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| author | Richard Henderson <rth@twiddle.net> | 2016-11-16 14:03:28 +0100 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-01-10 08:06:11 -0800 |
| commit | 53c76c19904983d2c81e4f5e77027c241918a479 (patch) | |
| tree | 931737aff31dcdff7bf61b6ccf454a9f37ddc91b /tcg | |
| parent | d0b07481fabb4dc4ed05d56d09718758f5f7a136 (diff) | |
| download | qemu-53c76c19904983d2c81e4f5e77027c241918a479.tar.gz | |
tcg/aarch64: Handle ctz and clz opcodes
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/aarch64/tcg-target.h | 8 | ||||
| -rw-r--r-- | tcg/aarch64/tcg-target.inc.c | 48 |
2 files changed, 52 insertions, 4 deletions
diff --git a/tcg/aarch64/tcg-target.h b/tcg/aarch64/tcg-target.h index 976f493157..9d6b00fbba 100644 --- a/tcg/aarch64/tcg-target.h +++ b/tcg/aarch64/tcg-target.h @@ -62,8 +62,8 @@ typedef enum { #define TCG_TARGET_HAS_eqv_i32 1 #define TCG_TARGET_HAS_nand_i32 0 #define TCG_TARGET_HAS_nor_i32 0 -#define TCG_TARGET_HAS_clz_i32 0 -#define TCG_TARGET_HAS_ctz_i32 0 +#define TCG_TARGET_HAS_clz_i32 1 +#define TCG_TARGET_HAS_ctz_i32 1 #define TCG_TARGET_HAS_deposit_i32 1 #define TCG_TARGET_HAS_extract_i32 1 #define TCG_TARGET_HAS_sextract_i32 1 @@ -96,8 +96,8 @@ typedef enum { #define TCG_TARGET_HAS_eqv_i64 1 #define TCG_TARGET_HAS_nand_i64 0 #define TCG_TARGET_HAS_nor_i64 0 -#define TCG_TARGET_HAS_clz_i64 0 -#define TCG_TARGET_HAS_ctz_i64 0 +#define TCG_TARGET_HAS_clz_i64 1 +#define TCG_TARGET_HAS_ctz_i64 1 #define TCG_TARGET_HAS_deposit_i64 1 #define TCG_TARGET_HAS_extract_i64 1 #define TCG_TARGET_HAS_sextract_i64 1 diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c index 17c0b20d61..585b0d6234 100644 --- a/tcg/aarch64/tcg-target.inc.c +++ b/tcg/aarch64/tcg-target.inc.c @@ -339,8 +339,12 @@ typedef enum { /* Conditional select instructions. */ I3506_CSEL = 0x1a800000, I3506_CSINC = 0x1a800400, + I3506_CSINV = 0x5a800000, + I3506_CSNEG = 0x5a800400, /* Data-processing (1 source) instructions. */ + I3507_CLZ = 0x5ac01000, + I3507_RBIT = 0x5ac00000, I3507_REV16 = 0x5ac00400, I3507_REV32 = 0x5ac00800, I3507_REV64 = 0x5ac00c00, @@ -993,6 +997,37 @@ static inline void tcg_out_mb(TCGContext *s, TCGArg a0) tcg_out32(s, sync[a0 & TCG_MO_ALL]); } +static void tcg_out_cltz(TCGContext *s, TCGType ext, TCGReg d, + TCGReg a0, TCGArg b, bool const_b, bool is_ctz) +{ + TCGReg a1 = a0; + if (is_ctz) { + a1 = TCG_REG_TMP; + tcg_out_insn(s, 3507, RBIT, ext, a1, a0); + } + if (const_b && b == (ext ? 64 : 32)) { + tcg_out_insn(s, 3507, CLZ, ext, d, a1); + } else { + AArch64Insn sel = I3506_CSEL; + + tcg_out_cmp(s, ext, a0, 0, 1); + tcg_out_insn(s, 3507, CLZ, ext, TCG_REG_TMP, a1); + + if (const_b) { + if (b == -1) { + b = TCG_REG_XZR; + sel = I3506_CSINV; + } else if (b == 0) { + b = TCG_REG_XZR; + } else { + tcg_out_movi(s, ext, d, b); + b = d; + } + } + tcg_out_insn_3506(s, sel, ext, d, TCG_REG_TMP, b, TCG_COND_NE); + } +} + #ifdef CONFIG_SOFTMMU /* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, * TCGMemOpIdx oi, uintptr_t ra) @@ -1559,6 +1594,15 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, } break; + case INDEX_op_clz_i64: + case INDEX_op_clz_i32: + tcg_out_cltz(s, ext, a0, a1, a2, c2, false); + break; + case INDEX_op_ctz_i64: + case INDEX_op_ctz_i32: + tcg_out_cltz(s, ext, a0, a1, a2, c2, true); + break; + case INDEX_op_brcond_i32: a1 = (int32_t)a1; /* FALLTHRU */ @@ -1750,11 +1794,15 @@ static const TCGTargetOpDef aarch64_op_defs[] = { { INDEX_op_sar_i32, { "r", "r", "ri" } }, { INDEX_op_rotl_i32, { "r", "r", "ri" } }, { INDEX_op_rotr_i32, { "r", "r", "ri" } }, + { INDEX_op_clz_i32, { "r", "r", "rAL" } }, + { INDEX_op_ctz_i32, { "r", "r", "rAL" } }, { INDEX_op_shl_i64, { "r", "r", "ri" } }, { INDEX_op_shr_i64, { "r", "r", "ri" } }, { INDEX_op_sar_i64, { "r", "r", "ri" } }, { INDEX_op_rotl_i64, { "r", "r", "ri" } }, { INDEX_op_rotr_i64, { "r", "r", "ri" } }, + { INDEX_op_clz_i64, { "r", "r", "rAL" } }, + { INDEX_op_ctz_i64, { "r", "r", "rAL" } }, { INDEX_op_brcond_i32, { "r", "rA" } }, { INDEX_op_brcond_i64, { "r", "rA" } }, |