From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 26 Sep 2018 05:35:32 +0000 (+0100)
Subject: easier to #define USING_NOREGS if the opcode does not use any registers
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=db92a4f5629ffbb5efff3741da340a7909c1ee83;p=riscv-isa-sim.git

easier to #define USING_NOREGS if the opcode does not use any registers
---

diff --git a/id_regs.py b/id_regs.py
index 3f5290d..830ef95 100644
--- a/id_regs.py
+++ b/id_regs.py
@@ -58,6 +58,8 @@ def find_registers(fname):
             if p.startswith('WRITE_'):
                 p = p[6:]
             res.append('#define USING_REG_%s' % p)
+    if not res:
+        return '#define USING_NOREGS'
     return '\n'.join(res)
 
 if __name__ == '__main__':