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Unified Diff: src/mips/codegen-mips.cc

Issue 228943009: MIPS: Add big-endian support for MIPS. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Comments addressed Created 6 years, 8 months ago
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Index: src/mips/codegen-mips.cc
diff --git a/src/mips/codegen-mips.cc b/src/mips/codegen-mips.cc
index 1b79433d3760ca1cadbde60c17fee339480e4bb2..a2b976d4accd2447eae2de7e1344fe5340a60d27 100644
--- a/src/mips/codegen-mips.cc
+++ b/src/mips/codegen-mips.cc
@@ -67,21 +67,13 @@ UnaryMathFunction CreateExpFunction() {
Register temp2 = t1;
Register temp3 = t2;
- if (!IsMipsSoftFloatABI) {
- // Input value is in f12 anyway, nothing to do.
- } else {
- __ Move(input, a0, a1);
- }
+ __ MovFromFloatParameter(input);
__ Push(temp3, temp2, temp1);
MathExpGenerator::EmitMathExp(
&masm, input, result, double_scratch1, double_scratch2,
temp1, temp2, temp3);
__ Pop(temp3, temp2, temp1);
- if (!IsMipsSoftFloatABI) {
- // Result is already in f0, nothing to do.
- } else {
- __ Move(v0, v1, result);
- }
+ __ MovToFloatResult(result);
__ Ret();
}
@@ -167,11 +159,17 @@ OS::MemCopyUint8Function CreateMemCopyUint8Function(
__ beq(a3, zero_reg, &aligned); // Already aligned.
__ subu(a2, a2, a3); // In delay slot. a2 is the remining bytes count.
- __ lwr(t8, MemOperand(a1));
- __ addu(a1, a1, a3);
- __ swr(t8, MemOperand(a0));
- __ addu(a0, a0, a3);
-
+ if (kArchEndian == kLittle) {
+ __ lwr(t8, MemOperand(a1));
+ __ addu(a1, a1, a3);
+ __ swr(t8, MemOperand(a0));
+ __ addu(a0, a0, a3);
+ } else {
+ __ lwl(t8, MemOperand(a1));
+ __ addu(a1, a1, a3);
+ __ swl(t8, MemOperand(a0));
+ __ addu(a0, a0, a3);
+ }
// Now dst/src are both aligned to (word) aligned addresses. Set a2 to
// count how many bytes we have to copy after all the 64 byte chunks are
// copied and a3 to the dst pointer after all the 64 byte chunks have been
@@ -323,12 +321,21 @@ OS::MemCopyUint8Function CreateMemCopyUint8Function(
__ beq(a3, zero_reg, &ua_chk16w);
__ subu(a2, a2, a3); // In delay slot.
- __ lwr(v1, MemOperand(a1));
- __ lwl(v1,
- MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
- __ addu(a1, a1, a3);
- __ swr(v1, MemOperand(a0));
- __ addu(a0, a0, a3);
+ if (kArchEndian == kLittle) {
+ __ lwr(v1, MemOperand(a1));
+ __ lwl(v1,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ __ addu(a1, a1, a3);
+ __ swr(v1, MemOperand(a0));
+ __ addu(a0, a0, a3);
+ } else {
+ __ lwl(v1, MemOperand(a1));
+ __ lwr(v1,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ __ addu(a1, a1, a3);
+ __ swl(v1, MemOperand(a0));
+ __ addu(a0, a0, a3);
+ }
// Now the dst (but not the source) is aligned. Set a2 to count how many
// bytes we have to copy after all the 64 byte chunks are copied and a3 to
@@ -357,40 +364,77 @@ OS::MemCopyUint8Function CreateMemCopyUint8Function(
__ bind(&ua_loop16w);
__ Pref(pref_hint_load, MemOperand(a1, 3 * pref_chunk));
- __ lwr(t0, MemOperand(a1));
- __ lwr(t1, MemOperand(a1, 1, loadstore_chunk));
- __ lwr(t2, MemOperand(a1, 2, loadstore_chunk));
-
- if (pref_hint_store == kPrefHintPrepareForStore) {
- __ sltu(v1, t9, a0);
- __ Branch(USE_DELAY_SLOT, &ua_skip_pref, gt, v1, Operand(zero_reg));
+ if (kArchEndian == kLittle) {
+ __ lwr(t0, MemOperand(a1));
+ __ lwr(t1, MemOperand(a1, 1, loadstore_chunk));
+ __ lwr(t2, MemOperand(a1, 2, loadstore_chunk));
+
+ if (pref_hint_store == kPrefHintPrepareForStore) {
+ __ sltu(v1, t9, a0);
+ __ Branch(USE_DELAY_SLOT, &ua_skip_pref, gt, v1, Operand(zero_reg));
+ }
+ __ lwr(t3, MemOperand(a1, 3, loadstore_chunk)); // Maybe in delay slot.
+
+ __ Pref(pref_hint_store, MemOperand(a0, 4 * pref_chunk));
+ __ Pref(pref_hint_store, MemOperand(a0, 5 * pref_chunk));
+
+ __ bind(&ua_skip_pref);
+ __ lwr(t4, MemOperand(a1, 4, loadstore_chunk));
+ __ lwr(t5, MemOperand(a1, 5, loadstore_chunk));
+ __ lwr(t6, MemOperand(a1, 6, loadstore_chunk));
+ __ lwr(t7, MemOperand(a1, 7, loadstore_chunk));
+ __ lwl(t0,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t1,
+ MemOperand(a1, 2, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t2,
+ MemOperand(a1, 3, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t3,
+ MemOperand(a1, 4, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t4,
+ MemOperand(a1, 5, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t5,
+ MemOperand(a1, 6, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t6,
+ MemOperand(a1, 7, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t7,
+ MemOperand(a1, 8, loadstore_chunk, MemOperand::offset_minus_one));
+ } else {
+ __ lwl(t0, MemOperand(a1));
+ __ lwl(t1, MemOperand(a1, 1, loadstore_chunk));
+ __ lwl(t2, MemOperand(a1, 2, loadstore_chunk));
+
+ if (pref_hint_store == kPrefHintPrepareForStore) {
+ __ sltu(v1, t9, a0);
+ __ Branch(USE_DELAY_SLOT, &ua_skip_pref, gt, v1, Operand(zero_reg));
+ }
+ __ lwl(t3, MemOperand(a1, 3, loadstore_chunk)); // Maybe in delay slot.
+
+ __ Pref(pref_hint_store, MemOperand(a0, 4 * pref_chunk));
+ __ Pref(pref_hint_store, MemOperand(a0, 5 * pref_chunk));
+
+ __ bind(&ua_skip_pref);
+ __ lwl(t4, MemOperand(a1, 4, loadstore_chunk));
+ __ lwl(t5, MemOperand(a1, 5, loadstore_chunk));
+ __ lwl(t6, MemOperand(a1, 6, loadstore_chunk));
+ __ lwl(t7, MemOperand(a1, 7, loadstore_chunk));
+ __ lwr(t0,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t1,
+ MemOperand(a1, 2, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t2,
+ MemOperand(a1, 3, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t3,
+ MemOperand(a1, 4, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t4,
+ MemOperand(a1, 5, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t5,
+ MemOperand(a1, 6, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t6,
+ MemOperand(a1, 7, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t7,
+ MemOperand(a1, 8, loadstore_chunk, MemOperand::offset_minus_one));
}
- __ lwr(t3, MemOperand(a1, 3, loadstore_chunk)); // Maybe in delay slot.
-
- __ Pref(pref_hint_store, MemOperand(a0, 4 * pref_chunk));
- __ Pref(pref_hint_store, MemOperand(a0, 5 * pref_chunk));
-
- __ bind(&ua_skip_pref);
- __ lwr(t4, MemOperand(a1, 4, loadstore_chunk));
- __ lwr(t5, MemOperand(a1, 5, loadstore_chunk));
- __ lwr(t6, MemOperand(a1, 6, loadstore_chunk));
- __ lwr(t7, MemOperand(a1, 7, loadstore_chunk));
- __ lwl(t0,
- MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t1,
- MemOperand(a1, 2, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t2,
- MemOperand(a1, 3, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t3,
- MemOperand(a1, 4, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t4,
- MemOperand(a1, 5, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t5,
- MemOperand(a1, 6, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t6,
- MemOperand(a1, 7, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t7,
- MemOperand(a1, 8, loadstore_chunk, MemOperand::offset_minus_one));
__ Pref(pref_hint_load, MemOperand(a1, 4 * pref_chunk));
__ sw(t0, MemOperand(a0));
__ sw(t1, MemOperand(a0, 1, loadstore_chunk));
@@ -400,30 +444,57 @@ OS::MemCopyUint8Function CreateMemCopyUint8Function(
__ sw(t5, MemOperand(a0, 5, loadstore_chunk));
__ sw(t6, MemOperand(a0, 6, loadstore_chunk));
__ sw(t7, MemOperand(a0, 7, loadstore_chunk));
- __ lwr(t0, MemOperand(a1, 8, loadstore_chunk));
- __ lwr(t1, MemOperand(a1, 9, loadstore_chunk));
- __ lwr(t2, MemOperand(a1, 10, loadstore_chunk));
- __ lwr(t3, MemOperand(a1, 11, loadstore_chunk));
- __ lwr(t4, MemOperand(a1, 12, loadstore_chunk));
- __ lwr(t5, MemOperand(a1, 13, loadstore_chunk));
- __ lwr(t6, MemOperand(a1, 14, loadstore_chunk));
- __ lwr(t7, MemOperand(a1, 15, loadstore_chunk));
- __ lwl(t0,
- MemOperand(a1, 9, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t1,
- MemOperand(a1, 10, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t2,
- MemOperand(a1, 11, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t3,
- MemOperand(a1, 12, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t4,
- MemOperand(a1, 13, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t5,
- MemOperand(a1, 14, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t6,
- MemOperand(a1, 15, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t7,
- MemOperand(a1, 16, loadstore_chunk, MemOperand::offset_minus_one));
+ if (kArchEndian == kLittle) {
+ __ lwr(t0, MemOperand(a1, 8, loadstore_chunk));
+ __ lwr(t1, MemOperand(a1, 9, loadstore_chunk));
+ __ lwr(t2, MemOperand(a1, 10, loadstore_chunk));
+ __ lwr(t3, MemOperand(a1, 11, loadstore_chunk));
+ __ lwr(t4, MemOperand(a1, 12, loadstore_chunk));
+ __ lwr(t5, MemOperand(a1, 13, loadstore_chunk));
+ __ lwr(t6, MemOperand(a1, 14, loadstore_chunk));
+ __ lwr(t7, MemOperand(a1, 15, loadstore_chunk));
+ __ lwl(t0,
+ MemOperand(a1, 9, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t1,
+ MemOperand(a1, 10, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t2,
+ MemOperand(a1, 11, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t3,
+ MemOperand(a1, 12, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t4,
+ MemOperand(a1, 13, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t5,
+ MemOperand(a1, 14, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t6,
+ MemOperand(a1, 15, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t7,
+ MemOperand(a1, 16, loadstore_chunk, MemOperand::offset_minus_one));
+ } else {
+ __ lwl(t0, MemOperand(a1, 8, loadstore_chunk));
+ __ lwl(t1, MemOperand(a1, 9, loadstore_chunk));
+ __ lwl(t2, MemOperand(a1, 10, loadstore_chunk));
+ __ lwl(t3, MemOperand(a1, 11, loadstore_chunk));
+ __ lwl(t4, MemOperand(a1, 12, loadstore_chunk));
+ __ lwl(t5, MemOperand(a1, 13, loadstore_chunk));
+ __ lwl(t6, MemOperand(a1, 14, loadstore_chunk));
+ __ lwl(t7, MemOperand(a1, 15, loadstore_chunk));
+ __ lwr(t0,
+ MemOperand(a1, 9, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t1,
+ MemOperand(a1, 10, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t2,
+ MemOperand(a1, 11, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t3,
+ MemOperand(a1, 12, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t4,
+ MemOperand(a1, 13, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t5,
+ MemOperand(a1, 14, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t6,
+ MemOperand(a1, 15, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t7,
+ MemOperand(a1, 16, loadstore_chunk, MemOperand::offset_minus_one));
+ }
__ Pref(pref_hint_load, MemOperand(a1, 5 * pref_chunk));
__ sw(t0, MemOperand(a0, 8, loadstore_chunk));
__ sw(t1, MemOperand(a0, 9, loadstore_chunk));
@@ -447,30 +518,57 @@ OS::MemCopyUint8Function CreateMemCopyUint8Function(
__ beq(a2, t8, &ua_chk1w);
__ nop(); // In delay slot.
- __ lwr(t0, MemOperand(a1));
- __ lwr(t1, MemOperand(a1, 1, loadstore_chunk));
- __ lwr(t2, MemOperand(a1, 2, loadstore_chunk));
- __ lwr(t3, MemOperand(a1, 3, loadstore_chunk));
- __ lwr(t4, MemOperand(a1, 4, loadstore_chunk));
- __ lwr(t5, MemOperand(a1, 5, loadstore_chunk));
- __ lwr(t6, MemOperand(a1, 6, loadstore_chunk));
- __ lwr(t7, MemOperand(a1, 7, loadstore_chunk));
- __ lwl(t0,
- MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t1,
- MemOperand(a1, 2, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t2,
- MemOperand(a1, 3, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t3,
- MemOperand(a1, 4, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t4,
- MemOperand(a1, 5, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t5,
- MemOperand(a1, 6, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t6,
- MemOperand(a1, 7, loadstore_chunk, MemOperand::offset_minus_one));
- __ lwl(t7,
- MemOperand(a1, 8, loadstore_chunk, MemOperand::offset_minus_one));
+ if (kArchEndian == kLittle) {
+ __ lwr(t0, MemOperand(a1));
+ __ lwr(t1, MemOperand(a1, 1, loadstore_chunk));
+ __ lwr(t2, MemOperand(a1, 2, loadstore_chunk));
+ __ lwr(t3, MemOperand(a1, 3, loadstore_chunk));
+ __ lwr(t4, MemOperand(a1, 4, loadstore_chunk));
+ __ lwr(t5, MemOperand(a1, 5, loadstore_chunk));
+ __ lwr(t6, MemOperand(a1, 6, loadstore_chunk));
+ __ lwr(t7, MemOperand(a1, 7, loadstore_chunk));
+ __ lwl(t0,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t1,
+ MemOperand(a1, 2, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t2,
+ MemOperand(a1, 3, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t3,
+ MemOperand(a1, 4, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t4,
+ MemOperand(a1, 5, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t5,
+ MemOperand(a1, 6, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t6,
+ MemOperand(a1, 7, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwl(t7,
+ MemOperand(a1, 8, loadstore_chunk, MemOperand::offset_minus_one));
+ } else {
+ __ lwl(t0, MemOperand(a1));
+ __ lwl(t1, MemOperand(a1, 1, loadstore_chunk));
+ __ lwl(t2, MemOperand(a1, 2, loadstore_chunk));
+ __ lwl(t3, MemOperand(a1, 3, loadstore_chunk));
+ __ lwl(t4, MemOperand(a1, 4, loadstore_chunk));
+ __ lwl(t5, MemOperand(a1, 5, loadstore_chunk));
+ __ lwl(t6, MemOperand(a1, 6, loadstore_chunk));
+ __ lwl(t7, MemOperand(a1, 7, loadstore_chunk));
+ __ lwr(t0,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t1,
+ MemOperand(a1, 2, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t2,
+ MemOperand(a1, 3, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t3,
+ MemOperand(a1, 4, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t4,
+ MemOperand(a1, 5, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t5,
+ MemOperand(a1, 6, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t6,
+ MemOperand(a1, 7, loadstore_chunk, MemOperand::offset_minus_one));
+ __ lwr(t7,
+ MemOperand(a1, 8, loadstore_chunk, MemOperand::offset_minus_one));
+ }
__ addiu(a1, a1, 8 * loadstore_chunk);
__ sw(t0, MemOperand(a0));
__ sw(t1, MemOperand(a0, 1, loadstore_chunk));
@@ -491,9 +589,15 @@ OS::MemCopyUint8Function CreateMemCopyUint8Function(
__ addu(a3, a0, a3);
__ bind(&ua_wordCopy_loop);
- __ lwr(v1, MemOperand(a1));
- __ lwl(v1,
- MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ if (kArchEndian == kLittle) {
+ __ lwr(v1, MemOperand(a1));
+ __ lwl(v1,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ } else {
+ __ lwl(v1, MemOperand(a1));
+ __ lwr(v1,
+ MemOperand(a1, 1, loadstore_chunk, MemOperand::offset_minus_one));
+ }
__ addiu(a0, a0, loadstore_chunk);
__ addiu(a1, a1, loadstore_chunk);
__ bne(a0, a3, &ua_wordCopy_loop);
@@ -722,8 +826,8 @@ void ElementsTransitionGenerator::GenerateSmiToDouble(
__ LoadRoot(at, Heap::kTheHoleValueRootIndex);
__ Assert(eq, kObjectFoundInSmiOnlyArray, at, Operand(t5));
}
- __ sw(t0, MemOperand(t3)); // mantissa
- __ sw(t1, MemOperand(t3, kIntSize)); // exponent
+ __ sw(t0, MemOperand(t3, Register::kMantissaOffset)); // mantissa
+ __ sw(t1, MemOperand(t3, Register::kExponentOffset)); // exponent
__ Addu(t3, t3, kDoubleSize);
__ bind(&entry);
@@ -773,7 +877,9 @@ void ElementsTransitionGenerator::GenerateDoubleToObject(
__ sw(t5, MemOperand(t2, HeapObject::kMapOffset));
// Prepare for conversion loop.
- __ Addu(t0, t0, Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag + 4));
+ __ Addu(t0, t0, Operand(
+ FixedDoubleArray::kHeaderSize - kHeapObjectTag
+ + Register::kExponentOffset));
__ Addu(a3, t2, Operand(FixedArray::kHeaderSize));
__ Addu(t2, t2, Operand(kHeapObjectTag));
__ sll(t1, t1, 1);
@@ -782,7 +888,8 @@ void ElementsTransitionGenerator::GenerateDoubleToObject(
__ LoadRoot(t5, Heap::kHeapNumberMapRootIndex);
// Using offsetted addresses.
// a3: begin of destination FixedArray element fields, not tagged
- // t0: begin of source FixedDoubleArray element fields, not tagged, +4
+ // t0: begin of source FixedDoubleArray element fields, not tagged,
+ // points to the exponent
// t1: end of destination FixedArray, not tagged
// t2: destination FixedArray
// t3: the-hole pointer
@@ -805,7 +912,9 @@ void ElementsTransitionGenerator::GenerateDoubleToObject(
// Non-hole double, copy value into a heap number.
__ AllocateHeapNumber(a2, a0, t6, t5, &gc_required);
// a2: new heap number
- __ lw(a0, MemOperand(t0, -12));
+ // Load mantissa of current element, t0 point to exponent of next element.
+ __ lw(a0, MemOperand(t0, (Register::kMantissaOffset
+ - Register::kExponentOffset - kDoubleSize)));
__ sw(a0, FieldMemOperand(a2, HeapNumber::kMantissaOffset));
__ sw(a1, FieldMemOperand(a2, HeapNumber::kExponentOffset));
__ mov(a0, a3);
@@ -1010,8 +1119,8 @@ void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
__ li(temp3, Operand(ExternalReference::math_exp_log_table()));
__ sll(at, temp2, 3);
__ Addu(temp3, temp3, Operand(at));
- __ lw(temp2, MemOperand(temp3, 0));
- __ lw(temp3, MemOperand(temp3, kPointerSize));
+ __ lw(temp2, MemOperand(temp3, Register::kMantissaOffset));
+ __ lw(temp3, MemOperand(temp3, Register::kExponentOffset));
// The first word is loaded is the lower number register.
if (temp2.code() < temp3.code()) {
__ sll(at, temp1, 20);
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