https://gcc.gnu.org/g:f44372f7e53e70b3a18822cbcc9fd024efea1152
commit f44372f7e53e70b3a18822cbcc9fd024efea1152
Author: Michael Meissner <meiss...@linux.ibm.com>
Date: Fri May 3 21:06:39 2024 -0400
RFC2677-Add xvrlw support.
2024-05-03 Michael Meissner <meiss...@linux.ibm.com>
gcc/
* config/rs6000/altivec.md (xvrlw): New insn.
* config/rs6000/rs6000.h (TARGET_XVRLW): New macro.
gcc/testsuite/
* gcc.target/powerpc/vector-rotate-left.c: New test.
Diff:
---
gcc/config/rs6000/altivec.md | 14 +++++++++
gcc/config/rs6000/rs6000.h | 3 ++
.../gcc.target/powerpc/vector-rotate-left.c | 34 ++++++++++++++++++++++
3 files changed, 51 insertions(+)
diff --git a/gcc/config/rs6000/altivec.md b/gcc/config/rs6000/altivec.md
index bb20441c096..5e802c59b69 100644
--- a/gcc/config/rs6000/altivec.md
+++ b/gcc/config/rs6000/altivec.md
@@ -1883,6 +1883,20 @@
}
[(set_attr "type" "vecperm")])
+;; -mcpu=future adds a vector rotate left word variant. There is no vector
+;; byte/half-word/double-word/quad-word rotate left. This insn occurs before
+;; altivec_vrl<VI_char> and will match for -mcpu=future, while other cpus will
+;; match the generic insn.
+(define_insn "*xvrlw"
+ [(set (match_operand:V4SI 0 "register_operand" "=v,wa")
+ (rotate:V4SI (match_operand:V4SI 1 "register_operand" "v,wa")
+ (match_operand:V4SI 2 "register_operand" "v,wa")))]
+ "TARGET_XVRLW"
+ "@
+ vrlw %0,%1,%2
+ xvrlw %x0,%x1,%x2"
+ [(set_attr "type" "vecsimple")])
+
(define_insn "altivec_vrl<VI_char>"
[(set (match_operand:VI2 0 "register_operand" "=v")
(rotate:VI2 (match_operand:VI2 1 "register_operand" "v")
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 1c44726f074..474c47a7959 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -578,6 +578,9 @@ extern int rs6000_vector_align[];
/* Whether we have PADDIS support. */
#define TARGET_PADDIS TARGET_FUTURE
+/* Whether we have XVRLW support. */
+#define TARGET_XVRLW TARGET_FUTURE
+
/* Whether the various reciprocal divide/square root estimate instructions
exist, and whether we should automatically generate code for the instruction
by default. */
diff --git a/gcc/testsuite/gcc.target/powerpc/vector-rotate-left.c
b/gcc/testsuite/gcc.target/powerpc/vector-rotate-left.c
new file mode 100644
index 00000000000..5a5f3775507
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/vector-rotate-left.c
@@ -0,0 +1,34 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_future_ok } */
+/* { dg-require-effective-target lp64 } */
+/* { dg-options "-mdejagnu-cpu=future -O2" } */
+
+/* Test whether the xvrl (vector word rotate left using VSX registers insead of
+ Altivec registers is generated. */
+
+#include <altivec.h>
+
+typedef vector unsigned int v4si_t;
+
+v4si_t
+rotl_v4si_scalar (v4si_t x, unsigned long n)
+{
+ __asm__ (" # %x0" : "+f" (x));
+ return (x << n) | (x >> (32 - n)); /* xvrlw. */
+}
+
+v4si_t
+rotr_v4si_scalar (v4si_t x, unsigned long n)
+{
+ __asm__ (" # %x0" : "+f" (x));
+ return (x >> n) | (x << (32 - n)); /* xvrlw. */
+}
+
+v4si_t
+rotl_v4si_vector (v4si_t x, v4si_t y)
+{
+ __asm__ (" # %x0" : "+f" (x)); /* xvrlw. */
+ return vec_rl (x, y);
+}
+
+/* { dg-final { scan-assembler-times {\mxvrlw\M} 3 } } */
