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author | wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-09-11 01:49:40 +0000 |
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committer | wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-09-11 01:49:40 +0000 |
commit | 6e68dcb23cac6f9178ace9f194fd4a5b51fc53b1 (patch) | |
tree | 5f26c8b021c77fc1c736d8455c21494156de0131 /gcc/emit-rtl.c | |
parent | fceed818838afcb709ccd266c0ce9a75053977d4 (diff) | |
download | gcc-6e68dcb23cac6f9178ace9f194fd4a5b51fc53b1.tar.gz |
Add CONST1_RTX (vector mode) support.
* emit-rtl.c (gen_const_vector): Renamed from gen_const_vector_0.
Add integer argument named constant. Use const_tiny_rtx instead of
CONST0_RTX.
(gen_rtx_CONST_VECTOR): Rewrite to handle checks for both CONST0_RTX
and CONST1_RTX.
(init_emit_once): Fix users of gen_const_vector. Set CONST1_RTX for
vector types.
* expr.c (const_vector_from_tree): Call gen_rtx_CONST_VECTOR instead
of gen_rtx_raw_CONST_VECTOR.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@87337 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/emit-rtl.c')
-rw-r--r-- | gcc/emit-rtl.c | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index ab721fe8aa7..1dcda2c0403 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -194,7 +194,7 @@ static hashval_t reg_attrs_htab_hash (const void *); static int reg_attrs_htab_eq (const void *, const void *); static reg_attrs *get_reg_attrs (tree, int); static tree component_ref_for_mem_expr (tree); -static rtx gen_const_vector_0 (enum machine_mode); +static rtx gen_const_vector (enum machine_mode, int); static rtx gen_complex_constant_part (enum machine_mode, rtx, int); static void copy_rtx_if_shared_1 (rtx *orig); @@ -5162,10 +5162,10 @@ init_emit (void) #endif } -/* Generate the constant 0. */ +/* Generate a vector constant for mode MODE and constant value CONSTANT. */ static rtx -gen_const_vector_0 (enum machine_mode mode) +gen_const_vector (enum machine_mode mode, int constant) { rtx tem; rtvec v; @@ -5177,28 +5177,44 @@ gen_const_vector_0 (enum machine_mode mode) v = rtvec_alloc (units); - /* We need to call this function after we to set CONST0_RTX first. */ - gcc_assert (CONST0_RTX (inner)); + /* We need to call this function after we set the scalar const_tiny_rtx + entries. */ + gcc_assert (const_tiny_rtx[constant][(int) inner]); for (i = 0; i < units; ++i) - RTVEC_ELT (v, i) = CONST0_RTX (inner); + RTVEC_ELT (v, i) = const_tiny_rtx[constant][(int) inner]; tem = gen_rtx_raw_CONST_VECTOR (mode, v); return tem; } /* Generate a vector like gen_rtx_raw_CONST_VEC, but use the zero vector when - all elements are zero. */ + all elements are zero, and the one vector when all elements are one. */ rtx gen_rtx_CONST_VECTOR (enum machine_mode mode, rtvec v) { - rtx inner_zero = CONST0_RTX (GET_MODE_INNER (mode)); + enum machine_mode inner = GET_MODE_INNER (mode); + int nunits = GET_MODE_NUNITS (mode); + rtx x; int i; - for (i = GET_MODE_NUNITS (mode) - 1; i >= 0; i--) - if (RTVEC_ELT (v, i) != inner_zero) - return gen_rtx_raw_CONST_VECTOR (mode, v); - return CONST0_RTX (mode); + /* Check to see if all of the elements have the same value. */ + x = RTVEC_ELT (v, nunits - 1); + for (i = nunits - 2; i >= 0; i--) + if (RTVEC_ELT (v, i) != x) + break; + + /* If the values are all the same, check to see if we can use one of the + standard constant vectors. */ + if (i == -1) + { + if (x == CONST0_RTX (inner)) + return CONST0_RTX (mode); + else if (x == CONST1_RTX (inner)) + return CONST1_RTX (mode); + } + + return gen_rtx_raw_CONST_VECTOR (mode, v); } /* Create some permanent unique rtl objects shared between all functions. @@ -5352,12 +5368,18 @@ init_emit_once (int line_numbers) for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT); mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) - const_tiny_rtx[0][(int) mode] = gen_const_vector_0 (mode); + { + const_tiny_rtx[0][(int) mode] = gen_const_vector (mode, 0); + const_tiny_rtx[1][(int) mode] = gen_const_vector (mode, 1); + } for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT); mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) - const_tiny_rtx[0][(int) mode] = gen_const_vector_0 (mode); + { + const_tiny_rtx[0][(int) mode] = gen_const_vector (mode, 0); + const_tiny_rtx[1][(int) mode] = gen_const_vector (mode, 1); + } for (i = (int) CCmode; i < (int) MAX_MACHINE_MODE; ++i) if (GET_MODE_CLASS ((enum machine_mode) i) == MODE_CC) |