From 747bd69d0f6d278923c50a3be6dd9b85e5dfd603 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 31 Mar 2023 21:30:31 -0700 Subject: [PATCH] tcg: Add insn_start_words to TCGContext This will enable replacement of TARGET_INSN_START_WORDS in tcg.c. Split out "tcg/insn-start-words.h" and use it in target/. Reviewed-by: Anton Johansson Signed-off-by: Richard Henderson --- accel/tcg/perf.c | 8 ++++++-- accel/tcg/translate-all.c | 20 +++++++++++++------- include/tcg/insn-start-words.h | 17 +++++++++++++++++ include/tcg/tcg-op.h | 8 ++++---- include/tcg/tcg-opc.h | 6 +++--- include/tcg/tcg.h | 9 ++------- target/i386/helper.c | 2 +- target/openrisc/sys_helper.c | 2 +- tcg/tcg.c | 16 +++++++++++----- 9 files changed, 58 insertions(+), 30 deletions(-) create mode 100644 include/tcg/insn-start-words.h diff --git a/accel/tcg/perf.c b/accel/tcg/perf.c index 65e35ea3b9..f5a1eda39f 100644 --- a/accel/tcg/perf.c +++ b/accel/tcg/perf.c @@ -311,7 +311,8 @@ void perf_report_code(uint64_t guest_pc, TranslationBlock *tb, const void *start) { struct debuginfo_query *q; - size_t insn; + size_t insn, start_words; + uint64_t *gen_insn_data; if (!perfmap && !jitdump) { return; @@ -325,9 +326,12 @@ void perf_report_code(uint64_t guest_pc, TranslationBlock *tb, debuginfo_lock(); /* Query debuginfo for each guest instruction. */ + gen_insn_data = tcg_ctx->gen_insn_data; + start_words = tcg_ctx->insn_start_words; + for (insn = 0; insn < tb->icount; insn++) { /* FIXME: This replicates the restore_state_to_opc() logic. */ - q[insn].address = tcg_ctx->gen_insn_data[insn][0]; + q[insn].address = gen_insn_data[insn * start_words + 0]; if (tb_cflags(tb) & CF_PCREL) { q[insn].address |= (guest_pc & TARGET_PAGE_MASK); } else { diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 5cea9acd5a..67b838e16b 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -64,6 +64,7 @@ #include "tb-context.h" #include "internal.h" #include "perf.h" +#include "tcg/insn-start-words.h" TBContext tb_ctx; @@ -127,22 +128,26 @@ static int64_t decode_sleb128(const uint8_t **pp) static int encode_search(TranslationBlock *tb, uint8_t *block) { uint8_t *highwater = tcg_ctx->code_gen_highwater; + uint64_t *insn_data = tcg_ctx->gen_insn_data; + uint16_t *insn_end_off = tcg_ctx->gen_insn_end_off; uint8_t *p = block; int i, j, n; for (i = 0, n = tb->icount; i < n; ++i) { - uint64_t prev; + uint64_t prev, curr; for (j = 0; j < TARGET_INSN_START_WORDS; ++j) { if (i == 0) { prev = (!(tb_cflags(tb) & CF_PCREL) && j == 0 ? tb->pc : 0); } else { - prev = tcg_ctx->gen_insn_data[i - 1][j]; + prev = insn_data[(i - 1) * TARGET_INSN_START_WORDS + j]; } - p = encode_sleb128(p, tcg_ctx->gen_insn_data[i][j] - prev); + curr = insn_data[i * TARGET_INSN_START_WORDS + j]; + p = encode_sleb128(p, curr - prev); } - prev = (i == 0 ? 0 : tcg_ctx->gen_insn_end_off[i - 1]); - p = encode_sleb128(p, tcg_ctx->gen_insn_end_off[i] - prev); + prev = (i == 0 ? 0 : insn_end_off[i - 1]); + curr = insn_end_off[i]; + p = encode_sleb128(p, curr - prev); /* Test for (pending) buffer overflow. The assumption is that any one row beginning below the high water mark cannot overrun @@ -358,6 +363,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, tcg_ctx->tlb_fast_offset = (int)offsetof(ArchCPU, neg.tlb.f) - (int)offsetof(ArchCPU, env); #endif + tcg_ctx->insn_start_words = TARGET_INSN_START_WORDS; tb_overflow: @@ -451,7 +457,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, fprintf(logfile, "OUT: [size=%d]\n", gen_code_size); fprintf(logfile, " -- guest addr 0x%016" PRIx64 " + tb prologue\n", - tcg_ctx->gen_insn_data[insn][0]); + tcg_ctx->gen_insn_data[insn * TARGET_INSN_START_WORDS]); chunk_start = tcg_ctx->gen_insn_end_off[insn]; disas(logfile, tb->tc.ptr, chunk_start); @@ -464,7 +470,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, size_t chunk_end = tcg_ctx->gen_insn_end_off[insn]; if (chunk_end > chunk_start) { fprintf(logfile, " -- guest addr 0x%016" PRIx64 "\n", - tcg_ctx->gen_insn_data[insn][0]); + tcg_ctx->gen_insn_data[insn * TARGET_INSN_START_WORDS]); disas(logfile, tb->tc.ptr + chunk_start, chunk_end - chunk_start); chunk_start = chunk_end; diff --git a/include/tcg/insn-start-words.h b/include/tcg/insn-start-words.h new file mode 100644 index 0000000000..50c18bd326 --- /dev/null +++ b/include/tcg/insn-start-words.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Define TARGET_INSN_START_WORDS + * Copyright (c) 2008 Fabrice Bellard + */ + +#ifndef TARGET_INSN_START_WORDS + +#include "cpu.h" + +#ifndef TARGET_INSN_START_EXTRA_WORDS +# define TARGET_INSN_START_WORDS 1 +#else +# define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS) +#endif + +#endif /* TARGET_INSN_START_WORDS */ diff --git a/include/tcg/tcg-op.h b/include/tcg/tcg-op.h index 47f1dce816..d63683c47b 100644 --- a/include/tcg/tcg-op.h +++ b/include/tcg/tcg-op.h @@ -22,20 +22,20 @@ # error #endif -#if TARGET_INSN_START_WORDS == 1 +#ifndef TARGET_INSN_START_EXTRA_WORDS static inline void tcg_gen_insn_start(target_ulong pc) { TCGOp *op = tcg_emit_op(INDEX_op_insn_start, 64 / TCG_TARGET_REG_BITS); tcg_set_insn_start_param(op, 0, pc); } -#elif TARGET_INSN_START_WORDS == 2 +#elif TARGET_INSN_START_EXTRA_WORDS == 1 static inline void tcg_gen_insn_start(target_ulong pc, target_ulong a1) { TCGOp *op = tcg_emit_op(INDEX_op_insn_start, 2 * 64 / TCG_TARGET_REG_BITS); tcg_set_insn_start_param(op, 0, pc); tcg_set_insn_start_param(op, 1, a1); } -#elif TARGET_INSN_START_WORDS == 3 +#elif TARGET_INSN_START_EXTRA_WORDS == 2 static inline void tcg_gen_insn_start(target_ulong pc, target_ulong a1, target_ulong a2) { @@ -45,7 +45,7 @@ static inline void tcg_gen_insn_start(target_ulong pc, target_ulong a1, tcg_set_insn_start_param(op, 2, a2); } #else -# error "Unhandled number of operands to insn_start" +#error Unhandled TARGET_INSN_START_EXTRA_WORDS value #endif #if TARGET_LONG_BITS == 32 diff --git a/include/tcg/tcg-opc.h b/include/tcg/tcg-opc.h index 21594c1590..acfa5ba753 100644 --- a/include/tcg/tcg-opc.h +++ b/include/tcg/tcg-opc.h @@ -188,9 +188,9 @@ DEF(mulsh_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_mulsh_i64)) #define DATA64_ARGS (TCG_TARGET_REG_BITS == 64 ? 1 : 2) -/* QEMU specific */ -DEF(insn_start, 0, 0, DATA64_ARGS * TARGET_INSN_START_WORDS, - TCG_OPF_NOT_PRESENT) +/* There are tcg_ctx->insn_start_words here, not just one. */ +DEF(insn_start, 0, 0, DATA64_ARGS, TCG_OPF_NOT_PRESENT) + DEF(exit_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END) DEF(goto_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END) DEF(goto_ptr, 0, 1, 0, TCG_OPF_BB_EXIT | TCG_OPF_BB_END) diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h index 7c1bbba673..813c733910 100644 --- a/include/tcg/tcg.h +++ b/include/tcg/tcg.h @@ -173,12 +173,6 @@ typedef uint64_t TCGRegSet; #define TCG_TARGET_HAS_v256 0 #endif -#ifndef TARGET_INSN_START_EXTRA_WORDS -# define TARGET_INSN_START_WORDS 1 -#else -# define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS) -#endif - typedef enum TCGOpcode { #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name, #include "tcg/tcg-opc.h" @@ -526,6 +520,7 @@ struct TCGContext { uint8_t page_bits; uint8_t tlb_dyn_max_bits; #endif + uint8_t insn_start_words; TCGRegSet reserved_regs; intptr_t current_frame_offset; @@ -597,7 +592,7 @@ struct TCGContext { TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS]; uint16_t gen_insn_end_off[TCG_MAX_INSNS]; - uint64_t gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS]; + uint64_t *gen_insn_data; /* Exit to translator on overflow. */ sigjmp_buf jmp_trans; diff --git a/target/i386/helper.c b/target/i386/helper.c index 682d10d98a..36bf2107e7 100644 --- a/target/i386/helper.c +++ b/target/i386/helper.c @@ -29,7 +29,7 @@ #endif #include "qemu/log.h" #ifdef CONFIG_TCG -#include "tcg/tcg.h" +#include "tcg/insn-start-words.h" #endif void cpu_sync_avx_hflag(CPUX86State *env) diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c index 110f157601..782a5751b7 100644 --- a/target/openrisc/sys_helper.c +++ b/target/openrisc/sys_helper.c @@ -26,7 +26,7 @@ #ifndef CONFIG_USER_ONLY #include "hw/boards.h" #endif -#include "tcg/tcg.h" +#include "tcg/insn-start-words.h" #define TO_SPR(group, number) (((group) << 11) + (number)) diff --git a/tcg/tcg.c b/tcg/tcg.c index d369367c5a..a339e3e3d8 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -1501,6 +1501,8 @@ void tcg_func_start(TCGContext *s) tcg_debug_assert(s->tlb_fast_offset < 0); tcg_debug_assert(s->tlb_fast_offset >= MIN_TLB_MASK_TABLE_OFS); #endif + + tcg_debug_assert(s->insn_start_words > 0); } static TCGTemp *tcg_temp_alloc(TCGContext *s) @@ -2445,7 +2447,7 @@ static void tcg_dump_ops(TCGContext *s, FILE *f, bool have_prefs) nb_oargs = 0; col += ne_fprintf(f, "\n ----"); - for (i = 0; i < TARGET_INSN_START_WORDS; ++i) { + for (i = 0, k = s->insn_start_words; i < k; ++i) { col += ne_fprintf(f, " %016" PRIx64, tcg_get_insn_start_param(op, i)); } @@ -6024,7 +6026,7 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start) #ifdef CONFIG_PROFILER TCGProfile *prof = &s->prof; #endif - int i, num_insns; + int i, start_words, num_insns; TCGOp *op; #ifdef CONFIG_PROFILER @@ -6147,6 +6149,10 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start) s->pool_labels = NULL; #endif + start_words = s->insn_start_words; + s->gen_insn_data = + tcg_malloc(sizeof(uint64_t) * s->gen_tb->icount * start_words); + num_insns = -1; QTAILQ_FOREACH(op, &s->ops, link) { TCGOpcode opc = op->opc; @@ -6172,8 +6178,8 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start) assert(s->gen_insn_end_off[num_insns] == off); } num_insns++; - for (i = 0; i < TARGET_INSN_START_WORDS; ++i) { - s->gen_insn_data[num_insns][i] = + for (i = 0; i < start_words; ++i) { + s->gen_insn_data[num_insns * start_words + i] = tcg_get_insn_start_param(op, i); } break; @@ -6219,7 +6225,7 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start) return -2; } } - tcg_debug_assert(num_insns >= 0); + tcg_debug_assert(num_insns + 1 == s->gen_tb->icount); s->gen_insn_end_off[num_insns] = tcg_current_code_size(s); /* Generate TB finalization at the end of block */