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| author | Georg-Johann Lay <avr@gjlay.de> | 2016-08-01 12:23:17 +0000 |
|---|---|---|
| committer | Georg-Johann Lay <gjl@gcc.gnu.org> | 2016-08-01 12:23:17 +0000 |
| commit | ee52b11b30850324bb13b132e78c18e9d3d65e63 (patch) | |
| tree | 4b91588e2f3f59ed75a7e09cde118171c919bf8a /gcc/config/avr | |
| parent | 7481147265a13c906467edec41927b3f106fe558 (diff) | |
| download | gcc-ee52b11b30850324bb13b132e78c18e9d3d65e63.zip gcc-ee52b11b30850324bb13b132e78c18e9d3d65e63.tar.gz gcc-ee52b11b30850324bb13b132e78c18e9d3d65e63.tar.bz2 | |
extend.texi (AVR Built-in Functions): Document __builtin_avr_nops.
* doc/extend.texi (AVR Built-in Functions): Document
__builtin_avr_nops.
* config/avr/builtins.def (NOPS): New.
* config/avr/avr.c (avr_expand_nops): New static function.
(avr_expand_builtin): Use it to handle AVR_BUILTIN_NOPS.
From-SVN: r238947
Diffstat (limited to 'gcc/config/avr')
| -rw-r--r-- | gcc/config/avr/avr.c | 25 | ||||
| -rw-r--r-- | gcc/config/avr/builtins.def | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index a2a0d38..fba62d2 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -12714,6 +12714,18 @@ avr_expand_delay_cycles (rtx operands0) } +static void +avr_expand_nops (rtx operands0) +{ + unsigned HOST_WIDE_INT n_nops = UINTVAL (operands0) & GET_MODE_MASK (HImode); + + while (n_nops--) + { + emit_insn (gen_nopv (const1_rtx)); + } +} + + /* Compute the image of x under f, i.e. perform x --> f(x) */ static int @@ -13388,6 +13400,19 @@ avr_expand_builtin (tree exp, rtx target, return NULL_RTX; } + case AVR_BUILTIN_NOPS: + { + arg0 = CALL_EXPR_ARG (exp, 0); + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, EXPAND_NORMAL); + + if (!CONST_INT_P (op0)) + error ("%s expects a compile time integer constant", bname); + else + avr_expand_nops (op0); + + return NULL_RTX; + } + case AVR_BUILTIN_INSERT_BITS: { arg0 = CALL_EXPR_ARG (exp, 0); diff --git a/gcc/config/avr/builtins.def b/gcc/config/avr/builtins.def index a262dc5..4088c0a 100644 --- a/gcc/config/avr/builtins.def +++ b/gcc/config/avr/builtins.def @@ -51,6 +51,7 @@ DEF_BUILTIN (FMULSU, 2, int_ftype_char_uchar, fmulsu, NULL) /* More complex stuff that cannot be mapped 1:1 to an instruction. */ DEF_BUILTIN (DELAY_CYCLES, -1, void_ftype_ulong, nothing, NULL) +DEF_BUILTIN (NOPS, -1, void_ftype_ulong, nothing, NULL) DEF_BUILTIN (INSERT_BITS, 3, uchar_ftype_ulong_uchar_uchar, insert_bits, NULL) DEF_BUILTIN (FLASH_SEGMENT, 1, char_ftype_const_memx_ptr, flash_segment, NULL) |