From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54054) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gMK35-0003U8-4F for qemu-devel@nongnu.org; Mon, 12 Nov 2018 16:47:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gMK33-0004uR-MV for qemu-devel@nongnu.org; Mon, 12 Nov 2018 16:47:11 -0500 Received: from mail-wm1-x342.google.com ([2a00:1450:4864:20::342]:35985) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gMK33-0004uC-Fz for qemu-devel@nongnu.org; Mon, 12 Nov 2018 16:47:09 -0500 Received: by mail-wm1-x342.google.com with SMTP id s11so182944wmh.1 for ; Mon, 12 Nov 2018 13:47:09 -0800 (PST) From: Richard Henderson Date: Mon, 12 Nov 2018 22:44:48 +0100 Message-Id: <20181112214503.22941-3-richard.henderson@linaro.org> In-Reply-To: <20181112214503.22941-1-richard.henderson@linaro.org> References: <20181112214503.22941-1-richard.henderson@linaro.org> Subject: [Qemu-devel] [PATCH for-4.0 02/17] tcg/i386: Return a base register from tcg_out_tlb_load List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: cota@braap.org We will shortly be asking the hot path not to assume TCG_REG_L1 for the host base address. Signed-off-by: Richard Henderson --- tcg/i386/tcg-target.inc.c | 56 ++++++++++++++++++++------------------- 1 file changed, 29 insertions(+), 27 deletions(-) diff --git a/tcg/i386/tcg-target.inc.c b/tcg/i386/tcg-target.inc.c index e4d9be57ff..4435a7bb52 100644 --- a/tcg/i386/tcg-target.inc.c +++ b/tcg/i386/tcg-target.inc.c @@ -1611,9 +1611,9 @@ static void * const qemu_st_helpers[16] = { First argument register is clobbered. */ -static inline void tcg_out_tlb_load(TCGContext *s, TCGReg addrlo, TCGReg addrhi, - int mem_index, TCGMemOp opc, - tcg_insn_unit **label_ptr, int which) +static TCGReg tcg_out_tlb_load(TCGContext *s, TCGReg addrlo, TCGReg addrhi, + int mem_index, TCGMemOp opc, + tcg_insn_unit **label_ptr, int which) { const TCGReg r0 = TCG_REG_L0; const TCGReg r1 = TCG_REG_L1; @@ -1693,6 +1693,8 @@ static inline void tcg_out_tlb_load(TCGContext *s, TCGReg addrlo, TCGReg addrhi, /* add addend(r0), r1 */ tcg_out_modrm_offset(s, OPC_ADD_GvEv + hrexw, r1, r0, offsetof(CPUTLBEntry, addend) - which); + + return r1; } /* @@ -1998,10 +2000,6 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64) TCGReg addrhi __attribute__((unused)); TCGMemOpIdx oi; TCGMemOp opc; -#if defined(CONFIG_SOFTMMU) - int mem_index; - tcg_insn_unit *label_ptr[2]; -#endif datalo = *args++; datahi = (TCG_TARGET_REG_BITS == 32 && is64 ? *args++ : 0); @@ -2011,17 +2009,21 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64) opc = get_memop(oi); #if defined(CONFIG_SOFTMMU) - mem_index = get_mmuidx(oi); + { + int mem_index = get_mmuidx(oi); + tcg_insn_unit *label_ptr[2]; + TCGReg base; - tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, - label_ptr, offsetof(CPUTLBEntry, addr_read)); + base = tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, + label_ptr, offsetof(CPUTLBEntry, addr_read)); - /* TLB Hit. */ - tcg_out_qemu_ld_direct(s, datalo, datahi, TCG_REG_L1, -1, 0, 0, opc); + /* TLB Hit. */ + tcg_out_qemu_ld_direct(s, datalo, datahi, base, -1, 0, 0, opc); - /* Record the current context of a load into ldst label */ - add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi, - s->code_ptr, label_ptr); + /* Record the current context of a load into ldst label */ + add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi, + s->code_ptr, label_ptr); + } #else { int32_t offset = guest_base; @@ -2138,10 +2140,6 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) TCGReg addrhi __attribute__((unused)); TCGMemOpIdx oi; TCGMemOp opc; -#if defined(CONFIG_SOFTMMU) - int mem_index; - tcg_insn_unit *label_ptr[2]; -#endif datalo = *args++; datahi = (TCG_TARGET_REG_BITS == 32 && is64 ? *args++ : 0); @@ -2151,17 +2149,21 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) opc = get_memop(oi); #if defined(CONFIG_SOFTMMU) - mem_index = get_mmuidx(oi); + { + int mem_index = get_mmuidx(oi); + tcg_insn_unit *label_ptr[2]; + TCGReg base; - tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, - label_ptr, offsetof(CPUTLBEntry, addr_write)); + base = tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, + label_ptr, offsetof(CPUTLBEntry, addr_write)); - /* TLB Hit. */ - tcg_out_qemu_st_direct(s, datalo, datahi, TCG_REG_L1, 0, 0, opc); + /* TLB Hit. */ + tcg_out_qemu_st_direct(s, datalo, datahi, base, 0, 0, opc); - /* Record the current context of a store into ldst label */ - add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi, - s->code_ptr, label_ptr); + /* Record the current context of a store into ldst label */ + add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi, + s->code_ptr, label_ptr); + } #else { int32_t offset = guest_base; -- 2.17.2