From: Pan Li <[email protected]>
Like vw{add,sub,mul}[u].vv, allow the rvv register overlap for
the dual widen vv insn vwmulsu.vv.
gcc/ChangeLog:
* config/riscv/vector.md: Leverage Wvr constraint.
Signed-off-by: Pan Li <[email protected]>
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
---
gcc/config/riscv/vector.md | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/gcc/config/riscv/vector.md b/gcc/config/riscv/vector.md
index afaa3a51ece..4efee02fb3b 100644
--- a/gcc/config/riscv/vector.md
+++ b/gcc/config/riscv/vector.md
@@ -4303,22 +4303,22 @@ (define_insn
"@pred_single_widen_sub<any_extend:su><mode>_extended_scalar"
(set_attr "mode" "<V_DOUBLE_TRUNC>")])
(define_insn "@pred_widen_mulsu<mode>"
- [(set (match_operand:VWEXTI 0 "register_operand" "=&vr,&vr")
+ [(set (match_operand:VWEXTI 0 "register_operand" "=vr, vr,
vd, vd")
(if_then_else:VWEXTI
(unspec:<VM>
- [(match_operand:<VM> 1 "vector_mask_operand"
"vmWc1,vmWc1")
- (match_operand 5 "vector_length_operand" " rvl,
rvl")
- (match_operand 6 "const_int_operand" " i,
i")
- (match_operand 7 "const_int_operand" " i,
i")
- (match_operand 8 "const_int_operand" " i,
i")
+ [(match_operand:<VM> 1 "vector_mask_operand" "Wc1,Wc1,
vm, vm")
+ (match_operand 5 "vector_length_operand"
"rvl,rvl,rvl,rvl")
+ (match_operand 6 "const_int_operand" " i, i,
i, i")
+ (match_operand 7 "const_int_operand" " i, i,
i, i")
+ (match_operand 8 "const_int_operand" " i, i,
i, i")
(reg:SI VL_REGNUM)
(reg:SI VTYPE_REGNUM)] UNSPEC_VPREDICATE)
(mult:VWEXTI
(sign_extend:VWEXTI
- (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand" " vr,
vr"))
+ (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand"
"Wvr,Wvr,Wvr,Wvr"))
(zero_extend:VWEXTI
- (match_operand:<V_DOUBLE_TRUNC> 4 "register_operand" " vr,
vr")))
- (match_operand:VWEXTI 2 "vector_merge_operand" " vu,
0")))]
+ (match_operand:<V_DOUBLE_TRUNC> 4 "register_operand"
"Wvr,Wvr,Wvr,Wvr")))
+ (match_operand:VWEXTI 2 "vector_merge_operand" " vu, 0,
vu, 0")))]
"TARGET_VECTOR"
"vwmulsu.vv\t%0,%3,%4%p1"
[(set_attr "type" "viwmul")
--
2.43.0
