diff --git a/gcc-2.7.2-cdk-macos.sh b/gcc-2.7.2-cdk-macos.sh
index 0709a80..91deac1 100755
--- a/gcc-2.7.2-cdk-macos.sh
+++ b/gcc-2.7.2-cdk-macos.sh
@@ -82,6 +82,8 @@ make cpp cc1 xgcc cc1plus g++ \
 ./cc1 -quiet -O2 "$SCRIPT_DIR/tests/little_endian.c" -o little_endian.s
 grep -E 'lbu\s\$2,0\(\$4\)' little_endian.s
 ./cc1 -quiet -O2 "$SCRIPT_DIR/tests/section_attribute.c" -o /dev/null
+./cc1 -quiet -O2 "$SCRIPT_DIR/tests/host_wide_int.c" -o host_wide_int.s
+grep -E '# 0x80000000$' host_wide_int.s
 
 mkdir -p "$OUTDIR"
 cp cpp cc1 xgcc cc1plus g++ "$OUTDIR/"
diff --git a/gcc-2.7.2-cdk.Dockerfile b/gcc-2.7.2-cdk.Dockerfile
index ef2317e..37ff7a6 100644
--- a/gcc-2.7.2-cdk.Dockerfile
+++ b/gcc-2.7.2-cdk.Dockerfile
@@ -31,6 +31,7 @@ RUN make --jobs $(nproc) cpp cc1 xgcc cc1plus g++ CFLAGS="-std=gnu89 -m32 -stati
 COPY tests /work/tests
 RUN ./cc1 -quiet -O2 /work/tests/little_endian.c && grep -E 'lbu\s\$2,0\(\$4\)' /work/tests/little_endian.s
 RUN ./cc1 -quiet -O2 /work/tests/section_attribute.c
+RUN ./cc1 -quiet -O2 /work/tests/host_wide_int.c && grep -E '# 0x80000000$' /work/tests/host_wide_int.s
 
 RUN mv xgcc gcc
 RUN mkdir /build && cp cpp cc1 gcc cc1plus g++ /build/
diff --git a/gcc-2.7.2-psx-macos.sh b/gcc-2.7.2-psx-macos.sh
index 31d20be..888e883 100755
--- a/gcc-2.7.2-psx-macos.sh
+++ b/gcc-2.7.2-psx-macos.sh
@@ -71,7 +71,9 @@ make --jobs "$(sysctl -n hw.ncpu)" cpp cc1 xgcc cc1plus g++ \
 ./cc1 -quiet -O2 "$SCRIPT_DIR/tests/little_endian.c" -o little_endian.s
 grep -E 'lbu\s\$2,0\(\$4\)' little_endian.s
 ./cc1 -quiet -O2 "$SCRIPT_DIR/tests/section_attribute.c" -o /dev/null
-./cc1 -quiet -help </dev/null 2>&1 | grep -- -msoft-float
+./cc1 -quiet -O2 "$SCRIPT_DIR/tests/host_wide_int.c" -o host_wide_int.s
+grep -E '# 0x80000000$' host_wide_int.s
+./cc1 -quiet -help</dev/null 2>&1 | grep -- -msoft-float
 
 mkdir -p "$OUTDIR"
 cp cpp cc1 xgcc cc1plus g++ "$OUTDIR/"
diff --git a/gcc-2.7.2-psx.Dockerfile b/gcc-2.7.2-psx.Dockerfile
index 0cf30ef..7bc6bc2 100644
--- a/gcc-2.7.2-psx.Dockerfile
+++ b/gcc-2.7.2-psx.Dockerfile
@@ -37,7 +37,8 @@ RUN make --jobs $(nproc) cpp cc1 xgcc cc1plus g++ CFLAGS="-std=gnu89 -m32 -stati
 COPY tests /work/tests
 RUN ./cc1 -quiet -O2 /work/tests/little_endian.c && grep -E 'lbu\s\$2,0\(\$4\)' /work/tests/little_endian.s
 RUN ./cc1 -quiet -O2 /work/tests/section_attribute.c
-RUN ./cc1 -quiet -help </dev/null 2>&1 | grep -- -msoft-float
+RUN ./cc1 -quiet -O2 /work/tests/host_wide_int.c && grep -E '# 0x80000000$' /work/tests/host_wide_int.s
+RUN ./cc1 -quiet -help</dev/null 2>&1 | grep -- -msoft-float
 
 RUN mv xgcc gcc
 RUN mkdir /build && cp cpp cc1 gcc cc1plus g++ /build/
diff --git a/gcc-2.8.1-psx-macos.sh b/gcc-2.8.1-psx-macos.sh
index 961eca5..41f8a05 100755
--- a/gcc-2.8.1-psx-macos.sh
+++ b/gcc-2.8.1-psx-macos.sh
@@ -82,7 +82,9 @@ make --jobs "$(sysctl -n hw.ncpu)" cpp cc1 xgcc cc1plus g++ \
 ./cc1 -quiet -O2 "$SCRIPT_DIR/tests/little_endian.c" -o little_endian.s
 grep -E 'lbu\s\$2,0\(\$4\)' little_endian.s
 ./cc1 -quiet -O2 "$SCRIPT_DIR/tests/section_attribute.c" -o /dev/null
-./cc1 -version </dev/null 2>&1 | grep -- -msoft-float
+./cc1 -quiet -O2 "$SCRIPT_DIR/tests/host_wide_int.c" -o host_wide_int.s
+grep -E '# 0x80000000$' host_wide_int.s
+./cc1 -version</dev/null 2>&1 | grep -- -msoft-float
 ./cc1 -version </dev/null 2>&1 | grep -- -msplit-addresses
 ./cc1 -version </dev/null 2>&1 | grep -- -mgpopt
 
diff --git a/gcc-2.8.1-psx.Dockerfile b/gcc-2.8.1-psx.Dockerfile
index 3da13ee..36cd135 100644
--- a/gcc-2.8.1-psx.Dockerfile
+++ b/gcc-2.8.1-psx.Dockerfile
@@ -37,7 +37,8 @@ RUN make --jobs $(nproc) cpp cc1 xgcc cc1plus g++ CFLAGS="-std=gnu89 -m32 -stati
 COPY tests /work/tests
 RUN ./cc1 -quiet -O2 /work/tests/little_endian.c && grep -E 'lbu\s\$2,0\(\$4\)' /work/tests/little_endian.s
 RUN ./cc1 -quiet -O2 /work/tests/section_attribute.c
-RUN ./cc1 -version </dev/null 2>&1 | grep -- -msoft-float
+RUN ./cc1 -quiet -O2 /work/tests/host_wide_int.c && grep -E '# 0x80000000$' /work/tests/host_wide_int.s
+RUN ./cc1 -version</dev/null 2>&1 | grep -- -msoft-float
 RUN ./cc1 -version </dev/null 2>&1 | grep -- -msplit-addresses
 RUN ./cc1 -version </dev/null 2>&1 | grep -- -mgpopt
 
diff --git a/patches/xm-darwin.h b/patches/xm-darwin.h
index 8197624..1df192a 100644
--- a/patches/xm-darwin.h
+++ b/patches/xm-darwin.h
@@ -22,4 +22,7 @@
 /* macOS provides bcopy/bcmp/bzero via <string.h>.  */
 #define BSTRING
 
+#define HOST_BITS_PER_WIDE_INT 32
+#define HOST_WIDE_INT int
+
 #include "tm.h"
diff --git a/tests/host_wide_int.c b/tests/host_wide_int.c
new file mode 100644
index 0000000..6a20b62
--- /dev/null
+++ b/tests/host_wide_int.c
@@ -0,0 +1,3 @@
+unsigned int signbit_mask(void) {
+    return 1u << 31;
+}