From e819f852c5eafb457401396d9c3de85cd5870549 Mon Sep 17 00:00:00 2001 From: Andrew Waterman Date: Wed, 15 Feb 2012 19:44:24 -0800 Subject: reimplement div[u][w]/rem[u][w] fixes bugs for inputs not properly sign-extended --- riscv/insns/rem.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'riscv/insns/rem.h') diff --git a/riscv/insns/rem.h b/riscv/insns/rem.h index ac82a56..8094b5b 100644 --- a/riscv/insns/rem.h +++ b/riscv/insns/rem.h @@ -1,6 +1,8 @@ -if(RS2 == 0) - RD = RS1; -else if(sreg_t(RS1) == INT64_MIN && sreg_t(RS2) == -1) +sreg_t lhs = sext_xprlen(RS1); +sreg_t rhs = sext_xprlen(RS2); +if(rhs == 0) + RD = lhs; +else if(lhs == INT64_MIN && rhs == -1) RD = 0; else - RD = sext_xprlen(sext_xprlen(RS1) % sext_xprlen(RS2)); + RD = sext_xprlen(lhs % rhs); -- cgit v1.1