--- a/hotspot/src/cpu/x86/vm/assembler_x86.cpp	Mon Dec 07 15:42:47 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/assembler_x86.cpp	Mon Dec 14 14:48:30 2015 -0800
@@ -2152,33 +2152,64 @@
   emit_int8(0xC0 | encode);
 }
 
-void Assembler::kmovwl(KRegister dst, Register src) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
+void Assembler::kmovbl(KRegister dst, Register src) {
+  assert(VM_Version::supports_avx512dq(), "");
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  emit_int8((unsigned char)0x92);
+  emit_int8((unsigned char)(0xC0 | encode));
+}
+
+void Assembler::kmovbl(Register dst, KRegister src) {
+  assert(VM_Version::supports_avx512dq(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(dst, knoreg, src, VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  emit_int8((unsigned char)0x93);
+  emit_int8((unsigned char)(0xC0 | encode));
+}
+
+void Assembler::kmovwl(KRegister dst, Register src) {
+  assert(VM_Version::supports_evex(), "");
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x92);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
+void Assembler::kmovwl(Register dst, KRegister src) {
+  assert(VM_Version::supports_evex(), "");
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
+  emit_int8((unsigned char)0x93);
+  emit_int8((unsigned char)(0xC0 | encode));
+}
+
 void Assembler::kmovdl(KRegister dst, Register src) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
-  VexSimdPrefix pre = !_legacy_mode_bw ? VEX_SIMD_F2 : VEX_SIMD_NONE;
+  assert(VM_Version::supports_avx512bw(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(dst, knoreg, src, pre, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x92);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
+void Assembler::kmovdl(Register dst, KRegister src) {
+  assert(VM_Version::supports_avx512bw(), "");
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
+  emit_int8((unsigned char)0x93);
+  emit_int8((unsigned char)(0xC0 | encode));
+}
+
 void Assembler::kmovql(KRegister dst, KRegister src) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
+  assert(VM_Version::supports_avx512bw(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(dst, knoreg, src, VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x90);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
 void Assembler::kmovql(KRegister dst, Address src) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
+  assert(VM_Version::supports_avx512bw(), "");
   InstructionMark im(this);
   InstructionAttr attributes(AVX_128bit, /* vex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
   vex_prefix(src, 0, dst->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
@@ -2187,7 +2218,7 @@
 }
 
 void Assembler::kmovql(Address dst, KRegister src) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
+  assert(VM_Version::supports_avx512bw(), "");
   InstructionMark im(this);
   InstructionAttr attributes(AVX_128bit, /* vex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
   vex_prefix(dst, 0, src->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
@@ -2196,46 +2227,53 @@
 }
 
 void Assembler::kmovql(KRegister dst, Register src) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
-  VexSimdPrefix pre = !_legacy_mode_bw ? VEX_SIMD_F2 : VEX_SIMD_NONE;
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ !_legacy_mode_bw, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(dst, knoreg, src, pre, VEX_OPCODE_0F, &attributes);
+  assert(VM_Version::supports_avx512bw(), "");
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x92);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
+void Assembler::kmovql(Register dst, KRegister src) {
+  assert(VM_Version::supports_avx512bw(), "");
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
+  int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
+  emit_int8((unsigned char)0x93);
+  emit_int8((unsigned char)(0xC0 | encode));
+}
+
 // This instruction produces ZF or CF flags
 void Assembler::kortestbl(KRegister src1, KRegister src2) {
-  NOT_LP64(assert(VM_Version::supports_avx512dq(), ""));
+  assert(VM_Version::supports_avx512dq(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(src1, knoreg, src2, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(src1->encoding(), 0, src2->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x98);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
 // This instruction produces ZF or CF flags
 void Assembler::kortestwl(KRegister src1, KRegister src2) {
-  NOT_LP64(assert(VM_Version::supports_evex(), ""));
+  assert(VM_Version::supports_evex(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(src1, knoreg, src2, VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(src1->encoding(), 0, src2->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x98);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
 // This instruction produces ZF or CF flags
 void Assembler::kortestdl(KRegister src1, KRegister src2) {
-  NOT_LP64(assert(VM_Version::supports_avx512bw(), ""));
+  assert(VM_Version::supports_avx512bw(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(src1, knoreg, src2, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(src1->encoding(), 0, src2->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x98);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
 // This instruction produces ZF or CF flags
 void Assembler::kortestql(KRegister src1, KRegister src2) {
-  NOT_LP64(assert(VM_Version::supports_avx512bw(), ""));
+  assert(VM_Version::supports_avx512bw(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ true, /* legacy_mode */ true, /* no_mask_reg */ true, /* uses_vl */ false);
-  int encode = kreg_prefix_and_encode(src1, knoreg, src2, VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
+  int encode = vex_prefix_and_encode(src1->encoding(), 0, src2->encoding(), VEX_SIMD_NONE, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0x98);
   emit_int8((unsigned char)(0xC0 | encode));
 }
@@ -2375,7 +2413,7 @@
 // Move Unaligned EVEX enabled Vector (programmable : 8,16,32,64)
 void Assembler::evmovdqub(XMMRegister dst, XMMRegister src, int vector_len) {
   assert(VM_Version::supports_evex(), "");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8(0x6F);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -2395,7 +2433,7 @@
   assert(VM_Version::supports_evex(), "");
   assert(src != xnoreg, "sanity");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   vex_prefix(dst, 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8(0x7F);
@@ -2404,7 +2442,7 @@
 
 void Assembler::evmovdquw(XMMRegister dst, XMMRegister src, int vector_len) {
   assert(VM_Version::supports_evex(), "");
-  InstructionAttr attributes(vector_len, /* vex_w */ true, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ true, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8(0x6F);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -2424,7 +2462,7 @@
   assert(VM_Version::supports_evex(), "");
   assert(src != xnoreg, "sanity");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ true, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ true, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   vex_prefix(dst, 0, src->encoding(), VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8(0x7F);
@@ -3069,7 +3107,7 @@
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
   assert((UseAVX > 0), "SSE mode requires address alignment 16 bytes");
   InstructionMark im(this);
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FV, /* input_size_in_bits */ EVEX_32bit);
   simd_prefix(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x67);
@@ -3078,7 +3116,7 @@
 
 void Assembler::packuswb(XMMRegister dst, XMMRegister src) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x67);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -3086,7 +3124,7 @@
 
 void Assembler::vpackuswb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(UseAVX > 0, "some form of AVX must be enabled");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x67);
@@ -3128,7 +3166,7 @@
 
 // In this context, the dst vector contains the components that are equal, non equal components are zeroed in dst
 void Assembler::pcmpeqb(XMMRegister dst, XMMRegister src) {
-  NOT_LP64(assert(VM_Version::supports_sse2(), ""));
+  assert(VM_Version::supports_sse2(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ false, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x74);
@@ -3148,16 +3186,28 @@
 // In this context, kdst is written the mask used to process the equal components
 void Assembler::evpcmpeqb(KRegister kdst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(VM_Version::supports_avx512bw(), "");
-  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(kdst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x74);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
+void Assembler::evpcmpeqb(KRegister kdst, XMMRegister nds, Address src, int vector_len) {
+  assert(VM_Version::supports_avx512bw(), "");
+  InstructionMark im(this);
+  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ true, /* uses_vl */ true);
+  attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
+  int nds_enc = nds->is_valid() ? nds->encoding() : 0;
+  int dst_enc = kdst->encoding();
+  vex_prefix(src, nds_enc, dst_enc, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  emit_int8(0x74);
+  emit_operand(as_Register(dst_enc), src);
+}
+
 // In this context, the dst vector contains the components that are equal, non equal components are zeroed in dst
 void Assembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
-  NOT_LP64(assert(VM_Version::supports_sse2(), ""));
+  assert(VM_Version::supports_sse2(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ false, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x75);
@@ -3177,16 +3227,28 @@
 // In this context, kdst is written the mask used to process the equal components
 void Assembler::evpcmpeqw(KRegister kdst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(VM_Version::supports_avx512bw(), "");
-  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(kdst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x75);
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
+void Assembler::evpcmpeqw(KRegister kdst, XMMRegister nds, Address src, int vector_len) {
+  assert(VM_Version::supports_avx512bw(), "");
+  InstructionMark im(this);
+  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ true, /* uses_vl */ true);
+  attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
+  int nds_enc = nds->is_valid() ? nds->encoding() : 0;
+  int dst_enc = kdst->encoding();
+  vex_prefix(src, nds_enc, dst_enc, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  emit_int8(0x75);
+  emit_operand(as_Register(dst_enc), src);
+}
+
 // In this context, the dst vector contains the components that are equal, non equal components are zeroed in dst
 void Assembler::pcmpeqd(XMMRegister dst, XMMRegister src) {
-  NOT_LP64(assert(VM_Version::supports_sse2(), ""));
+  assert(VM_Version::supports_sse2(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ false, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x76);
@@ -3213,9 +3275,21 @@
   emit_int8((unsigned char)(0xC0 | encode));
 }
 
+void Assembler::evpcmpeqd(KRegister kdst, XMMRegister nds, Address src, int vector_len) {
+  assert(VM_Version::supports_evex(), "");
+  InstructionMark im(this);
+  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ false, /* no_mask_reg */ false, /* uses_vl */ true);
+  attributes.set_address_attributes(/* tuple_type */ EVEX_FV, /* input_size_in_bits */ EVEX_32bit);
+  int nds_enc = nds->is_valid() ? nds->encoding() : 0;
+  int dst_enc = kdst->encoding();
+  vex_prefix(src, nds_enc, dst_enc, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
+  emit_int8(0x76);
+  emit_operand(as_Register(dst_enc), src);
+}
+
 // In this context, the dst vector contains the components that are equal, non equal components are zeroed in dst
 void Assembler::pcmpeqq(XMMRegister dst, XMMRegister src) {
-  NOT_LP64(assert(VM_Version::supports_sse4_1(), ""));
+  assert(VM_Version::supports_sse4_1(), "");
   InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ true, /* no_mask_reg */ false, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x29);
@@ -3328,7 +3402,7 @@
 void Assembler::pmovzxbw(XMMRegister dst, Address src) {
   assert(VM_Version::supports_sse4_1(), "");
   InstructionMark im(this);
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   attributes.set_address_attributes(/* tuple_type */ EVEX_HVM, /* input_size_in_bits */ EVEX_NObit);
   simd_prefix(dst, xnoreg, src, VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x30);
@@ -3337,7 +3411,7 @@
 
 void Assembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
   assert(VM_Version::supports_sse4_1(), "");
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, xnoreg, src, VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x30);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -3347,7 +3421,7 @@
   assert(VM_Version::supports_avx(), "");
   InstructionMark im(this);
   assert(dst != xnoreg, "sanity");
-  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(vector_len, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   attributes.set_address_attributes(/* tuple_type */ EVEX_HVM, /* input_size_in_bits */ EVEX_NObit);
   vex_prefix(src, 0, dst->encoding(), VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x30);
@@ -3452,7 +3526,7 @@
 
 void Assembler::pshufb(XMMRegister dst, XMMRegister src) {
   assert(VM_Version::supports_ssse3(), "");
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x00);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -3461,7 +3535,7 @@
 void Assembler::pshufb(XMMRegister dst, Address src) {
   assert(VM_Version::supports_ssse3(), "");
   InstructionMark im(this);
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   simd_prefix(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x00);
@@ -3495,7 +3569,7 @@
 void Assembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
   assert(isByte(mode), "invalid value");
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   int encode = simd_prefix_and_encode(dst, xnoreg, src, VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8(0x70);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -3507,7 +3581,7 @@
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
   assert((UseAVX > 0), "SSE mode requires address alignment 16 bytes");
   InstructionMark im(this);
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ false);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ false);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   simd_prefix(dst, xnoreg, src, VEX_SIMD_F2, VEX_OPCODE_0F, &attributes);
   emit_int8(0x70);
@@ -4723,7 +4797,7 @@
 
 void Assembler::paddb(XMMRegister dst, XMMRegister src) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xFC);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -4731,7 +4805,7 @@
 
 void Assembler::paddw(XMMRegister dst, XMMRegister src) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xFD);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -4771,7 +4845,7 @@
 
 void Assembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xFC);
@@ -4780,7 +4854,7 @@
 
 void Assembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xFD);
@@ -4808,7 +4882,7 @@
 void Assembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   vex_prefix(src, nds_enc, dst->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
@@ -4819,7 +4893,7 @@
 void Assembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   vex_prefix(src, nds_enc, dst->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
@@ -4851,7 +4925,7 @@
 
 void Assembler::psubb(XMMRegister dst, XMMRegister src) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xF8);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -4859,7 +4933,7 @@
 
 void Assembler::psubw(XMMRegister dst, XMMRegister src) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xF9);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -4882,7 +4956,7 @@
 
 void Assembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xF8);
@@ -4891,7 +4965,7 @@
 
 void Assembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xF9);
@@ -4919,7 +4993,7 @@
 void Assembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   vex_prefix(src, nds_enc, dst->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
@@ -4930,7 +5004,7 @@
 void Assembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   vex_prefix(src, nds_enc, dst->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
@@ -4962,7 +5036,7 @@
 
 void Assembler::pmullw(XMMRegister dst, XMMRegister src) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, src, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xD5);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -4978,7 +5052,7 @@
 
 void Assembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   int encode = vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xD5);
@@ -5006,7 +5080,7 @@
 void Assembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
   InstructionMark im(this);
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   attributes.set_address_attributes(/* tuple_type */ EVEX_FVM, /* input_size_in_bits */ EVEX_NObit);
   int nds_enc = nds->is_valid() ? nds->encoding() : 0;
   vex_prefix(src, nds_enc, dst->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
@@ -5039,7 +5113,7 @@
 // Shift packed integers left by specified number of bits.
 void Assembler::psllw(XMMRegister dst, int shift) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   // XMM6 is for /6 encoding: 66 0F 71 /6 ib
   int encode = simd_prefix_and_encode(xmm6, dst, dst, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x71);
@@ -5069,7 +5143,7 @@
 
 void Assembler::psllw(XMMRegister dst, XMMRegister shift) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, shift, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xF1);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -5093,7 +5167,7 @@
 
 void Assembler::vpsllw(XMMRegister dst, XMMRegister src, int shift, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   // XMM6 is for /6 encoding: 66 0F 71 /6 ib
   int encode = vex_prefix_and_encode(xmm6->encoding(), dst->encoding(), src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x71);
@@ -5124,7 +5198,7 @@
 
 void Assembler::vpsllw(XMMRegister dst, XMMRegister src, XMMRegister shift, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = vex_prefix_and_encode(dst->encoding(), src->encoding(), shift->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xF1);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -5149,7 +5223,7 @@
 // Shift packed integers logically right by specified number of bits.
 void Assembler::psrlw(XMMRegister dst, int shift) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   // XMM2 is for /2 encoding: 66 0F 71 /2 ib
   int encode = simd_prefix_and_encode(xmm2, dst, dst, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x71);
@@ -5181,7 +5255,7 @@
 
 void Assembler::psrlw(XMMRegister dst, XMMRegister shift) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, shift, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xD1);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -5205,7 +5279,7 @@
 
 void Assembler::vpsrlw(XMMRegister dst, XMMRegister src, int shift, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   // XMM2 is for /2 encoding: 66 0F 71 /2 ib
   int encode = vex_prefix_and_encode(xmm2->encoding(), dst->encoding(), src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x71);
@@ -5235,7 +5309,7 @@
 
 void Assembler::vpsrlw(XMMRegister dst, XMMRegister src, XMMRegister shift, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = vex_prefix_and_encode(dst->encoding(), src->encoding(), shift->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xD1);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -5260,7 +5334,7 @@
 // Shift packed integers arithmetically right by specified number of bits.
 void Assembler::psraw(XMMRegister dst, int shift) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   // XMM4 is for /4 encoding: 66 0F 71 /4 ib
   int encode = simd_prefix_and_encode(xmm4, dst, dst, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x71);
@@ -5280,7 +5354,7 @@
 
 void Assembler::psraw(XMMRegister dst, XMMRegister shift) {
   NOT_LP64(assert(VM_Version::supports_sse2(), ""));
-  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_128bit, /* rex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = simd_prefix_and_encode(dst, dst, shift, VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xE1);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -5296,7 +5370,7 @@
 
 void Assembler::vpsraw(XMMRegister dst, XMMRegister src, int shift, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   // XMM4 is for /4 encoding: 66 0F 71 /4 ib
   int encode = vex_prefix_and_encode(xmm4->encoding(), dst->encoding(), src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8(0x71);
@@ -5316,7 +5390,7 @@
 
 void Assembler::vpsraw(XMMRegister dst, XMMRegister src, XMMRegister shift, int vector_len) {
   assert(UseAVX > 0, "requires some form of AVX");
-  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(vector_len, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = vex_prefix_and_encode(dst->encoding(), src->encoding(), shift->encoding(), VEX_SIMD_66, VEX_OPCODE_0F, &attributes);
   emit_int8((unsigned char)0xE1);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -5706,7 +5780,7 @@
 // duplicate 2-bytes integer data from src into 16 locations in dest
 void Assembler::vpbroadcastw(XMMRegister dst, XMMRegister src) {
   assert(VM_Version::supports_avx2(), "");
-  InstructionAttr attributes(AVX_256bit, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ false, /* uses_vl */ true);
+  InstructionAttr attributes(AVX_256bit, /* vex_w */ false, /* legacy_mode */ _legacy_mode_bw, /* no_mask_reg */ true, /* uses_vl */ true);
   int encode = vex_prefix_and_encode(dst->encoding(), 0, src->encoding(), VEX_SIMD_66, VEX_OPCODE_0F_38, &attributes);
   emit_int8(0x79);
   emit_int8((unsigned char)(0xC0 | encode));
@@ -6573,18 +6647,6 @@
   }
 }
 
-int Assembler::kreg_prefix_and_encode(KRegister dst, KRegister nds, KRegister src, VexSimdPrefix pre,
-                                      VexOpcode opc, InstructionAttr *attributes) {
-  int nds_enc = nds->is_valid() ? nds->encoding() : 0;
-  return vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), pre, opc, attributes);
-}
-
-int Assembler::kreg_prefix_and_encode(KRegister dst, KRegister nds, Register src, VexSimdPrefix pre,
-                                      VexOpcode opc, InstructionAttr *attributes) {
-  int nds_enc = nds->is_valid() ? nds->encoding() : 0;
-  return vex_prefix_and_encode(dst->encoding(), nds_enc, src->encoding(), pre, opc, attributes);
-}
-
 void Assembler::cmppd(XMMRegister dst, XMMRegister nds, XMMRegister src, int cop, int vector_len) {
   assert(VM_Version::supports_avx(), "");
   assert(!VM_Version::supports_evex(), "");

--- a/hotspot/src/cpu/x86/vm/assembler_x86.hpp	Mon Dec 07 15:42:47 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/assembler_x86.hpp	Mon Dec 14 14:48:30 2015 -0800
@@ -655,12 +655,6 @@
   int simd_prefix_and_encode(XMMRegister dst, XMMRegister nds, XMMRegister src, VexSimdPrefix pre,
                              VexOpcode opc, InstructionAttr *attributes);
 
-  int kreg_prefix_and_encode(KRegister dst, KRegister nds, KRegister src, VexSimdPrefix pre,
-                             VexOpcode opc, InstructionAttr *attributes);
-
-  int kreg_prefix_and_encode(KRegister dst, KRegister nds, Register src, VexSimdPrefix pre,
-                             VexOpcode opc, InstructionAttr *attributes);
-
   // Helper functions for groups of instructions
   void emit_arith_b(int op1, int op2, Register dst, int imm8);
 
@@ -1331,12 +1325,17 @@
 
   void movddup(XMMRegister dst, XMMRegister src);
 
+  void kmovbl(KRegister dst, Register src);
+  void kmovbl(Register dst, KRegister src);
   void kmovwl(KRegister dst, Register src);
+  void kmovwl(Register dst, KRegister src);
   void kmovdl(KRegister dst, Register src);
+  void kmovdl(Register dst, KRegister src);
   void kmovql(KRegister dst, KRegister src);
-  void kmovql(KRegister dst, Register src);
   void kmovql(Address dst, KRegister src);
   void kmovql(KRegister dst, Address src);
+  void kmovql(KRegister dst, Register src);
+  void kmovql(Register dst, KRegister src);
 
   void kortestbl(KRegister dst, KRegister src);
   void kortestwl(KRegister dst, KRegister src);
@@ -1521,14 +1520,17 @@
   void pcmpeqb(XMMRegister dst, XMMRegister src);
   void vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len);
   void evpcmpeqb(KRegister kdst, XMMRegister nds, XMMRegister src, int vector_len);
+  void evpcmpeqb(KRegister kdst, XMMRegister nds, Address src, int vector_len);
 
   void pcmpeqw(XMMRegister dst, XMMRegister src);
   void vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len);
   void evpcmpeqw(KRegister kdst, XMMRegister nds, XMMRegister src, int vector_len);
+  void evpcmpeqw(KRegister kdst, XMMRegister nds, Address src, int vector_len);
 
   void pcmpeqd(XMMRegister dst, XMMRegister src);
   void vpcmpeqd(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len);
   void evpcmpeqd(KRegister kdst, XMMRegister nds, XMMRegister src, int vector_len);
+  void evpcmpeqd(KRegister kdst, XMMRegister nds, Address src, int vector_len);
 
   void pcmpeqq(XMMRegister dst, XMMRegister src);
   void vpcmpeqq(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len);

--- a/hotspot/src/cpu/x86/vm/macroAssembler_x86.cpp	Mon Dec 07 15:42:47 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/macroAssembler_x86.cpp	Mon Dec 14 14:48:30 2015 -0800
@@ -7999,9 +7999,15 @@
                                     XMMRegister vec1, int ae) {
   ShortBranchVerifier sbv(this);
   Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL;
+  Label COMPARE_WIDE_VECTORS_LOOP_FAILED;  // used only _LP64 && AVX3
   int stride, stride2, adr_stride, adr_stride1, adr_stride2;
+  int stride2x2 = 0x40;
   Address::ScaleFactor scale, scale1, scale2;
 
+  if (ae != StrIntrinsicNode::LL) {
+    stride2x2 = 0x20;
+  }
+
   if (ae == StrIntrinsicNode::LU || ae == StrIntrinsicNode::UL) {
     shrl(cnt2, 1);
   }
@@ -8011,15 +8017,15 @@
   movl(result, cnt1);
   subl(cnt1, cnt2);
   push(cnt1);
-  cmov32(Assembler::lessEqual, cnt2, result);
+  cmov32(Assembler::lessEqual, cnt2, result);    // cnt2 = min(cnt1, cnt2)
 
   // Is the minimum length zero?
   testl(cnt2, cnt2);
   jcc(Assembler::zero, LENGTH_DIFF_LABEL);
   if (ae == StrIntrinsicNode::LL) {
     // Load first bytes
-    load_unsigned_byte(result, Address(str1, 0));
-    load_unsigned_byte(cnt1, Address(str2, 0));
+    load_unsigned_byte(result, Address(str1, 0));  // result = str1[0]
+    load_unsigned_byte(cnt1, Address(str2, 0));    // cnt1   = str2[0]
   } else if (ae == StrIntrinsicNode::UU) {
     // Load first characters
     load_unsigned_short(result, Address(str1, 0));
@@ -8060,7 +8066,10 @@
     assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available");
     Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR;
     Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR;
+    Label COMPARE_WIDE_VECTORS_LOOP_AVX2;
     Label COMPARE_TAIL_LONG;
+    Label COMPARE_WIDE_VECTORS_LOOP_AVX3;  // used only _LP64 && AVX3
+
     int pcmpmask = 0x19;
     if (ae == StrIntrinsicNode::LL) {
       pcmpmask &= ~0x01;
@@ -8123,11 +8132,40 @@
     }
     subl(result, stride2);
     subl(cnt2, stride2);
-    jccb(Assembler::zero, COMPARE_WIDE_TAIL);
+    jcc(Assembler::zero, COMPARE_WIDE_TAIL);
     negptr(result);
 
     //  In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest)
     bind(COMPARE_WIDE_VECTORS_LOOP);
+
+#ifdef _LP64
+    if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop
+      cmpl(cnt2, stride2x2);
+      jccb(Assembler::below, COMPARE_WIDE_VECTORS_LOOP_AVX2);
+      testl(cnt2, stride2x2-1);   // cnt2 holds the vector count
+      jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX2);   // means we cannot subtract by 0x40
+
+      bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop
+      if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
+        evmovdquq(vec1, Address(str1, result, scale), Assembler::AVX_512bit);
+        evpcmpeqb(k7, vec1, Address(str2, result, scale), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0
+      } else {
+        vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_512bit);
+        evpcmpeqb(k7, vec1, Address(str2, result, scale2), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0
+      }
+      kortestql(k7, k7);
+      jcc(Assembler::aboveEqual, COMPARE_WIDE_VECTORS_LOOP_FAILED);     // miscompare
+      addptr(result, stride2x2);  // update since we already compared at this addr
+      subl(cnt2, stride2x2);      // and sub the size too
+      jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX3);
+
+      vpxor(vec1, vec1);
+      jmpb(COMPARE_WIDE_TAIL);
+    }//if (VM_Version::supports_avx512vlbw())
+#endif // _LP64
+
+
+    bind(COMPARE_WIDE_VECTORS_LOOP_AVX2);
     if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
       vmovdqu(vec1, Address(str1, result, scale));
       vpxor(vec1, Address(str2, result, scale));
@@ -8136,7 +8174,7 @@
       vpxor(vec1, Address(str2, result, scale2));
     }
     vptest(vec1, vec1);
-    jccb(Assembler::notZero, VECTOR_NOT_EQUAL);
+    jcc(Assembler::notZero, VECTOR_NOT_EQUAL);
     addptr(result, stride2);
     subl(cnt2, stride2);
     jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP);
@@ -8151,7 +8189,7 @@
     movl(result, stride2);
     movl(cnt2, result);
     negptr(result);
-    jmpb(COMPARE_WIDE_VECTORS_LOOP);
+    jmp(COMPARE_WIDE_VECTORS_LOOP_AVX2);
 
     // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors.
     bind(VECTOR_NOT_EQUAL);
@@ -8295,6 +8333,34 @@
   }
   jmpb(DONE_LABEL);
 
+#ifdef _LP64
+  if (VM_Version::supports_avx512vlbw()) {
+
+    bind(COMPARE_WIDE_VECTORS_LOOP_FAILED);
+
+    kmovql(cnt1, k7);
+    notq(cnt1);
+    bsfq(cnt2, cnt1);
+    if (ae != StrIntrinsicNode::LL) {
+      // Divide diff by 2 to get number of chars
+      sarl(cnt2, 1);
+    }
+    addq(result, cnt2);
+    if (ae == StrIntrinsicNode::LL) {
+      load_unsigned_byte(cnt1, Address(str2, result));
+      load_unsigned_byte(result, Address(str1, result));
+    } else if (ae == StrIntrinsicNode::UU) {
+      load_unsigned_short(cnt1, Address(str2, result, scale));
+      load_unsigned_short(result, Address(str1, result, scale));
+    } else {
+      load_unsigned_short(cnt1, Address(str2, result, scale2));
+      load_unsigned_byte(result, Address(str1, result, scale1));
+    }
+    subl(result, cnt1);
+    jmpb(POP_LABEL);
+  }//if (VM_Version::supports_avx512vlbw())
+#endif // _LP64
+
   // Discard the stored length difference
   bind(POP_LABEL);
   pop(cnt1);
@@ -8304,6 +8370,7 @@
   if(ae == StrIntrinsicNode::UL) {
     negl(result);
   }
+
 }
 
 // Search for Non-ASCII character (Negative byte value) in a byte array,

--- a/hotspot/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Mon Dec 07 15:42:47 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Mon Dec 14 14:48:30 2015 -0800
@@ -189,7 +189,7 @@
       }
       // Save full ZMM registes(16..num_xmm_regs)
       base_addr = XSAVE_AREA_UPPERBANK;
-      int off = 0;
+      off = 0;
       int vector_len = Assembler::AVX_512bit;
       for (int n = 16; n < num_xmm_regs; n++) {
         __ evmovdqul(Address(rsp, base_addr+(off++*64)), as_XMMRegister(n), vector_len);
@@ -199,7 +199,7 @@
     if (VM_Version::supports_evex()) {
       // Save upper bank of ZMM registers(16..31) for double/float usage
       int base_addr = XSAVE_AREA_UPPERBANK;
-      int off = 0;
+      off = 0;
       for (int n = 16; n < num_xmm_regs; n++) {
         __ movsd(Address(rsp, base_addr+(off++*64)), as_XMMRegister(n));
       }
@@ -325,7 +325,7 @@
     assert(MaxVectorSize == 64, "only 512bit vectors are supported now");
   }
 #else
-  assert(!save_vectors, "vectors are generated only by C2");
+  assert(!restore_vectors, "vectors are generated only by C2");
 #endif
 
   // On EVEX enabled targets everything is handled in pop fpu state

--- a/hotspot/src/cpu/x86/vm/stubGenerator_x86_32.cpp	Mon Dec 07 15:42:47 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/stubGenerator_x86_32.cpp	Mon Dec 14 14:48:30 2015 -0800
@@ -170,7 +170,7 @@
     // provide initial value for required masks
     if (UseAVX > 2) {
       __ movl(rbx, 0xffff);
-      __ kmovdl(k1, rbx);
+      __ kmovwl(k1, rbx);
     }
 
     // save and initialize %mxcsr
@@ -798,7 +798,7 @@
     if (UseAVX > 2) {
       __ push(rbx);
       __ movl(rbx, 0xffff);
-      __ kmovdl(k1, rbx);
+      __ kmovwl(k1, rbx);
       __ pop(rbx);
     }
     // Copy 64-byte chunks

--- a/hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Mon Dec 07 15:42:47 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Mon Dec 14 14:48:30 2015 -0800
@@ -266,7 +266,7 @@
     __ movptr(r15_save, r15);
     if (UseAVX > 2) {
       __ movl(rbx, 0xffff);
-      __ kmovql(k1, rbx);
+      __ kmovwl(k1, rbx);
     }
 #ifdef _WIN64
     int last_reg = 15;
@@ -1350,7 +1350,7 @@
       Label L_end;
       if (UseAVX > 2) {
         __ movl(to, 0xffff);
-        __ kmovql(k1, to);
+        __ kmovwl(k1, to);
       }
       // Copy 64-bytes per iteration
       __ BIND(L_loop);
@@ -1434,7 +1434,7 @@
       Label L_end;
       if (UseAVX > 2) {
         __ movl(to, 0xffff);
-        __ kmovql(k1, to);
+        __ kmovwl(k1, to);
       }
       // Copy 64-bytes per iteration
       __ BIND(L_loop);