arch: arm: cortex_m: Modifed FPU save and restore helpers

msmttchr · msmttchr · commit 83f210105fd3 · 2025-07-14T23:06:35.000+02:00
z_arm_save_fp_context and z_arm_restore_fp_context
save and restore fpu context regardless of the
CONFIG_FPU_SHARING setting.

Signed-off-by: Michele Sardo &lt;michele.sardo@st.com&gt;
diff --git a/arch/arm/core/cortex_m/fpu.c b/arch/arm/core/cortex_m/fpu.c
@@ -16,7 +16,7 @@
 
 void z_arm_save_fp_context(struct fpu_ctx_full *buffer)
 {
-#if defined(CONFIG_FPU_SHARING)
+#if defined(CONFIG_FPU)
 	__ASSERT_NO_MSG(buffer != NULL);
 
 	uint32_t CONTROL = __get_CONTROL();
@@ -44,7 +44,7 @@ void z_arm_save_fp_context(struct fpu_ctx_full *buffer)
 
 void z_arm_restore_fp_context(const struct fpu_ctx_full *buffer)
 {
-#if defined(CONFIG_FPU_SHARING)
+#if defined(CONFIG_FPU)
 	if (buffer->ctx_saved) {
 		/* Set FPCA first so it is set even if an interrupt happens
 		 * during restoration.

Original file line number	Diff line number	Diff line change
`@@ -16,7 +16,7 @@`
`16`	`16`
`17`	`17`	`void z_arm_save_fp_context(struct fpu_ctx_full *buffer)`
`18`	`18`	`{`
`19`		`-#if defined(CONFIG_FPU_SHARING)`
	`19`	`+#if defined(CONFIG_FPU)`
`20`	`20`	`__ASSERT_NO_MSG(buffer != NULL);`
`21`	`21`
`22`	`22`	`uint32_t CONTROL = __get_CONTROL();`
`@@ -44,7 +44,7 @@ void z_arm_save_fp_context(struct fpu_ctx_full *buffer)`
`44`	`44`
`45`	`45`	`void z_arm_restore_fp_context(const struct fpu_ctx_full *buffer)`
`46`	`46`	`{`
`47`		`-#if defined(CONFIG_FPU_SHARING)`
	`47`	`+#if defined(CONFIG_FPU)`
`48`	`48`	`if (buffer->ctx_saved) {`
`49`	`49`	`/* Set FPCA first so it is set even if an interrupt happens`
`50`	`50`	`* during restoration.`