Hi Guys,
I am applying the patch below to fix a problem with the MSP430's
zero_extendhipsi2 pattern. When the destination is memory, four bytes
must be written, even though only a 20-bit value is being stored, as
otherwise the top nibble will be lost.
Cheers
Nick
gcc/ChangeLog
2015-07-01 Nick Clifton <ni...@redhat.com>
* config/msp430/msp430.md (zero_extendhipsi2): Use MOVX.A to store
a 16-bit value into a 20-bit memory slot.
Index: config/msp430/msp430.md
===================================================================
--- config/msp430/msp430.md (revision 225239)
+++ config/msp430/msp430.md (working copy)
@@ -572,7 +572,9 @@
[(set (match_operand:PSI 0 "msp_nonimmediate_operand" "=r,m")
(zero_extend:PSI (match_operand:HI 1 "msp_nonimmediate_operand"
"rm,r")))]
""
- "MOVX\t%1, %0"
+ "@
+ MOVX\t%1, %0
+ MOVX.A\t%1, %0"
)
(define_insn "truncpsihi2"
