From: Yunsup Lee <yunsup@cs.berkeley.edu>
Date: Wed, 16 Oct 2013 22:10:12 +0000 (-0700)
Subject: fix maxvl calc logic
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1276dd07f712ff31068e0a09a52df74b36a70f81;p=riscv-isa-sim.git

fix maxvl calc logic
---

diff --git a/hwacha/insns/vsetcfg.h b/hwacha/insns/vsetcfg.h
index 8ca408c..a5fd959 100644
--- a/hwacha/insns/vsetcfg.h
+++ b/hwacha/insns/vsetcfg.h
@@ -4,6 +4,10 @@ uint32_t nfpr = ((XS1 >> 6) & 0x3f) + ((insn.i_imm() >> 6) & 0x3f);
 // raise trap when nxpr/nfpr is larger than possible
 WRITE_NXPR(nxpr);
 WRITE_NFPR(nfpr);
-uint32_t maxvl = 8 * (256 / (nxpr-1 + nfpr));
+uint32_t maxvl;
+if (nxpr + nfpr < 2)
+  maxvl = 8 * 256;
+else
+  maxvl = 8 * (256 / (nxpr-1 + nfpr));
 WRITE_MAXVL(maxvl);
 WRITE_VL(0);