3.9.16.
Added basic interface inference for modules (behind the --harmony flag).
Added Object.is, Number.isFinite, Number.isNaN.
Updated the Unicode tables to Unicode version 6.1.0.
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@10979 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 6ddc024..3d953c3 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -3050,16 +3050,64 @@
void LCodeGen::DoRandom(LRandom* instr) {
+ class DeferredDoRandom: public LDeferredCode {
+ public:
+ DeferredDoRandom(LCodeGen* codegen, LRandom* instr)
+ : LDeferredCode(codegen), instr_(instr) { }
+ virtual void Generate() { codegen()->DoDeferredRandom(instr_); }
+ virtual LInstruction* instr() { return instr_; }
+ private:
+ LRandom* instr_;
+ };
+
+ DeferredDoRandom* deferred = new DeferredDoRandom(this, instr);
+
// Having marked this instruction as a call we can use any
// registers.
ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
ASSERT(ToRegister(instr->InputAt(0)).is(eax));
+ // Assert that the register size is indeed the size of each seed.
+ static const int kSeedSize = sizeof(uint32_t);
+ STATIC_ASSERT(kPointerSize == kSeedSize);
- __ PrepareCallCFunction(1, ebx);
__ mov(eax, FieldOperand(eax, GlobalObject::kGlobalContextOffset));
- __ mov(Operand(esp, 0), eax);
- __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
+ static const int kRandomSeedOffset =
+ FixedArray::kHeaderSize + Context::RANDOM_SEED_INDEX * kPointerSize;
+ __ mov(ebx, FieldOperand(eax, kRandomSeedOffset));
+ // ebx: FixedArray of the global context's random seeds
+ // Load state[0].
+ __ mov(ecx, FieldOperand(ebx, ByteArray::kHeaderSize));
+ // If state[0] == 0, call runtime to initialize seeds.
+ __ test(ecx, ecx);
+ __ j(zero, deferred->entry());
+ // Load state[1].
+ __ mov(eax, FieldOperand(ebx, ByteArray::kHeaderSize + kSeedSize));
+ // ecx: state[0]
+ // eax: state[1]
+
+ // state[0] = 18273 * (state[0] & 0xFFFF) + (state[0] >> 16)
+ __ movzx_w(edx, ecx);
+ __ imul(edx, edx, 18273);
+ __ shr(ecx, 16);
+ __ add(ecx, edx);
+ // Save state[0].
+ __ mov(FieldOperand(ebx, ByteArray::kHeaderSize), ecx);
+
+ // state[1] = 36969 * (state[1] & 0xFFFF) + (state[1] >> 16)
+ __ movzx_w(edx, eax);
+ __ imul(edx, edx, 36969);
+ __ shr(eax, 16);
+ __ add(eax, edx);
+ // Save state[1].
+ __ mov(FieldOperand(ebx, ByteArray::kHeaderSize + kSeedSize), eax);
+
+ // Random bit pattern = (state[0] << 14) + (state[1] & 0x3FFFF)
+ __ shl(ecx, 14);
+ __ and_(eax, Immediate(0x3FFFF));
+ __ add(eax, ecx);
+
+ __ bind(deferred->exit());
// Convert 32 random bits in eax to 0.(32 random bits) in a double
// by computing:
// ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
@@ -3072,6 +3120,14 @@
}
+void LCodeGen::DoDeferredRandom(LRandom* instr) {
+ __ PrepareCallCFunction(1, ebx);
+ __ mov(Operand(esp, 0), eax);
+ __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
+ // Return value is in eax.
+}
+
+
void LCodeGen::DoMathLog(LUnaryMathOperation* instr) {
ASSERT(instr->value()->Equals(instr->result()));
XMMRegister input_reg = ToDoubleRegister(instr->value());