On Thu, 2021-06-17 at 10:19 -0500, Bill Schmidt via Gcc-patches wrote:
> 2021-03-24 Bill Schmidt <[email protected]>
>
> gcc/
> * config/rs6000/rs6000-call.c (new_htm_spr_num): New function.
> (new_htm_expand_builtin): Implement.
> (rs6000_expand_new_builtin): Handle 32-bit and endian cases.
> ---
> gcc/config/rs6000/rs6000-call.c | 202 ++++++++++++++++++++++++++++++++
> 1 file changed, 202 insertions(+)
>
> diff --git a/gcc/config/rs6000/rs6000-call.c b/gcc/config/rs6000/rs6000-call.c
> index e1b685fb874..6b60f0852ef 100644
> --- a/gcc/config/rs6000/rs6000-call.c
> +++ b/gcc/config/rs6000/rs6000-call.c
> @@ -15068,11 +15068,171 @@ new_mma_expand_builtin (tree exp, rtx target,
> insn_code icode,
> return target;
> }
>
> +/* Return the appropriate SPR number associated with the given builtin. */
> +static inline HOST_WIDE_INT
> +new_htm_spr_num (enum rs6000_gen_builtins code)
> +{
> + if (code == RS6000_BIF_GET_TFHAR
> + || code == RS6000_BIF_SET_TFHAR)
> + return TFHAR_SPR;
> + else if (code == RS6000_BIF_GET_TFIAR
> + || code == RS6000_BIF_SET_TFIAR)
> + return TFIAR_SPR;
> + else if (code == RS6000_BIF_GET_TEXASR
> + || code == RS6000_BIF_SET_TEXASR)
> + return TEXASR_SPR;
> + gcc_assert (code == RS6000_BIF_GET_TEXASRU
> + || code == RS6000_BIF_SET_TEXASRU);
> + return TEXASRU_SPR;
> +}
Ok,
> +
> /* Expand the HTM builtin in EXP and store the result in TARGET. */
> static rtx
> new_htm_expand_builtin (bifdata *bifaddr, rs6000_gen_builtins fcode,
> tree exp, rtx target)
> {
> + tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0);
> + bool nonvoid = TREE_TYPE (TREE_TYPE (fndecl)) != void_type_node;
> +
> + if (!TARGET_POWERPC64
> + && (fcode == RS6000_BIF_TABORTDC
> + || fcode == RS6000_BIF_TABORTDCI))
> + {
> + error ("builtin %qs is only valid in 64-bit mode", bifaddr->bifname);
> + return const0_rtx;
> + }
ok
> +
> + rtx op[MAX_HTM_OPERANDS], pat;
> + int nopnds = 0;
> + tree arg;
> + call_expr_arg_iterator iter;
> + insn_code icode = bifaddr->icode;
> + bool uses_spr = bif_is_htmspr (*bifaddr);
> + rtx cr = NULL_RTX;
> +
> + if (uses_spr)
> + icode = rs6000_htm_spr_icode (nonvoid);
> + const insn_operand_data *insn_op = &insn_data[icode].operand[0];
> +
> + if (nonvoid)
> + {
> + machine_mode tmode = (uses_spr) ? insn_op->mode : E_SImode;
> + if (!target
> + || GET_MODE (target) != tmode
> + || (uses_spr && !(*insn_op->predicate) (target, tmode)))
> + target = gen_reg_rtx (tmode);
> + if (uses_spr)
> + op[nopnds++] = target;
> + }
> +
> + FOR_EACH_CALL_EXPR_ARG (arg, iter, exp)
> + {
> + if (arg == error_mark_node || nopnds >= MAX_HTM_OPERANDS)
> + return const0_rtx;
> +
> + insn_op = &insn_data[icode].operand[nopnds];
> + op[nopnds] = expand_normal (arg);
> +
> + if (!(*insn_op->predicate) (op[nopnds], insn_op->mode))
> + {
> + if (!strcmp (insn_op->constraint, "n"))
> + {
> + int arg_num = (nonvoid) ? nopnds : nopnds + 1;
> + if (!CONST_INT_P (op[nopnds]))
> + error ("argument %d must be an unsigned literal", arg_num);
> + else
> + error ("argument %d is an unsigned literal that is "
> + "out of range", arg_num);
> + return const0_rtx;
> + }
> + op[nopnds] = copy_to_mode_reg (insn_op->mode, op[nopnds]);
> + }
> +
> + nopnds++;
> + }
> +
> + /* Handle the builtins for extended mnemonics. These accept
> + no arguments, but map to builtins that take arguments. */
> + switch (fcode)
> + {
> + case RS6000_BIF_TENDALL: /* Alias for: tend. 1 */
> + case RS6000_BIF_TRESUME: /* Alias for: tsr. 1 */
> + op[nopnds++] = GEN_INT (1);
> + break;
> + case RS6000_BIF_TSUSPEND: /* Alias for: tsr. 0 */
> + op[nopnds++] = GEN_INT (0);
> + break;
> + default:
> + break;
> + }
ok
> +
> + /* If this builtin accesses SPRs, then pass in the appropriate
> + SPR number and SPR regno as the last two operands. */
> + if (uses_spr)
> + {
> + machine_mode mode = (TARGET_POWERPC64) ? DImode : SImode;
> + op[nopnds++] = gen_rtx_CONST_INT (mode, new_htm_spr_num (fcode));
> + }
> + /* If this builtin accesses a CR, then pass in a scratch
> + CR as the last operand. */
> + else if (bif_is_htmcr (*bifaddr))
Given this is an if/else, presumably there are no builtins that use
both a SPR and access a CR ?
> + {
> + cr = gen_reg_rtx (CCmode);
> + op[nopnds++] = cr;
> + }
> +
> + switch (nopnds)
> + {
> + case 1:
> + pat = GEN_FCN (icode) (op[0]);
> + break;
> + case 2:
> + pat = GEN_FCN (icode) (op[0], op[1]);
> + break;
> + case 3:
> + pat = GEN_FCN (icode) (op[0], op[1], op[2]);
> + break;
> + case 4:
> + pat = GEN_FCN (icode) (op[0], op[1], op[2], op[3]);
> + break;
> + default:
> + gcc_unreachable ();
> + }
> + if (!pat)
> + return NULL_RTX;
> + emit_insn (pat);
ok
> +
> + if (bif_is_htmcr (*bifaddr))
> + {
> + if (fcode == RS6000_BIF_TBEGIN)
> + {
> + /* Emit code to set TARGET to true or false depending on
> + whether the tbegin. instruction successfully or failed
> + to start a transaction. We do this by placing the 1's
> + complement of CR's EQ bit into TARGET. */
s/successfully/succeeded/ ?
> + rtx scratch = gen_reg_rtx (SImode);
> + emit_insn (gen_rtx_SET (scratch,
> + gen_rtx_EQ (SImode, cr,
> + const0_rtx)));
> + emit_insn (gen_rtx_SET (target,
> + gen_rtx_XOR (SImode, scratch,
> + GEN_INT (1))));
> + }
> + else
> + {
> + /* Emit code to copy the 4-bit condition register field
> + CR into the least significant end of register TARGET. */
> + rtx scratch1 = gen_reg_rtx (SImode);
> + rtx scratch2 = gen_reg_rtx (SImode);
> + rtx subreg = simplify_gen_subreg (CCmode, scratch1, SImode, 0);
> + emit_insn (gen_movcc (subreg, cr));
> + emit_insn (gen_lshrsi3 (scratch2, scratch1, GEN_INT (28)));
> + emit_insn (gen_andsi3 (target, scratch2, GEN_INT (0xf)));
> + }
> + }
> +
> + if (nonvoid)
> + return target;
ok
> return const0_rtx;
> }
>
> @@ -15316,6 +15476,48 @@ rs6000_expand_new_builtin (tree exp, rtx target,
> if (bif_is_htm (*bifaddr))
> return new_htm_expand_builtin (bifaddr, fcode, exp, target);
>
> + if (bif_is_32bit (*bifaddr) && TARGET_32BIT)
> + {
> + if (fcode == RS6000_BIF_MFTB)
> + icode = CODE_FOR_rs6000_mftb_si;
> + else
> + gcc_unreachable ();
> + }
ok
> +
> + if (bif_is_endian (*bifaddr) && BYTES_BIG_ENDIAN)
> + {
> + if (fcode == RS6000_BIF_LD_ELEMREV_V1TI)
> + icode = CODE_FOR_vsx_load_v1ti;
> + else if (fcode == RS6000_BIF_LD_ELEMREV_V2DF)
> + icode = CODE_FOR_vsx_load_v2df;
> + else if (fcode == RS6000_BIF_LD_ELEMREV_V2DI)
> + icode = CODE_FOR_vsx_load_v2di;
> + else if (fcode == RS6000_BIF_LD_ELEMREV_V4SF)
> + icode = CODE_FOR_vsx_load_v4sf;
> + else if (fcode == RS6000_BIF_LD_ELEMREV_V4SI)
> + icode = CODE_FOR_vsx_load_v4si;
> + else if (fcode == RS6000_BIF_LD_ELEMREV_V8HI)
> + icode = CODE_FOR_vsx_load_v8hi;
> + else if (fcode == RS6000_BIF_LD_ELEMREV_V16QI)
> + icode = CODE_FOR_vsx_load_v16qi;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V1TI)
> + icode = CODE_FOR_vsx_store_v1ti;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V2DF)
> + icode = CODE_FOR_vsx_store_v2df;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V2DI)
> + icode = CODE_FOR_vsx_store_v2di;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V4SF)
> + icode = CODE_FOR_vsx_store_v4sf;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V4SI)
> + icode = CODE_FOR_vsx_store_v4si;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V8HI)
> + icode = CODE_FOR_vsx_store_v8hi;
> + else if (fcode == RS6000_BIF_ST_ELEMREV_V16QI)
> + icode = CODE_FOR_vsx_store_v16qi;
> + else
> + gcc_unreachable ();
ok
lgtm,
thanks
-Will
> + }
> +
> rtx pat;
> const int MAX_BUILTIN_ARGS = 6;
> tree arg[MAX_BUILTIN_ARGS];
