[PATCH -next v2 4/4] kselftest/arm64: add jscvt feature to hwcap test

[Zeng Heng]

Add the jscvt feature check in the set of hwcap tests.

Due to the requirement of jscvt feature, a compiler configuration
of v8.3 or above is needed to support assembly. Therefore, hand
encode is used here instead.

Signed-off-by: Zeng Heng <zengheng4 at huawei.com>
Reviewed-by: Mark Brown <broonie at kernel.org>
---
 tools/testing/selftests/arm64/abi/hwcap.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
index df7a62659aa2..2683d0deb4c3 100644
--- a/tools/testing/selftests/arm64/abi/hwcap.c
+++ b/tools/testing/selftests/arm64/abi/hwcap.c
@@ -68,6 +68,12 @@ static void ilrcpc_sigill(void)
 	asm volatile(".inst 0x994083e0" : : : );
 }

+static void jscvt_sigill(void)
+{
+	/* FJCVTZS W0, D0 */
+	asm volatile(".inst 0x1e7e0000" : : : );
+}
+
 static void lrcpc_sigill(void)
 {
 	/* LDAPR W0, [SP, #0] */
@@ -320,6 +326,13 @@ static const struct hwcap_data {
 		.cpuinfo = "fp",
 		.sigill_fn = fp_sigill,
 	},
+	{
+		.name = "JSCVT",
+		.at_hwcap = AT_HWCAP,
+		.hwcap_bit = HWCAP_JSCVT,
+		.cpuinfo = "jscvt",
+		.sigill_fn = jscvt_sigill,
+	},
 	{
 		.name = "LRCPC",
 		.at_hwcap = AT_HWCAP,
--
2.25.1