Add get_altfmt(rtx) helper function to extract the altfmt operand value
from RTL operands. Also add ALTFMT_ANY enum value.
This allows instructions with an altfmt operand to use the "altfmt"
machine attribute to pass that operand to the vsetvl pass, e.g.:
(define_attr "altfmt" ""
(cond [(eq_attr "type" "some_type")
(symbol_ref "riscv_vector::get_altfmt(operands[N])")]
(const_int INVALID_ATTRIBUTE)))
The ALTFMT_ANY value is handled specially: it returns INVALID_ATTRIBUTE
to indicate no specific altfmt preference.
Signed-off-by: tanshanshan <[email protected]>
---
gcc/config/riscv/riscv-protos.h | 2 ++
gcc/config/riscv/riscv-v.cc | 9 +++++++++
2 files changed, 11 insertions(+)
diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
index 5fd2328062d9..a497ecdfe587 100644
--- a/gcc/config/riscv/riscv-protos.h
+++ b/gcc/config/riscv/riscv-protos.h
@@ -648,6 +648,7 @@ unsigned int get_nf (machine_mode);
machine_mode get_subpart_mode (machine_mode);
int get_ta (rtx);
int get_ma (rtx);
+int get_altfmt (rtx);
int get_avl_type (rtx);
unsigned int calculate_ratio (unsigned int, enum vlmul_type);
enum tail_policy
@@ -673,6 +674,7 @@ enum altfmt_type
{
ALTFMT_NONE = 0,
ALTFMT_ALT = 1,
+ ALTFMT_ANY = 2,
};
/* Return true if VALUE is agnostic or any policy. */
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index 431aaa1e7616..bda73845571b 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -2132,6 +2132,15 @@ get_ma (rtx ma)
return INTVAL (ma);
}
+/* Get altfmt according to operand[altfmt_op_idx]. */
+int
+get_altfmt (rtx ma)
+{
+ if (INTVAL (ma) == ALTFMT_ANY)
+ return INVALID_ATTRIBUTE;
+ return INTVAL (ma);
+}
+
/* Get preferred tail policy. */
enum tail_policy
get_prefer_tail_policy ()
--
2.43.0
