From 3ebbeba6d5daa236ff346f313e79a9359d1a37bd Mon Sep 17 00:00:00 2001 From: Andrew Waterman Date: Thu, 11 Nov 2010 15:49:21 -0800 Subject: [sim] handle integer division overflow Behavior is now same as GCC's optimizer. Previously, we just crashed :) --- riscv/insns/div.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'riscv/insns/div.h') diff --git a/riscv/insns/div.h b/riscv/insns/div.h index 9b752aa..f6a9b6b 100644 --- a/riscv/insns/div.h +++ b/riscv/insns/div.h @@ -1,2 +1,5 @@ require64; -RD = sreg_t(RS1) / sreg_t(RS2); +if(RS2 == 0 || sreg_t(RS1) == INT64_MIN && sreg_t(RS2) == -1) + RD = sreg_t(RS1) < 0 ? INT64_MIN : INT64_MAX; +else + RD = sreg_t(RS1) / sreg_t(RS2); -- cgit v1.1