1109                         fpd_fadds(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1110                         kvmppc_sync_qpr(vcpu, ax_rd);
1111                         break;
1112                 case OP_59_FSUBS:
1113                         fpd_fsubs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1114                         kvmppc_sync_qpr(vcpu, ax_rd);
1115                         break;
1116                 case OP_59_FDIVS:
1117                         fpd_fdivs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1118                         kvmppc_sync_qpr(vcpu, ax_rd);
1119                         break;
1120                 case OP_59_FRES:
1121                         fpd_fres(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1122                         kvmppc_sync_qpr(vcpu, ax_rd);
1123                         break;
1124                 case OP_59_FRSQRTES:
1125                         fpd_frsqrtes(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1126                         kvmppc_sync_qpr(vcpu, ax_rd);
1127                         break;
1128                 }
1129                 switch (inst_get_field(inst, 26, 30)) {
1130                 case OP_59_FMULS:
1131                         fpd_fmuls(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c);
1132                         kvmppc_sync_qpr(vcpu, ax_rd);
1133                         break;
1134                 case OP_59_FMSUBS:
1135                         fpd_fmsubs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1136                         kvmppc_sync_qpr(vcpu, ax_rd);
1137                         break;
1138                 case OP_59_FMADDS:
1139                         fpd_fmadds(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1140                         kvmppc_sync_qpr(vcpu, ax_rd);
1141                         break;
1142                 case OP_59_FNMSUBS:
1143                         fpd_fnmsubs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1144                         kvmppc_sync_qpr(vcpu, ax_rd);
1145                         break;
1146                 case OP_59_FNMADDS:
1147                         fpd_fnmadds(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1148                         kvmppc_sync_qpr(vcpu, ax_rd);
1149                         break;
1150                 }
1151                 break;
1152         case 63:
1153                 switch (inst_get_field(inst, 21, 30)) {
1154                 case OP_63_MTFSB0:
1155                 case OP_63_MTFSB1:
1156                 case OP_63_MCRFS:
1157                 case OP_63_MTFSFI:
1158                         /* XXX need to implement */
1159                         break;
1160                 case OP_63_MFFS:
1161                         /* XXX missing CR */
1162                         *fpr_d = vcpu->arch.fpscr;
1163                         break;
1164                 case OP_63_MTFSF:
1165                         /* XXX missing fm bits */
1166                         /* XXX missing CR */
1167                         vcpu->arch.fpscr = *fpr_b;
1168                         break;
1169                 case OP_63_FCMPU:
1170                 {
1171                         u32 tmp_cr;
1172                         u32 cr0_mask = 0xf0000000;
1173                         u32 cr_shift = inst_get_field(inst, 6, 8) * 4;
1174
1175                         fpd_fcmpu(&vcpu->arch.fpscr, &tmp_cr, fpr_a, fpr_b);
1176                         cr &= ~(cr0_mask >> cr_shift);
1177                         cr |= (cr & cr0_mask) >> cr_shift;
1178                         break;
1179                 }
1180                 case OP_63_FCMPO:
1181                 {
1182                         u32 tmp_cr;
1183                         u32 cr0_mask = 0xf0000000;
1184                         u32 cr_shift = inst_get_field(inst, 6, 8) * 4;
1185
1186                         fpd_fcmpo(&vcpu->arch.fpscr, &tmp_cr, fpr_a, fpr_b);
1187                         cr &= ~(cr0_mask >> cr_shift);
1188                         cr |= (cr & cr0_mask) >> cr_shift;
1189                         break;
1190                 }
1191                 case OP_63_FNEG:
1192                         fpd_fneg(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1193                         break;
1194                 case OP_63_FMR:
1195                         *fpr_d = *fpr_b;
1196                         break;
1197                 case OP_63_FABS:
1198                         fpd_fabs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1199                         break;
1200                 case OP_63_FCPSGN:
1201                         fpd_fcpsgn(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1202                         break;
1203                 case OP_63_FDIV:
1204                         fpd_fdiv(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1205                         break;
1206                 case OP_63_FADD:
1207                         fpd_fadd(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1208                         break;
1209                 case OP_63_FSUB:
1210                         fpd_fsub(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
1211                         break;
1212                 case OP_63_FCTIW:
1213                         fpd_fctiw(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1214                         break;
1215                 case OP_63_FCTIWZ:
1216                         fpd_fctiwz(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1217                         break;
1218                 case OP_63_FRSP:
1219                         fpd_frsp(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1220                         kvmppc_sync_qpr(vcpu, ax_rd);
1221                         break;
1222                 case OP_63_FRSQRTE:
1223                 {
1224                         double one = 1.0f;
1225
1226                         /* fD = sqrt(fB) */
1227                         fpd_fsqrt(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
1228                         /* fD = 1.0f / fD */
1229                         fpd_fdiv(&vcpu->arch.fpscr, &cr, fpr_d, (u64*)&one, fpr_d);
1230                         break;
1231                 }
1232                 }
1233                 switch (inst_get_field(inst, 26, 30)) {
1234                 case OP_63_FMUL:
1235                         fpd_fmul(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c);
1236                         break;
1237                 case OP_63_FSEL:
1238                         fpd_fsel(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1239                         break;
1240                 case OP_63_FMSUB:
1241                         fpd_fmsub(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1242                         break;
1243                 case OP_63_FMADD:
1244                         fpd_fmadd(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1245                         break;
1246                 case OP_63_FNMSUB:
1247                         fpd_fnmsub(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1248                         break;
1249                 case OP_63_FNMADD:
1250                         fpd_fnmadd(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
1251                         break;
1252                 }
1253                 break;
1254         }
1255
1256 #ifdef DEBUG
1257         for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) {
1258                 u32 f;
1259                 kvm_cvt_df(&vcpu->arch.fpr[i], &f, &vcpu->arch.fpscr);
1260                 dprintk(KERN_INFO "FPR[%d] = 0x%x\n", i, f);
1261         }
1262 #endif
1263
1264         if (rcomp)
1265                 kvmppc_set_cr(vcpu, cr);
1266
1267         preempt_enable();
1268
1269         return emulated;
1270 }