From 45eb4d476d8a060b843597192379433bbfa8ab3b Mon Sep 17 00:00:00 2001 From: DJ Delorie Date: Tue, 14 Dec 2010 23:39:03 +0000 Subject: [PATCH] (decode_opcode): RXO_branchrel is relative to the opcode's PC, not the address following the opcode. --- sim/rx/ChangeLog | 2 ++ sim/rx/rx.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/sim/rx/ChangeLog b/sim/rx/ChangeLog index c0b4b5d..1f9866a 100644 --- a/sim/rx/ChangeLog +++ b/sim/rx/ChangeLog @@ -2,6 +2,8 @@ * rx.c (decode_opcode): For "MVFC PC,", use the address of the opcode, not the address following the opcode. + (decode_opcode): RXO_branchrel is relative to the opcode's PC, not + the address following the opcode. 2010-11-11 DJ Delorie diff --git a/sim/rx/rx.c b/sim/rx/rx.c index 5fb11d9..dd9bb8e 100644 --- a/sim/rx/rx.c +++ b/sim/rx/rx.c @@ -1087,10 +1087,10 @@ decode_opcode () break; case RXO_branchrel: - if (GS()) + if (opcode->op[1].type == RX_Operand_None || GS()) { int delta = GD(); - regs.r_pc += delta; + regs.r_pc = opcode_pc + delta; #ifdef CYCLE_ACCURATE /* Note: specs say 3, chip says 2. */ if (delta >= 0 && delta < 16 -- 2.7.4