Hi,
The MLA by-element instructions have the same restriction as other by-element
instructions whereby the forms operating on vectors of 16-bit integer data
may only use registers v0-v15. We have an iterator for that, applied to the
other patterns generating this instruction, so use that.
Bootstrap and test OK, Applied as r251568.
Thanks,
James
---
2017-08-31 James Greenhalgh <james.greenha...@arm.com>
* config/aarch64/aarch64-simd.md (aarch64_mla_elt_merge<mode>): Fix
register constraint for by-element operand.
(aarch64_mls_elt_merge<mode>): Likewise.
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index bf2db02..051d2a9 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -1072,7 +1072,7 @@
[(set (match_operand:VDQHS 0 "register_operand" "=w")
(plus:VDQHS
(mult:VDQHS (vec_duplicate:VDQHS
- (match_operand:<VEL> 1 "register_operand" "w"))
+ (match_operand:<VEL> 1 "register_operand" "<h_con>"))
(match_operand:VDQHS 2 "register_operand" "w"))
(match_operand:VDQHS 3 "register_operand" "0")))]
"TARGET_SIMD"
@@ -1132,7 +1132,7 @@
(minus:VDQHS
(match_operand:VDQHS 1 "register_operand" "0")
(mult:VDQHS (vec_duplicate:VDQHS
- (match_operand:<VEL> 2 "register_operand" "w"))
+ (match_operand:<VEL> 2 "register_operand" "<h_con>"))
(match_operand:VDQHS 3 "register_operand" "w"))))]
"TARGET_SIMD"
"mls\t%0.<Vtype>, %3.<Vtype>, %2.<Vetype>[0]"
