ldcws,co 0(%r20), %r19
which is accepted by the HP assembler, but gas barfs with:
Error: Invalid Short Load/Store Completer.
gas apparently doesn't like the cache control hint completor, which is critical for semaphore performance on PA-RISC. I've tried every reasonable combination of characters for the completer that I can think of, and nothing seems to work.
Here's a patch to 2.15 which I believe fixes the issue:
--- binutils-2.16-old/include/opcode/hppa.h Fri May 6 15:50:54 2005
+++ binutils-2.16/include/opcode/hppa.h Fri May 6 15:41:24 2005
@@ -437,8 +437,8 @@
{ "ldbs", 0x0c001000, 0xfc001fc0, "cM5(s,b),t", pa10, 0},
{ "ldbs", 0x0c001000, 0xfc001fc0, "cM5(b),t", pa10, 0},
{ "ldwas", 0x0c001180, 0xfc00dfc0, "cM5(b),t", pa10, 0},
-{ "ldcws", 0x0c0011c0, 0xfc001fc0, "cM5(s,b),t", pa10, 0},
-{ "ldcws", 0x0c0011c0, 0xfc001fc0, "cM5(b),t", pa10, 0},
+{ "ldcws", 0x0c0011c0, 0xfc001fc0, "cd5(s,b),t", pa10, 0},
+{ "ldcws", 0x0c0011c0, 0xfc001fc0, "cd5(b),t", pa10, 0},
{ "stws", 0x0c001280, 0xfc001fc0, "cMx,V(s,b)", pa10, 0},
{ "stws", 0x0c001280, 0xfc001fc0, "cMx,V(b)", pa10, 0},
{ "sths", 0x0c001240, 0xfc001fc0, "cMx,V(s,b)", pa10, 0},
Thanks, Dan
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