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[97.113.165.104]) by smtp.gmail.com with ESMTPSA id a17sm3532594pfk.173.2017.10.20.16.20.26 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 20 Oct 2017 16:20:26 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 20 Oct 2017 16:19:32 -0700 Message-Id: <20171020232023.15010-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20171020232023.15010-1-richard.henderson@linaro.org> References: <20171020232023.15010-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c00::243 Subject: [Qemu-devel] [PATCH v7 01/52] tcg: Merge opcode arguments into TCGOp 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: pbonzini@redhat.com, cota@braap.org, f4bug@amsat.org, Richard Henderson Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Richard Henderson Rather than have a separate buffer of 10*max_ops entries, give each opcode 10 entries. The result is actually a bit smaller and should have slightly more cache locality. Reviewed-by: Emilio G. Cota Signed-off-by: Richard Henderson --- tcg/tcg.h | 37 ++++++++++------------ tcg/optimize.c | 6 ++-- tcg/tcg-op.c | 99 +++++++++++++++++++++------------------------------------- tcg/tcg.c | 98 ++++++++++++++++++++++++++------------------------------- 4 files changed, 98 insertions(+), 142 deletions(-) -- 2.13.6 diff --git a/tcg/tcg.h b/tcg/tcg.h index b2d42e3136..2cefd9f125 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -51,8 +51,6 @@ #define OPC_BUF_SIZE 640 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR) -#define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM) - #define CPU_TEMP_BUF_NLONGS 128 /* Default target word size to pointer size. */ @@ -606,33 +604,33 @@ typedef struct TCGTempSet { #define SYNC_ARG 1 typedef uint16_t TCGLifeData; -/* The layout here is designed to avoid crossing of a 32-bit boundary. - If we do so, gcc adds padding, expanding the size to 12. */ +/* The layout here is designed to avoid a bitfield crossing of + a 32-bit boundary, which would cause GCC to add extra padding. */ typedef struct TCGOp { TCGOpcode opc : 8; /* 8 */ - /* Index of the prev/next op, or 0 for the end of the list. */ - unsigned prev : 10; /* 18 */ - unsigned next : 10; /* 28 */ - /* The number of out and in parameter for a call. */ - unsigned calli : 4; /* 32 */ - unsigned callo : 2; /* 34 */ + unsigned calli : 4; /* 12 */ + unsigned callo : 2; /* 14 */ + unsigned : 2; /* 16 */ - /* Index of the arguments for this op, or 0 for zero-operand ops. */ - unsigned args : 14; /* 48 */ + /* Index of the prev/next op, or 0 for the end of the list. */ + unsigned prev : 16; /* 32 */ + unsigned next : 16; /* 48 */ /* Lifetime data of the operands. */ unsigned life : 16; /* 64 */ + + /* Arguments for the opcode. */ + TCGArg args[MAX_OPC_PARAM]; } TCGOp; +/* Make sure that we don't expand the structure without noticing. */ +QEMU_BUILD_BUG_ON(sizeof(TCGOp) != 8 + sizeof(TCGArg) * MAX_OPC_PARAM); + /* Make sure operands fit in the bitfields above. */ QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8)); -QEMU_BUILD_BUG_ON(OPC_BUF_SIZE > (1 << 10)); -QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE > (1 << 14)); - -/* Make sure that we don't overflow 64 bits without noticing. */ -QEMU_BUILD_BUG_ON(sizeof(TCGOp) > 8); +QEMU_BUILD_BUG_ON(OPC_BUF_SIZE > (1 << 16)); struct TCGContext { uint8_t *pool_cur, *pool_end; @@ -682,7 +680,6 @@ struct TCGContext { #endif int gen_next_op_idx; - int gen_next_parm_idx; /* Code generation. Note that we specifically do not use tcg_insn_unit here, because there's too much arithmetic throughout that relies @@ -720,7 +717,6 @@ struct TCGContext { TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS]; TCGOp gen_op_buf[OPC_BUF_SIZE]; - TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE]; uint16_t gen_insn_end_off[TCG_MAX_INSNS]; target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS]; @@ -731,8 +727,7 @@ extern bool parallel_cpus; static inline void tcg_set_insn_param(int op_idx, int arg, TCGArg v) { - int op_argi = tcg_ctx.gen_op_buf[op_idx].args; - tcg_ctx.gen_opparam_buf[op_argi + arg] = v; + tcg_ctx.gen_op_buf[op_idx].args[arg] = v; } /* The number of opcodes emitted so far. */ diff --git a/tcg/optimize.c b/tcg/optimize.c index adfc56ce62..002aad6bf4 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -576,7 +576,7 @@ void tcg_optimize(TCGContext *s) TCGArg tmp; TCGOp * const op = &s->gen_op_buf[oi]; - TCGArg * const args = &s->gen_opparam_buf[op->args]; + TCGArg * const args = op->args; TCGOpcode opc = op->opc; const TCGOpDef *def = &tcg_op_defs[opc]; @@ -1184,7 +1184,7 @@ void tcg_optimize(TCGContext *s) uint64_t b = ((uint64_t)bh << 32) | bl; TCGArg rl, rh; TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_movi_i32, 2); - TCGArg *args2 = &s->gen_opparam_buf[op2->args]; + TCGArg *args2 = op2->args; if (opc == INDEX_op_add2_i32) { a += b; @@ -1210,7 +1210,7 @@ void tcg_optimize(TCGContext *s) uint64_t r = (uint64_t)a * b; TCGArg rl, rh; TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_movi_i32, 2); - TCGArg *args2 = &s->gen_opparam_buf[op2->args]; + TCGArg *args2 = op2->args; rl = args[0]; rh = args[1]; diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index d3c0e4799e..bd84a782e3 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -46,107 +46,78 @@ extern TCGv_i32 TCGV_HIGH_link_error(TCGv_i64); Up to and including filling in the forward link immediately. We'll do proper termination of the end of the list after we finish translation. */ -static void tcg_emit_op(TCGContext *ctx, TCGOpcode opc, int args) +static inline TCGOp *tcg_emit_op(TCGContext *ctx, TCGOpcode opc) { int oi = ctx->gen_next_op_idx; int ni = oi + 1; int pi = oi - 1; + TCGOp *op = &ctx->gen_op_buf[oi]; tcg_debug_assert(oi < OPC_BUF_SIZE); ctx->gen_op_buf[0].prev = oi; ctx->gen_next_op_idx = ni; - ctx->gen_op_buf[oi] = (TCGOp){ - .opc = opc, - .args = args, - .prev = pi, - .next = ni - }; + memset(op, 0, offsetof(TCGOp, args)); + op->opc = opc; + op->prev = pi; + op->next = ni; + + return op; } void tcg_gen_op1(TCGContext *ctx, TCGOpcode opc, TCGArg a1) { - int pi = ctx->gen_next_parm_idx; - - tcg_debug_assert(pi + 1 <= OPPARAM_BUF_SIZE); - ctx->gen_next_parm_idx = pi + 1; - ctx->gen_opparam_buf[pi] = a1; - - tcg_emit_op(ctx, opc, pi); + TCGOp *op = tcg_emit_op(ctx, opc); + op->args[0] = a1; } void tcg_gen_op2(TCGContext *ctx, TCGOpcode opc, TCGArg a1, TCGArg a2) { - int pi = ctx->gen_next_parm_idx; - - tcg_debug_assert(pi + 2 <= OPPARAM_BUF_SIZE); - ctx->gen_next_parm_idx = pi + 2; - ctx->gen_opparam_buf[pi + 0] = a1; - ctx->gen_opparam_buf[pi + 1] = a2; - - tcg_emit_op(ctx, opc, pi); + TCGOp *op = tcg_emit_op(ctx, opc); + op->args[0] = a1; + op->args[1] = a2; } void tcg_gen_op3(TCGContext *ctx, TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3) { - int pi = ctx->gen_next_parm_idx; - - tcg_debug_assert(pi + 3 <= OPPARAM_BUF_SIZE); - ctx->gen_next_parm_idx = pi + 3; - ctx->gen_opparam_buf[pi + 0] = a1; - ctx->gen_opparam_buf[pi + 1] = a2; - ctx->gen_opparam_buf[pi + 2] = a3; - - tcg_emit_op(ctx, opc, pi); + TCGOp *op = tcg_emit_op(ctx, opc); + op->args[0] = a1; + op->args[1] = a2; + op->args[2] = a3; } void tcg_gen_op4(TCGContext *ctx, TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4) { - int pi = ctx->gen_next_parm_idx; - - tcg_debug_assert(pi + 4 <= OPPARAM_BUF_SIZE); - ctx->gen_next_parm_idx = pi + 4; - ctx->gen_opparam_buf[pi + 0] = a1; - ctx->gen_opparam_buf[pi + 1] = a2; - ctx->gen_opparam_buf[pi + 2] = a3; - ctx->gen_opparam_buf[pi + 3] = a4; - - tcg_emit_op(ctx, opc, pi); + TCGOp *op = tcg_emit_op(ctx, opc); + op->args[0] = a1; + op->args[1] = a2; + op->args[2] = a3; + op->args[3] = a4; } void tcg_gen_op5(TCGContext *ctx, TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4, TCGArg a5) { - int pi = ctx->gen_next_parm_idx; - - tcg_debug_assert(pi + 5 <= OPPARAM_BUF_SIZE); - ctx->gen_next_parm_idx = pi + 5; - ctx->gen_opparam_buf[pi + 0] = a1; - ctx->gen_opparam_buf[pi + 1] = a2; - ctx->gen_opparam_buf[pi + 2] = a3; - ctx->gen_opparam_buf[pi + 3] = a4; - ctx->gen_opparam_buf[pi + 4] = a5; - - tcg_emit_op(ctx, opc, pi); + TCGOp *op = tcg_emit_op(ctx, opc); + op->args[0] = a1; + op->args[1] = a2; + op->args[2] = a3; + op->args[3] = a4; + op->args[4] = a5; } void tcg_gen_op6(TCGContext *ctx, TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4, TCGArg a5, TCGArg a6) { - int pi = ctx->gen_next_parm_idx; - - tcg_debug_assert(pi + 6 <= OPPARAM_BUF_SIZE); - ctx->gen_next_parm_idx = pi + 6; - ctx->gen_opparam_buf[pi + 0] = a1; - ctx->gen_opparam_buf[pi + 1] = a2; - ctx->gen_opparam_buf[pi + 2] = a3; - ctx->gen_opparam_buf[pi + 3] = a4; - ctx->gen_opparam_buf[pi + 4] = a5; - ctx->gen_opparam_buf[pi + 5] = a6; - - tcg_emit_op(ctx, opc, pi); + TCGOp *op = tcg_emit_op(ctx, opc); + op->args[0] = a1; + op->args[1] = a2; + op->args[2] = a3; + op->args[3] = a4; + op->args[4] = a5; + op->args[5] = a6; } void tcg_gen_mb(TCGBar mb_type) diff --git a/tcg/tcg.c b/tcg/tcg.c index 4492e1eb3f..98673f2190 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -471,7 +471,6 @@ void tcg_func_start(TCGContext *s) s->gen_op_buf[0].next = 1; s->gen_op_buf[0].prev = 0; s->gen_next_op_idx = 1; - s->gen_next_parm_idx = 0; } static inline int temp_idx(TCGContext *s, TCGTemp *ts) @@ -980,9 +979,10 @@ bool tcg_op_supported(TCGOpcode op) void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, int nargs, TCGArg *args) { - int i, real_args, nb_rets, pi, pi_first; + int i, real_args, nb_rets, pi; unsigned sizemask, flags; TCGHelperInfo *info; + TCGOp *op; info = g_hash_table_lookup(helper_table, (gpointer)func); flags = info->flags; @@ -995,11 +995,11 @@ void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, int orig_sizemask = sizemask; int orig_nargs = nargs; TCGv_i64 retl, reth; + TCGArg split_args[MAX_OPC_PARAM]; TCGV_UNUSED_I64(retl); TCGV_UNUSED_I64(reth); if (sizemask != 0) { - TCGArg *split_args = __builtin_alloca(sizeof(TCGArg) * nargs * 2); for (i = real_args = 0; i < nargs; ++i) { int is_64bit = sizemask & (1 << (i+1)*2); if (is_64bit) { @@ -1034,7 +1034,19 @@ void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, } #endif /* TCG_TARGET_EXTEND_ARGS */ - pi_first = pi = s->gen_next_parm_idx; + i = s->gen_next_op_idx; + tcg_debug_assert(i < OPC_BUF_SIZE); + s->gen_op_buf[0].prev = i; + s->gen_next_op_idx = i + 1; + op = &s->gen_op_buf[i]; + + /* Set links for sequential allocation during translation. */ + memset(op, 0, offsetof(TCGOp, args)); + op->opc = INDEX_op_call; + op->prev = i - 1; + op->next = i + 1; + + pi = 0; if (ret != TCG_CALL_DUMMY_ARG) { #if defined(__sparc__) && !defined(__arch64__) \ && !defined(CONFIG_TCG_INTERPRETER) @@ -1044,31 +1056,33 @@ void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, two return temporaries, and reassemble below. */ retl = tcg_temp_new_i64(); reth = tcg_temp_new_i64(); - s->gen_opparam_buf[pi++] = GET_TCGV_I64(reth); - s->gen_opparam_buf[pi++] = GET_TCGV_I64(retl); + op->args[pi++] = GET_TCGV_I64(reth); + op->args[pi++] = GET_TCGV_I64(retl); nb_rets = 2; } else { - s->gen_opparam_buf[pi++] = ret; + op->args[pi++] = ret; nb_rets = 1; } #else if (TCG_TARGET_REG_BITS < 64 && (sizemask & 1)) { #ifdef HOST_WORDS_BIGENDIAN - s->gen_opparam_buf[pi++] = ret + 1; - s->gen_opparam_buf[pi++] = ret; + op->args[pi++] = ret + 1; + op->args[pi++] = ret; #else - s->gen_opparam_buf[pi++] = ret; - s->gen_opparam_buf[pi++] = ret + 1; + op->args[pi++] = ret; + op->args[pi++] = ret + 1; #endif nb_rets = 2; } else { - s->gen_opparam_buf[pi++] = ret; + op->args[pi++] = ret; nb_rets = 1; } #endif } else { nb_rets = 0; } + op->callo = nb_rets; + real_args = 0; for (i = 0; i < nargs; i++) { int is_64bit = sizemask & (1 << (i+1)*2); @@ -1076,7 +1090,7 @@ void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, #ifdef TCG_TARGET_CALL_ALIGN_ARGS /* some targets want aligned 64 bit args */ if (real_args & 1) { - s->gen_opparam_buf[pi++] = TCG_CALL_DUMMY_ARG; + op->args[pi++] = TCG_CALL_DUMMY_ARG; real_args++; } #endif @@ -1091,42 +1105,26 @@ void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, have to get more complicated to differentiate between stack arguments and register arguments. */ #if defined(HOST_WORDS_BIGENDIAN) != defined(TCG_TARGET_STACK_GROWSUP) - s->gen_opparam_buf[pi++] = args[i] + 1; - s->gen_opparam_buf[pi++] = args[i]; + op->args[pi++] = args[i] + 1; + op->args[pi++] = args[i]; #else - s->gen_opparam_buf[pi++] = args[i]; - s->gen_opparam_buf[pi++] = args[i] + 1; + op->args[pi++] = args[i]; + op->args[pi++] = args[i] + 1; #endif real_args += 2; continue; } - s->gen_opparam_buf[pi++] = args[i]; + op->args[pi++] = args[i]; real_args++; } - s->gen_opparam_buf[pi++] = (uintptr_t)func; - s->gen_opparam_buf[pi++] = flags; + op->args[pi++] = (uintptr_t)func; + op->args[pi++] = flags; + op->calli = real_args; - i = s->gen_next_op_idx; - tcg_debug_assert(i < OPC_BUF_SIZE); - tcg_debug_assert(pi <= OPPARAM_BUF_SIZE); - - /* Set links for sequential allocation during translation. */ - s->gen_op_buf[i] = (TCGOp){ - .opc = INDEX_op_call, - .callo = nb_rets, - .calli = real_args, - .args = pi_first, - .prev = i - 1, - .next = i + 1 - }; - - /* Make sure the calli field didn't overflow. */ - tcg_debug_assert(s->gen_op_buf[i].calli == real_args); - - s->gen_op_buf[0].prev = i; - s->gen_next_op_idx = i + 1; - s->gen_next_parm_idx = pi; + /* Make sure the fields didn't overflow. */ + tcg_debug_assert(op->calli == real_args); + tcg_debug_assert(pi <= ARRAY_SIZE(op->args)); #if defined(__sparc__) && !defined(__arch64__) \ && !defined(CONFIG_TCG_INTERPRETER) @@ -1286,7 +1284,7 @@ void tcg_dump_ops(TCGContext *s) op = &s->gen_op_buf[oi]; c = op->opc; def = &tcg_op_defs[c]; - args = &s->gen_opparam_buf[op->args]; + args = op->args; if (c == INDEX_op_insn_start) { col += qemu_log("%s ----", oi != s->gen_op_buf[0].next ? "\n" : ""); @@ -1570,20 +1568,16 @@ TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op, TCGOpcode opc, int nargs) { int oi = s->gen_next_op_idx; - int pi = s->gen_next_parm_idx; int prev = old_op->prev; int next = old_op - s->gen_op_buf; TCGOp *new_op; tcg_debug_assert(oi < OPC_BUF_SIZE); - tcg_debug_assert(pi + nargs <= OPPARAM_BUF_SIZE); s->gen_next_op_idx = oi + 1; - s->gen_next_parm_idx = pi + nargs; new_op = &s->gen_op_buf[oi]; *new_op = (TCGOp){ .opc = opc, - .args = pi, .prev = prev, .next = next }; @@ -1597,20 +1591,16 @@ TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *old_op, TCGOpcode opc, int nargs) { int oi = s->gen_next_op_idx; - int pi = s->gen_next_parm_idx; int prev = old_op - s->gen_op_buf; int next = old_op->next; TCGOp *new_op; tcg_debug_assert(oi < OPC_BUF_SIZE); - tcg_debug_assert(pi + nargs <= OPPARAM_BUF_SIZE); s->gen_next_op_idx = oi + 1; - s->gen_next_parm_idx = pi + nargs; new_op = &s->gen_op_buf[oi]; *new_op = (TCGOp){ .opc = opc, - .args = pi, .prev = prev, .next = next }; @@ -1666,7 +1656,7 @@ static void liveness_pass_1(TCGContext *s, uint8_t *temp_state) TCGArg arg; TCGOp * const op = &s->gen_op_buf[oi]; - TCGArg * const args = &s->gen_opparam_buf[op->args]; + TCGArg * const args = op->args; TCGOpcode opc = op->opc; const TCGOpDef *def = &tcg_op_defs[opc]; @@ -1904,7 +1894,7 @@ static bool liveness_pass_2(TCGContext *s, uint8_t *temp_state) for (oi = s->gen_op_buf[0].next; oi != 0; oi = oi_next) { TCGOp *op = &s->gen_op_buf[oi]; - TCGArg *args = &s->gen_opparam_buf[op->args]; + TCGArg *args = op->args; TCGOpcode opc = op->opc; const TCGOpDef *def = &tcg_op_defs[opc]; TCGLifeData arg_life = op->life; @@ -1947,7 +1937,7 @@ static bool liveness_pass_2(TCGContext *s, uint8_t *temp_state) ? INDEX_op_ld_i32 : INDEX_op_ld_i64); TCGOp *lop = tcg_op_insert_before(s, op, lopc, 3); - TCGArg *largs = &s->gen_opparam_buf[lop->args]; + TCGArg *largs = lop->args; largs[0] = dir; largs[1] = temp_idx(s, its->mem_base); @@ -2019,7 +2009,7 @@ static bool liveness_pass_2(TCGContext *s, uint8_t *temp_state) ? INDEX_op_st_i32 : INDEX_op_st_i64); TCGOp *sop = tcg_op_insert_after(s, op, sopc, 3); - TCGArg *sargs = &s->gen_opparam_buf[sop->args]; + TCGArg *sargs = sop->args; sargs[0] = dir; sargs[1] = temp_idx(s, its->mem_base); @@ -2851,7 +2841,7 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb) num_insns = -1; for (oi = s->gen_op_buf[0].next; oi != 0; oi = oi_next) { TCGOp * const op = &s->gen_op_buf[oi]; - TCGArg * const args = &s->gen_opparam_buf[op->args]; + TCGArg * const args = op->args; TCGOpcode opc = op->opc; const TCGOpDef *def = &tcg_op_defs[opc]; TCGLifeData arg_life = op->life;