In my last commit, I had a case where the mode iterator (VSX_L, FMOVE128_GPR)
used IFmode (IBM extended double) in code that was only meant for 128-bit types
that fit in a single vector. In the case of VSX_L, it had a condition on the
iterator, that would never be true for IFmode. But it didn't have the same
protection on FMOVE128_GPR, which calls an xxperm insn to reconstruct the
direct move on power8 (power8 can only move 32 or 64-bit objects directly, and
it needs to construct intermediate steps to move the value). I have removed
IFmode from the two iterators, and for KFmode/TFmode, added a check to make
sure the type is a vector type.
Since this was breaking the build, I applied the fix directly.
2015-11-16 Michael Meissner <meiss...@linux.vnet.ibm.com>
* config/rs6000/vsx.md (VSX_L): Do not include IBM extended double
128-bit types, just types that fit in a single vector.
* config/rs6000/rs6000.md (FMOVE128_GPR): Likewise.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.vnet.ibm.com, phone: +1 (978) 899-4797
Index: gcc/config/rs6000/vsx.md
===================================================================
--- gcc/config/rs6000/vsx.md (revision 230430)
+++ gcc/config/rs6000/vsx.md (working copy)
@@ -46,8 +46,6 @@ (define_mode_iterator VSX_DF [V2DF DF])
(define_mode_iterator VSX_F [V4SF V2DF])
;; Iterator for logical types supported by VSX
-;; Note, IFmode won't actually be used since it isn't a VSX type, but it
simplifies
-;; the code by using 128-bit iterators for floating point.
(define_mode_iterator VSX_L [V16QI
V8HI
V4SI
@@ -57,8 +55,7 @@ (define_mode_iterator VSX_L [V16QI
V1TI
TI
(KF "FLOAT128_VECTOR_P (KFmode)")
- (TF "FLOAT128_VECTOR_P (TFmode)")
- (IF "FLOAT128_VECTOR_P (IFmode)")])
+ (TF "FLOAT128_VECTOR_P (TFmode)")])
;; Iterator for memory move. Handle TImode specially to allow
;; it to use gprs as well as vsx registers.
Index: gcc/config/rs6000/rs6000.md
===================================================================
--- gcc/config/rs6000/rs6000.md (revision 230430)
+++ gcc/config/rs6000/rs6000.md (working copy)
@@ -409,9 +409,8 @@ (define_mode_iterator FMOVE128_GPR [(TI
(V2DI "")
(V2DF "")
(V1TI "")
- (KF "")
- (TF "")
- (IF "")])
+ (KF "FLOAT128_VECTOR_P (KFmode)")
+ (TF "FLOAT128_VECTOR_P (TFmode)")])
; Iterator for 128-bit VSX types for pack/unpack
(define_mode_iterator FMOVE128_VSX [V1TI KF])
