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[97.113.188.82]) by smtp.gmail.com with ESMTPSA id w68sm5616666pfb.176.2019.03.19.10.21.33 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 19 Mar 2019 10:21:33 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Tue, 19 Mar 2019 10:21:13 -0700 Message-Id: <20190319172126.7502-5-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190319172126.7502-1-richard.henderson@linaro.org> References: <20190319172126.7502-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::531 Subject: [Qemu-devel] [PATCH for-4.1 v3 04/17] tcg: Support cross-class moves without instruction support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.cave-ayland@ilande.co.uk, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" PowerPC Altivec does not support direct moves between vector registers and general registers. So when tcg_out_mov fails, we can use the backing memory for the temporary to perform the move. Signed-off-by: Richard Henderson --- tcg/tcg.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) -- 2.17.2 diff --git a/tcg/tcg.c b/tcg/tcg.c index 34ee06564f..b5389ea767 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -3369,7 +3369,18 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOp *op) ots->indirect_base); } if (!tcg_out_mov(s, otype, ots->reg, ts->reg)) { - abort(); + /* Cross register class move not supported. + Store the source register into the destination slot + and leave the destination temp as TEMP_VAL_MEM. */ + assert(!ots->fixed_reg); + if (!ts->mem_allocated) { + temp_allocate_frame(s, ots); + } + tcg_out_st(s, ts->type, ts->reg, + ots->mem_base->reg, ots->mem_offset); + ots->mem_coherent = 1; + temp_free_or_dead(s, ots, -1); + return; } } ots->val_type = TEMP_VAL_REG; @@ -3471,7 +3482,11 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op) reg = tcg_reg_alloc(s, arg_ct->u.regs, i_allocated_regs, o_preferred_regs, ts->indirect_base); if (!tcg_out_mov(s, ts->type, reg, ts->reg)) { - abort(); + /* Cross register class move not supported. Sync the + temp back to its slot and load from there. */ + temp_sync(s, ts, i_allocated_regs, 0, 0); + tcg_out_ld(s, ts->type, reg, + ts->mem_base->reg, ts->mem_offset); } } new_args[i] = reg; @@ -3630,7 +3645,11 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op) if (ts->reg != reg) { tcg_reg_free(s, reg, allocated_regs); if (!tcg_out_mov(s, ts->type, reg, ts->reg)) { - abort(); + /* Cross register class move not supported. Sync the + temp back to its slot and load from there. */ + temp_sync(s, ts, allocated_regs, 0, 0); + tcg_out_ld(s, ts->type, reg, + ts->mem_base->reg, ts->mem_offset); } } } else {