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Issue 11280106: MIPS: DoNumberTagD performance improvement (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Rebased on r13080 Created 8 years ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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3208 scratch2); 3208 scratch2);
3209 } 3209 }
3210 3210
3211 3211
3212 // Allocates a heap number or jumps to the label if the young space is full and 3212 // Allocates a heap number or jumps to the label if the young space is full and
3213 // a scavenge is needed. 3213 // a scavenge is needed.
3214 void MacroAssembler::AllocateHeapNumber(Register result, 3214 void MacroAssembler::AllocateHeapNumber(Register result,
3215 Register scratch1, 3215 Register scratch1,
3216 Register scratch2, 3216 Register scratch2,
3217 Register heap_number_map, 3217 Register heap_number_map,
3218 Label* need_gc) { 3218 Label* need_gc,
3219 TaggingMode tagging_mode) {
3219 // Allocate an object in the heap for the heap number and tag it as a heap 3220 // Allocate an object in the heap for the heap number and tag it as a heap
3220 // object. 3221 // object.
3221 AllocateInNewSpace(HeapNumber::kSize, 3222 AllocateInNewSpace(HeapNumber::kSize,
3222 result, 3223 result,
3223 scratch1, 3224 scratch1,
3224 scratch2, 3225 scratch2,
3225 need_gc, 3226 need_gc,
3226 TAG_OBJECT); 3227 tagging_mode == TAG_RESULT ? TAG_OBJECT :
3228 NO_ALLOCATION_FLAGS);
3227 3229
3228 // Store heap number map in the allocated object. 3230 // Store heap number map in the allocated object.
3229 AssertRegisterIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); 3231 AssertRegisterIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
3230 sw(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset)); 3232 if (tagging_mode == TAG_RESULT) {
3233 sw(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset));
3234 } else {
3235 sw(heap_number_map, MemOperand(result, HeapObject::kMapOffset));
3236 }
3231 } 3237 }
3232 3238
3233 3239
3234 void MacroAssembler::AllocateHeapNumberWithValue(Register result, 3240 void MacroAssembler::AllocateHeapNumberWithValue(Register result,
3235 FPURegister value, 3241 FPURegister value,
3236 Register scratch1, 3242 Register scratch1,
3237 Register scratch2, 3243 Register scratch2,
3238 Label* gc_required) { 3244 Label* gc_required) {
3239 LoadRoot(t8, Heap::kHeapNumberMapRootIndex); 3245 LoadRoot(t8, Heap::kHeapNumberMapRootIndex);
3240 AllocateHeapNumber(result, scratch1, scratch2, t8, gc_required); 3246 AllocateHeapNumber(result, scratch1, scratch2, t8, gc_required);
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5465 opcode == BGTZL); 5471 opcode == BGTZL);
5466 opcode = (cond == eq) ? BEQ : BNE; 5472 opcode = (cond == eq) ? BEQ : BNE;
5467 instr = (instr & ~kOpcodeMask) | opcode; 5473 instr = (instr & ~kOpcodeMask) | opcode;
5468 masm_.emit(instr); 5474 masm_.emit(instr);
5469 } 5475 }
5470 5476
5471 5477
5472 } } // namespace v8::internal 5478 } } // namespace v8::internal
5473 5479
5474 #endif // V8_TARGET_ARCH_MIPS 5480 #endif // V8_TARGET_ARCH_MIPS
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