From 358b492392ad91d45a9714f7cd28fc1d83ffd8be Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 16 Oct 2020 15:27:46 -0700 Subject: [PATCH] tcg/i386: Split out target constraints to tcg-target-con-str.h This eliminates the target-specific function target_parse_constraint and folds it into the single caller, process_op_defs. Since this is done directly into the switch statement, duplicates are compilation errors rather than silently ignored at runtime. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- tcg/i386/tcg-target-con-str.h | 33 +++++++++++++++++ tcg/i386/tcg-target.c.inc | 69 ----------------------------------- tcg/i386/tcg-target.h | 1 + tcg/tcg.c | 33 ++++++++++++++--- 4 files changed, 62 insertions(+), 74 deletions(-) create mode 100644 tcg/i386/tcg-target-con-str.h diff --git a/tcg/i386/tcg-target-con-str.h b/tcg/i386/tcg-target-con-str.h new file mode 100644 index 0000000000..24e6bcb80d --- /dev/null +++ b/tcg/i386/tcg-target-con-str.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Define i386 target-specific operand constraints. + * Copyright (c) 2021 Linaro + * + */ + +/* + * Define constraint letters for register sets: + * REGS(letter, register_mask) + */ +REGS('a', 1u << TCG_REG_EAX) +REGS('b', 1u << TCG_REG_EBX) +REGS('c', 1u << TCG_REG_ECX) +REGS('d', 1u << TCG_REG_EDX) +REGS('S', 1u << TCG_REG_ESI) +REGS('D', 1u << TCG_REG_EDI) + +REGS('r', ALL_GENERAL_REGS) +REGS('x', ALL_VECTOR_REGS) +REGS('q', ALL_BYTEL_REGS) /* regs that can be used as a byte operand */ +REGS('Q', ALL_BYTEH_REGS) /* regs with a second byte (e.g. %ah) */ +REGS('L', ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS) /* qemu_ld/st */ +REGS('s', ALL_BYTEL_REGS & ~SOFTMMU_RESERVE_REGS) /* qemu_st8_i32 data */ + +/* + * Define constraint letters for constants: + * CONST(letter, TCG_CT_CONST_* bit set) + */ +CONST('e', TCG_CT_CONST_S32) +CONST('I', TCG_CT_CONST_I32) +CONST('W', TCG_CT_CONST_WSZ) +CONST('Z', TCG_CT_CONST_U32) diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index 4feb7e2aa1..d3cf97748a 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -209,75 +209,6 @@ static bool patch_reloc(tcg_insn_unit *code_ptr, int type, return true; } -/* parse target specific constraints */ -static const char *target_parse_constraint(TCGArgConstraint *ct, - const char *ct_str, TCGType type) -{ - switch(*ct_str++) { - case 'a': - tcg_regset_set_reg(ct->regs, TCG_REG_EAX); - break; - case 'b': - tcg_regset_set_reg(ct->regs, TCG_REG_EBX); - break; - case 'c': - tcg_regset_set_reg(ct->regs, TCG_REG_ECX); - break; - case 'd': - tcg_regset_set_reg(ct->regs, TCG_REG_EDX); - break; - case 'S': - tcg_regset_set_reg(ct->regs, TCG_REG_ESI); - break; - case 'D': - tcg_regset_set_reg(ct->regs, TCG_REG_EDI); - break; - case 'q': - /* A register that can be used as a byte operand. */ - ct->regs |= ALL_BYTEL_REGS; - break; - case 'Q': - /* A register with an addressable second byte (e.g. %ah). */ - ct->regs |= ALL_BYTEH_REGS; - break; - case 'r': - /* A general register. */ - ct->regs |= ALL_GENERAL_REGS; - break; - case 'W': - /* With TZCNT/LZCNT, we can have operand-size as an input. */ - ct->ct |= TCG_CT_CONST_WSZ; - break; - case 'x': - /* A vector register. */ - ct->regs |= ALL_VECTOR_REGS; - break; - - case 'L': - /* qemu_ld/st data+address constraint */ - ct->regs |= ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS; - break; - case 's': - /* qemu_st8_i32 data constraint */ - ct->regs |= ALL_BYTEL_REGS & ~SOFTMMU_RESERVE_REGS; - break; - - case 'e': - ct->ct |= TCG_CT_CONST_S32; - break; - case 'Z': - ct->ct |= TCG_CT_CONST_U32; - break; - case 'I': - ct->ct |= TCG_CT_CONST_I32; - break; - - default: - return NULL; - } - return ct_str; -} - /* test if a constant matches the constraint */ static inline int tcg_target_const_match(tcg_target_long val, TCGType type, const TCGArgConstraint *arg_ct) diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h index b693d3692d..77693e13ea 100644 --- a/tcg/i386/tcg-target.h +++ b/tcg/i386/tcg-target.h @@ -235,5 +235,6 @@ static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_rx, #define TCG_TARGET_NEED_LDST_LABELS #endif #define TCG_TARGET_NEED_POOL_LABELS +#define TCG_TARGET_CON_STR_H #endif diff --git a/tcg/tcg.c b/tcg/tcg.c index 9e1b0d73c7..8cfa28ed84 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -103,8 +103,10 @@ static void tcg_register_jit_int(const void *buf, size_t size, __attribute__((unused)); /* Forward declarations for functions declared and used in tcg-target.c.inc. */ +#ifndef TCG_TARGET_CON_STR_H static const char *target_parse_constraint(TCGArgConstraint *ct, const char *ct_str, TCGType type); +#endif static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg1, intptr_t arg2); static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg); @@ -2415,7 +2417,6 @@ static void process_op_defs(TCGContext *s) for (op = 0; op < NB_OPS; op++) { TCGOpDef *def = &tcg_op_defs[op]; const TCGTargetOpDef *tdefs; - TCGType type; int i, nb_args; if (def->flags & TCG_OPF_NOT_PRESENT) { @@ -2431,7 +2432,6 @@ static void process_op_defs(TCGContext *s) /* Missing TCGTargetOpDef entry. */ tcg_debug_assert(tdefs != NULL); - type = (def->flags & TCG_OPF_64BIT ? TCG_TYPE_I64 : TCG_TYPE_I32); for (i = 0; i < nb_args; i++) { const char *ct_str = tdefs->args_ct_str[i]; /* Incomplete TCGTargetOpDef entry. */ @@ -2463,11 +2463,34 @@ static void process_op_defs(TCGContext *s) def->args_ct[i].ct |= TCG_CT_CONST; ct_str++; break; + +#ifdef TCG_TARGET_CON_STR_H + /* Include all of the target-specific constraints. */ + +#undef CONST +#define CONST(CASE, MASK) \ + case CASE: def->args_ct[i].ct |= MASK; ct_str++; break; +#define REGS(CASE, MASK) \ + case CASE: def->args_ct[i].regs |= MASK; ct_str++; break; + +#include "tcg-target-con-str.h" + +#undef REGS +#undef CONST default: - ct_str = target_parse_constraint(&def->args_ct[i], - ct_str, type); /* Typo in TCGTargetOpDef constraint. */ - tcg_debug_assert(ct_str != NULL); + g_assert_not_reached(); +#else + default: + { + TCGType type = (def->flags & TCG_OPF_64BIT + ? TCG_TYPE_I64 : TCG_TYPE_I32); + ct_str = target_parse_constraint(&def->args_ct[i], + ct_str, type); + /* Typo in TCGTargetOpDef constraint. */ + tcg_debug_assert(ct_str != NULL); + } +#endif } } }