From patchwork Fri Apr 22 17:40:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Anton Johansson X-Patchwork-Id: 12823952 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 237C2C433EF for ; Fri, 22 Apr 2022 18:06:38 +0000 (UTC) Received: from localhost ([::1]:47030 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nhxfx-0005WJ-0i for qemu-devel@archiver.kernel.org; Fri, 22 Apr 2022 14:06:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58114) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nhxHi-0008BB-EA for qemu-devel@nongnu.org; Fri, 22 Apr 2022 13:41:35 -0400 Received: from rev.ng ([5.9.113.41]:48667) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nhxHd-00068Z-8H for qemu-devel@nongnu.org; Fri, 22 Apr 2022 13:41:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=rev.ng; s=dkim; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=O/hfZWe0x3qj4Hll1FigjyNi30lFxu2GcRZnmLqUvJY=; b=dFwzvz/Cm1yxJxii/AQqayuxNJ skWgxnPwlAvgmv9t+kWXvBracf32/xDQU6MMu5oqaod0cVCCuGVV6yhRaQK49aPxei4I2tDnlUxsp k3/IL2q2btWm6+MNCZXckWBuny4w6kn6+Y6bpDpAB8s0FtTVZHs7c0D7jQne697ibEPk=; To: qemu-devel@nongnu.org Cc: ale@rev.ng, tsimpson@quicinc.com, bcain@quicinc.com, mlambert@quicinc.com, babush@rev.ng, nizzo@rev.ng, richard.henderson@linaro.org Subject: [PATCH v9 05/12] target/hexagon: introduce new helper functions Date: Fri, 22 Apr 2022 19:40:52 +0200 Message-Id: <20220422174059.4304-6-anjo@rev.ng> In-Reply-To: <20220422174059.4304-1-anjo@rev.ng> References: <20220422174059.4304-1-anjo@rev.ng> MIME-Version: 1.0 Received-SPF: pass client-ip=5.9.113.41; envelope-from=anjo@rev.ng; helo=rev.ng X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reply-to: Anton Johansson X-Patchwork-Original-From: Anton Johansson via From: Anton Johansson From: Niccolò Izzo These helpers will be employed by the idef-parser generated code, to correctly implement instruction semantics. "Helper" functions, in the context of this patch, refers to functions which provide a manual TCG implementation of certain features. Signed-off-by: Alessandro Di Federico Signed-off-by: Niccolò Izzo Signed-off-by: Anton Johansson Reviewed-by: Taylor Simpson --- target/hexagon/genptr.c | 178 ++++++++++++++++++++++++++++++++++++++-- target/hexagon/genptr.h | 17 +++- target/hexagon/macros.h | 9 ++ 3 files changed, 196 insertions(+), 8 deletions(-) diff --git a/target/hexagon/genptr.c b/target/hexagon/genptr.c index 8d1b3f6e2e..036d0cef2e 100644 --- a/target/hexagon/genptr.c +++ b/target/hexagon/genptr.c @@ -31,6 +31,12 @@ #include "gen_tcg_hvx.h" #include "genptr.h" +TCGv gen_read_reg(TCGv result, int num) +{ + tcg_gen_mov_tl(result, hex_gpr[num]); + return result; +} + TCGv gen_read_preg(TCGv pred, uint8_t num) { tcg_gen_mov_tl(pred, hex_pred[num]); @@ -403,18 +409,19 @@ static inline void gen_store_conditional8(DisasContext *ctx, tcg_gen_movi_tl(hex_llsc_addr, ~0); } -void gen_store32(TCGv vaddr, TCGv src, int width, uint32_t slot) +void gen_store32(DisasContext *ctx, TCGv vaddr, TCGv src, tcg_target_long width, + uint32_t slot) { tcg_gen_mov_tl(hex_store_addr[slot], vaddr); tcg_gen_movi_tl(hex_store_width[slot], width); tcg_gen_mov_tl(hex_store_val32[slot], src); + ctx->store_width[slot] = width; } void gen_store1(TCGv_env cpu_env, TCGv vaddr, TCGv src, DisasContext *ctx, uint32_t slot) { - gen_store32(vaddr, src, 1, slot); - ctx->store_width[slot] = 1; + gen_store32(ctx, vaddr, src, 1, slot); } void gen_store1i(TCGv_env cpu_env, TCGv vaddr, int32_t src, DisasContext *ctx, @@ -427,8 +434,7 @@ void gen_store1i(TCGv_env cpu_env, TCGv vaddr, int32_t src, DisasContext *ctx, void gen_store2(TCGv_env cpu_env, TCGv vaddr, TCGv src, DisasContext *ctx, uint32_t slot) { - gen_store32(vaddr, src, 2, slot); - ctx->store_width[slot] = 2; + gen_store32(ctx, vaddr, src, 2, slot); } void gen_store2i(TCGv_env cpu_env, TCGv vaddr, int32_t src, DisasContext *ctx, @@ -441,8 +447,7 @@ void gen_store2i(TCGv_env cpu_env, TCGv vaddr, int32_t src, DisasContext *ctx, void gen_store4(TCGv_env cpu_env, TCGv vaddr, TCGv src, DisasContext *ctx, uint32_t slot) { - gen_store32(vaddr, src, 4, slot); - ctx->store_width[slot] = 4; + gen_store32(ctx, vaddr, src, 4, slot); } void gen_store4i(TCGv_env cpu_env, TCGv vaddr, int32_t src, DisasContext *ctx, @@ -647,5 +652,164 @@ static void vec_to_qvec(size_t size, intptr_t dstoff, intptr_t srcoff) tcg_temp_free_i64(mask); } +void gen_set_usr_field(int field, TCGv val) +{ + tcg_gen_deposit_tl(hex_new_value[HEX_REG_USR], hex_new_value[HEX_REG_USR], + val, + reg_field_info[field].offset, + reg_field_info[field].width); +} + +void gen_set_usr_fieldi(int field, int x) +{ + TCGv val = tcg_constant_tl(x); + gen_set_usr_field(field, val); +} + +/* + * Note: Since this function might branch, `val` is + * required to be a `tcg_temp_local`. + */ +void gen_set_usr_field_if(int field, TCGv val) +{ + /* Sets the USR field if `val` is non-zero */ + if (reg_field_info[field].width == 1) { + TCGv tmp = tcg_temp_new(); + tcg_gen_extract_tl(tmp, val, 0, reg_field_info[field].width); + tcg_gen_shli_tl(tmp, tmp, reg_field_info[field].offset); + tcg_gen_or_tl(hex_new_value[HEX_REG_USR], + hex_new_value[HEX_REG_USR], + tmp); + tcg_temp_free(tmp); + } else { + TCGLabel *skip_label = gen_new_label(); + tcg_gen_brcondi_tl(TCG_COND_EQ, val, 0, skip_label); + gen_set_usr_field(field, val); + gen_set_label(skip_label); + } +} + +void gen_write_new_pc(TCGv addr) +{ + /* If there are multiple branches in a packet, ignore the second one */ + TCGv zero = tcg_constant_tl(0); + tcg_gen_movcond_tl(TCG_COND_NE, hex_next_PC, hex_branch_taken, zero, + hex_next_PC, addr); + tcg_gen_movi_tl(hex_branch_taken, 1); +} + +void gen_sat_i32(TCGv dest, TCGv source, int width) +{ + TCGv max_val = tcg_constant_tl((1 << (width - 1)) - 1); + TCGv min_val = tcg_constant_tl(-(1 << (width - 1))); + tcg_gen_smin_tl(dest, source, max_val); + tcg_gen_smax_tl(dest, dest, min_val); +} + +void gen_sat_i32_ovfl(TCGv ovfl, TCGv dest, TCGv source, int width) +{ + gen_sat_i32(dest, source, width); + tcg_gen_setcond_tl(TCG_COND_NE, ovfl, source, dest); +} + +void gen_satu_i32(TCGv dest, TCGv source, int width) +{ + TCGv max_val = tcg_constant_tl((1 << width) - 1); + TCGv zero = tcg_constant_tl(0); + tcg_gen_movcond_tl(TCG_COND_GTU, dest, source, max_val, max_val, source); + tcg_gen_movcond_tl(TCG_COND_LT, dest, source, zero, zero, dest); +} + +void gen_satu_i32_ovfl(TCGv ovfl, TCGv dest, TCGv source, int width) +{ + gen_satu_i32(dest, source, width); + tcg_gen_setcond_tl(TCG_COND_NE, ovfl, source, dest); +} + +void gen_sat_i64(TCGv_i64 dest, TCGv_i64 source, int width) +{ + TCGv_i64 max_val = tcg_constant_i64((1LL << (width - 1)) - 1LL); + TCGv_i64 min_val = tcg_constant_i64(-(1LL << (width - 1))); + tcg_gen_smin_i64(dest, source, max_val); + tcg_gen_smax_i64(dest, dest, min_val); +} + +void gen_sat_i64_ovfl(TCGv ovfl, TCGv_i64 dest, TCGv_i64 source, int width) +{ + TCGv_i64 ovfl_64; + gen_sat_i64(dest, source, width); + ovfl_64 = tcg_temp_new_i64(); + tcg_gen_setcond_i64(TCG_COND_NE, ovfl_64, dest, source); + tcg_gen_trunc_i64_tl(ovfl, ovfl_64); + tcg_temp_free_i64(ovfl_64); +} + +void gen_satu_i64(TCGv_i64 dest, TCGv_i64 source, int width) +{ + TCGv_i64 max_val = tcg_constant_i64((1LL << width) - 1LL); + TCGv_i64 zero = tcg_constant_i64(0); + tcg_gen_movcond_i64(TCG_COND_GTU, dest, source, max_val, max_val, source); + tcg_gen_movcond_i64(TCG_COND_LT, dest, source, zero, zero, dest); +} + +void gen_satu_i64_ovfl(TCGv ovfl, TCGv_i64 dest, TCGv_i64 source, int width) +{ + TCGv_i64 ovfl_64; + gen_satu_i64(dest, source, width); + ovfl_64 = tcg_temp_new_i64(); + tcg_gen_setcond_i64(TCG_COND_NE, ovfl_64, dest, source); + tcg_gen_trunc_i64_tl(ovfl, ovfl_64); + tcg_temp_free_i64(ovfl_64); +} + +/* Implements the fADDSAT64 macro in TCG */ +void gen_add_sat_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b) +{ + TCGv_i64 sum = tcg_temp_local_new_i64(); + TCGv_i64 xor = tcg_temp_new_i64(); + TCGv_i64 cond1 = tcg_temp_new_i64(); + TCGv_i64 cond2 = tcg_temp_local_new_i64(); + TCGv_i64 cond3 = tcg_temp_new_i64(); + TCGv_i64 mask = tcg_constant_i64(0x8000000000000000ULL); + TCGv_i64 max_pos = tcg_constant_i64(0x7FFFFFFFFFFFFFFFLL); + TCGv_i64 max_neg = tcg_constant_i64(0x8000000000000000LL); + TCGv_i64 zero = tcg_constant_i64(0); + TCGLabel *no_ovfl_label = gen_new_label(); + TCGLabel *ovfl_label = gen_new_label(); + TCGLabel *ret_label = gen_new_label(); + + tcg_gen_add_i64(sum, a, b); + tcg_gen_xor_i64(xor, a, b); + + /* if (xor & mask) */ + tcg_gen_and_i64(cond1, xor, mask); + tcg_temp_free_i64(xor); + tcg_gen_brcondi_i64(TCG_COND_NE, cond1, 0, no_ovfl_label); + tcg_temp_free_i64(cond1); + + /* else if ((a ^ sum) & mask) */ + tcg_gen_xor_i64(cond2, a, sum); + tcg_gen_and_i64(cond2, cond2, mask); + tcg_gen_brcondi_i64(TCG_COND_NE, cond2, 0, ovfl_label); + tcg_temp_free_i64(cond2); + /* fallthrough to no_ovfl_label branch */ + + /* if branch */ + gen_set_label(no_ovfl_label); + tcg_gen_mov_i64(ret, sum); + tcg_gen_br(ret_label); + + /* else if branch */ + gen_set_label(ovfl_label); + tcg_gen_and_i64(cond3, sum, mask); + tcg_temp_free_i64(mask); + tcg_temp_free_i64(sum); + tcg_gen_movcond_i64(TCG_COND_NE, ret, cond3, zero, max_pos, max_neg); + tcg_temp_free_i64(cond3); + SET_USR_FIELD(USR_OVF, 1); + + gen_set_label(ret_label); +} + #include "tcg_funcs_generated.c.inc" #include "tcg_func_table_generated.c.inc" diff --git a/target/hexagon/genptr.h b/target/hexagon/genptr.h index d71dd7e1ce..5e3060fb6c 100644 --- a/target/hexagon/genptr.h +++ b/target/hexagon/genptr.h @@ -24,7 +24,8 @@ extern const SemanticInsn opcode_genptr[]; -void gen_store32(TCGv vaddr, TCGv src, int width, uint32_t slot); +void gen_store32(DisasContext *ctx, TCGv vaddr, TCGv src, tcg_target_long width, + uint32_t slot); void gen_store1(TCGv_env cpu_env, TCGv vaddr, TCGv src, DisasContext *ctx, uint32_t slot); void gen_store2(TCGv_env cpu_env, TCGv vaddr, TCGv src, DisasContext *ctx, @@ -44,6 +45,19 @@ void gen_store8i(TCGv_env cpu_env, TCGv vaddr, int64_t src, DisasContext *ctx, TCGv gen_read_preg(TCGv pred, uint8_t num); void gen_log_reg_write(int rnum, TCGv val); void gen_log_pred_write(DisasContext *ctx, int pnum, TCGv val); +void gen_write_new_pc(TCGv addr); +void gen_set_usr_field(int field, TCGv val); +void gen_set_usr_fieldi(int field, int x); +void gen_set_usr_field_if(int field, TCGv val); +void gen_sat_i32(TCGv dest, TCGv source, int width); +void gen_sat_i32_ovfl(TCGv ovfl, TCGv dest, TCGv source, int width); +void gen_satu_i32(TCGv dest, TCGv source, int width); +void gen_satu_i32_ovfl(TCGv ovfl, TCGv dest, TCGv source, int width); +void gen_sat_i64(TCGv_i64 dest, TCGv_i64 source, int width); +void gen_sat_i64_ovfl(TCGv ovfl, TCGv_i64 dest, TCGv_i64 source, int width); +void gen_satu_i64(TCGv_i64 dest, TCGv_i64 source, int width); +void gen_satu_i64_ovfl(TCGv ovfl, TCGv_i64 dest, TCGv_i64 source, int width); +void gen_add_sat_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b); TCGv gen_8bitsof(TCGv result, TCGv value); void gen_set_byte_i64(int N, TCGv_i64 result, TCGv src); TCGv gen_get_byte(TCGv result, int N, TCGv src, bool sign); @@ -51,5 +65,6 @@ TCGv gen_get_byte_i64(TCGv result, int N, TCGv_i64 src, bool sign); TCGv gen_get_half(TCGv result, int N, TCGv src, bool sign); void gen_set_half(int N, TCGv result, TCGv src); void gen_set_half_i64(int N, TCGv_i64 result, TCGv src); +TCGv gen_read_reg(TCGv result, int num); #endif diff --git a/target/hexagon/macros.h b/target/hexagon/macros.h index 5ea2d54ebe..9ce07ba5e2 100644 --- a/target/hexagon/macros.h +++ b/target/hexagon/macros.h @@ -180,7 +180,16 @@ #define MEM_STORE8(VA, DATA, SLOT) log_store64(env, VA, DATA, 8, SLOT) #endif +#ifdef QEMU_GENERATE +static inline void gen_cancel(uint32_t slot) +{ + tcg_gen_ori_tl(hex_slot_cancelled, hex_slot_cancelled, 1 << slot); +} + +#define CANCEL gen_cancel(slot); +#else #define CANCEL cancel_slot(env, slot) +#endif #define LOAD_CANCEL(EA) do { CANCEL; } while (0)