Initial commit

venv/Lib/site-packages/greenlet/platform/switch_arm32_ios.h

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+/*
+ * this is the internal transfer function.
+ *
+ * HISTORY
+ * 31-May-15 iOS support. Ported from arm32. Proton <feisuzhu@163.com>
+ *
+ * NOTES
+ *
+ *   It is not possible to detect if fp is used or not, so the supplied
+ *   switch function needs to support it, so that you can remove it if
+ *   it does not apply to you.
+ *
+ * POSSIBLE ERRORS
+ *
+ *   "fp cannot be used in asm here"
+ *
+ *   - Try commenting out "fp" in REGS_TO_SAVE.
+ *
+ */
+
+#define STACK_REFPLUS 1
+
+#ifdef SLP_EVAL
+
+#define STACK_MAGIC 0
+#define REG_SP "sp"
+#define REG_SPSP "sp,sp"
+#define REG_FP "r7"
+#define REG_FPFP "r7,r7"
+#define REGS_TO_SAVE_GENERAL "r4", "r5", "r6", "r8", "r10", "r11", "lr"
+#define REGS_TO_SAVE REGS_TO_SAVE_GENERAL, "d8", "d9", "d10", "d11", \
+                                           "d12", "d13", "d14", "d15"
+
+static int
+#ifdef __GNUC__
+__attribute__((optimize("no-omit-frame-pointer")))
+#endif
+slp_switch(void)
+{
+        void *fp;
+        int *stackref, stsizediff, result;
+        __asm__ volatile ("" : : : REGS_TO_SAVE);
+        __asm__ volatile ("str " REG_FP ",%0" : "=m" (fp));
+        __asm__ ("mov %0," REG_SP : "=r" (stackref));
+        {
+                SLP_SAVE_STATE(stackref, stsizediff);
+                __asm__ volatile (
+                    "add " REG_SPSP ",%0\n"
+                    "add " REG_FPFP ",%0\n"
+                    :
+                    : "r" (stsizediff)
+                    : REGS_TO_SAVE /* Clobber registers, force compiler to
+                                    * recalculate address of void *fp from REG_SP or REG_FP */
+                );
+                SLP_RESTORE_STATE();
+        }
+        __asm__ volatile (
+            "ldr " REG_FP ", %1\n\t"
+            "mov %0, #0"
+            : "=r" (result)
+            : "m" (fp)
+            : REGS_TO_SAVE /* Force compiler to restore saved registers after this */
+        );
+        return result;
+}
+
+#endif