Hello, this series adds limited support for FLIX instructions. FLIX (flexible length instruction extensions) allows bundling multiple opcodes in a single instruction. Each opcode is executed as if it was the only opcode in the instruction. Opcodes may not simultaneously modify same resource (register or state). Multiple branches, even non-taken, are also not allowed in one instruction.
Instructions with opcodes that have circular dependencies between used resources other than registers (e.g. opcode A uses resource U and modifies resource M, while opcode B uses resource M and modifies resource U) are not supported in this series. Max Filippov (13): target/xtensa: move xtensa_finalize_config to xtensa_core_class_init target/xtensa: don't require opcode table sorting target/xtensa: allow multiple names for single opcode target/xtensa: implement wide branches and loops target/xtensa: sort FLIX instruction opcodes target/xtensa: add generic instruction post-processing target/xtensa: move WINDOW_BASE SR update to postprocessing target/xtensa: only rotate window in the retw helper target/xtensa: reorganize register handling in translators target/xtensa: reorganize access to MAC16 registers target/xtensa: reorganize access to boolean registers target/xtensa: break circular register dependencies target/xtensa: prioritize load/store in FLIX bundles target/xtensa/cpu.h | 37 +- target/xtensa/helper.c | 93 ++- target/xtensa/helper.h | 5 +- target/xtensa/overlay_tool.h | 1 - target/xtensa/translate.c | 1595 +++++++++++++++++++++++++++--------------- target/xtensa/win_helper.c | 22 +- 6 files changed, 1162 insertions(+), 591 deletions(-) -- 2.11.0
