3 commits

Author	SHA1	Message	Date
Laurent Vivier	68c9ab9b77	target/m68k: fix V flag for CC_OP_SUBx ... V flag for subtraction is: v = (res ^ src1) & (src1 ^ src2) (see COMPUTE_CCR() in target/m68k/helper.c) But gen_flush_flags() uses: v = (res ^ src2) & (src1 ^ src2) The problem has been found with the following program: .global _start _start: move.l #-2147483648,%d0 subq.l #1,%d0 jvc 1f move.l #1,%d1 move.l #1,%d0 trap #0 1: move.l #0,%d1 move.l #1,%d0 trap #0 It works fine (exit(1)) on real hardware, and with "-singlestep". "-singlestep" uses gen_helper_flush_flags(), whereas without "-singlestep", V flag is computed directly in gen_flush_flags(). This patch updates gen_flush_flags() to have the same result as with gen_helper_flush_flags(). Backports commit 043b936ef6fe53396b3c6b8f5562ea3e238a071d from qemu	2018-03-03 14:59:20 -05:00
Laurent Vivier	ce25609ed3	target/m68k: implement rtd ... Add "Return and Deallocate" (rtd) instruction. RTD #d (SP) -> PC SP + 4 + d -> SP Backports commit 18059c9e1648bf4fc5c7c1bae6f54690742b05ba from qemu	2018-03-03 14:27:01 -05:00
Thomas Huth	b2f1326437	Move target-* CPU file into a target/ folder ... We've currently got 18 architectures in QEMU, and thus 18 target-xxx folders in the root folder of the QEMU source tree. More architectures (e.g. RISC-V, AVR) are likely to be included soon, too, so the main folder of the QEMU sources slowly gets quite overcrowded with the target-xxx folders. To disburden the main folder a little bit, let's move the target-xxx folders into a dedicated target/ folder, so that target-xxx/ simply becomes target/xxx/ instead. Backports commit fcf5ef2ab52c621a4617ebbef36bf43b4003f4c0 from qemu	2018-03-01 22:50:58 -05:00