Index: src/arm/lithium-codegen-arm.cc |
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc |
index 56717a29e129e19071133d6fecb60db19bfbad56..156ae1840529e8c97cefb0806678dfbaf1727306 100644 |
--- a/src/arm/lithium-codegen-arm.cc |
+++ b/src/arm/lithium-codegen-arm.cc |
@@ -3953,68 +3953,6 @@ void LCodeGen::DoPower(LPower* instr) { |
} |
-void LCodeGen::DoRandom(LRandom* instr) { |
- // Assert that the register size is indeed the size of each seed. |
- static const int kSeedSize = sizeof(uint32_t); |
- STATIC_ASSERT(kPointerSize == kSeedSize); |
- |
- // Load native context |
- Register global_object = ToRegister(instr->global_object()); |
- Register native_context = global_object; |
- __ ldr(native_context, FieldMemOperand( |
- global_object, GlobalObject::kNativeContextOffset)); |
- |
- // Load state (FixedArray of the native context's random seeds) |
- static const int kRandomSeedOffset = |
- FixedArray::kHeaderSize + Context::RANDOM_SEED_INDEX * kPointerSize; |
- Register state = native_context; |
- __ ldr(state, FieldMemOperand(native_context, kRandomSeedOffset)); |
- |
- // Load state[0]. |
- Register state0 = ToRegister(instr->scratch()); |
- __ ldr(state0, FieldMemOperand(state, ByteArray::kHeaderSize)); |
- // Load state[1]. |
- Register state1 = ToRegister(instr->scratch2()); |
- __ ldr(state1, FieldMemOperand(state, ByteArray::kHeaderSize + kSeedSize)); |
- |
- // state[0] = 18273 * (state[0] & 0xFFFF) + (state[0] >> 16) |
- Register scratch3 = ToRegister(instr->scratch3()); |
- Register scratch4 = scratch0(); |
- __ and_(scratch3, state0, Operand(0xFFFF)); |
- __ mov(scratch4, Operand(18273)); |
- __ mul(scratch3, scratch3, scratch4); |
- __ add(state0, scratch3, Operand(state0, LSR, 16)); |
- // Save state[0]. |
- __ str(state0, FieldMemOperand(state, ByteArray::kHeaderSize)); |
- |
- // state[1] = 36969 * (state[1] & 0xFFFF) + (state[1] >> 16) |
- __ and_(scratch3, state1, Operand(0xFFFF)); |
- __ mov(scratch4, Operand(36969)); |
- __ mul(scratch3, scratch3, scratch4); |
- __ add(state1, scratch3, Operand(state1, LSR, 16)); |
- // Save state[1]. |
- __ str(state1, FieldMemOperand(state, ByteArray::kHeaderSize + kSeedSize)); |
- |
- // Random bit pattern = (state[0] << 14) + (state[1] & 0x3FFFF) |
- Register random = scratch4; |
- __ and_(random, state1, Operand(0x3FFFF)); |
- __ add(random, random, Operand(state0, LSL, 14)); |
- |
- // 0x41300000 is the top half of 1.0 x 2^20 as a double. |
- // Create this constant using mov/orr to avoid PC relative load. |
- __ mov(scratch3, Operand(0x41000000)); |
- __ orr(scratch3, scratch3, Operand(0x300000)); |
- // Move 0x41300000xxxxxxxx (x = random bits) to VFP. |
- DwVfpRegister result = ToDoubleRegister(instr->result()); |
- __ vmov(result, random, scratch3); |
- // Move 0x4130000000000000 to VFP. |
- __ mov(scratch4, Operand::Zero()); |
- DwVfpRegister scratch5 = double_scratch0(); |
- __ vmov(scratch5, scratch4, scratch3); |
- __ vsub(result, result, scratch5); |
-} |
- |
- |
void LCodeGen::DoMathExp(LMathExp* instr) { |
DwVfpRegister input = ToDoubleRegister(instr->value()); |
DwVfpRegister result = ToDoubleRegister(instr->result()); |