diff --git a/flang/lib/Lower/IntrinsicCall.cpp b/flang/lib/Lower/IntrinsicCall.cpp
--- a/flang/lib/Lower/IntrinsicCall.cpp
+++ b/flang/lib/Lower/IntrinsicCall.cpp
@@ -486,9 +486,13 @@
   void genRandomInit(llvm::ArrayRef<fir::ExtendedValue>);
   void genRandomNumber(llvm::ArrayRef<fir::ExtendedValue>);
   void genRandomSeed(llvm::ArrayRef<fir::ExtendedValue>);
+  mlir::Value genRRSpacing(mlir::Type resultType,
+                           llvm::ArrayRef<mlir::Value> args);
   mlir::Value genSetExponent(mlir::Type resultType,
                              llvm::ArrayRef<mlir::Value> args);
   fir::ExtendedValue genSize(mlir::Type, llvm::ArrayRef<fir::ExtendedValue>);
+  mlir::Value genSpacing(mlir::Type resultType,
+                         llvm::ArrayRef<mlir::Value> args);
   fir::ExtendedValue genSum(mlir::Type, llvm::ArrayRef<fir::ExtendedValue>);
   void genSystemClock(llvm::ArrayRef<fir::ExtendedValue>);
   fir::ExtendedValue genTransfer(mlir::Type,
@@ -727,6 +731,7 @@
      &I::genRandomSeed,
      {{{"size", asBox}, {"put", asBox}, {"get", asBox}}},
      /*isElemental=*/false},
+    {"rrspacing", &I::genRRSpacing},
     {"set_exponent", &I::genSetExponent},
     {"size",
      &I::genSize,
@@ -734,6 +739,7 @@
        {"dim", asAddr, handleDynamicOptional},
        {"kind", asValue}}},
      /*isElemental=*/false},
+    {"spacing", &I::genSpacing},
     {"sum",
      &I::genSum,
      {{{"array", asBox},
@@ -2485,6 +2491,16 @@
   Fortran::lower::genRandomSeed(builder, loc, -1, mlir::Value{});
 }
 
+// RRSPACING
+mlir::Value IntrinsicLibrary::genRRSpacing(mlir::Type resultType,
+                                           llvm::ArrayRef<mlir::Value> args) {
+  assert(args.size() == 1);
+
+  return builder.createConvert(
+      loc, resultType,
+      fir::runtime::genRRSpacing(builder, loc, fir::getBase(args[0])));
+}
+
 // SET_EXPONENT
 mlir::Value IntrinsicLibrary::genSetExponent(mlir::Type resultType,
                                              llvm::ArrayRef<mlir::Value> args) {
@@ -2496,6 +2512,16 @@
                                    fir::getBase(args[1])));
 }
 
+// SPACING
+mlir::Value IntrinsicLibrary::genSpacing(mlir::Type resultType,
+                                         llvm::ArrayRef<mlir::Value> args) {
+  assert(args.size() == 1);
+
+  return builder.createConvert(
+      loc, resultType,
+      fir::runtime::genSpacing(builder, loc, fir::getBase(args[0])));
+}
+
 // SUM
 fir::ExtendedValue
 IntrinsicLibrary::genSum(mlir::Type resultType,
diff --git a/flang/test/Lower/Intrinsics/rrspacing.f90 b/flang/test/Lower/Intrinsics/rrspacing.f90
new file mode 100644
--- /dev/null
+++ b/flang/test/Lower/Intrinsics/rrspacing.f90
@@ -0,0 +1,11 @@
+! RUN: bbc -emit-fir %s -o - | FileCheck %s
+! RUN: %flang_fc1 -emit-fir %s -o - | FileCheck %s
+
+! CHECK-LABEL: func @_QPrrspacing_test2(
+! CHECK-SAME: %[[x:[^:]+]]: !fir.ref<f128>{{.*}}) -> f128
+real*16 function rrspacing_test2(x)
+  real*16 :: x
+  rrspacing_test2 = rrspacing(x)
+! CHECK: %[[a1:.*]] = fir.load %[[x]] : !fir.ref<f128>
+! CHECK: %{{.*}} = fir.call @_FortranARRSpacing16(%[[a1]]) : (f128) -> f128
+end function
diff --git a/flang/test/Lower/Intrinsics/spacing.f90 b/flang/test/Lower/Intrinsics/spacing.f90
new file mode 100644
--- /dev/null
+++ b/flang/test/Lower/Intrinsics/spacing.f90
@@ -0,0 +1,20 @@
+! RUN: bbc -emit-fir %s -o - | FileCheck %s
+! RUN: %flang_fc1 -emit-fir %s -o - | FileCheck %s
+
+! CHECK-LABEL: func @_QPspacing_test(
+! CHECK-SAME: %[[x:[^:]+]]: !fir.ref<f32>{{.*}}) -> f32
+real*4 function spacing_test(x)
+  real*4 :: x
+  spacing_test = spacing(x)
+! CHECK: %[[a1:.*]] = fir.load %[[x]] : !fir.ref<f32>
+! CHECK: %{{.*}} = fir.call @_FortranASpacing4(%[[a1]]) : (f32) -> f32
+end function
+
+! CHECK-LABEL: func @_QPspacing_test2(
+! CHECK-SAME: %[[x:[^:]+]]: !fir.ref<f80>{{.*}}) -> f80
+real*10 function spacing_test2(x)
+  real*10 :: x
+  spacing_test2 = spacing(x)
+! CHECK: %[[a1:.*]] = fir.load %[[x]] : !fir.ref<f80>
+! CHECK: %{{.*}} = fir.call @_FortranASpacing10(%[[a1]]) : (f80) -> f80
+end function