Hexagon (tests/tcg/hexagon) update overflow test

Add a test that sets USR multiple times in a packet

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20220210021556.9217-9-tsimpson@quicinc.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>

tests/tcg/hexagon/overflow.c

@@ -1,5 +1,5 @@
 /*
- *  Copyright(c) 2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
+ *  Copyright(c) 2021-2022 Qualcomm Innovation Center, Inc. All Rights Reserved.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -72,6 +72,20 @@ int read_usr_overflow(void)
     return result & 1;
 }
 
+int get_usr_overflow(int usr)
+{
+    return usr & 1;
+}
+
+int get_usr_fp_invalid(int usr)
+{
+    return (usr >> 1) & 1;
+}
+
+int get_usr_lpcfg(int usr)
+{
+    return (usr >> 8) & 0x3;
+}
 
 jmp_buf jmp_env;
 int usr_overflow;
@@ -82,6 +96,49 @@ static void sig_segv(int sig, siginfo_t *info, void *puc)
     longjmp(jmp_env, 1);
 }
 
+static void test_packet(void)
+{
+    int convres;
+    int satres;
+    int usr;
+
+    asm("r2 = usr\n\t"
+        "r2 = clrbit(r2, #0)\n\t"        /* clear overflow bit */
+        "r2 = clrbit(r2, #1)\n\t"        /* clear FP invalid bit */
+        "usr = r2\n\t"
+        "{\n\t"
+        "    %0 = convert_sf2uw(%3):chop\n\t"
+        "    %1 = satb(%4)\n\t"
+        "}\n\t"
+        "%2 = usr\n\t"
+        : "=r"(convres), "=r"(satres), "=r"(usr)
+        : "r"(0x6a051b86), "r"(0x0410eec0)
+        : "r2", "usr");
+
+    check(convres, 0xffffffff);
+    check(satres, 0x7f);
+    check(get_usr_overflow(usr), 1);
+    check(get_usr_fp_invalid(usr), 1);
+
+    asm("r2 = usr\n\t"
+        "r2 = clrbit(r2, #0)\n\t"        /* clear overflow bit */
+        "usr = r2\n\t"
+        "%2 = r2\n\t"
+        "p3 = sp3loop0(1f, #1)\n\t"
+        "1:\n\t"
+        "{\n\t"
+        "    %0 = satb(%2)\n\t"
+        "}:endloop0\n\t"
+        "%1 = usr\n\t"
+        : "=r"(satres), "=r"(usr)
+        : "r"(0x0410eec0)
+        : "r2", "usr", "p3", "sa0", "lc0");
+
+    check(satres, 0x7f);
+    check(get_usr_overflow(usr), 1);
+    check(get_usr_lpcfg(usr), 2);
+}
+
 int main()
 {
     struct sigaction act;
@@ -102,6 +159,8 @@ int main()
 
     check(usr_overflow, 0);
 
+    test_packet();
+
     puts(err ? "FAIL" : "PASS");
     return err ? EXIT_FAILURE : EXIT_SUCCESS;
 }