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-rw-r--r--target/i386/xsave_helper.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/target/i386/xsave_helper.c b/target/i386/xsave_helper.c
new file mode 100644
index 000000000..ac61a9634
--- /dev/null
+++ b/target/i386/xsave_helper.c
@@ -0,0 +1,251 @@
+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include "qemu/osdep.h"
+
+#include "cpu.h"
+
+void x86_cpu_xsave_all_areas(X86CPU *cpu, void *buf, uint32_t buflen)
+{
+ CPUX86State *env = &cpu->env;
+ const ExtSaveArea *e, *f;
+ int i;
+
+ X86LegacyXSaveArea *legacy;
+ X86XSaveHeader *header;
+ uint16_t cwd, swd, twd;
+
+ memset(buf, 0, buflen);
+
+ e = &x86_ext_save_areas[XSTATE_FP_BIT];
+
+ legacy = buf + e->offset;
+ header = buf + e->offset + sizeof(*legacy);
+
+ twd = 0;
+ swd = env->fpus & ~(7 << 11);
+ swd |= (env->fpstt & 7) << 11;
+ cwd = env->fpuc;
+ for (i = 0; i < 8; ++i) {
+ twd |= (!env->fptags[i]) << i;
+ }
+ legacy->fcw = cwd;
+ legacy->fsw = swd;
+ legacy->ftw = twd;
+ legacy->fpop = env->fpop;
+ legacy->fpip = env->fpip;
+ legacy->fpdp = env->fpdp;
+ memcpy(&legacy->fpregs, env->fpregs,
+ sizeof(env->fpregs));
+ legacy->mxcsr = env->mxcsr;
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ uint8_t *xmm = legacy->xmm_regs[i];
+
+ stq_p(xmm, env->xmm_regs[i].ZMM_Q(0));
+ stq_p(xmm + 8, env->xmm_regs[i].ZMM_Q(1));
+ }
+
+ header->xstate_bv = env->xstate_bv;
+
+ e = &x86_ext_save_areas[XSTATE_YMM_BIT];
+ if (e->size && e->offset) {
+ XSaveAVX *avx;
+
+ avx = buf + e->offset;
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ uint8_t *ymmh = avx->ymmh[i];
+
+ stq_p(ymmh, env->xmm_regs[i].ZMM_Q(2));
+ stq_p(ymmh + 8, env->xmm_regs[i].ZMM_Q(3));
+ }
+ }
+
+ e = &x86_ext_save_areas[XSTATE_BNDREGS_BIT];
+ if (e->size && e->offset) {
+ XSaveBNDREG *bndreg;
+ XSaveBNDCSR *bndcsr;
+
+ f = &x86_ext_save_areas[XSTATE_BNDCSR_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ bndreg = buf + e->offset;
+ bndcsr = buf + f->offset;
+
+ memcpy(&bndreg->bnd_regs, env->bnd_regs,
+ sizeof(env->bnd_regs));
+ bndcsr->bndcsr = env->bndcs_regs;
+ }
+
+ e = &x86_ext_save_areas[XSTATE_OPMASK_BIT];
+ if (e->size && e->offset) {
+ XSaveOpmask *opmask;
+ XSaveZMM_Hi256 *zmm_hi256;
+#ifdef TARGET_X86_64
+ XSaveHi16_ZMM *hi16_zmm;
+#endif
+
+ f = &x86_ext_save_areas[XSTATE_ZMM_Hi256_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ opmask = buf + e->offset;
+ zmm_hi256 = buf + f->offset;
+
+ memcpy(&opmask->opmask_regs, env->opmask_regs,
+ sizeof(env->opmask_regs));
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ uint8_t *zmmh = zmm_hi256->zmm_hi256[i];
+
+ stq_p(zmmh, env->xmm_regs[i].ZMM_Q(4));
+ stq_p(zmmh + 8, env->xmm_regs[i].ZMM_Q(5));
+ stq_p(zmmh + 16, env->xmm_regs[i].ZMM_Q(6));
+ stq_p(zmmh + 24, env->xmm_regs[i].ZMM_Q(7));
+ }
+
+#ifdef TARGET_X86_64
+ f = &x86_ext_save_areas[XSTATE_Hi16_ZMM_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ hi16_zmm = buf + f->offset;
+
+ memcpy(&hi16_zmm->hi16_zmm, &env->xmm_regs[16],
+ 16 * sizeof(env->xmm_regs[16]));
+#endif
+ }
+
+#ifdef TARGET_X86_64
+ e = &x86_ext_save_areas[XSTATE_PKRU_BIT];
+ if (e->size && e->offset) {
+ XSavePKRU *pkru = buf + e->offset;
+
+ memcpy(pkru, &env->pkru, sizeof(env->pkru));
+ }
+#endif
+}
+
+void x86_cpu_xrstor_all_areas(X86CPU *cpu, const void *buf, uint32_t buflen)
+{
+ CPUX86State *env = &cpu->env;
+ const ExtSaveArea *e, *f, *g;
+ int i;
+
+ const X86LegacyXSaveArea *legacy;
+ const X86XSaveHeader *header;
+ uint16_t cwd, swd, twd;
+
+ e = &x86_ext_save_areas[XSTATE_FP_BIT];
+
+ legacy = buf + e->offset;
+ header = buf + e->offset + sizeof(*legacy);
+
+ cwd = legacy->fcw;
+ swd = legacy->fsw;
+ twd = legacy->ftw;
+ env->fpop = legacy->fpop;
+ env->fpstt = (swd >> 11) & 7;
+ env->fpus = swd;
+ env->fpuc = cwd;
+ for (i = 0; i < 8; ++i) {
+ env->fptags[i] = !((twd >> i) & 1);
+ }
+ env->fpip = legacy->fpip;
+ env->fpdp = legacy->fpdp;
+ env->mxcsr = legacy->mxcsr;
+ memcpy(env->fpregs, &legacy->fpregs,
+ sizeof(env->fpregs));
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ const uint8_t *xmm = legacy->xmm_regs[i];
+
+ env->xmm_regs[i].ZMM_Q(0) = ldq_p(xmm);
+ env->xmm_regs[i].ZMM_Q(1) = ldq_p(xmm + 8);
+ }
+
+ env->xstate_bv = header->xstate_bv;
+
+ e = &x86_ext_save_areas[XSTATE_YMM_BIT];
+ if (e->size && e->offset) {
+ const XSaveAVX *avx;
+
+ avx = buf + e->offset;
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ const uint8_t *ymmh = avx->ymmh[i];
+
+ env->xmm_regs[i].ZMM_Q(2) = ldq_p(ymmh);
+ env->xmm_regs[i].ZMM_Q(3) = ldq_p(ymmh + 8);
+ }
+ }
+
+ e = &x86_ext_save_areas[XSTATE_BNDREGS_BIT];
+ if (e->size && e->offset) {
+ const XSaveBNDREG *bndreg;
+ const XSaveBNDCSR *bndcsr;
+
+ f = &x86_ext_save_areas[XSTATE_BNDCSR_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ bndreg = buf + e->offset;
+ bndcsr = buf + f->offset;
+
+ memcpy(env->bnd_regs, &bndreg->bnd_regs,
+ sizeof(env->bnd_regs));
+ env->bndcs_regs = bndcsr->bndcsr;
+ }
+
+ e = &x86_ext_save_areas[XSTATE_OPMASK_BIT];
+ if (e->size && e->offset) {
+ const XSaveOpmask *opmask;
+ const XSaveZMM_Hi256 *zmm_hi256;
+#ifdef TARGET_X86_64
+ const XSaveHi16_ZMM *hi16_zmm;
+#endif
+
+ f = &x86_ext_save_areas[XSTATE_ZMM_Hi256_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ g = &x86_ext_save_areas[XSTATE_Hi16_ZMM_BIT];
+ assert(g->size);
+ assert(g->offset);
+
+ opmask = buf + e->offset;
+ zmm_hi256 = buf + f->offset;
+#ifdef TARGET_X86_64
+ hi16_zmm = buf + g->offset;
+#endif
+
+ memcpy(env->opmask_regs, &opmask->opmask_regs,
+ sizeof(env->opmask_regs));
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ const uint8_t *zmmh = zmm_hi256->zmm_hi256[i];
+
+ env->xmm_regs[i].ZMM_Q(4) = ldq_p(zmmh);
+ env->xmm_regs[i].ZMM_Q(5) = ldq_p(zmmh + 8);
+ env->xmm_regs[i].ZMM_Q(6) = ldq_p(zmmh + 16);
+ env->xmm_regs[i].ZMM_Q(7) = ldq_p(zmmh + 24);
+ }
+
+#ifdef TARGET_X86_64
+ memcpy(&env->xmm_regs[16], &hi16_zmm->hi16_zmm,
+ 16 * sizeof(env->xmm_regs[16]));
+#endif
+ }
+
+#ifdef TARGET_X86_64
+ e = &x86_ext_save_areas[XSTATE_PKRU_BIT];
+ if (e->size && e->offset) {
+ const XSavePKRU *pkru;
+
+ pkru = buf + e->offset;
+ memcpy(&env->pkru, pkru, sizeof(env->pkru));
+ }
+#endif
+}