Add tests for clearing BSS, copying C structs.

The new tests are bss_e.c, structcopy_e.c.  We do clear the BSS before
calling _m_a_i_n, so fix the comments in the other tests.

tests/plat/_dummy_e.c

@@ -1,6 +1,6 @@
 #include "test.h"
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT(0 == 0);

tests/plat/bss_e.c

@@ -0,0 +1,27 @@
+#include "test.h"
+
+/*
+ * EM puts these variables in BSS.  Their initial values must be zero.
+ * Some platforms, like Linux, clear the BSS before they run the
+ * program.  For other platforms, like pc86, we clear the BSS in
+ * boot.s before we call _m_a_i_n.
+ */
+char c;
+int array[9000];
+short s;
+
+/* Bypasses the CRT, so there's no stdio. */
+void _m_a_i_n(void)
+{
+	int bad, i;
+
+	ASSERT(c == 0);
+	bad = 0;
+	for (i = 0; i < sizeof(array) / sizeof(array[0]); i++) {
+		if(array[i])
+			bad++;
+	}
+	ASSERT(bad == 0);
+	ASSERT(s == 0);
+	finished();
+}

tests/plat/bugs/bug-62-notvar_var_e.c

@@ -40,7 +40,7 @@ void c(int i, int tru, int fal) {
   ASSERT((i != i) == fal);
 }
 
-/* Bypasses the CRT. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void) {
   a();
   b();

tests/plat/build.lua

@@ -9,22 +9,14 @@ definerule("plat_testsuite",
 		-- Remember this is executed from the caller's directory; local
 		-- target names will resolve there.
 		local testfiles = filenamesof(
+			-- added structcopy_e.c
 			"tests/plat/*.c",
-			"tests/plat/dup_e.e",
+			"tests/plat/*.e",
-			"tests/plat/exg_e.e",
-			"tests/plat/inn_e.e",
-			"tests/plat/rck_e.e",
-			"tests/plat/rotate_e.e",
 			"tests/plat/*.p",
 			"tests/plat/b/*.b",
-			"tests/plat/bugs/bug-22-inn_mod.mod",
+			"tests/plat/bugs/*.c",
-			"tests/plat/bugs/bug-62-notvar_var_e.c",
+			"tests/plat/bugs/*.mod",
-			"tests/plat/m2/ConvTest_mod.mod",
+			"tests/plat/m2/*.mod"
-			"tests/plat/m2/NestProc_mod.mod",
-			"tests/plat/m2/OpenArray_mod.mod",
-			"tests/plat/m2/SemaTest_mod.mod",
-			"tests/plat/m2/Set100_mod.mod",
-			"tests/plat/m2/StringTest_mod.mod"
 		)
 
 		acklibrary {

tests/plat/csa_e.c

@@ -11,7 +11,7 @@ int csa(int i)
     }
 }
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT(csa(0) == 0);

tests/plat/csb_e.c

@@ -11,7 +11,7 @@ int csa(int i)
     }
 }
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT(csa(0) == 0);

tests/plat/doublecmp_e.c

@@ -4,7 +4,7 @@
 double one = 1.0;
 double zero = 0.0;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT(zero == zero);

tests/plat/from_d_to_si_e.c

@@ -8,7 +8,7 @@ double minusone = -1.0;
 double big = (double)INT_MAX;
 double minusbig = (double)INT_MIN;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((int)zero == 0);

tests/plat/from_d_to_ui_e.c

@@ -6,7 +6,7 @@ double one = 1.0;
 double zero = 0.0;
 double big = (double)UINT_MAX;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((unsigned int)zero == 0);

tests/plat/from_si_to_d_e.c

@@ -8,7 +8,7 @@ int minusone = -1;
 int big = INT_MAX;
 int minusbig = INT_MIN;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((double)zero == 0.0);

tests/plat/from_ui_to_d_e.c

@@ -6,7 +6,7 @@ unsigned int one_u = 1;
 unsigned int zero_u = 0;
 unsigned int big_u = UINT_MAX;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((double)zero_u == 0.0);

tests/plat/intadd_e.c

@@ -6,7 +6,7 @@ int one = 1;
 int zero = 0;
 int minusone = -1;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((two + one)      == 3);

tests/plat/intcmp_e.c

@@ -4,7 +4,7 @@
 int one = 1;
 int zero = 0;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT(zero == zero);

tests/plat/intdiv_e.c

@@ -6,7 +6,7 @@ int two = 2;
 int one = 1;
 int zero = 0;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((three / two) == 1);

tests/plat/intrem_e.c

@@ -6,7 +6,7 @@ int two = 2;
 int one = 1;
 int zero = 0;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((three % two) == 1);

tests/plat/intshift_e.c

@@ -6,7 +6,7 @@ int one = 1;
 int zero = 0;
 int minusone = -1;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((one     <<zero) == 1);

tests/plat/intsub_e.c

@@ -7,7 +7,7 @@ int one = 1;
 int zero = 0;
 int minusone = -1;
 
-/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+/* Bypasses the CRT, so there's no stdio. */
 void _m_a_i_n(void)
 {
     ASSERT((two - one) == 1);

tests/plat/structcopy_e.c

@@ -0,0 +1,113 @@
+#include "test.h"
+
+/* ACK's C compiler uses EM's loi, sti, blm, or an inline loop to copy
+ * these structs.  The compiler doesn't call memcpy() or other
+ * functions in libc, so this test passes without linking the CRT.
+ */
+
+struct c5 {       /* not a whole number of words */
+	char one[5];
+};
+
+struct ii {       /* two words */
+	int one;
+	int two;
+};
+
+struct iii {      /* three words */
+	int one;
+	int two;
+	int three;
+};
+
+int equal5(char *a, char *b) {  /* a, b must have 5 characters */
+	int i;
+
+	for (i = 0; i < 5; i++)
+		if (a[i] != b[i]) return 0;
+	return 1;
+}
+
+struct c5 make_c5(char *str) {  /* str must have 5 characters */
+	struct c5 out;
+	int i;
+
+	for (i = 0; i < 5; i++)
+		out.one[i] = str[i];
+	return out;
+}
+
+struct ii make_ii(int i, int j) {
+	struct ii out;
+
+	out.one = i;
+	out.two = j;
+	return out;
+}
+
+struct iii make_iii(struct ii in, int k) {
+	struct iii out;
+
+	out.one = in.one;
+	out.two = in.two;
+	out.three = k;
+	return out;
+}
+
+struct c5 rotate_left_c5(struct c5 in) {
+	int i;
+	char c = in.one[0];
+
+	/* Modifies our copy of _in_, not caller's copy. */
+	for (i = 0; i < 4; i++)
+		in.one[i] = in.one[i + 1];
+	in.one[4] = c;
+	return in;
+}
+
+struct iii rotate_left_iii(struct iii in) {
+	int i = in.one;
+
+	/* Modifies our copy of _in_, not caller's copy. */
+	in.one = in.two;
+	in.two = in.three;
+	in.three = i;
+	return in;
+}
+
+/* Bypasses the CRT, so there's no stdio. */
+void _m_a_i_n(void) {
+	struct c5 earth, heart, dup_heart, rol_heart;
+	struct ii pair, dup_pair;
+	struct iii triple, dup_triple, rol_triple;
+
+	earth = make_c5("earth");
+	heart = make_c5("heart");
+	dup_heart = heart;
+	rol_heart = rotate_left_c5(heart);
+	ASSERT(equal5(earth.one, "earth"));
+	ASSERT(equal5(heart.one, "heart"));
+	ASSERT(equal5(dup_heart.one, "heart"));
+	ASSERT(equal5(rol_heart.one, "earth"));
+
+	pair = make_ii(29, 31);
+	dup_pair = pair;
+	triple = make_iii(pair, -9);
+	dup_triple = triple;
+	rol_triple = rotate_left_iii(triple);
+	ASSERT(pair.one == 29);
+	ASSERT(pair.two == 31);
+	ASSERT(dup_pair.one == 29);
+	ASSERT(dup_pair.two == 31);
+	ASSERT(triple.one == 29);
+	ASSERT(triple.two == 31);
+	ASSERT(triple.three == -9);
+	ASSERT(dup_triple.one == 29);
+	ASSERT(dup_triple.two == 31);
+	ASSERT(dup_triple.three == -9);
+	ASSERT(rol_triple.one == 31);
+	ASSERT(rol_triple.two == -9);
+	ASSERT(rol_triple.three == 29);
+
+	finished();
+}