From: Richard Sandiford Date: Tue, 5 Sep 2017 19:57:28 +0000 (+0000) Subject: Add mode_for_int_vector helper functions X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ddc203a7b15306287792a3eed6abfe306e3d26ad;p=gcc.git Add mode_for_int_vector helper functions There are at least a few places that want to create an integer vector with a specified element size and element count, or to create the integer equivalent of an existing mode. This patch adds helpers for doing that. The require ()s are all used in functions that go on to emit instructions that use the result as a vector mode. 2017-09-05 Richard Sandiford gcc/ * machmode.h (mode_for_int_vector): New function. * stor-layout.c (mode_for_int_vector): Likewise. * config/aarch64/aarch64.c (aarch64_emit_approx_sqrt): Use it. * config/powerpcspe/powerpcspe.c (rs6000_do_expand_vec_perm): Likewise. * config/rs6000/rs6000.c (rs6000_do_expand_vec_perm): Likewise. * config/s390/s390.c (s390_expand_vec_compare_cc): Likewise. (s390_expand_vcond): Likewise. From-SVN: r251729 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4a7f676a143..03f690fecf4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,13 @@ +2017-09-05 Richard Sandiford + + * machmode.h (mode_for_int_vector): New function. + * stor-layout.c (mode_for_int_vector): Likewise. + * config/aarch64/aarch64.c (aarch64_emit_approx_sqrt): Use it. + * config/powerpcspe/powerpcspe.c (rs6000_do_expand_vec_perm): Likewise. + * config/rs6000/rs6000.c (rs6000_do_expand_vec_perm): Likewise. + * config/s390/s390.c (s390_expand_vec_compare_cc): Likewise. + (s390_expand_vcond): Likewise. + 2017-09-05 Richard Sandiford * machmode.h (opt_machine_mode): New type. diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index d766307e650..2a5a075e62b 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -8282,9 +8282,6 @@ aarch64_emit_approx_sqrt (rtx dst, rtx src, bool recp) return false; } - machine_mode mmsk - = mode_for_vector (int_mode_for_mode (GET_MODE_INNER (mode)).require (), - GET_MODE_NUNITS (mode)); if (!recp) { if (!(flag_mlow_precision_sqrt @@ -8302,7 +8299,7 @@ aarch64_emit_approx_sqrt (rtx dst, rtx src, bool recp) /* Caller assumes we cannot fail. */ gcc_assert (use_rsqrt_p (mode)); - + machine_mode mmsk = mode_for_int_vector (mode).require (); rtx xmsk = gen_reg_rtx (mmsk); if (!recp) /* When calculating the approximate square root, compare the diff --git a/gcc/config/powerpcspe/powerpcspe.c b/gcc/config/powerpcspe/powerpcspe.c index 9fd2d86abbf..82c36dee678 100644 --- a/gcc/config/powerpcspe/powerpcspe.c +++ b/gcc/config/powerpcspe/powerpcspe.c @@ -38739,8 +38739,7 @@ rs6000_do_expand_vec_perm (rtx target, rtx op0, rtx op1, imode = vmode; if (GET_MODE_CLASS (vmode) != MODE_VECTOR_INT) - imode = mode_for_vector - (int_mode_for_mode (GET_MODE_INNER (vmode)).require (), nelt); + imode = mode_for_int_vector (vmode).require (); x = gen_rtx_CONST_VECTOR (imode, gen_rtvec_v (nelt, perm)); x = expand_vec_perm (vmode, op0, op1, x, target); diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 1a934ec4dab..5f3d36133b4 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -35584,8 +35584,7 @@ rs6000_do_expand_vec_perm (rtx target, rtx op0, rtx op1, imode = vmode; if (GET_MODE_CLASS (vmode) != MODE_VECTOR_INT) - imode = mode_for_vector - (int_mode_for_mode (GET_MODE_INNER (vmode)).require (), nelt); + imode = mode_for_int_vector (vmode).require (); x = gen_rtx_CONST_VECTOR (imode, gen_rtvec_v (nelt, perm)); x = expand_vec_perm (vmode, op0, op1, x, target); diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index 3fd1ff618d9..36bc67db1da 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -6472,10 +6472,7 @@ s390_expand_vec_compare_cc (rtx target, enum rtx_code code, case LE: cc_producer_mode = CCVFHEmode; code = GE; swap_p = true; break; default: gcc_unreachable (); } - scratch_mode = mode_for_vector - (int_mode_for_mode (GET_MODE_INNER (GET_MODE (cmp1))).require (), - GET_MODE_NUNITS (GET_MODE (cmp1))); - gcc_assert (scratch_mode != BLKmode); + scratch_mode = mode_for_int_vector (GET_MODE (cmp1)).require (); if (inv_p) all_p = !all_p; @@ -6581,9 +6578,7 @@ s390_expand_vcond (rtx target, rtx then, rtx els, /* We always use an integral type vector to hold the comparison result. */ - result_mode = mode_for_vector - (int_mode_for_mode (GET_MODE_INNER (cmp_mode)).require (), - GET_MODE_NUNITS (cmp_mode)); + result_mode = mode_for_int_vector (cmp_mode).require (); result_target = gen_reg_rtx (result_mode); /* We allow vector immediates as comparison operands that diff --git a/gcc/machmode.h b/gcc/machmode.h index 956e2c086f1..7dd71e90d3d 100644 --- a/gcc/machmode.h +++ b/gcc/machmode.h @@ -706,6 +706,21 @@ extern machine_mode bitwise_mode_for_mode (machine_mode); extern machine_mode mode_for_vector (scalar_mode, unsigned); +extern opt_machine_mode mode_for_int_vector (unsigned int, unsigned int); + +/* Return the integer vector equivalent of MODE, if one exists. In other + words, return the mode for an integer vector that has the same number + of bits as MODE and the same number of elements as MODE, with the + latter being 1 if MODE is scalar. The returned mode can be either + an integer mode or a vector mode. */ + +inline opt_machine_mode +mode_for_int_vector (machine_mode mode) +{ + return mode_for_int_vector (GET_MODE_UNIT_BITSIZE (mode), + GET_MODE_NUNITS (mode)); +} + /* A class for iterating through possible bitfield modes. */ class bit_field_mode_iterator { diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index f9a28e7c849..6bb7b246c25 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -517,6 +517,23 @@ mode_for_vector (scalar_mode innermode, unsigned nunits) return mode; } +/* Return the mode for a vector that has NUNITS integer elements of + INT_BITS bits each, if such a mode exists. The mode can be either + an integer mode or a vector mode. */ + +opt_machine_mode +mode_for_int_vector (unsigned int int_bits, unsigned int nunits) +{ + scalar_int_mode int_mode; + if (int_mode_for_size (int_bits, 0).exists (&int_mode)) + { + machine_mode vec_mode = mode_for_vector (int_mode, nunits); + if (vec_mode != BLKmode) + return vec_mode; + } + return opt_machine_mode (); +} + /* Return the alignment of MODE. This will be bounded by 1 and BIGGEST_ALIGNMENT. */