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m68k: fix subx mem, mem instruction 

This patch fixes decrement of the pointers for subx mem, mem instructions.
Without the patch pointers are decremented by OS_* constant value instead of
retrieving the corresponding data size and using it as a decrement.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180418064152.24606.71975.stgit@pasha-VirtualBox>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Pavel Dovgalyuk 2018-04-18 09:41:53 +03:00 committed by Laurent Vivier
parent c2c768500f
commit 355d4d1c00
1 changed files with 2 additions and 2 deletions
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4
target/m68k/translate.c
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@ -3166,11 +3166,11 @@ DISAS_INSN(subx_mem)
opsize = insn_opsize(insn); opsize = insn_opsize(insn);
addr_src = AREG(insn, 0); addr_src = AREG(insn, 0);
tcg_gen_subi_i32(addr_src, addr_src, opsize); tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
src = gen_load(s, opsize, addr_src, 1, IS_USER(s)); src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
addr_dest = AREG(insn, 9); addr_dest = AREG(insn, 9);
tcg_gen_subi_i32(addr_dest, addr_dest, opsize); tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s)); dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
gen_subx(s, src, dest, opsize); gen_subx(s, src, dest, opsize);