xiaoxiang781216 commented on code in PR #15876:
URL: https://github.com/apache/nuttx/pull/15876#discussion_r1963046943
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arch/arm/src/armv7-m/arm_fpuconfig.c:
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@@ -83,3 +86,30 @@ void arm_fpuconfig(void)
regval |= NVIC_CPACR_CP_FULL(10) | NVIC_CPACR_CP_FULL(11);
putreg32(regval, NVIC_CPACR);
}
+#else
+void arm_fpuconfig(void)
+{
+ uint32_t regval;
+
+ /* Clear CONTROL.FPCA so that we do not get the extended context frame
+ * with the volatile FP registers stacked in the saved context.
+ */
+
+ regval = getcontrol();
+ regval &= ~CONTROL_FPCA;
+ setcontrol(regval);
+
+ /* Enable lazy stacking (LSPEN) and automatic state preservation (ASPEN).
+ */
+
+ regval = getreg32(NVIC_FPCCR);
Review Comment:
can we use one arm_fpuconfig but add #ifdef/#else/#endif into the code
fragment?
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