diff --git a/platforms/riscv32.xml b/platforms/riscv32.xml
new file mode 100644
index 00000000000..1ba1f7e431d
--- /dev/null
+++ b/platforms/riscv32.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<platform>
+  <char_bit>8</char_bit>
+  <default-sign>unsigned</default-sign>
+  <sizeof>
+    <bool>1</bool>
+    <short>2</short>
+    <int>4</int>
+    <long>4</long>
+    <long-long>8</long-long>
+    <float>4</float>
+    <double>8</double>
+    <long-double>16</long-double>
+    <pointer>4</pointer>
+    <size_t>4</size_t>
+    <wchar_t>4</wchar_t>
+  </sizeof>
+</platform>
diff --git a/platforms/riscv64.xml b/platforms/riscv64.xml
new file mode 100644
index 00000000000..818c2841580
--- /dev/null
+++ b/platforms/riscv64.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<platform>
+  <char_bit>8</char_bit>
+  <default-sign>unsigned</default-sign>
+  <sizeof>
+    <bool>1</bool>
+    <short>2</short>
+    <int>4</int>
+    <long>8</long>
+    <long-long>8</long-long>
+    <float>4</float>
+    <double>8</double>
+    <long-double>16</long-double>
+    <pointer>8</pointer>
+    <size_t>8</size_t>
+    <wchar_t>4</wchar_t>
+  </sizeof>
+</platform>