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| author | Alan Lawrence <alan.lawrence@arm.com> | 2015-07-27 15:55:23 +0000 |
|---|---|---|
| committer | Alan Lawrence <alalaw01@gcc.gnu.org> | 2015-07-27 15:55:23 +0000 |
| commit | 6d60b856e4228daa75ea3514bfcaf1664e2b56d3 (patch) | |
| tree | 24473b9cc956cab63f0782b09225caaa0a079651 /gcc/config | |
| parent | eaa80f646433fccf28ef3258a55ccaf8396cacc2 (diff) | |
| download | gcc-6d60b856e4228daa75ea3514bfcaf1664e2b56d3.zip gcc-6d60b856e4228daa75ea3514bfcaf1664e2b56d3.tar.gz gcc-6d60b856e4228daa75ea3514bfcaf1664e2b56d3.tar.bz2 | |
[ARM] PR/63870 Add a __builtin_lane_check
* config/arm/arm-builtins.c (enum arm_builtins):
Add ARM_BUILTIN_NEON_BASE and ARM_BUILTIN_NEON_LANE_CHECK.
(ARM_BUILTIN_NEON_BASE): Rename macro to....
(ARM_BUILTIN_NEON_PATTERN_START): ...this.
(arm_init_neon_builtins): Register __builtin_arm_lane_check.
(arm_expand_neon_builtin): Handle ARM_BUILTIN_NEON_LANE_CHECK.
From-SVN: r226252
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/arm/arm-builtins.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/gcc/config/arm/arm-builtins.c b/gcc/config/arm/arm-builtins.c index 7f711a8..030d8d1 100644 --- a/gcc/config/arm/arm-builtins.c +++ b/gcc/config/arm/arm-builtins.c @@ -532,12 +532,16 @@ enum arm_builtins #undef CRYPTO2 #undef CRYPTO3 + ARM_BUILTIN_NEON_BASE, + ARM_BUILTIN_NEON_LANE_CHECK = ARM_BUILTIN_NEON_BASE, + #include "arm_neon_builtins.def" ARM_BUILTIN_MAX }; -#define ARM_BUILTIN_NEON_BASE (ARM_BUILTIN_MAX - ARRAY_SIZE (neon_builtin_data)) +#define ARM_BUILTIN_NEON_PATTERN_START \ + (ARM_BUILTIN_MAX - ARRAY_SIZE (neon_builtin_data)) #undef CF #undef VAR1 @@ -896,7 +900,7 @@ arm_init_simd_builtin_scalar_types (void) static void arm_init_neon_builtins (void) { - unsigned int i, fcode = ARM_BUILTIN_NEON_BASE; + unsigned int i, fcode = ARM_BUILTIN_NEON_PATTERN_START; arm_init_simd_builtin_types (); @@ -906,6 +910,15 @@ arm_init_neon_builtins (void) system. */ arm_init_simd_builtin_scalar_types (); + tree lane_check_fpr = build_function_type_list (void_type_node, + intSI_type_node, + intSI_type_node, + NULL); + arm_builtin_decls[ARM_BUILTIN_NEON_LANE_CHECK] = + add_builtin_function ("__builtin_arm_lane_check", lane_check_fpr, + ARM_BUILTIN_NEON_LANE_CHECK, BUILT_IN_MD, + NULL, NULL_TREE); + for (i = 0; i < ARRAY_SIZE (neon_builtin_data); i++, fcode++) { bool print_type_signature_p = false; @@ -2169,14 +2182,31 @@ arm_expand_neon_args (rtx target, machine_mode map_mode, int fcode, return target; } -/* Expand a Neon builtin. These are "special" because they don't have symbolic +/* Expand a Neon builtin, i.e. those registered only if TARGET_NEON holds. + Most of these are "special" because they don't have symbolic constants defined per-instruction or per instruction-variant. Instead, the required info is looked up in the table neon_builtin_data. */ static rtx arm_expand_neon_builtin (int fcode, tree exp, rtx target) { + if (fcode == ARM_BUILTIN_NEON_LANE_CHECK) + { + /* Builtin is only to check bounds of the lane passed to some intrinsics + that are implemented with gcc vector extensions in arm_neon.h. */ + + tree nlanes = CALL_EXPR_ARG (exp, 0); + gcc_assert (TREE_CODE (nlanes) == INTEGER_CST); + rtx lane_idx = expand_normal (CALL_EXPR_ARG (exp, 1)); + if (CONST_INT_P (lane_idx)) + neon_lane_bounds (lane_idx, 0, TREE_INT_CST_LOW (nlanes), exp); + else + error ("%Klane index must be a constant immediate", exp); + /* Don't generate any RTL. */ + return const0_rtx; + } + neon_builtin_datum *d = - &neon_builtin_data[fcode - ARM_BUILTIN_NEON_BASE]; + &neon_builtin_data[fcode - ARM_BUILTIN_NEON_PATTERN_START]; enum insn_code icode = d->code; builtin_arg args[SIMD_MAX_BUILTIN_ARGS]; int num_args = insn_data[d->code].n_operands; |