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| author | Jakub Jelinek <jakub@redhat.com> | 2023-09-06 17:29:17 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2023-09-06 17:29:17 +0200 |
| commit | b38deff6127778fed453bb647e32738ba5c78e33 (patch) | |
| tree | 0d74e8439d74d7acad7e9a34f7310cf37a8dbd87 | |
| parent | a9d6c7fbeb374365058ffe2b9815d2b4b7193d38 (diff) | |
| download | gcc-b38deff6127778fed453bb647e32738ba5c78e33.zip gcc-b38deff6127778fed453bb647e32738ba5c78e33.tar.gz gcc-b38deff6127778fed453bb647e32738ba5c78e33.tar.bz2 | |
i386: Enable _BitInt on x86-64 [PR102989]
The following patch enables _BitInt support on x86-64, the only
target which has _BitInt specified in psABI.
2023-09-06 Jakub Jelinek <jakub@redhat.com>
PR c/102989
* config/i386/i386.cc (classify_argument): Handle BITINT_TYPE.
(ix86_bitint_type_info): New function.
(TARGET_C_BITINT_TYPE_INFO): Redefine.
| -rw-r--r-- | gcc/config/i386/i386.cc | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc index 1bc3f11..1cef7ee 100644 --- a/gcc/config/i386/i386.cc +++ b/gcc/config/i386/i386.cc @@ -2121,7 +2121,8 @@ classify_argument (machine_mode mode, const_tree type, return 0; } - if (type && AGGREGATE_TYPE_P (type)) + if (type && (AGGREGATE_TYPE_P (type) + || (TREE_CODE (type) == BITINT_TYPE && words > 1))) { int i; tree field; @@ -2270,6 +2271,14 @@ classify_argument (machine_mode mode, const_tree type, } break; + case BITINT_TYPE: + /* _BitInt(N) for N > 64 is passed as structure containing + (N + 63) / 64 64-bit elements. */ + if (words > 2) + return 0; + classes[0] = classes[1] = X86_64_INTEGER_CLASS; + return 2; + default: gcc_unreachable (); } @@ -24843,6 +24852,25 @@ ix86_get_excess_precision (enum excess_precision_type type) return FLT_EVAL_METHOD_UNPREDICTABLE; } +/* Return true if _BitInt(N) is supported and fill its details into *INFO. */ +bool +ix86_bitint_type_info (int n, struct bitint_info *info) +{ + if (!TARGET_64BIT) + return false; + if (n <= 8) + info->limb_mode = QImode; + else if (n <= 16) + info->limb_mode = HImode; + else if (n <= 32) + info->limb_mode = SImode; + else + info->limb_mode = DImode; + info->big_endian = false; + info->extended = false; + return true; +} + /* Implement PUSH_ROUNDING. On 386, we have pushw instruction that decrements by exactly 2 no matter what the position was, there is no pushb. @@ -25447,6 +25475,8 @@ ix86_run_selftests (void) #undef TARGET_C_EXCESS_PRECISION #define TARGET_C_EXCESS_PRECISION ix86_get_excess_precision +#undef TARGET_C_BITINT_TYPE_INFO +#define TARGET_C_BITINT_TYPE_INFO ix86_bitint_type_info #undef TARGET_PROMOTE_PROTOTYPES #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true #undef TARGET_PUSH_ARGUMENT |