From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1OA51v-00062j-1c for qemu-devel@nongnu.org; Thu, 06 May 2010 13:38:35 -0400 Received: from [140.186.70.92] (port=51426 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OA511-00056v-22 for qemu-devel@nongnu.org; Thu, 06 May 2010 13:38:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OA50R-0004nU-IF for qemu-devel@nongnu.org; Thu, 06 May 2010 13:37:16 -0400 Received: from are.twiddle.net ([75.149.56.221]:47609) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OA50R-0004mk-5a for qemu-devel@nongnu.org; Thu, 06 May 2010 13:37:03 -0400 From: Richard Henderson Date: Thu, 6 May 2010 08:50:43 -0700 Message-Id: <1273161045-2880-4-git-send-email-rth@twiddle.net> In-Reply-To: <1273161045-2880-1-git-send-email-rth@twiddle.net> References: <1273161045-2880-1-git-send-email-rth@twiddle.net> Subject: [Qemu-devel] [PATCH 3/5] tcg-ia64: Fix some register usage issues. List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aurelien@aurel32.net (1) The output registers were not marked call-clobbered, even though they can be modified by called functions. (2) The thread pointer was not marked reserved. (3) R4-R6 are call-saved, but not saved by the prologue. Rather than save them, mark them reserved so that we don't use them. Signed-off-by: Richard Henderson --- tcg/ia64/tcg-target.c | 67 ++++++++++++++++++++++++++++++------------------ 1 files changed, 42 insertions(+), 25 deletions(-) diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c index 401dfec..acd4ce8 100644 --- a/tcg/ia64/tcg-target.c +++ b/tcg/ia64/tcg-target.c @@ -2283,39 +2283,56 @@ void tcg_target_init(TCGContext *s) 0xffffffffffffffffull); tcg_regset_set(tcg_target_available_regs[TCG_TYPE_I64], 0xffffffffffffffffull); - tcg_regset_set(tcg_target_call_clobber_regs, - (1 << TCG_REG_R8) | - (1 << TCG_REG_R9) | - (1 << TCG_REG_R10) | - (1 << TCG_REG_R11) | - (1 << TCG_REG_R13) | - (1 << TCG_REG_R14) | - (1 << TCG_REG_R15) | - (1 << TCG_REG_R16) | - (1 << TCG_REG_R17) | - (1 << TCG_REG_R18) | - (1 << TCG_REG_R19) | - (1 << TCG_REG_R20) | - (1 << TCG_REG_R21) | - (1 << TCG_REG_R22) | - (1 << TCG_REG_R23) | - (1 << TCG_REG_R24) | - (1 << TCG_REG_R25) | - (1 << TCG_REG_R26) | - (1 << TCG_REG_R27) | - (1 << TCG_REG_R28) | - (1 << TCG_REG_R29) | - (1 << TCG_REG_R30) | - (1 << TCG_REG_R31)); - tcg_regset_clear(s->reserved_regs); + tcg_regset_clear(tcg_target_call_clobber_regs); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R8); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R9); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R10); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R11); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R15); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R16); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R17); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R18); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R19); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R20); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R21); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R22); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R23); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R24); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R25); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R26); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R27); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R28); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R29); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R30); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R31); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R56); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R57); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R58); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R59); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R60); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R61); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R62); + tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R63); + + tcg_regset_clear(s->reserved_regs); tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0); /* zero register */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R1); /* global pointer */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R2); /* internal use */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R3); /* internal use */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R12); /* stack pointer */ + tcg_regset_set_reg(s->reserved_regs, TCG_REG_R13); /* thread pointer */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R32); /* return address */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R33); /* PFS */ + /* The following 3 are not in use, are call-saved, but *not* saved + by the prologue. Therefore we cannot use them without modifying + the prologue. There doesn't seem to be any good reason to use + these as opposed to the windowed registers. */ + tcg_regset_set_reg(s->reserved_regs, TCG_REG_R4); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_R5); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_R6); + tcg_add_target_add_op_defs(ia64_op_defs); } -- 1.7.0.1