From: Paul Mackerras <paulus@ozlabs.org>
Date: Wed, 26 May 2021 07:44:19 +0000 (+1000)
Subject: tests/fpu: Test FPU unavailable interrupt following a load
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f40842d9b2abcc604316b966f3bb7d9f8c456c2e;p=microwatt.git

tests/fpu: Test FPU unavailable interrupt following a load

This adds a load before a floating-point load which should generate a
floating-point unavailable interrupt, to test for the bug where
unavailability interrupts can get dropped while loadstore1 is
executing instructions.

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

diff --git a/tests/fpu/fpu.c b/tests/fpu/fpu.c
index 52f21d0..500e92d 100644
--- a/tests/fpu/fpu.c
+++ b/tests/fpu/fpu.c
@@ -106,9 +106,11 @@ int fooiw;
 
 int do_fp_op(long arg)
 {
+	unsigned long tmp;
+
 	switch (arg) {
 	case 0:
-		asm("lfd 31,0(%0)" : : "b" (&foo));
+		asm("ld %0,0(%1); lfd 31,0(%1)" : "=&r" (tmp) : "b" (&foo));
 		break;
 	case 1:
 		asm("stfd 31,0(%0)" : : "b" (&foow) : "memory");
diff --git a/tests/test_fpu.bin b/tests/test_fpu.bin
index 50831cb..dee8fbd 100755
Binary files a/tests/test_fpu.bin and b/tests/test_fpu.bin differ