target/i386/xsave_helper.c

   1 /*
   2  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   3  * See the COPYING file in the top-level directory.
   4  */
   5 #include "qemu/osdep.h"
   6
   7 #include "qemu-common.h"
   8 #include "cpu.h"
   9
  10 void x86_cpu_xsave_all_areas(X86CPU *cpu, X86XSaveArea *buf)
  11 {
  12     CPUX86State *env = &cpu->env;
  13     X86XSaveArea *xsave = buf;
  14
  15     uint16_t cwd, swd, twd;
  16     int i;
  17     memset(xsave, 0, sizeof(X86XSaveArea));
  18     twd = 0;
  19     swd = env->fpus & ~(7 << 11);
  20     swd |= (env->fpstt & 7) << 11;
  21     cwd = env->fpuc;
  22     for (i = 0; i < 8; ++i) {
  23         twd |= (!env->fptags[i]) << i;
  24     }
  25     xsave->legacy.fcw = cwd;
  26     xsave->legacy.fsw = swd;
  27     xsave->legacy.ftw = twd;
  28     xsave->legacy.fpop = env->fpop;
  29     xsave->legacy.fpip = env->fpip;
  30     xsave->legacy.fpdp = env->fpdp;
  31     memcpy(&xsave->legacy.fpregs, env->fpregs,
  32             sizeof env->fpregs);
  33     xsave->legacy.mxcsr = env->mxcsr;
  34     xsave->header.xstate_bv = env->xstate_bv;
  35     memcpy(&xsave->bndreg_state.bnd_regs, env->bnd_regs,
  36             sizeof env->bnd_regs);
  37     xsave->bndcsr_state.bndcsr = env->bndcs_regs;
  38     memcpy(&xsave->opmask_state.opmask_regs, env->opmask_regs,
  39             sizeof env->opmask_regs);
  40
  41     for (i = 0; i < CPU_NB_REGS; i++) {
  42         uint8_t *xmm = xsave->legacy.xmm_regs[i];
  43         uint8_t *ymmh = xsave->avx_state.ymmh[i];
  44         uint8_t *zmmh = xsave->zmm_hi256_state.zmm_hi256[i];
  45         stq_p(xmm,     env->xmm_regs[i].ZMM_Q(0));
  46         stq_p(xmm+8,   env->xmm_regs[i].ZMM_Q(1));
  47         stq_p(ymmh,    env->xmm_regs[i].ZMM_Q(2));
  48         stq_p(ymmh+8,  env->xmm_regs[i].ZMM_Q(3));
  49         stq_p(zmmh,    env->xmm_regs[i].ZMM_Q(4));
  50         stq_p(zmmh+8,  env->xmm_regs[i].ZMM_Q(5));
  51         stq_p(zmmh+16, env->xmm_regs[i].ZMM_Q(6));
  52         stq_p(zmmh+24, env->xmm_regs[i].ZMM_Q(7));
  53     }
  54
  55 #ifdef TARGET_X86_64
  56     memcpy(&xsave->hi16_zmm_state.hi16_zmm, &env->xmm_regs[16],
  57             16 * sizeof env->xmm_regs[16]);
  58     memcpy(&xsave->pkru_state, &env->pkru, sizeof env->pkru);
  59 #endif
  60
  61 }
  62
  63 void x86_cpu_xrstor_all_areas(X86CPU *cpu, const X86XSaveArea *buf)
  64 {
  65
  66     CPUX86State *env = &cpu->env;
  67     const X86XSaveArea *xsave = buf;
  68
  69     int i;
  70     uint16_t cwd, swd, twd;
  71     cwd = xsave->legacy.fcw;
  72     swd = xsave->legacy.fsw;
  73     twd = xsave->legacy.ftw;
  74     env->fpop = xsave->legacy.fpop;
  75     env->fpstt = (swd >> 11) & 7;
  76     env->fpus = swd;
  77     env->fpuc = cwd;
  78     for (i = 0; i < 8; ++i) {
  79         env->fptags[i] = !((twd >> i) & 1);
  80     }
  81     env->fpip = xsave->legacy.fpip;
  82     env->fpdp = xsave->legacy.fpdp;
  83     env->mxcsr = xsave->legacy.mxcsr;
  84     memcpy(env->fpregs, &xsave->legacy.fpregs,
  85             sizeof env->fpregs);
  86     env->xstate_bv = xsave->header.xstate_bv;
  87     memcpy(env->bnd_regs, &xsave->bndreg_state.bnd_regs,
  88             sizeof env->bnd_regs);
  89     env->bndcs_regs = xsave->bndcsr_state.bndcsr;
  90     memcpy(env->opmask_regs, &xsave->opmask_state.opmask_regs,
  91             sizeof env->opmask_regs);
  92
  93     for (i = 0; i < CPU_NB_REGS; i++) {
  94         const uint8_t *xmm = xsave->legacy.xmm_regs[i];
  95         const uint8_t *ymmh = xsave->avx_state.ymmh[i];
  96         const uint8_t *zmmh = xsave->zmm_hi256_state.zmm_hi256[i];
  97         env->xmm_regs[i].ZMM_Q(0) = ldq_p(xmm);
  98         env->xmm_regs[i].ZMM_Q(1) = ldq_p(xmm+8);
  99         env->xmm_regs[i].ZMM_Q(2) = ldq_p(ymmh);
 100         env->xmm_regs[i].ZMM_Q(3) = ldq_p(ymmh+8);
 101         env->xmm_regs[i].ZMM_Q(4) = ldq_p(zmmh);
 102         env->xmm_regs[i].ZMM_Q(5) = ldq_p(zmmh+8);
 103         env->xmm_regs[i].ZMM_Q(6) = ldq_p(zmmh+16);
 104         env->xmm_regs[i].ZMM_Q(7) = ldq_p(zmmh+24);
 105     }
 106
 107 #ifdef TARGET_X86_64
 108     memcpy(&env->xmm_regs[16], &xsave->hi16_zmm_state.hi16_zmm,
 109            16 * sizeof env->xmm_regs[16]);
 110     memcpy(&env->pkru, &xsave->pkru_state, sizeof env->pkru);
 111 #endif
 112
 113 }