Tue, 15 May 2012 10:10:23 +0200
7133857: exp() and pow() should use the x87 ISA on x86
Summary: use x87 instructions to implement exp() and pow() in interpreter/c1/c2.
Reviewed-by: kvn, never, twisti
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
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23 */
25 #ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP
26 #define SHARE_VM_INTERPRETER_BYTECODE_HPP
28 #include "interpreter/bytecodes.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/methodOop.hpp"
31 #ifdef TARGET_ARCH_x86
32 # include "bytes_x86.hpp"
33 #endif
34 #ifdef TARGET_ARCH_sparc
35 # include "bytes_sparc.hpp"
36 #endif
37 #ifdef TARGET_ARCH_zero
38 # include "bytes_zero.hpp"
39 #endif
40 #ifdef TARGET_ARCH_arm
41 # include "bytes_arm.hpp"
42 #endif
43 #ifdef TARGET_ARCH_ppc
44 # include "bytes_ppc.hpp"
45 #endif
47 class ciBytecodeStream;
49 // The base class for different kinds of bytecode abstractions.
50 // Provides the primitive operations to manipulate code relative
51 // to the bcp.
53 class Bytecode: public StackObj {
54 protected:
55 const address _bcp;
56 const Bytecodes::Code _code;
58 // Address computation
59 address addr_at (int offset) const { return (address)_bcp + offset; }
60 u_char byte_at(int offset) const { return *addr_at(offset); }
61 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
62 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
64 // Word access:
65 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
66 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
67 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); }
68 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); }
70 public:
71 Bytecode(methodOop method, address bcp): _bcp(bcp), _code(Bytecodes::code_at(method, addr_at(0))) {
72 assert(method != NULL, "this form requires a valid methodOop");
73 }
74 // Defined in ciStreams.hpp
75 inline Bytecode(const ciBytecodeStream* stream, address bcp = NULL);
77 // Attributes
78 address bcp() const { return _bcp; }
79 int instruction_size() const { return Bytecodes::length_for_code_at(_code, bcp()); }
81 Bytecodes::Code code() const { return _code; }
82 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); }
84 // Static functions for parsing bytecodes in place.
85 int get_index_u1(Bytecodes::Code bc) const {
86 assert_same_format_as(bc); assert_index_size(1, bc);
87 return *(jubyte*)addr_at(1);
88 }
89 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const {
90 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide);
91 address p = addr_at(is_wide ? 2 : 1);
92 if (can_use_native_byte_order(bc, is_wide))
93 return Bytes::get_native_u2(p);
94 else return Bytes::get_Java_u2(p);
95 }
96 int get_index_u1_cpcache(Bytecodes::Code bc) const {
97 assert_same_format_as(bc); assert_index_size(1, bc);
98 return *(jubyte*)addr_at(1) + constantPoolOopDesc::CPCACHE_INDEX_TAG;
99 }
100 int get_index_u2_cpcache(Bytecodes::Code bc) const {
101 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc);
102 return Bytes::get_native_u2(addr_at(1)) + constantPoolOopDesc::CPCACHE_INDEX_TAG;
103 }
104 int get_index_u4(Bytecodes::Code bc) const {
105 assert_same_format_as(bc); assert_index_size(4, bc);
106 assert(can_use_native_byte_order(bc), "");
107 return Bytes::get_native_u4(addr_at(1));
108 }
109 bool has_index_u4(Bytecodes::Code bc) const {
110 return bc == Bytecodes::_invokedynamic;
111 }
113 int get_offset_s2(Bytecodes::Code bc) const {
114 assert_same_format_as(bc); assert_offset_size(2, bc);
115 return (jshort) Bytes::get_Java_u2(addr_at(1));
116 }
117 int get_offset_s4(Bytecodes::Code bc) const {
118 assert_same_format_as(bc); assert_offset_size(4, bc);
119 return (jint) Bytes::get_Java_u4(addr_at(1));
120 }
122 int get_constant_u1(int offset, Bytecodes::Code bc) const {
123 assert_same_format_as(bc); assert_constant_size(1, offset, bc);
124 return *(jbyte*)addr_at(offset);
125 }
126 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const {
127 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide);
128 return (jshort) Bytes::get_Java_u2(addr_at(offset));
129 }
131 // These are used locally and also from bytecode streams.
132 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN;
133 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
134 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
135 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
136 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
137 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) {
138 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/));
139 }
140 };
143 // Abstractions for lookupswitch bytecode
144 class LookupswitchPair VALUE_OBJ_CLASS_SPEC {
145 private:
146 const address _bcp;
148 address addr_at (int offset) const { return _bcp + offset; }
149 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
151 public:
152 LookupswitchPair(address bcp): _bcp(bcp) {}
153 int match() const { return get_Java_u4_at(0 * jintSize); }
154 int offset() const { return get_Java_u4_at(1 * jintSize); }
155 };
158 class Bytecode_lookupswitch: public Bytecode {
159 public:
160 Bytecode_lookupswitch(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
161 // Defined in ciStreams.hpp
162 inline Bytecode_lookupswitch(const ciBytecodeStream* stream);
163 void verify() const PRODUCT_RETURN;
165 // Attributes
166 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
167 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
168 LookupswitchPair pair_at(int i) const {
169 assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
170 return LookupswitchPair(aligned_addr_at(1 + (1 + i)*2*jintSize));
171 }
172 };
174 class Bytecode_tableswitch: public Bytecode {
175 public:
176 Bytecode_tableswitch(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
177 // Defined in ciStreams.hpp
178 inline Bytecode_tableswitch(const ciBytecodeStream* stream);
179 void verify() const PRODUCT_RETURN;
181 // Attributes
182 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
183 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
184 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); }
185 int dest_offset_at(int i) const;
186 int length() { return high_key()-low_key()+1; }
187 };
189 // Common code for decoding invokes and field references.
191 class Bytecode_member_ref: public Bytecode {
192 protected:
193 const methodHandle _method; // method containing the bytecode
195 Bytecode_member_ref(methodHandle method, int bci) : Bytecode(method(), method()->bcp_from(bci)), _method(method) {}
197 methodHandle method() const { return _method; }
199 public:
200 int index() const; // cache index (loaded from instruction)
201 int pool_index() const; // constant pool index
202 Symbol* name() const; // returns the name of the method or field
203 Symbol* signature() const; // returns the signature of the method or field
205 BasicType result_type() const; // returns the result type of the getfield or invoke
206 };
208 // Abstraction for invoke_{virtual, static, interface, special}
210 class Bytecode_invoke: public Bytecode_member_ref {
211 protected:
212 // Constructor that skips verification
213 Bytecode_invoke(methodHandle method, int bci, bool unused) : Bytecode_member_ref(method, bci) {}
215 public:
216 Bytecode_invoke(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
217 void verify() const;
219 // Attributes
220 methodHandle static_target(TRAPS); // "specified" method (from constant pool)
222 // Testers
223 bool is_invokeinterface() const { return java_code() == Bytecodes::_invokeinterface; }
224 bool is_invokevirtual() const { return java_code() == Bytecodes::_invokevirtual; }
225 bool is_invokestatic() const { return java_code() == Bytecodes::_invokestatic; }
226 bool is_invokespecial() const { return java_code() == Bytecodes::_invokespecial; }
227 bool is_invokedynamic() const { return java_code() == Bytecodes::_invokedynamic; }
229 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); }
231 bool is_valid() const { return is_invokeinterface() ||
232 is_invokevirtual() ||
233 is_invokestatic() ||
234 is_invokespecial() ||
235 is_invokedynamic(); }
237 bool is_method_handle_invoke() const {
238 return (is_invokedynamic() ||
239 (is_invokevirtual() &&
240 method()->constants()->klass_ref_at_noresolve(index()) == vmSymbols::java_lang_invoke_MethodHandle() &&
241 methodOopDesc::is_method_handle_invoke_name(name())));
242 }
244 // Helper to skip verification. Used is_valid() to check if the result is really an invoke
245 inline friend Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci);
246 };
248 inline Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci) {
249 return Bytecode_invoke(method, bci, false);
250 }
253 // Abstraction for all field accesses (put/get field/static)
254 class Bytecode_field: public Bytecode_member_ref {
255 public:
256 Bytecode_field(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
258 // Testers
259 bool is_getfield() const { return java_code() == Bytecodes::_getfield; }
260 bool is_putfield() const { return java_code() == Bytecodes::_putfield; }
261 bool is_getstatic() const { return java_code() == Bytecodes::_getstatic; }
262 bool is_putstatic() const { return java_code() == Bytecodes::_putstatic; }
264 bool is_getter() const { return is_getfield() || is_getstatic(); }
265 bool is_static() const { return is_getstatic() || is_putstatic(); }
267 bool is_valid() const { return is_getfield() ||
268 is_putfield() ||
269 is_getstatic() ||
270 is_putstatic(); }
271 void verify() const;
272 };
274 // Abstraction for checkcast
275 class Bytecode_checkcast: public Bytecode {
276 public:
277 Bytecode_checkcast(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
278 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
280 // Returns index
281 long index() const { return get_index_u2(Bytecodes::_checkcast); };
282 };
284 // Abstraction for instanceof
285 class Bytecode_instanceof: public Bytecode {
286 public:
287 Bytecode_instanceof(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
288 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
290 // Returns index
291 long index() const { return get_index_u2(Bytecodes::_instanceof); };
292 };
294 class Bytecode_new: public Bytecode {
295 public:
296 Bytecode_new(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
297 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
299 // Returns index
300 long index() const { return get_index_u2(Bytecodes::_new); };
301 };
303 class Bytecode_multianewarray: public Bytecode {
304 public:
305 Bytecode_multianewarray(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
306 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
308 // Returns index
309 long index() const { return get_index_u2(Bytecodes::_multianewarray); };
310 };
312 class Bytecode_anewarray: public Bytecode {
313 public:
314 Bytecode_anewarray(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
315 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
317 // Returns index
318 long index() const { return get_index_u2(Bytecodes::_anewarray); };
319 };
321 // Abstraction for ldc, ldc_w and ldc2_w
322 class Bytecode_loadconstant: public Bytecode {
323 private:
324 const methodHandle _method;
326 int raw_index() const;
328 public:
329 Bytecode_loadconstant(methodHandle method, int bci): Bytecode(method(), method->bcp_from(bci)), _method(method) { verify(); }
331 void verify() const {
332 assert(_method.not_null(), "must supply method");
333 Bytecodes::Code stdc = Bytecodes::java_code(code());
334 assert(stdc == Bytecodes::_ldc ||
335 stdc == Bytecodes::_ldc_w ||
336 stdc == Bytecodes::_ldc2_w, "load constant");
337 }
339 // Only non-standard bytecodes (fast_aldc) have CP cache indexes.
340 bool has_cache_index() const { return code() >= Bytecodes::number_of_java_codes; }
342 int pool_index() const; // index into constant pool
343 int cache_index() const { // index into CP cache (or -1 if none)
344 return has_cache_index() ? raw_index() : -1;
345 }
347 BasicType result_type() const; // returns the result type of the ldc
349 oop resolve_constant(TRAPS) const;
350 };
352 #endif // SHARE_VM_INTERPRETER_BYTECODE_HPP