Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/cpu/x86/vm/c1_LIRGenerator_x86.cpp
src/cpu/x86/vm/c1_LIRGenerator_x86.cpp
- changeset 9843
- a6f289d66efe
- parent 9614
- bb44c0e88235
- child 9852
- 70aa912cebe5
equal
deleted
inserted
replaced
| 9842:4df47a343601 | 9843:a6f289d66efe |
|---|---|
| 231 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) { | 231 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) { |
| 232 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info); | 232 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info); |
| 233 } | 233 } |
| 234 | 234 |
| 235 | 235 |
| 236 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) { | 236 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, jint c, LIR_Opr result, LIR_Opr tmp) { |
| 237 if (tmp->is_valid()) { | 237 if (tmp->is_valid() && c > 0 && c < max_jint) { |
| 238 if (is_power_of_2(c + 1)) { | 238 if (is_power_of_2(c + 1)) { |
| 239 __ move(left, tmp); | 239 __ move(left, tmp); |
| 240 __ shift_left(left, log2_jint(c + 1), left); | 240 __ shift_left(left, log2_jint(c + 1), left); |
| 241 __ sub(left, tmp, result); | 241 __ sub(left, tmp, result); |
| 242 return true; | 242 return true; |
| 600 if (x->op() == Bytecodes::_imul ) { | 600 if (x->op() == Bytecodes::_imul ) { |
| 601 // check if we can use shift instead | 601 // check if we can use shift instead |
| 602 bool use_constant = false; | 602 bool use_constant = false; |
| 603 bool use_tmp = false; | 603 bool use_tmp = false; |
| 604 if (right_arg->is_constant()) { | 604 if (right_arg->is_constant()) { |
| 605 int iconst = right_arg->get_jint_constant(); | 605 jint iconst = right_arg->get_jint_constant(); |
| 606 if (iconst > 0) { | 606 if (iconst > 0 && iconst < max_jint) { |
| 607 if (is_power_of_2(iconst)) { | 607 if (is_power_of_2(iconst)) { |
| 608 use_constant = true; | 608 use_constant = true; |
| 609 } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) { | 609 } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) { |
| 610 use_constant = true; | 610 use_constant = true; |
| 611 use_tmp = true; | 611 use_tmp = true; |
