From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35280) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Urwhb-000771-As for qemu-devel@nongnu.org; Wed, 26 Jun 2013 16:52:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UrwhY-0000mq-So for qemu-devel@nongnu.org; Wed, 26 Jun 2013 16:52:31 -0400 Received: from mail-pb0-x22f.google.com ([2607:f8b0:400e:c01::22f]:48536) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrwhY-0000mc-Mm for qemu-devel@nongnu.org; Wed, 26 Jun 2013 16:52:28 -0400 Received: by mail-pb0-f47.google.com with SMTP id rr13so14613554pbb.6 for ; Wed, 26 Jun 2013 13:52:27 -0700 (PDT) Sender: Richard Henderson From: Richard Henderson Date: Wed, 26 Jun 2013 13:52:06 -0700 Message-Id: <1372279929-28836-7-git-send-email-rth@twiddle.net> In-Reply-To: <1372279929-28836-1-git-send-email-rth@twiddle.net> References: <1372279929-28836-1-git-send-email-rth@twiddle.net> Subject: [Qemu-devel] [PATCH v2 6/9] tcg: Simplify logic using TCG_OPF_NOT_PRESENT List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: blauwirbel@gmail.com, claudio.fontana@huawei.com, aurelien@aurel32.net Expand the definition of "not present" to include "should not be present". This means we can simplify the logic surrounding the generic tcg opcodes for which the host backend ought not be providing definitions. Signed-off-by: Richard Henderson --- tcg/tcg-opc.h | 26 +++++++++++++++----------- tcg/tcg.c | 4 +--- tcg/tcg.h | 3 ++- 3 files changed, 18 insertions(+), 15 deletions(-) diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h index c94e255..a8af5b9 100644 --- a/tcg/tcg-opc.h +++ b/tcg/tcg-opc.h @@ -27,17 +27,21 @@ */ /* predefined ops */ -DEF(end, 0, 0, 0, 0) /* must be kept first */ -DEF(nop, 0, 0, 0, 0) -DEF(nop1, 0, 0, 1, 0) -DEF(nop2, 0, 0, 2, 0) -DEF(nop3, 0, 0, 3, 0) -DEF(nopn, 0, 0, 1, 0) /* variable number of parameters */ +DEF(end, 0, 0, 0, TCG_OPF_NOT_PRESENT) /* must be kept first */ +DEF(nop, 0, 0, 0, TCG_OPF_NOT_PRESENT) +DEF(nop1, 0, 0, 1, TCG_OPF_NOT_PRESENT) +DEF(nop2, 0, 0, 2, TCG_OPF_NOT_PRESENT) +DEF(nop3, 0, 0, 3, TCG_OPF_NOT_PRESENT) -DEF(discard, 1, 0, 0, 0) +/* variable number of parameters */ +DEF(nopn, 0, 0, 1, TCG_OPF_NOT_PRESENT) + +DEF(discard, 1, 0, 0, TCG_OPF_NOT_PRESENT) +DEF(set_label, 0, 0, 1, TCG_OPF_BB_END | TCG_OPF_NOT_PRESENT) + +/* variable number of parameters */ +DEF(call, 0, 1, 2, TCG_OPF_CALL_CLOBBER) -DEF(set_label, 0, 0, 1, TCG_OPF_BB_END) -DEF(call, 0, 1, 2, TCG_OPF_CALL_CLOBBER) /* variable number of parameters */ DEF(br, 0, 0, 1, TCG_OPF_BB_END) #define IMPL(X) (__builtin_constant_p(X) && !(X) ? TCG_OPF_NOT_PRESENT : 0) @@ -166,9 +170,9 @@ DEF(muls2_i64, 2, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_muls2_i64)) /* QEMU specific */ #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS -DEF(debug_insn_start, 0, 0, 2, 0) +DEF(debug_insn_start, 0, 0, 2, TCG_OPF_NOT_PRESENT) #else -DEF(debug_insn_start, 0, 0, 1, 0) +DEF(debug_insn_start, 0, 0, 1, TCG_OPF_NOT_PRESENT) #endif DEF(exit_tb, 0, 0, 1, TCG_OPF_BB_END) DEF(goto_tb, 0, 0, 1, TCG_OPF_BB_END) diff --git a/tcg/tcg.c b/tcg/tcg.c index 1d8099c..c7e6567 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -1160,9 +1160,7 @@ void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) i = 0; for (op = 0; op < ARRAY_SIZE(tcg_op_defs); op++) { const TCGOpDef *def = &tcg_op_defs[op]; - if (op < INDEX_op_call - || op == INDEX_op_debug_insn_start - || (def->flags & TCG_OPF_NOT_PRESENT)) { + if (def->flags & TCG_OPF_NOT_PRESENT) { /* Wrong entry in op definitions? */ if (def->used) { fprintf(stderr, "Invalid op definition for %s\n", def->name); diff --git a/tcg/tcg.h b/tcg/tcg.h index 28ca1bd..f3f9889 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -596,7 +596,8 @@ enum { TCG_OPF_SIDE_EFFECTS = 0x04, /* Instruction operands are 64-bits (otherwise 32-bits). */ TCG_OPF_64BIT = 0x08, - /* Instruction is optional and not implemented by the host. */ + /* Instruction is optional and not implemented by the host, or insn + is generic and should not be implemened by the host. */ TCG_OPF_NOT_PRESENT = 0x10, }; -- 1.8.1.4