From 4a52a71956a8d46fcb7294ac71734504bb09bcc2 Mon Sep 17 00:00:00 2001
From: S. Solomon Darnell
Date: Fri, 28 Mar 2025 21:52:21 -0500
Subject: two version of R2R are here

---
 .../greenlet/platform/switch_riscv_unix.h          | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 .venv/lib/python3.12/site-packages/greenlet/platform/switch_riscv_unix.h

(limited to '.venv/lib/python3.12/site-packages/greenlet/platform/switch_riscv_unix.h')

diff --git a/.venv/lib/python3.12/site-packages/greenlet/platform/switch_riscv_unix.h b/.venv/lib/python3.12/site-packages/greenlet/platform/switch_riscv_unix.h
new file mode 100644
index 00000000..e74f37af
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/greenlet/platform/switch_riscv_unix.h
@@ -0,0 +1,36 @@
+#define STACK_REFPLUS 1
+
+#ifdef SLP_EVAL
+#define STACK_MAGIC 0
+
+#define REGS_TO_SAVE "s1", "s2", "s3", "s4", "s5", \
+		     "s6", "s7", "s8", "s9", "s10", "s11", "fs0", "fs1", \
+		     "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", "fs8", "fs9", \
+		     "fs10", "fs11"
+
+static int
+slp_switch(void)
+{
+  long fp;
+  int ret;
+  long *stackref, stsizediff;
+  __asm__ volatile ("" : : : REGS_TO_SAVE);
+  __asm__ volatile ("mv %0, fp" : "=r" (fp) : );
+  __asm__ volatile ("mv %0, sp" : "=r" (stackref) : );
+  {
+      SLP_SAVE_STATE(stackref, stsizediff);
+      __asm__ volatile (
+	  "add sp, sp, %0\n\t"
+	  "add fp, fp, %0\n\t"
+	  : /* no outputs */
+	  : "r" (stsizediff)
+	  );
+      SLP_RESTORE_STATE();
+  }
+  __asm__ volatile ("" : : : REGS_TO_SAVE);
+  __asm__ volatile ("ld fp, %0" : : "m" (fp));
+  __asm__ volatile ("mv %0, zero" : "=r" (ret) : );
+  return ret;
+}
+
+#endif
-- 
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