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| author | Richard Henderson <richard.henderson@linaro.org> | 2024-03-13 13:32:29 -1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2024-04-09 07:45:01 -1000 |
| commit | 07843f75fdaff26950e4ddfd5d03556915fee1a7 (patch) | |
| tree | 318f62446ce5ca732bd5dd31a1a1bc0e8f0ccbf4 | |
| parent | 5888357942da1fd5a50efb6e4a6af8b1a27a5af8 (diff) | |
| download | qemu-07843f75fdaff26950e4ddfd5d03556915fee1a7.zip qemu-07843f75fdaff26950e4ddfd5d03556915fee1a7.tar.gz qemu-07843f75fdaff26950e4ddfd5d03556915fee1a7.tar.bz2 | |
tcg: Add TCGContext.emit_before_op
Allow operations to be emitted via normal expanders
into the middle of the opcode stream.
Tested-by: Jørgen Hansen <Jorgen.Hansen@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | include/tcg/tcg.h | 6 | ||||
| -rw-r--r-- | tcg/tcg.c | 14 |
2 files changed, 18 insertions, 2 deletions
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h index 451f3fe..05a1912 100644 --- a/include/tcg/tcg.h +++ b/include/tcg/tcg.h @@ -553,6 +553,12 @@ struct TCGContext { QTAILQ_HEAD(, TCGOp) ops, free_ops; QSIMPLEQ_HEAD(, TCGLabel) labels; + /* + * When clear, new ops are added to the tail of @ops. + * When set, new ops are added in front of @emit_before_op. + */ + TCGOp *emit_before_op; + /* Tells which temporary holds a given register. It does not take into account fixed registers */ TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS]; @@ -1521,6 +1521,7 @@ void tcg_func_start(TCGContext *s) QTAILQ_INIT(&s->ops); QTAILQ_INIT(&s->free_ops); + s->emit_before_op = NULL; QSIMPLEQ_INIT(&s->labels); tcg_debug_assert(s->addr_type == TCG_TYPE_I32 || @@ -2332,7 +2333,11 @@ static void tcg_gen_callN(TCGHelperInfo *info, TCGTemp *ret, TCGTemp **args) op->args[pi++] = (uintptr_t)info; tcg_debug_assert(pi == total_args); - QTAILQ_INSERT_TAIL(&tcg_ctx->ops, op, link); + if (tcg_ctx->emit_before_op) { + QTAILQ_INSERT_BEFORE(tcg_ctx->emit_before_op, op, link); + } else { + QTAILQ_INSERT_TAIL(&tcg_ctx->ops, op, link); + } tcg_debug_assert(n_extend < ARRAY_SIZE(extend_free)); for (i = 0; i < n_extend; ++i) { @@ -3215,7 +3220,12 @@ static TCGOp *tcg_op_alloc(TCGOpcode opc, unsigned nargs) TCGOp *tcg_emit_op(TCGOpcode opc, unsigned nargs) { TCGOp *op = tcg_op_alloc(opc, nargs); - QTAILQ_INSERT_TAIL(&tcg_ctx->ops, op, link); + + if (tcg_ctx->emit_before_op) { + QTAILQ_INSERT_BEFORE(tcg_ctx->emit_before_op, op, link); + } else { + QTAILQ_INSERT_TAIL(&tcg_ctx->ops, op, link); + } return op; } |