summaryrefslogtreecommitdiffstats
path: root/js/src/jit/mips64/SharedIC-mips64.cpp
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /js/src/jit/mips64/SharedIC-mips64.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'js/src/jit/mips64/SharedIC-mips64.cpp')
-rw-r--r--js/src/jit/mips64/SharedIC-mips64.cpp191
1 files changed, 191 insertions, 0 deletions
diff --git a/js/src/jit/mips64/SharedIC-mips64.cpp b/js/src/jit/mips64/SharedIC-mips64.cpp
new file mode 100644
index 000000000..ee325277f
--- /dev/null
+++ b/js/src/jit/mips64/SharedIC-mips64.cpp
@@ -0,0 +1,191 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "jsiter.h"
+
+#include "jit/BaselineCompiler.h"
+#include "jit/BaselineIC.h"
+#include "jit/BaselineJIT.h"
+#include "jit/Linker.h"
+#include "jit/SharedICHelpers.h"
+
+#include "jsboolinlines.h"
+
+using namespace js;
+using namespace js::jit;
+
+namespace js {
+namespace jit {
+
+// ICBinaryArith_Int32
+
+bool
+ICBinaryArith_Int32::Compiler::generateStubCode(MacroAssembler& masm)
+{
+ // Guard that R0 is an integer and R1 is an integer.
+ Label failure;
+ masm.branchTestInt32(Assembler::NotEqual, R0, &failure);
+ masm.branchTestInt32(Assembler::NotEqual, R1, &failure);
+
+ // Add R0 and R1. Don't need to explicitly unbox, just use R2's valueReg.
+ Register scratchReg = R2.valueReg();
+
+ Label goodMul, divTest1, divTest2;
+ switch(op_) {
+ case JSOP_ADD:
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ masm.ma_addTestOverflow(scratchReg, ExtractTemp0, ExtractTemp1, &failure);
+ masm.boxValue(JSVAL_TYPE_INT32, scratchReg, R0.valueReg());
+ break;
+ case JSOP_SUB:
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ masm.ma_subTestOverflow(scratchReg, ExtractTemp0, ExtractTemp1, &failure);
+ masm.boxValue(JSVAL_TYPE_INT32, scratchReg, R0.valueReg());
+ break;
+ case JSOP_MUL: {
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ masm.ma_mul_branch_overflow(scratchReg, ExtractTemp0, ExtractTemp1, &failure);
+
+ masm.ma_b(scratchReg, Imm32(0), &goodMul, Assembler::NotEqual, ShortJump);
+
+ // Result is -0 if operands have different signs.
+ masm.as_xor(t8, ExtractTemp0, ExtractTemp1);
+ masm.ma_b(t8, Imm32(0), &failure, Assembler::LessThan, ShortJump);
+
+ masm.bind(&goodMul);
+ masm.boxValue(JSVAL_TYPE_INT32, scratchReg, R0.valueReg());
+ break;
+ }
+ case JSOP_DIV:
+ case JSOP_MOD: {
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ // Check for INT_MIN / -1, it results in a double.
+ masm.ma_b(ExtractTemp0, Imm32(INT_MIN), &divTest1, Assembler::NotEqual, ShortJump);
+ masm.ma_b(ExtractTemp1, Imm32(-1), &failure, Assembler::Equal, ShortJump);
+ masm.bind(&divTest1);
+
+ // Check for division by zero
+ masm.ma_b(ExtractTemp1, Imm32(0), &failure, Assembler::Equal, ShortJump);
+
+ // Check for 0 / X with X < 0 (results in -0).
+ masm.ma_b(ExtractTemp0, Imm32(0), &divTest2, Assembler::NotEqual, ShortJump);
+ masm.ma_b(ExtractTemp1, Imm32(0), &failure, Assembler::LessThan, ShortJump);
+ masm.bind(&divTest2);
+
+ masm.as_div(ExtractTemp0, ExtractTemp1);
+
+ if (op_ == JSOP_DIV) {
+ // Result is a double if the remainder != 0.
+ masm.as_mfhi(scratchReg);
+ masm.ma_b(scratchReg, Imm32(0), &failure, Assembler::NotEqual, ShortJump);
+ masm.as_mflo(scratchReg);
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ } else {
+ Label done;
+ // If X % Y == 0 and X < 0, the result is -0.
+ masm.as_mfhi(scratchReg);
+ masm.ma_b(scratchReg, Imm32(0), &done, Assembler::NotEqual, ShortJump);
+ masm.ma_b(ExtractTemp0, Imm32(0), &failure, Assembler::LessThan, ShortJump);
+ masm.bind(&done);
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ }
+ break;
+ }
+ case JSOP_BITOR:
+ masm.as_or(R0.valueReg() , R0.valueReg(), R1.valueReg());
+ break;
+ case JSOP_BITXOR:
+ masm.as_xor(scratchReg, R0.valueReg(), R1.valueReg());
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ break;
+ case JSOP_BITAND:
+ masm.as_and(R0.valueReg() , R0.valueReg(), R1.valueReg());
+ break;
+ case JSOP_LSH:
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ // MIPS will only use 5 lowest bits in R1 as shift offset.
+ masm.ma_sll(scratchReg, ExtractTemp0, ExtractTemp1);
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ break;
+ case JSOP_RSH:
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ masm.ma_sra(scratchReg, ExtractTemp0, ExtractTemp1);
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ break;
+ case JSOP_URSH:
+ masm.unboxInt32(R0, ExtractTemp0);
+ masm.unboxInt32(R1, ExtractTemp1);
+ masm.ma_srl(scratchReg, ExtractTemp0, ExtractTemp1);
+ if (allowDouble_) {
+ Label toUint;
+ masm.ma_b(scratchReg, Imm32(0), &toUint, Assembler::LessThan, ShortJump);
+
+ // Move result and box for return.
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ EmitReturnFromIC(masm);
+
+ masm.bind(&toUint);
+ masm.convertUInt32ToDouble(scratchReg, FloatReg1);
+ masm.boxDouble(FloatReg1, R0);
+ } else {
+ masm.ma_b(scratchReg, Imm32(0), &failure, Assembler::LessThan, ShortJump);
+ // Move result for return.
+ masm.tagValue(JSVAL_TYPE_INT32, scratchReg, R0);
+ }
+ break;
+ default:
+ MOZ_CRASH("Unhandled op for BinaryArith_Int32.");
+ }
+
+ EmitReturnFromIC(masm);
+
+ // Failure case - jump to next stub
+ masm.bind(&failure);
+ EmitStubGuardFailure(masm);
+
+ return true;
+}
+
+bool
+ICUnaryArith_Int32::Compiler::generateStubCode(MacroAssembler& masm)
+{
+ Label failure;
+ masm.branchTestInt32(Assembler::NotEqual, R0, &failure);
+
+ switch (op) {
+ case JSOP_BITNOT:
+ masm.not32(R0.valueReg());
+ masm.tagValue(JSVAL_TYPE_INT32, R0.valueReg(), R0);
+ break;
+ case JSOP_NEG:
+ masm.unboxInt32(R0, ExtractTemp0);
+ // Guard against 0 and MIN_INT, both result in a double.
+ masm.branchTest32(Assembler::Zero, ExtractTemp0, Imm32(INT32_MAX), &failure);
+
+ masm.neg32(ExtractTemp0);
+ masm.tagValue(JSVAL_TYPE_INT32, ExtractTemp0, R0);
+ break;
+ default:
+ MOZ_CRASH("Unexpected op");
+ return false;
+ }
+
+ EmitReturnFromIC(masm);
+
+ masm.bind(&failure);
+ EmitStubGuardFailure(masm);
+ return true;
+}
+
+
+} // namespace jit
+} // namespace js