diff --git a/js/src/jit/CacheIRCompiler.cpp b/js/src/jit/CacheIRCompiler.cpp
index 2bcdd84d54d3..e4d710733f9b 100644
--- a/js/src/jit/CacheIRCompiler.cpp
+++ b/js/src/jit/CacheIRCompiler.cpp
@@ -53,6 +53,7 @@
 #include "jit/SharedICHelpers-inl.h"
 #include "jit/VMFunctionList-inl.h"
 
+
 using namespace js;
 using namespace js::jit;
 
@@ -6600,6 +6601,11 @@ bool CacheIRCompiler::emitComparePointerResultShared(JSOp op,
                                                      TypedOperandId lhsId,
                                                      TypedOperandId rhsId) {
   JitSpew(JitSpew_Codegen, "%s", __FUNCTION__);
+#ifdef JS_CACHET
+  if (isCachetEnabled_) {
+    cachet::Impl_CacheIR::Op_ComparePointerResult(cachet::CachetContext {this, cx_}, masm, op, lhsId, rhsId);
+  } else {
+#endif
   AutoOutputRegister output(*this);
 
   Register left = allocator.useRegister(masm, lhsId);
@@ -6617,6 +6623,9 @@ bool CacheIRCompiler::emitComparePointerResultShared(JSOp op,
   masm.bind(&ifTrue);
   EmitStoreBoolean(masm, true, output);
   masm.bind(&done);
+#ifdef JS_CACHET
+  }
+#endif
   return true;
 }
 
@@ -6662,6 +6671,11 @@ bool CacheIRCompiler::emitCompareInt32Result(JSOp op, Int32OperandId lhsId,
 bool CacheIRCompiler::emitCompareDoubleResult(JSOp op, NumberOperandId lhsId,
                                               NumberOperandId rhsId) {
   JitSpew(JitSpew_Codegen, "%s", __FUNCTION__);
+#ifdef JS_CACHET
+  if (isCachetEnabled_) {
+    cachet::Impl_CacheIR::Op_CompareDoubleResult(cachet::CachetContext {this, cx_}, masm, op, lhsId, rhsId);
+  } else {
+#endif
   AutoOutputRegister output(*this);
 
   // Float register must be preserved. The Compare ICs use the fact that
@@ -6686,6 +6700,9 @@ bool CacheIRCompiler::emitCompareDoubleResult(JSOp op, NumberOperandId lhsId,
   masm.bind(&ifTrue);
   EmitStoreBoolean(masm, true, output);
   masm.bind(&done);
+#ifdef JS_CACHET
+  }
+#endif
   return true;
 }
 
diff --git a/js/src/jit/CachetCompiler.cpp b/js/src/jit/CachetCompiler.cpp
index 22d4512e98c6..00ef4a427fc4 100644
--- a/js/src/jit/CachetCompiler.cpp
+++ b/js/src/jit/CachetCompiler.cpp
@@ -1365,6 +1365,15 @@ void EmitOp_BranchTest32Imm(Cachet_ContextRef cx,
   ops.branchTest32(param_condition, param_lhsReg, Imm32(param_rhsInt32), param_branch);
 }
 
+void EmitOp_BranchDouble(Cachet_ContextRef cx,
+                         IR_MASM::OpsRef ops,
+                         Type_DoubleCondition::Ref param_condition,
+                         Type_FloatReg::Ref param_lhsReg,
+                         Type_FloatReg::Ref param_rhsReg,
+                         IR_MASM::LabelRef param_branch) {
+  ops.branchDouble(param_condition, param_lhsReg, param_rhsReg, param_branch);
+}
+
 void EmitOp_BranchAdd32(Cachet_ContextRef cx,
                                          IR_MASM::OpsRef ops,
                                          Type_Condition::Ref param_condition,
@@ -1608,6 +1617,11 @@ Type_ValueReg::Val Fn_useValueId(Cachet_ContextRef cx, IR_MASM::OpsRef ops,
   return detail::CompilerInternals::allocator(cx).useValueRegister(ops, param_valueId);
 }
 
+Type_Reg::Val Fn_useTypedId(Cachet_ContextRef cx, IR_MASM::OpsRef ops,
+                            Type_TypedId::Ref param_typedId) {
+  return detail::CompilerInternals::allocator(cx).useRegister(ops, param_typedId);
+}
+
 Type_Reg::Val Fn_useObjectId(Cachet_ContextRef cx, IR_MASM::OpsRef ops,
                              Type_ObjectId::Ref param_objectId) {
   return detail::CompilerInternals::allocator(cx).useRegister(ops, param_objectId);
@@ -1707,6 +1721,10 @@ Type_Bool::Val Fn_objectGuardNeedsSpectreMitigations(
   return detail::CompilerInternals::objectGuardNeedsSpectreMitigations(cx, param_objectId);
 }
 
+void Fn_ensureDoubleRegister(Cachet_ContextRef cx, IR_MASM::OpsRef ops, Type_NumberId::Ref op, Type_FloatReg::Ref dest) {
+  detail::CompilerInternals::allocator(cx).ensureDoubleRegister(detail::CompilerInternals::masm(cx), op, dest);
+}
+
 };  // namespace Impl_CacheIR
 
 Type_Bool::Val Fn_isCacheableProtoChain(Cachet_ContextRef cx,
diff --git a/js/src/jit/CachetCompiler.h b/js/src/jit/CachetCompiler.h
index f2e5157ca682..36c70b5bc582 100644
--- a/js/src/jit/CachetCompiler.h
+++ b/js/src/jit/CachetCompiler.h
@@ -254,6 +254,7 @@ using Type_GeneralRegSet = PrimitiveType<GeneralRegisterSet>;
 using Type_FloatRegSet = PrimitiveType<FloatRegisterSet>;
 using Type_LiveRegSet = PrimitiveType<LiveRegisterSet>;
 using Type_Condition = PrimitiveType<Assembler::Condition>;
+using Type_DoubleCondition = PrimitiveType<Assembler::DoubleCondition>;
 using Type_Address = StructType<js::jit::Address>;
 using Type_Scale = PrimitiveType<js::jit::Scale>;
 using Type_BaseIndex = StructType<js::jit::BaseIndex>;
@@ -674,6 +675,10 @@ inline Type_PhyFloatReg::Ref Variant_Xmm0(Cachet_ContextRef cx) {
   return X86Encoding::xmm0;
 }
 
+inline Type_PhyFloatReg::Ref Variant_Xmm1(Cachet_ContextRef cx) {
+  return X86Encoding::xmm1;
+}
+
 inline Type_PhyFloatReg::Ref Variant_Xmm15(Cachet_ContextRef cx) {
   return X86Encoding::xmm15;
 }
@@ -760,6 +765,66 @@ inline Type_Condition::Ref Variant_BelowOrEqual(Cachet_ContextRef cx) {
 
 };  // namespace Impl_Condition
 
+namespace Impl_DoubleCondition {
+
+inline Type_DoubleCondition::Ref Variant_Ordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleOrdered;
+}
+
+inline Type_DoubleCondition::Ref Variant_Equal(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleEqual;
+}
+
+inline Type_DoubleCondition::Ref Variant_NotEqual(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleNotEqual;
+}
+
+inline Type_DoubleCondition::Ref Variant_GreaterThan(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleGreaterThan;
+}
+
+inline Type_DoubleCondition::Ref Variant_GreaterThanOrEqual(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleGreaterThanOrEqual;
+}
+
+inline Type_DoubleCondition::Ref Variant_LessThan(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleLessThan;
+}
+
+inline Type_DoubleCondition::Ref Variant_LessThanOrEqual(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleLessThanOrEqual;
+}
+
+inline Type_DoubleCondition::Ref Variant_Unordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleUnordered;
+}
+
+inline Type_DoubleCondition::Ref Variant_EqualOrUnordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleEqualOrUnordered;
+}
+
+inline Type_DoubleCondition::Ref Variant_NotEqualOrUnordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleNotEqualOrUnordered;
+}
+
+inline Type_DoubleCondition::Ref Variant_GreaterThanOrUnordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleGreaterThanOrUnordered;
+}
+
+inline Type_DoubleCondition::Ref Variant_GreaterThanOrEqualOrUnordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleGreaterThanOrEqualOrUnordered;
+}
+
+inline Type_DoubleCondition::Ref Variant_LessThanOrUnordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleLessThanOrUnordered;
+}
+
+inline Type_DoubleCondition::Ref Variant_LessThanOrEqualOrUnordered(Cachet_ContextRef cx) {
+  return Assembler::DoubleCondition::DoubleLessThanOrEqualOrUnordered;
+}
+
+}; // namespace Impl_DoubleCondition
+
 namespace Impl_Scale {
 
 inline Type_Scale::Ref Variant_TimesOne(Cachet_ContextRef cx) {
diff --git a/js/src/jit/GenerateCachetFiles.py b/js/src/jit/GenerateCachetFiles.py
index 921612adf6bb..3e1b0964ebfe 100755
--- a/js/src/jit/GenerateCachetFiles.py
+++ b/js/src/jit/GenerateCachetFiles.py
@@ -24,7 +24,7 @@ def generate_cachet_impl(c_out, cachet_src):
         script_file_path = os.path.abspath(__file__)
         jit_dir_path = os.path.dirname(script_file_path)
         cachet_compiler_exe_path = os.path.abspath(os.path.join(jit_dir_path,
-            "..", "..", "..", "..", "cachet", "target", "debug", "cachet-compiler"))
+            "..", "..", "..", "..", "cachet", "target", "release", "cachet-compiler"))
         p = subprocess.Popen([cachet_compiler_exe_path, cachet_src, "--cpp-decls", h_tmp,
             "--cpp-defs", inc_tmp], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 
diff --git a/js/src/jit/cachet/CacheIR.cachet b/js/src/jit/cachet/CacheIR.cachet
index 3e7bdffa7d6a..bc5f6a7b0b86 100644
--- a/js/src/jit/cachet/CacheIR.cachet
+++ b/js/src/jit/cachet/CacheIR.cachet
@@ -1239,6 +1239,22 @@ ir CacheIR emits MASM {
         bind done;
     }
 
+    op ComparePointerResult(jsop: JSOp, lhsId: TypedId, rhsId: TypedId) {
+        let lhsReg = CacheIR::useTypedId(lhsId);
+        let rhsReg = CacheIR::useTypedId(rhsId);
+
+        label ifTrue: MASM;
+        label done: MASM;
+
+        emit MASM::Branch32(Condition::fromJSOp(jsop, true), lhsReg, rhsReg, ifTrue);
+        CacheIR::emitStoreBool(false, CacheIR::outputReg);
+        emit MASM::Jump(done);
+
+        bind ifTrue;
+        CacheIR::emitStoreBool(true, CacheIR::outputReg);
+        bind done;
+    }
+
     op CompareNullUndefinedResult(jsop: JSOp, isUndefined: Bool, inputId: ValueId) {
         let inputReg = CacheIR::useValueId(inputId);
         let scratchReg = CacheIR::allocateReg();
@@ -1318,6 +1334,31 @@ ir CacheIR emits MASM {
 
     }
 
+    op CompareDoubleResult(jsop: JSOp, lhsId: NumberId, rhsId: NumberId) {
+        // TODO(jlwoodwa): elided AutoAvailableFloatRegister; check that this is safe
+        let floatScratch0 = FloatReg::floatReg0();
+        let floatScratch1 = FloatReg::floatReg1();
+
+        // let failure = CacheIR::addFailurePath();
+        // TODO(jlwoodwa): is this as pointless as it looks?
+
+        CacheIR::ensureDoubleRegister(lhsId, floatScratch0);
+        CacheIR::ensureDoubleRegister(rhsId, floatScratch1);
+
+        label ifTrue: MASM;
+        label done: MASM;
+
+        emit MASM::BranchDouble(DoubleCondition::fromJSOp(jsop), floatScratch0, floatScratch1, ifTrue);
+        CacheIR::emitStoreBool(false, CacheIR::outputReg);
+        emit MASM::Jump(done);
+
+        bind ifTrue;
+        CacheIR::emitStoreBool(true, CacheIR::outputReg);
+        bind done;
+
+        // CacheIR::releaseFailurePath();
+    }
+
     op Int32AddResult(lhsId: Int32Id, rhsId: Int32Id) {
         let lhsReg = CacheIR::useInt32Id(lhsId);
         let rhsReg = CacheIR::useInt32Id(rhsId);
diff --git a/js/src/jit/cachet/MacroAssembler.cachet b/js/src/jit/cachet/MacroAssembler.cachet
index 76480c20b045..6ac7e975de6b 100644
--- a/js/src/jit/cachet/MacroAssembler.cachet
+++ b/js/src/jit/cachet/MacroAssembler.cachet
@@ -118,6 +118,10 @@ impl FloatReg {
         FloatReg::newDouble(PhyFloatReg::Xmm0)
     }
 
+    fn floatReg1() -> FloatReg {
+        FloatReg::newDouble(PhyFloatReg::Xmm1)
+    }
+
     fn doubleScratchReg() -> FloatReg {
         FloatReg::newDouble(PhyFloatReg::Xmm15)
     }
@@ -623,6 +627,43 @@ impl Condition {
     }
 }
 
+enum DoubleCondition {
+    Ordered,
+    Equal,
+    NotEqual,
+    GreaterThan,
+    GreaterThanOrEqual,
+    LessThan,
+    LessThanOrEqual,
+    Unordered,
+    EqualOrUnordered,
+    NotEqualOrUnordered,
+    GreaterThanOrUnordered,
+    GreaterThanOrEqualOrUnordered,
+    LessThanOrUnordered,
+    LessThanOrEqualOrUnordered,
+}
+
+impl DoubleCondition {
+    fn fromJSOp(jsop: JSOp) -> DoubleCondition {
+        if jsop == JSOp::Eq || jsop == JSOp::StrictEq {
+            return DoubleCondition::Equal;
+        } else if jsop == JSOp::Ne || jsop == JSOp::StrictNe {
+            return DoubleCondition::NotEqualOrUnordered;
+        } else if jsop == JSOp::Lt {
+            return DoubleCondition::LessThan;
+        } else if jsop == JSOp::Le {
+            return DoubleCondition::LessThanOrEqual;
+        } else if jsop == JSOp::Gt {
+            return DoubleCondition::GreaterThan;
+        } else if jsop == JSOp::Ge {
+            return DoubleCondition::GreaterThanOrEqual;
+        }
+        assert false;
+        return DoubleCondition::Ordered; // TODO(jlwoodwa): this workaround should not be necessary
+    }
+}
+
 struct Address {
     base: Reg,
     offset: Int32,
@@ -1750,6 +1791,71 @@ ir MASM {
         }
     }
 
+    op BranchDouble(condition: DoubleCondition, lhs: FloatReg, rhs: FloatReg, label branch: MASM) {
+        let lhsDouble = MASM::getDouble(lhs);
+        let rhsDouble = MASM::getDouble(rhs);
+
+        if condition == DoubleCondition::Ordered {
+            if Float64::ordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::Equal {
+            if Float64::equal(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::NotEqual {
+            if Float64::notEqual(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::GreaterThan {
+            if Float64::greaterThan(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::GreaterThanOrEqual {
+            if Float64::greaterThanOrEqual(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::LessThan {
+            if Float64::lessThan(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::LessThanOrEqual {
+            if Float64::lessThanOrEqual(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::Unordered {
+            if Float64::unordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::EqualOrUnordered {
+            if Float64::equalOrUnordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::NotEqualOrUnordered {
+            if Float64::notEqualOrUnordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::GreaterThanOrUnordered {
+            if Float64::greaterThanOrUnordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::GreaterThanOrEqualOrUnordered {
+            if Float64::greaterThanOrEqualOrUnordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::LessThanOrUnordered {
+            if Float64::lessThanOrUnordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else if condition == DoubleCondition::LessThanOrEqualOrUnordered {
+            if Float64::lessThanOrEqualOrUnordered(lhsDouble, rhsDouble) {
+                goto branch;
+            }
+        } else {
+            assert false;
+        }
+    }
+
     op BranchAdd32(condition: Condition, srcReg: Reg, dstReg: Reg, label branch: MASM) {
         let lhsInt32 = MASM::getInt32(srcReg);
         let rhsInt32 = MASM::getInt32(dstReg);
diff --git a/js/src/jit/cachet/VM.cachet b/js/src/jit/cachet/VM.cachet
index cf8d22a63ca5..f7c64ae37df2 100644
--- a/js/src/jit/cachet/VM.cachet
+++ b/js/src/jit/cachet/VM.cachet
@@ -327,6 +327,21 @@ impl Float64 {
     }
 
     unsafe fn fromUInt32Unchecked(uint32: UInt32) -> Float64;
+
+    fn ordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn equal(lhs: Float64, rhs: Float64) -> Bool;
+    fn notEqual(lhs: Float64, rhs: Float64) -> Bool;
+    fn greaterThan(lhs: Float64, rhs: Float64) -> Bool;
+    fn greaterThanOrEqual(lhs: Float64, rhs: Float64) -> Bool;
+    fn lessThan(lhs: Float64, rhs: Float64) -> Bool;
+    fn lessThanOrEqual(lhs: Float64, rhs: Float64) -> Bool;
+    fn unordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn equalOrUnordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn notEqualOrUnordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn greaterThanOrUnordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn greaterThanOrEqualOrUnordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn lessThanOrUnordered(lhs: Float64, rhs: Float64) -> Bool;
+    fn lessThanOrEqualOrUnordered(lhs: Float64, rhs: Float64) -> Bool;
 }
 
 struct Simd128;