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Unified Diff: src/ia32/stub-cache-ia32.cc

Issue 6546036: Combine typed and pixel arrays. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: final version Created 9 years, 9 months ago
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Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index 633097af6678fa8f7ce0190d2e1928a732fffcb8..37688315d2b290b071b5724ac3695b29be1798b4 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -2713,42 +2713,6 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreSpecialized(
}
-MaybeObject* KeyedStoreStubCompiler::CompileStorePixelArray(
- JSObject* receiver) {
- // ----------- S t a t e -------------
- // -- eax : value
- // -- ecx : key
- // -- edx : receiver
- // -- esp[0] : return address
- // -----------------------------------
- Label miss;
-
- // Check that the map matches.
- __ CheckMap(edx, Handle<Map>(receiver->map()), &miss, false);
-
- // Do the load.
- GenerateFastPixelArrayStore(masm(),
- edx,
- ecx,
- eax,
- edi,
- ebx,
- true,
- &miss,
- &miss,
- NULL,
- &miss);
-
- // Handle store cache miss.
- __ bind(&miss);
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss));
- __ jmp(ic, RelocInfo::CODE_TARGET);
-
- // Return the generated code.
- return GetCode(NORMAL, NULL);
-}
-
-
MaybeObject* LoadStubCompiler::CompileLoadNonexistent(String* name,
JSObject* object,
JSObject* last) {
@@ -3195,37 +3159,6 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadSpecialized(JSObject* receiver) {
}
-MaybeObject* KeyedLoadStubCompiler::CompileLoadPixelArray(JSObject* receiver) {
- // ----------- S t a t e -------------
- // -- eax : key
- // -- edx : receiver
- // -- esp[0] : return address
- // -----------------------------------
- Label miss;
-
- // Check that the map matches.
- __ CheckMap(edx, Handle<Map>(receiver->map()), &miss, false);
-
- GenerateFastPixelArrayLoad(masm(),
- edx,
- eax,
- ecx,
- ebx,
- eax,
- &miss,
- &miss,
- &miss);
-
- // Handle load cache miss.
- __ bind(&miss);
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Miss));
- __ jmp(ic, RelocInfo::CODE_TARGET);
-
- // Return the generated code.
- return GetCode(NORMAL, NULL);
-}
-
-
// Specialized stub for constructing objects from functions which only have only
// simple assignments of the form this.x = ...; in their body.
MaybeObject* ConstructStubCompiler::CompileConstructStub(JSFunction* function) {
@@ -3365,7 +3298,7 @@ MaybeObject* ConstructStubCompiler::CompileConstructStub(JSFunction* function) {
MaybeObject* ExternalArrayStubCompiler::CompileKeyedLoadStub(
- ExternalArrayType array_type, Code::Flags flags) {
+ JSObject*receiver, ExternalArrayType array_type, Code::Flags flags) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
@@ -3381,25 +3314,9 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedLoadStub(
__ test(eax, Immediate(kSmiTagMask));
__ j(not_zero, &slow, not_taken);
- // Get the map of the receiver.
- __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
- // Check that the receiver does not require access checks. We need
- // to check this explicitly since this generic stub does not perform
- // map checks.
- __ test_b(FieldOperand(ecx, Map::kBitFieldOffset),
- 1 << Map::kIsAccessCheckNeeded);
- __ j(not_zero, &slow, not_taken);
-
- __ CmpInstanceType(ecx, JS_OBJECT_TYPE);
- __ j(not_equal, &slow, not_taken);
-
- // Check that the elements array is the appropriate type of
- // ExternalArray.
+ // Check that the map matches.
+ __ CheckMap(edx, Handle<Map>(receiver->map()), &slow, false);
__ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
- Handle<Map> map(Heap::MapForExternalArrayType(array_type));
- __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
- Immediate(map));
- __ j(not_equal, &slow, not_taken);
// eax: key, known to be a smi.
// edx: receiver, known to be a JSObject.
@@ -3410,21 +3327,21 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedLoadStub(
__ cmp(ecx, FieldOperand(ebx, ExternalArray::kLengthOffset));
// Unsigned comparison catches both negative and too-large values.
__ j(above_equal, &slow);
-
__ mov(ebx, FieldOperand(ebx, ExternalArray::kExternalPointerOffset));
// ebx: base pointer of external storage
switch (array_type) {
case kExternalByteArray:
- __ movsx_b(ecx, Operand(ebx, ecx, times_1, 0));
+ __ movsx_b(eax, Operand(ebx, ecx, times_1, 0));
break;
case kExternalUnsignedByteArray:
- __ movzx_b(ecx, Operand(ebx, ecx, times_1, 0));
+ case kExternalPixelArray:
+ __ movzx_b(eax, Operand(ebx, ecx, times_1, 0));
break;
case kExternalShortArray:
- __ movsx_w(ecx, Operand(ebx, ecx, times_2, 0));
+ __ movsx_w(eax, Operand(ebx, ecx, times_2, 0));
break;
case kExternalUnsignedShortArray:
- __ movzx_w(ecx, Operand(ebx, ecx, times_2, 0));
+ __ movzx_w(eax, Operand(ebx, ecx, times_2, 0));
break;
case kExternalIntArray:
case kExternalUnsignedIntArray:
@@ -3499,7 +3416,6 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedLoadStub(
__ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
__ ret(0);
} else {
- __ mov(eax, ecx);
__ SmiTag(eax);
__ ret(0);
}
@@ -3534,7 +3450,7 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedLoadStub(
MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
- ExternalArrayType array_type, Code::Flags flags) {
+ JSObject* receiver, ExternalArrayType array_type, Code::Flags flags) {
// ----------- S t a t e -------------
// -- eax : value
// -- ecx : key
@@ -3546,30 +3462,16 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
// Check that the object isn't a smi.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &slow);
- // Get the map from the receiver.
- __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
- // Check that the receiver does not require access checks. We need
- // to do this because this generic stub does not perform map checks.
- __ test_b(FieldOperand(edi, Map::kBitFieldOffset),
- 1 << Map::kIsAccessCheckNeeded);
- __ j(not_zero, &slow);
+
+ // Check that the map matches.
+ __ CheckMap(edx, Handle<Map>(receiver->map()), &slow, false);
+
// Check that the key is a smi.
__ test(ecx, Immediate(kSmiTagMask));
__ j(not_zero, &slow);
- // Get the instance type from the map of the receiver.
- __ CmpInstanceType(edi, JS_OBJECT_TYPE);
- __ j(not_equal, &slow);
-
- // Check that the elements array is the appropriate type of
- // ExternalArray.
- // eax: value
- // edx: receiver, a JSObject
- // ecx: key, a smi
- __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
- __ CheckMap(edi, Handle<Map>(Heap::MapForExternalArrayType(array_type)),
- &slow, true);
// Check that the index is in range.
+ __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
__ mov(ebx, ecx);
__ SmiUntag(ebx);
__ cmp(ebx, FieldOperand(edi, ExternalArray::kLengthOffset));
@@ -3584,13 +3486,28 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
// edi: elements array
// ebx: untagged index
__ test(eax, Immediate(kSmiTagMask));
- __ j(not_equal, &check_heap_number);
+ if (array_type == kExternalPixelArray)
+ __ j(not_equal, &slow);
+ else
+ __ j(not_equal, &check_heap_number);
+
// smi case
__ mov(ecx, eax); // Preserve the value in eax. Key is no longer needed.
__ SmiUntag(ecx);
__ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
// ecx: base pointer of external storage
switch (array_type) {
+ case kExternalPixelArray:
+ { // Clamp the value to [0..255].
+ NearLabel done;
+ __ test(ecx, Immediate(0xFFFFFF00));
+ __ j(zero, &done);
+ __ setcc(negative, ecx); // 1 if negative, 0 if positive.
+ __ dec_b(ecx); // 0 if negative, 255 if positive.
+ __ bind(&done);
+ }
+ __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
+ break;
case kExternalByteArray:
case kExternalUnsignedByteArray:
__ mov_b(Operand(edi, ebx, times_1, 0), ecx);
@@ -3616,87 +3533,100 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
}
__ ret(0); // Return the original value.
- __ bind(&check_heap_number);
- // eax: value
- // edx: receiver
- // ecx: key
- // edi: elements array
- // ebx: untagged index
- __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
- Immediate(Factory::heap_number_map()));
- __ j(not_equal, &slow);
-
- // The WebGL specification leaves the behavior of storing NaN and
- // +/-Infinity into integer arrays basically undefined. For more
- // reproducible behavior, convert these to zero.
- __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
- // ebx: untagged index
- // edi: base pointer of external storage
- if (array_type == kExternalFloatArray) {
- __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
- __ fstp_s(Operand(edi, ebx, times_4, 0));
- __ ret(0);
- } else {
- // Perform float-to-int conversion with truncation (round-to-zero)
- // behavior.
-
- // For the moment we make the slow call to the runtime on
- // processors that don't support SSE2. The code in IntegerConvert
- // (code-stubs-ia32.cc) is roughly what is needed here though the
- // conversion failure case does not need to be handled.
- if (CpuFeatures::IsSupported(SSE2)) {
- if (array_type != kExternalIntArray &&
- array_type != kExternalUnsignedIntArray) {
- ASSERT(CpuFeatures::IsSupported(SSE2));
- CpuFeatures::Scope scope(SSE2);
- __ cvttsd2si(ecx, FieldOperand(eax, HeapNumber::kValueOffset));
- // ecx: untagged integer value
- switch (array_type) {
- case kExternalByteArray:
- case kExternalUnsignedByteArray:
- __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
- break;
- case kExternalShortArray:
- case kExternalUnsignedShortArray:
- __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
- break;
- default:
- UNREACHABLE();
- break;
- }
- } else {
- if (CpuFeatures::IsSupported(SSE3)) {
- CpuFeatures::Scope scope(SSE3);
- // fisttp stores values as signed integers. To represent the
- // entire range of int and unsigned int arrays, store as a
- // 64-bit int and discard the high 32 bits.
- // If the value is NaN or +/-infinity, the result is 0x80000000,
- // which is automatically zero when taken mod 2^n, n < 32.
- __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
- __ sub(Operand(esp), Immediate(2 * kPointerSize));
- __ fisttp_d(Operand(esp, 0));
- __ pop(ecx);
- __ add(Operand(esp), Immediate(kPointerSize));
- } else {
+ // TODO(danno): handle heap number -> pixel array conversion
+ if (array_type != kExternalPixelArray) {
+ __ bind(&check_heap_number);
+ // eax: value
+ // edx: receiver
+ // ecx: key
+ // edi: elements array
+ // ebx: untagged index
+ __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
+ Immediate(Factory::heap_number_map()));
+ __ j(not_equal, &slow);
+
+ // The WebGL specification leaves the behavior of storing NaN and
+ // +/-Infinity into integer arrays basically undefined. For more
+ // reproducible behavior, convert these to zero.
+ __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
+ // ebx: untagged index
+ // edi: base pointer of external storage
+ if (array_type == kExternalFloatArray) {
+ __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
+ __ fstp_s(Operand(edi, ebx, times_4, 0));
+ __ ret(0);
+ } else {
+ // Perform float-to-int conversion with truncation (round-to-zero)
+ // behavior.
+
+ // For the moment we make the slow call to the runtime on
+ // processors that don't support SSE2. The code in IntegerConvert
+ // (code-stubs-ia32.cc) is roughly what is needed here though the
+ // conversion failure case does not need to be handled.
+ if (CpuFeatures::IsSupported(SSE2)) {
+ if (array_type != kExternalIntArray &&
+ array_type != kExternalUnsignedIntArray) {
ASSERT(CpuFeatures::IsSupported(SSE2));
CpuFeatures::Scope scope(SSE2);
- // We can easily implement the correct rounding behavior for the
- // range [0, 2^31-1]. For the time being, to keep this code simple,
- // make the slow runtime call for values outside this range.
- // Note: we could do better for signed int arrays.
- __ movd(xmm0, FieldOperand(eax, HeapNumber::kValueOffset));
- // We will need the key if we have to make the slow runtime call.
- __ push(ecx);
- __ LoadPowerOf2(xmm1, ecx, 31);
- __ pop(ecx);
- __ ucomisd(xmm1, xmm0);
- __ j(above_equal, &slow);
- __ cvttsd2si(ecx, Operand(xmm0));
+ __ cvttsd2si(ecx, FieldOperand(eax, HeapNumber::kValueOffset));
+ // ecx: untagged integer value
+ switch (array_type) {
+ case kExternalPixelArray:
+ { // Clamp the value to [0..255].
+ NearLabel done;
+ __ test(ecx, Immediate(0xFFFFFF00));
+ __ j(zero, &done);
+ __ setcc(negative, ecx); // 1 if negative, 0 if positive.
+ __ dec_b(ecx); // 0 if negative, 255 if positive.
+ __ bind(&done);
+ }
+ __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
+ case kExternalByteArray:
+ case kExternalUnsignedByteArray:
+ __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
+ break;
+ case kExternalShortArray:
+ case kExternalUnsignedShortArray:
+ __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
+ break;
+ default:
+ UNREACHABLE();
+ break;
+ }
+ } else {
+ if (CpuFeatures::IsSupported(SSE3)) {
+ CpuFeatures::Scope scope(SSE3);
+ // fisttp stores values as signed integers. To represent the
+ // entire range of int and unsigned int arrays, store as a
+ // 64-bit int and discard the high 32 bits.
+ // If the value is NaN or +/-infinity, the result is 0x80000000,
+ // which is automatically zero when taken mod 2^n, n < 32.
+ __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
+ __ sub(Operand(esp), Immediate(2 * kPointerSize));
+ __ fisttp_d(Operand(esp, 0));
+ __ pop(ecx);
+ __ add(Operand(esp), Immediate(kPointerSize));
+ } else {
+ ASSERT(CpuFeatures::IsSupported(SSE2));
+ CpuFeatures::Scope scope(SSE2);
+ // We can easily implement the correct rounding behavior for the
+ // range [0, 2^31-1]. For the time being, to keep this code simple,
+ // make the slow runtime call for values outside this range.
+ // Note: we could do better for signed int arrays.
+ __ movd(xmm0, FieldOperand(eax, HeapNumber::kValueOffset));
+ // We will need the key if we have to make the slow runtime call.
+ __ push(ecx);
+ __ LoadPowerOf2(xmm1, ecx, 31);
+ __ pop(ecx);
+ __ ucomisd(xmm1, xmm0);
+ __ j(above_equal, &slow);
+ __ cvttsd2si(ecx, Operand(xmm0));
+ }
+ // ecx: untagged integer value
+ __ mov(Operand(edi, ebx, times_4, 0), ecx);
}
- // ecx: untagged integer value
- __ mov(Operand(edi, ebx, times_4, 0), ecx);
+ __ ret(0); // Return original value.
}
- __ ret(0); // Return original value.
}
}
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