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

Issue 7600025: Create a common subclass for arrays (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: review feedback Created 9 years, 4 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 73f42a3d18fca38e895a73acb7c20deae166094d..4a37b07c71cfb6f12f1ced4e54fc58768362edb0 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -3400,37 +3400,37 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
__ JumpIfNotSmi(eax, &miss_force_generic);
// Check that the index is in range.
- __ mov(ecx, eax);
- __ SmiUntag(ecx); // Untag the index.
__ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
- __ cmp(ecx, FieldOperand(ebx, ExternalArray::kLengthOffset));
+ __ cmp(eax, FieldOperand(ebx, ExternalArray::kLengthOffset));
// Unsigned comparison catches both negative and too-large values.
__ j(above_equal, &miss_force_generic);
__ mov(ebx, FieldOperand(ebx, ExternalArray::kExternalPointerOffset));
// ebx: base pointer of external storage
switch (elements_kind) {
case JSObject::EXTERNAL_BYTE_ELEMENTS:
- __ movsx_b(eax, Operand(ebx, ecx, times_1, 0));
+ __ SmiUntag(eax); // Untag the index.
+ __ movsx_b(eax, Operand(ebx, eax, times_1, 0));
break;
case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
case JSObject::EXTERNAL_PIXEL_ELEMENTS:
- __ movzx_b(eax, Operand(ebx, ecx, times_1, 0));
+ __ SmiUntag(eax); // Untag the index.
+ __ movzx_b(eax, Operand(ebx, eax, times_1, 0));
break;
case JSObject::EXTERNAL_SHORT_ELEMENTS:
- __ movsx_w(eax, Operand(ebx, ecx, times_2, 0));
+ __ movsx_w(eax, Operand(ebx, eax, times_1, 0));
break;
case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
- __ movzx_w(eax, Operand(ebx, ecx, times_2, 0));
+ __ movzx_w(eax, Operand(ebx, eax, times_1, 0));
break;
case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
case JSObject::EXTERNAL_INT_ELEMENTS:
- __ mov(ecx, Operand(ebx, ecx, times_4, 0));
+ __ mov(ecx, Operand(ebx, eax, times_2, 0));
break;
case JSObject::EXTERNAL_FLOAT_ELEMENTS:
- __ fld_s(Operand(ebx, ecx, times_4, 0));
+ __ fld_s(Operand(ebx, eax, times_2, 0));
break;
case JSObject::EXTERNAL_DOUBLE_ELEMENTS:
- __ fld_d(Operand(ebx, ecx, times_8, 0));
+ __ fld_d(Operand(ebx, eax, times_4, 0));
break;
default:
UNREACHABLE();
@@ -3556,9 +3556,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
// Check that the index is in range.
__ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
- __ mov(ebx, ecx);
- __ SmiUntag(ebx);
- __ cmp(ebx, FieldOperand(edi, ExternalArray::kLengthOffset));
+ __ cmp(ecx, FieldOperand(edi, ExternalArray::kLengthOffset));
// Unsigned comparison catches both negative and too-large values.
__ j(above_equal, &slow);
@@ -3568,7 +3566,6 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
// edx: receiver
// ecx: key
// edi: elements array
- // ebx: untagged index
if (elements_kind == JSObject::EXTERNAL_PIXEL_ELEMENTS) {
__ JumpIfNotSmi(eax, &slow);
} else {
@@ -3576,44 +3573,39 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
}
// smi case
- __ mov(ecx, eax); // Preserve the value in eax. Key is no longer needed.
- __ SmiUntag(ecx);
+ __ mov(ebx, eax); // Preserve the value in eax as the return value.
+ __ SmiUntag(ebx);
__ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
- // ecx: base pointer of external storage
+ // edi: base pointer of external storage
switch (elements_kind) {
case JSObject::EXTERNAL_PIXEL_ELEMENTS:
- { // Clamp the value to [0..255].
- Label done;
- __ test(ecx, Immediate(0xFFFFFF00));
- __ j(zero, &done, Label::kNear);
- __ 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);
+ __ ClampUint8(ebx);
+ __ SmiUntag(ecx);
+ __ mov_b(Operand(edi, ecx, times_1, 0), ebx);
break;
case JSObject::EXTERNAL_BYTE_ELEMENTS:
case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
- __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
+ __ SmiUntag(ecx);
+ __ mov_b(Operand(edi, ecx, times_1, 0), ebx);
break;
case JSObject::EXTERNAL_SHORT_ELEMENTS:
case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
- __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
+ __ mov_w(Operand(edi, ecx, times_1, 0), ebx);
break;
case JSObject::EXTERNAL_INT_ELEMENTS:
case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
- __ mov(Operand(edi, ebx, times_4, 0), ecx);
+ __ mov(Operand(edi, ecx, times_2, 0), ebx);
break;
case JSObject::EXTERNAL_FLOAT_ELEMENTS:
case JSObject::EXTERNAL_DOUBLE_ELEMENTS:
// Need to perform int-to-float conversion.
- __ push(ecx);
+ __ push(ebx);
__ fild_s(Operand(esp, 0));
- __ pop(ecx);
+ __ pop(ebx);
if (elements_kind == JSObject::EXTERNAL_FLOAT_ELEMENTS) {
- __ fstp_s(Operand(edi, ebx, times_4, 0));
+ __ fstp_s(Operand(edi, ecx, times_2, 0));
} else { // elements_kind == JSObject::EXTERNAL_DOUBLE_ELEMENTS.
- __ fstp_d(Operand(edi, ebx, times_8, 0));
+ __ fstp_d(Operand(edi, ecx, times_4, 0));
}
break;
default:
@@ -3629,7 +3621,6 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
// edx: receiver
// ecx: key
// edi: elements array
- // ebx: untagged index
__ cmp(FieldOperand(eax, HeapObject::kMapOffset),
Immediate(masm->isolate()->factory()->heap_number_map()));
__ j(not_equal, &slow);
@@ -3638,15 +3629,14 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
// +/-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 (elements_kind == JSObject::EXTERNAL_FLOAT_ELEMENTS) {
__ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
- __ fstp_s(Operand(edi, ebx, times_4, 0));
+ __ fstp_s(Operand(edi, ecx, times_2, 0));
__ ret(0);
} else if (elements_kind == JSObject::EXTERNAL_DOUBLE_ELEMENTS) {
__ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
- __ fstp_d(Operand(edi, ebx, times_8, 0));
+ __ fstp_d(Operand(edi, ecx, times_4, 0));
__ ret(0);
} else {
// Perform float-to-int conversion with truncation (round-to-zero)
@@ -3661,27 +3651,20 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
elements_kind != JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS) {
ASSERT(CpuFeatures::IsSupported(SSE2));
CpuFeatures::Scope scope(SSE2);
- __ cvttsd2si(ecx, FieldOperand(eax, HeapNumber::kValueOffset));
+ __ cvttsd2si(ebx, FieldOperand(eax, HeapNumber::kValueOffset));
// ecx: untagged integer value
switch (elements_kind) {
case JSObject::EXTERNAL_PIXEL_ELEMENTS:
- { // Clamp the value to [0..255].
- Label done;
- __ test(ecx, Immediate(0xFFFFFF00));
- __ j(zero, &done, Label::kNear);
- __ 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;
+ __ ClampUint8(ebx);
+ // Fall through.
case JSObject::EXTERNAL_BYTE_ELEMENTS:
case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
- __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
+ __ SmiUntag(ecx);
+ __ mov_b(Operand(edi, ecx, times_1, 0), ebx);
break;
case JSObject::EXTERNAL_SHORT_ELEMENTS:
case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
- __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
+ __ mov_w(Operand(edi, ecx, times_1, 0), ebx);
break;
default:
UNREACHABLE();
@@ -3698,7 +3681,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
__ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
__ sub(Operand(esp), Immediate(2 * kPointerSize));
__ fisttp_d(Operand(esp, 0));
- __ pop(ecx);
+ __ pop(ebx);
__ add(Operand(esp), Immediate(kPointerSize));
} else {
ASSERT(CpuFeatures::IsSupported(SSE2));
@@ -3709,15 +3692,15 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
// 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);
+ __ push(ebx);
+ __ LoadPowerOf2(xmm1, ebx, 31);
+ __ pop(ebx);
__ ucomisd(xmm1, xmm0);
__ j(above_equal, &slow);
- __ cvttsd2si(ecx, Operand(xmm0));
+ __ cvttsd2si(ebx, Operand(xmm0));
}
- // ecx: untagged integer value
- __ mov(Operand(edi, ebx, times_4, 0), ecx);
+ // ebx: untagged integer value
+ __ mov(Operand(edi, ecx, times_2, 0), ebx);
}
__ ret(0); // Return original value.
}
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