This patch adds the __insn_shufflebytes1, which takes only one argument.
result = __insn_shufflebytes1(input, select);
is equivalent to:
result = __insn_shufflebytes(result, input, select);
It has the advantage that the compiler will not waste a cycle
initializing result unnecessarily. It is the user's responsibility to
ensure that the select value is only selecting bytes from the second
operand. This has been backported to 4.7 and 4.8.
* config/tilegx/tilegx-builtins.h (enum tilegx_builtin): Add
TILEGX_INSN_SHUFFLEBYTES1.
* config/tilegx/tilegx.c (tilegx_builtin_info): Add entry for
shufflebytes1.
(tilegx_builtins): Ditto.
* config/tilegx/tilegx.md (insn_shufflebytes1): New pattern.
Index: gcc/config/tilegx/tilegx.md
===================================================================
--- gcc/config/tilegx/tilegx.md (revision 197079)
+++ gcc/config/tilegx/tilegx.md (working copy)
@@ -3959,6 +3959,15 @@
"shufflebytes\t%0, %r2, %r3"
[(set_attr "type" "X0")])
+(define_insn "insn_shufflebytes1"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (unspec:DI [(match_operand:DI 1 "reg_or_0_operand" "rO")
+ (match_operand:DI 2 "reg_or_0_operand" "rO")]
+ UNSPEC_INSN_SHUFFLEBYTES))]
+ ""
+ "shufflebytes\t%0, %r1, %r2"
+ [(set_attr "type" "X0")])
+
;; stores
(define_expand "insn_st"
Index: gcc/config/tilegx/tilegx-builtins.h
===================================================================
--- gcc/config/tilegx/tilegx-builtins.h (revision 197072)
+++ gcc/config/tilegx/tilegx-builtins.h (working copy)
@@ -193,6 +193,7 @@ enum tilegx_builtin
TILEGX_INSN_SHRU,
TILEGX_INSN_SHRUX,
TILEGX_INSN_SHUFFLEBYTES,
+ TILEGX_INSN_SHUFFLEBYTES1,
TILEGX_INSN_ST,
TILEGX_INSN_ST1,
TILEGX_INSN_ST2,
Index: gcc/config/tilegx/tilegx.c
===================================================================
--- gcc/config/tilegx/tilegx.c (revision 197074)
+++ gcc/config/tilegx/tilegx.c (working copy)
@@ -2897,6 +2897,7 @@ static struct tile_builtin_info tilegx_b
{ CODE_FOR_lshrdi3, NULL }, /* shru */
{ CODE_FOR_lshrsi3, NULL }, /* shrux */
{ CODE_FOR_insn_shufflebytes, NULL }, /* shufflebytes */
+ { CODE_FOR_insn_shufflebytes1, NULL }, /* shufflebytes1 */
{ CODE_FOR_insn_st, NULL }, /* st */
{ CODE_FOR_insn_st1, NULL }, /* st1 */
{ CODE_FOR_insn_st2, NULL }, /* st2 */
@@ -3225,6 +3226,7 @@ static const struct tilegx_builtin_def t
{ "__insn_shrux", TILEGX_INSN_SHRUX, true, "iii"
},
{ "__insn_shruxi", TILEGX_INSN_SHRUX, true, "iii"
},
{ "__insn_shufflebytes", TILEGX_INSN_SHUFFLEBYTES, true, "llll"
},
+ { "__insn_shufflebytes1", TILEGX_INSN_SHUFFLEBYTES1, true, "lll"
},
{ "__insn_st", TILEGX_INSN_ST, false, "vpl"
},
{ "__insn_st1", TILEGX_INSN_ST1, false, "vpl"
},
{ "__insn_st2", TILEGX_INSN_ST2, false, "vpl"
},
