Re: [Qemu-devel] Re: [PATCH 2/2] tcg-sparc: Implement setcond, setcond2.

[Blue Swirl <blauwirbel@gmail.com>]

Thanks, applied. Please remember the Signed-off-by: line.


On Mon, Feb 15, 2010 at 11:22 PM, Richard Henderson <rth@twiddle.net> wrote:
> On 02/13/2010 02:01 PM, Blue Swirl wrote:
>> On Tue, Feb 9, 2010 at 11:37 PM, Richard Henderson <rth@twiddle.net> wrote:
>>> ---
>>>  tcg/sparc/tcg-target.c |  126 ++++++++++++++++++++++++++++++++++++++++++++++++
>>>  1 files changed, 126 insertions(+), 0 deletions(-)
>>
>> Something's wrong with the patch...
>
> Oops.  The tree wasn't properly committed when I
> extracted the patch.  Here's that last again.
>
>
> r~
> ---
> commit 8f76ac8882ff2b0d9db402352b9cf632cc92f84f
> Author: Richard Henderson <rth@twiddle.net>
> Date:   Mon Feb 15 13:19:49 2010 -0800
>
>    tcg-sparc: Implement setcond, setcond2.
>
> diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
> index dd7a598..5b4347a 100644
> --- a/tcg/sparc/tcg-target.c
> +++ b/tcg/sparc/tcg-target.c
> @@ -194,6 +194,7 @@ static inline int tcg_target_const_match(tcg_target_long val,
>  #define INSN_RS2(x) (x)
>  #define INSN_ASI(x) ((x) << 5)
>
> +#define INSN_IMM11(x) ((1 << 13) | ((x) & 0x7ff))
>  #define INSN_IMM13(x) ((1 << 13) | ((x) & 0x1fff))
>  #define INSN_OFF19(x) (((x) >> 2) & 0x07ffff)
>  #define INSN_OFF22(x) (((x) >> 2) & 0x3fffff)
> @@ -217,6 +218,9 @@ static inline int tcg_target_const_match(tcg_target_long val,
>  #define COND_VC    0xf
>  #define BA         (INSN_OP(0) | INSN_COND(COND_A, 0) | INSN_OP2(0x2))
>
> +#define MOVCC_ICC  (1 << 18)
> +#define MOVCC_XCC  (1 << 18 | 1 << 12)
> +
>  #define ARITH_ADD  (INSN_OP(2) | INSN_OP3(0x00))
>  #define ARITH_ADDCC (INSN_OP(2) | INSN_OP3(0x10))
>  #define ARITH_AND  (INSN_OP(2) | INSN_OP3(0x01))
> @@ -233,6 +237,7 @@ static inline int tcg_target_const_match(tcg_target_long val,
>  #define ARITH_MULX (INSN_OP(2) | INSN_OP3(0x09))
>  #define ARITH_UDIVX (INSN_OP(2) | INSN_OP3(0x0d))
>  #define ARITH_SDIVX (INSN_OP(2) | INSN_OP3(0x2d))
> +#define ARITH_MOVCC (INSN_OP(2) | INSN_OP3(0x2c))
>
>  #define SHIFT_SLL  (INSN_OP(2) | INSN_OP3(0x25))
>  #define SHIFT_SRL  (INSN_OP(2) | INSN_OP3(0x26))
> @@ -580,6 +585,109 @@ static void tcg_out_brcond2_i32(TCGContext *s, int cond,
>  }
>  #endif
>
> +static void tcg_out_setcond_i32(TCGContext *s, int cond, TCGArg ret,
> +                                TCGArg c1, TCGArg c2, int c2const)
> +{
> +    TCGArg t;
> +
> +    /* For 32-bit comparisons, we can play games with ADDX/SUBX.  */
> +    switch (cond) {
> +    case TCG_COND_EQ:
> +    case TCG_COND_NE:
> +        if (c2 != 0) {
> +            tcg_out_arithc(s, ret, c1, c2, c2const, ARITH_XOR);
> +        }
> +        c1 = TCG_REG_G0, c2 = ret, c2const = 0;
> +        cond = (cond == TCG_COND_EQ ? TCG_COND_LEU : TCG_COND_LTU);
> +       break;
> +
> +    case TCG_COND_GTU:
> +    case TCG_COND_GEU:
> +        if (c2const && c2 != 0) {
> +            tcg_out_movi_imm13(s, TCG_REG_I5, c2);
> +            c2 = TCG_REG_I5;
> +        }
> +        t = c1, c1 = c2, c2 = t, c2const = 0;
> +        cond = tcg_swap_cond(cond);
> +        break;
> +
> +    case TCG_COND_LTU:
> +    case TCG_COND_LEU:
> +        break;
> +
> +    default:
> +        tcg_out_cmp(s, c1, c2, c2const);
> +#if defined(__sparc_v9__) || defined(__sparc_v8plus__)
> +        tcg_out_movi_imm13(s, ret, 0);
> +        tcg_out32 (s, ARITH_MOVCC | INSN_RD(ret)
> +                   | INSN_RS1(tcg_cond_to_bcond[cond])
> +                   | MOVCC_ICC | INSN_IMM11(1));
> +#else
> +        t = gen_new_label();
> +        tcg_out_branch_i32(s, INSN_COND(tcg_cond_to_bcond[cond], 1), t);
> +        tcg_out_movi_imm13(s, ret, 1);
> +        tcg_out_movi_imm13(s, ret, 0);
> +        tcg_out_label(s, t, (tcg_target_long)s->code_ptr);
> +#endif
> +        return;
> +    }
> +
> +    tcg_out_cmp(s, c1, c2, c2const);
> +    if (cond == TCG_COND_LTU) {
> +        tcg_out_arithi(s, ret, TCG_REG_G0, 0, ARITH_ADDX);
> +    } else {
> +        tcg_out_arithi(s, ret, TCG_REG_G0, -1, ARITH_SUBX);
> +    }
> +}
> +
> +#if TCG_TARGET_REG_BITS == 64
> +static void tcg_out_setcond_i64(TCGContext *s, int cond, TCGArg ret,
> +                                TCGArg c1, TCGArg c2, int c2const)
> +{
> +    tcg_out_cmp(s, c1, c2, c2const);
> +    tcg_out_movi_imm13(s, ret, 0);
> +    tcg_out32 (s, ARITH_MOVCC | INSN_RD(ret)
> +               | INSN_RS1(tcg_cond_to_bcond[cond])
> +               | MOVCC_XCC | INSN_IMM11(1));
> +}
> +#else
> +static void tcg_out_setcond2_i32(TCGContext *s, int cond, TCGArg ret,
> +                                 TCGArg al, TCGArg ah,
> +                                 TCGArg bl, int blconst,
> +                                 TCGArg bh, int bhconst)
> +{
> +    int lab;
> +
> +    switch (cond) {
> +    case TCG_COND_EQ:
> +        tcg_out_setcond_i32(s, TCG_COND_EQ, TCG_REG_I5, al, bl, blconst);
> +        tcg_out_setcond_i32(s, TCG_COND_EQ, ret, ah, bh, bhconst);
> +        tcg_out_arith(s, ret, ret, TCG_REG_I5, ARITH_AND);
> +        break;
> +
> +    case TCG_COND_NE:
> +        tcg_out_setcond_i32(s, TCG_COND_NE, TCG_REG_I5, al, al, blconst);
> +        tcg_out_setcond_i32(s, TCG_COND_NE, ret, ah, bh, bhconst);
> +        tcg_out_arith(s, ret, ret, TCG_REG_I5, ARITH_OR);
> +        break;
> +
> +    default:
> +        lab = gen_new_label();
> +
> +        tcg_out_cmp(s, ah, bh, bhconst);
> +        tcg_out_branch_i32(s, INSN_COND(tcg_cond_to_bcond[cond], 1), lab);
> +        tcg_out_movi_imm13(s, ret, 1);
> +        tcg_out_branch_i32(s, INSN_COND(COND_NE, 1), lab);
> +        tcg_out_movi_imm13(s, ret, 0);
> +
> +        tcg_out_setcond_i32(s, tcg_unsigned_cond(cond), ret, al, bl, blconst);
> +
> +        tcg_out_label(s, lab, (tcg_target_long)s->code_ptr);
> +        break;
> +    }
> +}
> +#endif
> +
>  /* Generate global QEMU prologue and epilogue code */
>  void tcg_target_qemu_prologue(TCGContext *s)
>  {
> @@ -1146,12 +1254,22 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
>         tcg_out_brcond_i32(s, args[2], args[0], args[1], const_args[1],
>                            args[3]);
>         break;
> +    case INDEX_op_setcond_i32:
> +        tcg_out_setcond_i32(s, args[3], args[0], args[1],
> +                            args[2], const_args[2]);
> +        break;
> +
>  #if TCG_TARGET_REG_BITS == 32
>     case INDEX_op_brcond2_i32:
>         tcg_out_brcond2_i32(s, args[4], args[0], args[1],
>                             args[2], const_args[2],
>                             args[3], const_args[3], args[5]);
>         break;
> +    case INDEX_op_setcond2_i32:
> +        tcg_out_setcond2_i32(s, args[5], args[0], args[1], args[2],
> +                             args[3], const_args[3],
> +                             args[4], const_args[4]);
> +        break;
>     case INDEX_op_add2_i32:
>         tcg_out_arithc(s, args[0], args[2], args[4], const_args[4],
>                        ARITH_ADDCC);
> @@ -1257,6 +1375,11 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
>         tcg_out_brcond_i64(s, args[2], args[0], args[1], const_args[1],
>                            args[3]);
>         break;
> +    case INDEX_op_setcond_i64:
> +        tcg_out_setcond_i64(s, args[3], args[0], args[1],
> +                            args[2], const_args[2]);
> +        break;
> +
>     case INDEX_op_qemu_ld64:
>         tcg_out_qemu_ld(s, args, 3);
>         break;
> @@ -1309,8 +1432,11 @@ static const TCGTargetOpDef sparc_op_defs[] = {
>     { INDEX_op_sar_i32, { "r", "r", "rJ" } },
>
>     { INDEX_op_brcond_i32, { "r", "rJ" } },
> +    { INDEX_op_setcond_i32, { "r", "r", "rJ" } },
> +
>  #if TCG_TARGET_REG_BITS == 32
>     { INDEX_op_brcond2_i32, { "r", "r", "rJ", "rJ" } },
> +    { INDEX_op_setcond2_i32, { "r", "r", "r", "rJ", "rJ" } },
>     { INDEX_op_add2_i32, { "r", "r", "r", "r", "rJ", "rJ" } },
>     { INDEX_op_sub2_i32, { "r", "r", "r", "r", "rJ", "rJ" } },
>     { INDEX_op_mulu2_i32, { "r", "r", "r", "rJ" } },
> @@ -1362,6 +1488,7 @@ static const TCGTargetOpDef sparc_op_defs[] = {
>     { INDEX_op_ext32u_i64, { "r", "ri" } },
>
>     { INDEX_op_brcond_i64, { "r", "rJ" } },
> +    { INDEX_op_setcond_i64, { "r", "r", "rJ" } },
>  #endif
>     { -1 },
>  };
>