tests/fpu: Add tests for ftdiv and ftsqrt

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

tests/fpu/fpu.c

@@ -1665,6 +1665,65 @@ int fpu_test_25(void)
 	return 0;
 }
 
+struct ftvals {
+	unsigned long val_a;
+	unsigned long val_b;
+	int cr_ftdiv;
+	int cr_ftsqrt;
+} ftvals[] = {
+	{ 0x3ff0000000000000, 0x3ff0000000000000, 0, 0 },
+	{ 0x0000000000000000, 0x3ff0000000000000, 0, 6 },
+	{ 0xfff0000000000000, 0x3ff0000000000000, 6, 6 },
+	{ 0x7ff1234560000000, 0x3ff0000000000000, 2, 2 },
+	{ 0x3ff0000000000000, 0xfff0000000000000, 6, 0 },
+	{ 0x3ff0000000000000, 0x8000000000000000, 6, 0 },
+	{ 0x3ff0000000000000, 0x7ff9234560000000, 2, 0 },
+	{ 0x3ff0000000000000, 0x0020000000000000, 0, 0 },
+	{ 0x3ff0000000000000, 0x0010000000000000, 2, 0 },
+	{ 0x3ff0000000000000, 0x0001000000000000, 6, 0 },
+	{ 0x3ff0000000000000, 0x7fb1234500000000, 0, 0 },
+	{ 0x3ff0000000000000, 0x7fc1234500000000, 2, 0 },
+	{ 0x3ff0000000000000, 0x7fd1234500000000, 2, 0 },
+	{ 0x3ff0000000000000, 0x7fe1234500000000, 2, 0 },
+	{ 0x6000000000000000, 0x2000000000000000, 2, 0 },
+	{ 0x5ff0000000000000, 0x2000000000000000, 2, 0 },
+	{ 0x5fe0000000000000, 0x2000000000000000, 0, 0 },
+	{ 0x2000000000000000, 0x5fc0000000000000, 0, 0 },
+	{ 0x2000000000000000, 0x5fd0000000000000, 2, 0 },
+	{ 0x0360000000000000, 0x4320000000000000, 0, 0 },
+	{ 0x0350000000000000, 0x4310000000000000, 2, 2 },
+	{ 0x0010000000000000, 0x3fd0000000000000, 2, 2 },
+	{ 0x0001000000000000, 0x3fd0000000000000, 2, 6 },
+	{ 0xbff0000000000000, 0x3ff0000000000000, 0, 2 },
+	{ 0x3fd0000000000000, 0x0001000000000000, 6, 0 },
+};
+
+int test26(long arg)
+{
+	long i;
+	int cr;
+	struct ftvals *vp = ftvals;
+
+	set_fpscr(FPS_RN_NEAR);
+	for (i = 0; i < sizeof(ftvals) / sizeof(ftvals[0]); ++i, ++vp) {
+		asm("lfd 5,0(%1); lfd 6,8(%1); ftdiv 5,5,6; ftsqrt 4,5; mfcr %0" :
+		    "=r" (cr) : "b" (&vp->val_a) : "cr4", "cr5");
+		if (((cr >> 8) & 0xf) != vp->cr_ftdiv ||
+		    ((cr >> 12) & 0x1f) != vp->cr_ftsqrt) {
+			print_hex(i, 2, " ");
+			print_hex(cr, 8, " ");
+			return i + 1;
+		}
+	}
+	return 0;
+}
+
+int fpu_test_26(void)
+{
+	enable_fp();
+	return trapit(0, test26);
+}
+
 int fail = 0;
 
 void do_test(int num, int (*test)(void))
@@ -1715,6 +1774,7 @@ int main(void)
 	do_test(23, fpu_test_23);
 	do_test(24, fpu_test_24);
 	do_test(25, fpu_test_25);
+	do_test(26, fpu_test_26);
 
 	return fail;
 }

tests/test_fpu.console_out

@@ -23,3 +23,4 @@ test 22:PASS
 test 23:PASS
 test 24:PASS
 test 25:PASS
+test 26:PASS