diff --git a/Make.inc b/Make.inc
index adeb33d..1556c60 100644
--- a/Make.inc
+++ b/Make.inc
@@ -131,6 +131,10 @@ ifeq ($(ARCH),wasm32)
 CFLAGS_arch += -ffreestanding -nostdlib -nostdinc --target=wasm32-unknown-unknown
 endif
 
+ifeq ($(ARCH),sh3eb)
+CFLAGS_arch += -ffreestanding -nostdlib -m3 -mb
+endif
+
 # Add our "arch"-related FLAGS in.  We separate arch-related flags out so that
 # we can conveniently get at them for targets that don't want the rest of
 # *FLAGS_add, such as the testing Makefile targets
diff --git a/Makefile b/Makefile
index 865123e..149fe45 100644
--- a/Makefile
+++ b/Makefile
@@ -53,7 +53,7 @@ endif
 
 
 OLM_LIBS := libopenlibm.a
-ifneq ($(ARCH), wasm32)
+ifeq ($(filter wasm32 sh3eb,$(ARCH)),)
 OLM_LIBS += libopenlibm.$(OLM_MAJOR_MINOR_SHLIB_EXT)
 endif
 
diff --git a/include/openlibm_fenv.h b/include/openlibm_fenv.h
index c052d2d..5439dbf 100644
--- a/include/openlibm_fenv.h
+++ b/include/openlibm_fenv.h
@@ -14,6 +14,8 @@
 #include <openlibm_fenv_mips.h>
 #elif defined(__s390__)
 #include <openlibm_fenv_s390.h>
+#elif defined(__sh3__)
+#include <openlibm_fenv_sh3eb.h>
 #else
 #error "Unsupported platform"
 #endif
diff --git a/sh3eb/Make.files b/sh3eb/Make.files
new file mode 100644
index 0000000..483a7cc
--- /dev/null
+++ b/sh3eb/Make.files
@@ -0,0 +1 @@
+$(CUR_SRCS) = fenv.c
diff --git a/sh3eb/assert.h b/sh3eb/assert.h
new file mode 100644
index 0000000..f0bda9d
--- /dev/null
+++ b/sh3eb/assert.h
@@ -0,0 +1,2 @@
+#pragma once
+#define assert(b)
diff --git a/sh3eb/ctype.h b/sh3eb/ctype.h
new file mode 100644
index 0000000..76aec7b
--- /dev/null
+++ b/sh3eb/ctype.h
@@ -0,0 +1,7 @@
+#pragma once
+
+static int isxdigit(int c)
+{
+	return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') ||
+		(c >= 'a' && c <= 'f');
+}
diff --git a/sh3eb/string.h b/sh3eb/string.h
new file mode 100644
index 0000000..99047b5
--- /dev/null
+++ b/sh3eb/string.h
@@ -0,0 +1,4 @@
+#pragma once
+#include <stddef.h>
+
+void *memset(void *mem, int fill, size_t size);
diff --git a/src/fpmath.h b/src/fpmath.h
index 61d2288..2052b22 100644
--- a/src/fpmath.h
+++ b/src/fpmath.h
@@ -43,6 +43,8 @@
 #include "mips_fpmath.h"
 #elif defined(__s390__)
 #include "s390_fpmath.h"
+#elif defined(__sh3__)
+#include "sh3eb_fpmath.h"
 #endif
 
 /* Definitions provided directly by GCC and Clang. */
diff --git a/src/sh3eb_fpmath.h b/src/sh3eb_fpmath.h
index 50f119f..babae44 100644
--- a/src/sh3eb_fpmath.h
+++ b/src/sh3eb_fpmath.h
@@ -29,7 +29,7 @@
 union IEEEl2bits {
 	long double	e;
 	struct {
-#ifndef __MIPSEB__
+#ifndef __BIG_ENDIAN__
 		unsigned int	manl	:32;
 		unsigned int	manh	:20;
 		unsigned int	exp	:11;