tests/fpu_sharing: ported to SPARC

Added the bits and pieces required to run the test on SPARC.

Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>

tests/kernel/fpu_sharing/generic/src/float_context.h

@@ -123,6 +123,18 @@ struct fp_non_volatile_register_set {
 #define SIZEOF_FP_VOLATILE_REGISTER_SET sizeof(struct fp_volatile_register_set)
 #define SIZEOF_FP_NON_VOLATILE_REGISTER_SET 0
 
+#elif defined(CONFIG_SPARC)
+
+struct fp_volatile_register_set {
+	double d[16];
+};
+
+struct fp_non_volatile_register_set {
+};
+
+#define SIZEOF_FP_VOLATILE_REGISTER_SET sizeof(struct fp_volatile_register_set)
+#define SIZEOF_FP_NON_VOLATILE_REGISTER_SET 0
+
 #else
 
 #error  "Architecture must provide the following definitions:\n"

tests/kernel/fpu_sharing/generic/src/float_regs_sparc.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2020 Cobham Gaisler AB
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _FLOAT_REGS_SPARC_H
+#define _FLOAT_REGS_SPARC_H
+
+#include <toolchain.h>
+#include "float_context.h"
+
+static inline void _load_all_float_registers(struct fp_register_set *regs)
+{
+	__asm__ volatile (
+		"ldd	[%0 + 0x00], %%f0\n"
+		"ldd	[%0 + 0x08], %%f2\n"
+		"ldd	[%0 + 0x10], %%f4\n"
+		"ldd	[%0 + 0x18], %%f6\n"
+		"ldd	[%0 + 0x20], %%f8\n"
+		"ldd	[%0 + 0x28], %%f10\n"
+		"ldd	[%0 + 0x30], %%f12\n"
+		"ldd	[%0 + 0x38], %%f14\n"
+		"ldd	[%0 + 0x40], %%f16\n"
+		"ldd	[%0 + 0x48], %%f18\n"
+		"ldd	[%0 + 0x50], %%f20\n"
+		"ldd	[%0 + 0x58], %%f22\n"
+		"ldd	[%0 + 0x60], %%f24\n"
+		"ldd	[%0 + 0x68], %%f26\n"
+		"ldd	[%0 + 0x70], %%f28\n"
+		"ldd	[%0 + 0x78], %%f30\n"
+		:
+		: "r" (&regs->fp_volatile)
+		);
+}
+
+static inline void _store_all_float_registers(struct fp_register_set *regs)
+{
+	__asm__ volatile (
+		"std	%%f0,  [%0 + 0x00]\n"
+		"std	%%f2,  [%0 + 0x08]\n"
+		"std	%%f4,  [%0 + 0x10]\n"
+		"std	%%f6,  [%0 + 0x18]\n"
+		"std	%%f8,  [%0 + 0x20]\n"
+		"std	%%f10, [%0 + 0x28]\n"
+		"std	%%f12, [%0 + 0x30]\n"
+		"std	%%f14, [%0 + 0x38]\n"
+		"std	%%f16, [%0 + 0x40]\n"
+		"std	%%f18, [%0 + 0x48]\n"
+		"std	%%f20, [%0 + 0x50]\n"
+		"std	%%f22, [%0 + 0x58]\n"
+		"std	%%f24, [%0 + 0x60]\n"
+		"std	%%f26, [%0 + 0x68]\n"
+		"std	%%f28, [%0 + 0x70]\n"
+		"std	%%f30, [%0 + 0x78]\n"
+		:
+		: "r" (&regs->fp_volatile)
+		: "memory"
+		);
+}
+
+static inline void _load_then_store_all_float_registers(struct fp_register_set
+							*regs)
+{
+	_load_all_float_registers(regs);
+	_store_all_float_registers(regs);
+}
+#endif /* _FLOAT_REGS_SPARC_H */

tests/kernel/fpu_sharing/generic/src/load_store.c

@@ -62,6 +62,8 @@
 #else
 #include "float_regs_riscv_other.h"
 #endif /* __GNUC__ */
+#elif defined(CONFIG_SPARC)
+#include "float_regs_sparc.h"
 #endif
 
 #include "float_context.h"

tests/kernel/fpu_sharing/generic/src/test_common.h

@@ -9,7 +9,7 @@
 /*
  * Test Thread Parameters
  */
-#define THREAD_STACK_SIZE	1024
+#define THREAD_STACK_SIZE	(1024 + CONFIG_TEST_EXTRA_STACKSIZE)
 
 #define THREAD_HIGH_PRIORITY	5
 #define THREAD_LOW_PRIORITY	10

tests/kernel/fpu_sharing/generic/testcase.yaml

@@ -30,6 +30,12 @@ tests:
     tags: kernel
     timeout: 600
     min_ram: 16
+  kernel.fpu_sharing.generic.sparc:
+    extra_args: PI_NUM_ITERATIONS=70000
+    filter: CONFIG_CPU_HAS_FPU
+    arch_allow: sparc
+    tags: kernel
+    timeout: 600
   kernel.fpu_sharing.generic.x86:
     extra_args: CONF_FILE=prj_x86.conf
     platform_allow: qemu_x86