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| author | Aldy Hernandez <aldyh@gcc.gnu.org> | 2002-06-18 01:35:47 +0000 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@gcc.gnu.org> | 2002-06-18 01:35:47 +0000 |
| commit | cb2a532e9fe754ec238fe679a131e1fd1c8c340e (patch) | |
| tree | 73deecdababef51a80958fcc5dee4038fb6bac71 /gcc/simplify-rtx.c | |
| parent | 147d5f6f769614edda4de1f400fc603496da5170 (diff) | |
| download | gcc-cb2a532e9fe754ec238fe679a131e1fd1c8c340e.zip gcc-cb2a532e9fe754ec238fe679a131e1fd1c8c340e.tar.gz gcc-cb2a532e9fe754ec238fe679a131e1fd1c8c340e.tar.bz2 | |
simd-1.c: New.
2002-06-16 Aldy Hernandez <aldyh@redhat.com>
* gcc.c-torture/execute/simd-1.c: New.
* gcc.dg/simd-1.c: New.
* doc/extend.texi (Vector Extensions): Document that we can
specify simd types not specifically supported by the hardware.
Document that simd types can be used as function arguments.
Document that signness does make a difference in SIMD types.
Misc cleanups and revisions to the "vector extensions" section.
* simplify-rtx.c (simplify_subreg): Simplify subregs of vector
constants.
* expr.c (vector_mode_valid_p): New.
* expr.h: Add vector_mode_valid_p.
* defaults.h (VECTOR_MODE_SUPPORTED_P): Set default.
* emit-rtl.c (immed_double_const): Do not abort on vectors.
* c-common.c (type_for_mode): Always build vector nodes regardless
of VECTOR_MODE_SUPPORTED_P.
(handle_mode_attribute): Error if we can't emulate a nonexisting
vector mode.
(handle_vector_size_attribute): Same.
* optabs.c (expand_binop): Open-code vector operations.
(expand_unop): Open-code vector unops.
(expand_vector_binop): New.
(expand_vector_unop): New.
* c-typeck.c (build_binary_op): Allow vectors in binops.
Allow vectors in conditional operatiors.
(build_unary_op): Allow vectors in unary minus.
* config/rs6000/rs6000.h (ALTIVEC_VECTOR_MODE): Conditionalize on
TARGET_ALTIVEC.
From-SVN: r54727
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 5a4509c..cdc6043 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2268,6 +2268,24 @@ simplify_subreg (outermode, op, innermode, byte) if (outermode == innermode && !byte) return op; + /* Simplify subregs of vector constants. */ + if (GET_CODE (op) == CONST_VECTOR) + { + int offset = byte / UNITS_PER_WORD; + rtx elt; + + /* This shouldn't happen, but let's not do anything stupid. */ + if (GET_MODE_INNER (innermode) != outermode) + return NULL_RTX; + + elt = CONST_VECTOR_ELT (op, offset); + + /* ?? We probably don't need this copy_rtx because constants + can be shared. ?? */ + + return copy_rtx (elt); + } + /* Attempt to simplify constant to non-SUBREG expression. */ if (CONSTANT_P (op)) { |