The comment previously here stated that the Wc0/Wc1 cases are handled by
the vi constraint but that is not true for the 0.0 Wc0 case.
gcc/ChangeLog:
* config/riscv/riscv.cc (riscv_const_insns): Handle 0.0 floating-point
case.
Signed-off-by: Patrick O'Neill <[email protected]>
---
gcc/config/riscv/riscv.cc | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index c3877008d05..dc9e9280c8c 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -2162,11 +2162,9 @@ riscv_const_insns (rtx x, bool allow_new_pseudos)
if (maybe_gt (GET_MODE_SIZE (smode), UNITS_PER_WORD)
&& !immediate_operand (elt, Pmode))
return 0;
- /* Constants from -16 to 15 can be loaded with vmv.v.i.
- The Wc0, Wc1 constraints are already covered by the
- vi constraint so we do not need to check them here
- separately. */
- if (satisfies_constraint_vi (x))
+ /* Constants in range -16 ~ 15 integer or 0.0 floating-point
+ can be emitted using vmv.v.i. */
+ if (satisfies_constraint_vi (x) || satisfies_constraint_Wc0 (x))
return 1;
/* Any int/FP constants can always be broadcast from a
--
2.34.1
