For constant building e.g. r120=0x66666666, which does not fit 'li or lis',
'pli' is used to build this constant via 'emit_move_insn'.
While for a complicated constant, e.g. 0x6666666666666666ULL, when using
'rs6000_emit_set_long_const' to split the constant recursively, it fails to
use 'pli' to build the half part constant: 0x66666666.
'rs6000_emit_set_long_const' could be updated to use 'pli' to build half
part of the constant when necessary. For example: 0x6666666666666666ULL,
"pli 3,
1717986918; rldimi 3,3,32,0" can be used.
gcc/ChangeLog:
* config/rs6000/rs6000.cc (rs6000_emit_set_long_const): Add code to use
pli for 34bit constant.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/const-build-1.c: New test.
emit_insn (dest_or_insn);
};
+ if (TARGET_PREFIXED && SIGNED_INTEGER_34BIT_P (c))
+ {
+ /* li/lis/pli */
+ count_or_emit_insn (dest, GEN_INT (c));
+ return;
+ }
+
if ((ud4 == 0xffff && ud3 == 0xffff && ud2 == 0xffff && (ud1 & 0x8000))
|| (ud4 == 0 && ud3 == 0 && ud2 == 0 && !(ud1 & 0x8000)))
{
--- /dev/null
+/* { dg-do compile { target lp64 } } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10" } */
+/* { dg-require-effective-target power10_ok } */
+
+unsigned long long msk66() { return 0x6666666666666666ULL; }
+
+/* { dg-final { scan-assembler-times {\mpli\M} 1 } } */
+/* { dg-final { scan-assembler-not {\mli\M} } } */
+/* { dg-final { scan-assembler-not {\mlis\M} } } */