diff options
| -rw-r--r-- | tcg/arm/tcg-target.c | 41 | ||||
| -rw-r--r-- | tcg/arm/tcg-target.h | 5 |
2 files changed, 42 insertions, 4 deletions
diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c index dfcc8e6..09f11e1 100644 --- a/tcg/arm/tcg-target.c +++ b/tcg/arm/tcg-target.c @@ -145,9 +145,10 @@ static void patch_reloc(uint8_t *code_ptr, int type, } } -#define TCG_CT_CONST_ARM 0x100 -#define TCG_CT_CONST_INV 0x200 -#define TCG_CT_CONST_NEG 0x400 +#define TCG_CT_CONST_ARM 0x100 +#define TCG_CT_CONST_INV 0x200 +#define TCG_CT_CONST_NEG 0x400 +#define TCG_CT_CONST_ZERO 0x800 /* parse target specific constraints */ static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str) @@ -165,6 +166,9 @@ static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str) case 'N': /* The gcc constraint letter is L, already used here. */ ct->ct |= TCG_CT_CONST_NEG; break; + case 'Z': + ct->ct |= TCG_CT_CONST_ZERO; + break; case 'r': ct->ct |= TCG_CT_REG; @@ -297,6 +301,8 @@ static inline int tcg_target_const_match(tcg_target_long val, return 1; } else if ((ct & TCG_CT_CONST_NEG) && check_fit_imm(-val)) { return 1; + } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) { + return 1; } else { return 0; } @@ -702,6 +708,28 @@ static inline void tcg_out_bswap32(TCGContext *s, int cond, int rd, int rn) } } +bool tcg_target_deposit_valid(int ofs, int len) +{ + /* ??? Without bfi, we could improve over generic code by combining + the right-shift from a non-zero ofs with the orr. We do run into + problems when rd == rs, and the mask generated from ofs+len doesn't + fit into an immediate. We would have to be careful not to pessimize + wrt the optimizations performed on the expanded code. */ + return use_armv7_instructions; +} + +static inline void tcg_out_deposit(TCGContext *s, int cond, TCGReg rd, + TCGArg a1, int ofs, int len, bool const_a1) +{ + if (const_a1) { + /* bfi becomes bfc with rn == 15. */ + a1 = 15; + } + /* bfi/bfc */ + tcg_out32(s, 0x07c00010 | (cond << 28) | (rd << 12) | a1 + | (ofs << 7) | ((ofs + len - 1) << 16)); +} + static inline void tcg_out_ld32_12(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { @@ -1835,6 +1863,11 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_out_ext16u(s, COND_AL, args[0], args[1]); break; + case INDEX_op_deposit_i32: + tcg_out_deposit(s, COND_AL, args[0], args[2], + args[3], args[4], const_args[2]); + break; + default: tcg_abort(); } @@ -1919,6 +1952,8 @@ static const TCGTargetOpDef arm_op_defs[] = { { INDEX_op_ext16s_i32, { "r", "r" } }, { INDEX_op_ext16u_i32, { "r", "r" } }, + { INDEX_op_deposit_i32, { "r", "0", "rZ" } }, + { -1 }, }; diff --git a/tcg/arm/tcg-target.h b/tcg/arm/tcg-target.h index 354dd8a..209f585 100644 --- a/tcg/arm/tcg-target.h +++ b/tcg/arm/tcg-target.h @@ -71,10 +71,13 @@ typedef enum { #define TCG_TARGET_HAS_eqv_i32 0 #define TCG_TARGET_HAS_nand_i32 0 #define TCG_TARGET_HAS_nor_i32 0 -#define TCG_TARGET_HAS_deposit_i32 0 +#define TCG_TARGET_HAS_deposit_i32 1 #define TCG_TARGET_HAS_movcond_i32 1 #define TCG_TARGET_HAS_muls2_i32 1 +extern bool tcg_target_deposit_valid(int ofs, int len); +#define TCG_TARGET_deposit_i32_valid tcg_target_deposit_valid + enum { TCG_AREG0 = TCG_REG_R6, }; |