4 files changed, 43 insertions, 6 deletions
diff --git a/support/regression/tests/bitintfromfloat.c.in b/support/regression/tests/bitintfromfloat.c.in
new file mode 100644
index 000000000..bf7ef9530
--- /dev/null
+++ b/support/regression/tests/bitintfromfloat.c.in
@@ -0,0 +1,35 @@
+/** casts between bit-precise integers and float
+
+    width: 2, 4, 6, 7, 8, 9, 15, 16, 17, 24, 32, 33, 40, 48, 63, 64, 65
+    sign: unsigned, signed
+*/
+
+#include <testfwk.h>
+
+#include <float.h>
+
+// clang 11 supports bit-precise types, but deviates a bit from C23.
+#if __clang_major__ == 11
+#define __SDCC_BITINT_MAXWIDTH 128
+#define _BitInt _ExtInt
+#endif
+
+#if __SDCC_BITINT_MAXWIDTH >= {width} && (32 >= {width} || !defined(__SDCC_pdk14)) // Lack of memory on pdk14 for wider types. Maybe some future optimization will help here.
+typedef {sign} _BitInt({width}) bitinttype;
+
+bitinttype from_float(float f)
+{
+	return(f);
+}
+#endif
+
+void testCast (void)
+{
+#if __SDCC_BITINT_MAXWIDTH >= {width} && (32 >= {width} || !defined(__SDCC_pdk14)) // Lack of memory on pdk14 for wider types. Maybe some future optimization will help here.
+	float f;
+
+	f = 1;
+	ASSERT (from_float (f) == (bitinttype)f);
+#endif
+}
+
diff --git a/support/regression/tests/bitintfloat.c.in b/support/regression/tests/bitinttofloat.c.in
index 77d5ae986..1645c5b3f 100644
--- a/support/regression/tests/bitintfloat.c.in
+++ b/support/regression/tests/bitinttofloat.c.in
@@ -22,11 +22,6 @@ float to_float(bitinttype b)
 {
 	return(b);
 }
-
-/*bitinttype from_float(float f)
-{
-	return(f);
-}*/
 #endif
 
 void testCast (void)
diff --git a/support/regression/tests/coremark.c.in b/support/regression/tests/coremark.c.in
index 35eaa4125..4944f9ad5 100644
--- a/support/regression/tests/coremark.c.in
+++ b/support/regression/tests/coremark.c.in
@@ -21,7 +21,7 @@
 #define LACK_OF_MEMORY
 #endif
 
-#if !defined(LACK_OF_MEMORY) && !defined(__SDCC_z80) && !defined(__SDCC_z180) && !defined(__SDCC_ds390) /* z80, z180, ds390: fails, possibly a bug in codegen */
+#if !defined(LACK_OF_MEMORY) && !defined(__SDCC_ds390) /* ds390: fails, possibly a bug in codegen */
 
 // coremark.h content below.
 
diff --git a/support/regression/tests/muldiv.c.in b/support/regression/tests/muldiv.c.in
index 1df52656f..bd7dd71c9 100644
--- a/support/regression/tests/muldiv.c.in
+++ b/support/regression/tests/muldiv.c.in
@@ -109,6 +109,12 @@ test16to32(void)
    {attr} {storage} int i, j;
    {attr} {storage} unsigned int ui, uj;
 
+   i = 123;
+   j = 0xaa;
+   ASSERT((long)i * (long)j == 123l * (long)0xaa);
+   i = -i;
+   ASSERT((long)i * (long)j == -123l * (long)0xaa);
+
    i = 42;
    j = 42;
    ASSERT((long)i * (long)j == 42l * 42l);
@@ -164,3 +170,4 @@ testMod(void)
     ASSERT(i%4 == -1);
 #endif
 }
+