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tcg/arm: Implement field extraction opcodes

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Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-10-14 19:51:45 -05:00
parent 40b2ccb156
commit ec903af184
2 changed files with 26 additions and 2 deletions
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4
tcg/arm/tcg-target.h
View file

@ -111,8 +111,8 @@ extern bool use_idiv_instructions;
#define TCG_TARGET_HAS_nand_i32 0
#define TCG_TARGET_HAS_nor_i32 0
#define TCG_TARGET_HAS_deposit_i32 use_armv7_instructions
#define TCG_TARGET_HAS_extract_i32 0
#define TCG_TARGET_HAS_sextract_i32 0
#define TCG_TARGET_HAS_extract_i32 use_armv7_instructions
#define TCG_TARGET_HAS_sextract_i32 use_armv7_instructions
#define TCG_TARGET_HAS_movcond_i32 1
#define TCG_TARGET_HAS_mulu2_i32 1
#define TCG_TARGET_HAS_muls2_i32 1

24
tcg/arm/tcg-target.inc.c
View file

@ -713,6 +713,22 @@ static inline void tcg_out_deposit(TCGContext *s, int cond, TCGReg rd,
| (ofs << 7) | ((ofs + len - 1) << 16));
}
static inline void tcg_out_extract(TCGContext *s, int cond, TCGReg rd,
TCGArg a1, int ofs, int len)
{
/* ubfx */
tcg_out32(s, 0x07e00050 | (cond << 28) | (rd << 12) | a1
| (ofs << 7) | ((len - 1) << 16));
}
static inline void tcg_out_sextract(TCGContext *s, int cond, TCGReg rd,
TCGArg a1, int ofs, int len)
{
/* sbfx */
tcg_out32(s, 0x07a00050 | (cond << 28) | (rd << 12) | a1
| (ofs << 7) | ((len - 1) << 16));
}
/* Note that this routine is used for both LDR and LDRH formats, so we do
not wish to include an immediate shift at this point. */
static void tcg_out_memop_r(TCGContext *s, int cond, ARMInsn opc, TCGReg rt,
@ -1894,6 +1910,12 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
tcg_out_deposit(s, COND_AL, args[0], args[2],
args[3], args[4], const_args[2]);
break;
case INDEX_op_extract_i32:
tcg_out_extract(s, COND_AL, args[0], args[1], args[2], args[3]);
break;
case INDEX_op_sextract_i32:
tcg_out_sextract(s, COND_AL, args[0], args[1], args[2], args[3]);
break;
case INDEX_op_div_i32:
tcg_out_sdiv(s, COND_AL, args[0], args[1], args[2]);
@ -1976,6 +1998,8 @@ static const TCGTargetOpDef arm_op_defs[] = {
{ INDEX_op_ext16u_i32, { "r", "r" } },
{ INDEX_op_deposit_i32, { "r", "0", "rZ" } },
{ INDEX_op_extract_i32, { "r", "r" } },
{ INDEX_op_sextract_i32, { "r", "r" } },
{ INDEX_op_div_i32, { "r", "r", "r" } },
{ INDEX_op_divu_i32, { "r", "r", "r" } },