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Use PLI to load up large constants if -mcpu=future.

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2019-12-17  Michael Meissner  <meissner@linux.ibm.com>

	* config/rs6000/rs6000.c (num_insns_constant_gpr): Return 1 if the
	constant can be loaded with PLI if -mcpu=future.
	* config/rs6000/rs6000.md (movdi_internal64): Add alternative to
	use PLI to load up 34-bit constants if -mcpu=future.

From-SVN: r279474
This commit is contained in:
Michael Meissner 2019-12-17 22:11:55 +00:00 committed by Michael Meissner
parent 4f05d85a22
commit a50e038893
3 changed files with 18 additions and 6 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2019-12-17 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.c (num_insns_constant_gpr): Return 1 if the
constant can be loaded with PLI if -mcpu=future.
* config/rs6000/rs6000.md (movdi_internal64): Add alternative to
use PLI to load up 34-bit constants if -mcpu=future.
2019-12-17 Jakub Jelinek <jakub@redhat.com>
PR target/92841

4
gcc/config/rs6000/rs6000.c
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@ -5565,6 +5565,10 @@ num_insns_constant_gpr (HOST_WIDE_INT value)
&& (value >> 31 == -1 || value >> 31 == 0))
return 1;
/* PADDI can support up to 34 bit signed integers. */
else if (TARGET_PREFIXED_ADDR && SIGNED_34BIT_OFFSET_P (value))
return 1;
else if (TARGET_POWERPC64)
{
HOST_WIDE_INT low = ((value & 0xffffffff) ^ 0x80000000) - 0x80000000;

13
gcc/config/rs6000/rs6000.md
View File

@ -8828,7 +8828,7 @@
})
;; GPR store GPR load GPR move
;; GPR li GPR lis GPR #
;; GPR li GPR lis GPR pli GPR #
;; FPR store FPR load FPR move
;; AVX store AVX store AVX load AVX load VSX move
;; P9 0 P9 -1 AVX 0/-1 VSX 0 VSX -1
@ -8838,7 +8838,7 @@
(define_insn "*movdi_internal64"
[(set (match_operand:DI 0 "nonimmediate_operand"
"=YZ, r, r,
r, r, r,
r, r, r, r,
m, ^d, ^d,
wY, Z, $v, $v, ^wa,
wa, wa, v, wa, wa,
@ -8847,7 +8847,7 @@
?r, ?wa")
(match_operand:DI 1 "input_operand"
"r, YZ, r,
I, L, nF,
I, L, eI, nF,
^d, m, ^d,
^v, $v, wY, Z, ^wa,
Oj, wM, OjwM, Oj, wM,
@ -8863,6 +8863,7 @@
mr %0,%1
li %0,%1
lis %0,%v1
li %0,%1
#
stfd%U0%X0 %1,%0
lfd%U1%X1 %0,%1
@ -8886,7 +8887,7 @@
mtvsrd %x0,%1"
[(set_attr "type"
"store, load, *,
*, *, *,
*, *, *, *,
fpstore, fpload, fpsimple,
fpstore, fpstore, fpload, fpload, veclogical,
vecsimple, vecsimple, vecsimple, veclogical, veclogical,
@ -8896,7 +8897,7 @@
(set_attr "size" "64")
(set_attr "length"
"*, *, *,
*, *, 20,
*, *, *, 20,
*, *, *,
*, *, *, *, *,
*, *, *, *, *,
@ -8905,7 +8906,7 @@
*, *")
(set_attr "isa"
"*, *, *,
*, *, *,
*, *, fut, *,
*, *, *,
p9v, p7v, p9v, p7v, *,
p9v, p9v, p7v, *, *,