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From 524fd7244cfec4ec6760e52001c9a41d1913066e Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sun, 6 Apr 2025 20:54:08 -0700
Subject: [PATCH] slp_switch: Implement for RISCV32
Changed data types from long to int for fp variable
stackref pointer and stsizediff variable
Changed the load instruction from ld (64-bit load) to lw (32-bit load)
Upstream-Status: Submitted [https://github.com/python-greenlet/greenlet/pull/439]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
src/greenlet/platform/switch_riscv_unix.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/src/greenlet/platform/switch_riscv_unix.h b/src/greenlet/platform/switch_riscv_unix.h
index e74f37a..32ca78c 100644
--- a/src/greenlet/platform/switch_riscv_unix.h
+++ b/src/greenlet/platform/switch_riscv_unix.h
@@ -11,9 +11,14 @@
static int
slp_switch(void)
{
- long fp;
int ret;
+#if __riscv_xlen == 32
+ long fp;
long *stackref, stsizediff;
+#else
+ int fp;
+ int *stackref, stsizediff;
+#endif
__asm__ volatile ("" : : : REGS_TO_SAVE);
__asm__ volatile ("mv %0, fp" : "=r" (fp) : );
__asm__ volatile ("mv %0, sp" : "=r" (stackref) : );
@@ -28,7 +33,11 @@ slp_switch(void)
SLP_RESTORE_STATE();
}
__asm__ volatile ("" : : : REGS_TO_SAVE);
+#if __riscv_xlen == 32
+ __asm__ volatile ("lw fp, %0" : : "m" (fp));
+#else
__asm__ volatile ("ld fp, %0" : : "m" (fp));
+#endif
__asm__ volatile ("mv %0, zero" : "=r" (ret) : );
return ret;
}
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