This patch adds patterns to match conditional unary operations
on integers. At the moment we rely on combine to merge separate
arithmetic and vcond_mask operations, and since the latter doesn't
accept zero operands, we miss out on the opportunity to use the
movprfx /z alternative. (This alternative is tested by the ACLE
patches though.)
Tested on aarch64-linux-gnu (with and without SVE) and aarch64_be-elf.
Applied as r274476.
Richard
2019-08-14 Richard Sandiford <richard.sandif...@arm.com>
Kugan Vivekanandarajah <kugan.vivekanandara...@linaro.org>
gcc/
* config/aarch64/aarch64-sve.md
(*cond_<SVE_INT_UNARY:optab><SVE_I:mode>_2): New pattern.
(*cond_<SVE_INT_UNARY:optab><SVE_I:mode>_any): Likewise.
gcc/testsuite/
* gcc.target/aarch64/sve/cond_unary_1.c: New test.
* gcc.target/aarch64/sve/cond_unary_1_run.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_2.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_2_run.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_3.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_3_run.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_4.c: Likewise.
* gcc.target/aarch64/sve/cond_unary_4_run.c: Likewise.
Index: gcc/config/aarch64/aarch64-sve.md
===================================================================
--- gcc/config/aarch64/aarch64-sve.md 2019-08-14 10:28:46.145666799 +0100
+++ gcc/config/aarch64/aarch64-sve.md 2019-08-14 11:47:53.151171700 +0100
@@ -1454,6 +1454,45 @@ (define_insn "*<optab><mode>2"
"<sve_int_op>\t%0.<Vetype>, %1/m, %2.<Vetype>"
)
+;; Predicated integer unary arithmetic, merging with the first input.
+(define_insn "*cond_<optab><mode>_2"
+ [(set (match_operand:SVE_I 0 "register_operand" "=w, ?&w")
+ (unspec:SVE_I
+ [(match_operand:<VPRED> 1 "register_operand" "Upl, Upl")
+ (SVE_INT_UNARY:SVE_I
+ (match_operand:SVE_I 2 "register_operand" "0, w"))
+ (match_dup 2)]
+ UNSPEC_SEL))]
+ "TARGET_SVE"
+ "@
+ <sve_int_op>\t%0.<Vetype>, %1/m, %0.<Vetype>
+ movprfx\t%0, %2\;<sve_int_op>\t%0.<Vetype>, %1/m, %2.<Vetype>"
+ [(set_attr "movprfx" "*,yes")]
+)
+
+;; Predicated integer unary arithmetic, merging with an independent value.
+;;
+;; The earlyclobber isn't needed for the first alternative, but omitting
+;; it would only help the case in which operands 2 and 3 are the same,
+;; which is handled above rather than here. Marking all the alternatives
+;; as earlyclobber helps to make the instruction more regular to the
+;; register allocator.
+(define_insn "*cond_<optab><mode>_any"
+ [(set (match_operand:SVE_I 0 "register_operand" "=&w, ?&w, ?&w")
+ (unspec:SVE_I
+ [(match_operand:<VPRED> 1 "register_operand" "Upl, Upl, Upl")
+ (SVE_INT_UNARY:SVE_I
+ (match_operand:SVE_I 2 "register_operand" "w, w, w"))
+ (match_operand:SVE_I 3 "aarch64_simd_reg_or_zero" "0, Dz, w")]
+ UNSPEC_SEL))]
+ "TARGET_SVE && !rtx_equal_p (operands[2], operands[3])"
+ "@
+ <sve_int_op>\t%0.<Vetype>, %1/m, %2.<Vetype>
+ movprfx\t%0.<Vetype>, %1/z, %2.<Vetype>\;<sve_int_op>\t%0.<Vetype>, %1/m,
%2.<Vetype>
+ movprfx\t%0, %3\;<sve_int_op>\t%0.<Vetype>, %1/m, %2.<Vetype>"
+ [(set_attr "movprfx" "*,yes,yes")]
+)
+
;; -------------------------------------------------------------------------
;; ---- [INT] Logical inverse
;; -------------------------------------------------------------------------
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_1.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_1.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include <stdint.h>
+
+#define abs(A) ((A) < 0 ? -(A) : (A))
+#define neg(A) (-(A))
+
+#define DEF_LOOP(TYPE, OP) \
+ void __attribute__ ((noipa)) \
+ test_##TYPE##_##OP (TYPE *__restrict r, TYPE *__restrict a, \
+ TYPE *__restrict pred, int n) \
+ { \
+ for (int i = 0; i < n; ++i) \
+ r[i] = pred[i] ? OP (a[i]) : a[i]; \
+ }
+
+#define TEST_TYPE(T, TYPE) \
+ T (TYPE, abs) \
+ T (TYPE, neg)
+
+#define TEST_ALL(T) \
+ TEST_TYPE (T, int8_t) \
+ TEST_TYPE (T, int16_t) \
+ TEST_TYPE (T, int32_t) \
+ TEST_TYPE (T, int64_t)
+
+TEST_ALL (DEF_LOOP)
+
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-not {\tmov\tz} } } */
+/* { dg-final { scan-assembler-not {\tmovprfx\t} } } */
+/* XFAILed because the ?: gets canonicalized so that the operation is in
+ the false arm. */
+/* { dg-final { scan-assembler-not {\tsel\t} { xfail *-*-* } } } */
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_1_run.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_1_run.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,27 @@
+/* { dg-do run { target { aarch64_sve_hw } } } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include "cond_unary_1.c"
+
+#define N 99
+
+#define TEST_LOOP(TYPE, OP) \
+ { \
+ TYPE r[N], a[N], pred[N]; \
+ for (int i = 0; i < N; ++i) \
+ { \
+ a[i] = (i & 1 ? i : 3 * i) * (i % 3 == 0 ? 1 : -1); \
+ pred[i] = (i % 7 < 4); \
+ asm volatile ("" ::: "memory"); \
+ } \
+ test_##TYPE##_##OP (r, a, pred, N); \
+ for (int i = 0; i < N; ++i) \
+ if (r[i] != (pred[i] ? OP (a[i]) : a[i])) \
+ __builtin_abort (); \
+ }
+
+int main ()
+{
+ TEST_ALL (TEST_LOOP)
+ return 0;
+}
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_2.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_2.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,43 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include <stdint.h>
+
+#define abs(A) ((A) < 0 ? -(A) : (A))
+#define neg(A) (-(A))
+
+#define DEF_LOOP(TYPE, OP) \
+ void __attribute__ ((noipa)) \
+ test_##TYPE##_##OP (TYPE *__restrict r, TYPE *__restrict a, \
+ TYPE *__restrict b, \
+ TYPE *__restrict pred, int n) \
+ { \
+ for (int i = 0; i < n; ++i) \
+ r[i] = pred[i] ? OP (a[i]) : b[i]; \
+ }
+
+#define TEST_TYPE(T, TYPE) \
+ T (TYPE, abs) \
+ T (TYPE, neg)
+
+#define TEST_ALL(T) \
+ TEST_TYPE (T, int8_t) \
+ TEST_TYPE (T, int16_t) \
+ TEST_TYPE (T, int32_t) \
+ TEST_TYPE (T, int64_t)
+
+TEST_ALL (DEF_LOOP)
+
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-not {\tmov\tz} } } */
+/* { dg-final { scan-assembler-not {\tmovprfx\t} } } */
+/* { dg-final { scan-assembler-not {\tsel\t} } } */
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_2_run.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_2_run.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,28 @@
+/* { dg-do run { target { aarch64_sve_hw } } } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include "cond_unary_2.c"
+
+#define N 99
+
+#define TEST_LOOP(TYPE, OP) \
+ { \
+ TYPE r[N], a[N], b[N], pred[N]; \
+ for (int i = 0; i < N; ++i) \
+ { \
+ a[i] = (i & 1 ? i : 3 * i) * (i % 3 == 0 ? 1 : -1); \
+ b[i] = (i % 9) * (i % 7 + 1); \
+ pred[i] = (i % 7 < 4); \
+ asm volatile ("" ::: "memory"); \
+ } \
+ test_##TYPE##_##OP (r, a, b, pred, N); \
+ for (int i = 0; i < N; ++i) \
+ if (r[i] != (pred[i] ? OP (a[i]) : b[i])) \
+ __builtin_abort (); \
+ }
+
+int main ()
+{
+ TEST_ALL (TEST_LOOP)
+ return 0;
+}
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_3.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_3.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,43 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include <stdint.h>
+
+#define abs(A) ((A) < 0 ? -(A) : (A))
+#define neg(A) (-(A))
+
+#define DEF_LOOP(TYPE, OP) \
+ void __attribute__ ((noipa)) \
+ test_##TYPE##_##OP (TYPE *__restrict r, TYPE *__restrict a, \
+ TYPE *__restrict pred, int n) \
+ { \
+ for (int i = 0; i < n; ++i) \
+ r[i] = pred[i] ? OP (a[i]) : 5; \
+ }
+
+#define TEST_TYPE(T, TYPE) \
+ T (TYPE, abs) \
+ T (TYPE, neg)
+
+#define TEST_ALL(T) \
+ TEST_TYPE (T, int8_t) \
+ TEST_TYPE (T, int16_t) \
+ TEST_TYPE (T, int32_t) \
+ TEST_TYPE (T, int64_t)
+
+TEST_ALL (DEF_LOOP)
+
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-times {\tmovprfx\tz[0-9]+, z[0-9]+\n} 8 } } */
+
+/* { dg-final { scan-assembler-not {\tmov\tz[^\n]*z} } } */
+/* { dg-final { scan-assembler-not {\tsel\t} } } */
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_3_run.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_3_run.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,27 @@
+/* { dg-do run { target { aarch64_sve_hw } } } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include "cond_unary_3.c"
+
+#define N 99
+
+#define TEST_LOOP(TYPE, OP) \
+ { \
+ TYPE r[N], a[N], pred[N]; \
+ for (int i = 0; i < N; ++i) \
+ { \
+ a[i] = (i & 1 ? i : 3 * i) * (i % 3 == 0 ? 1 : -1); \
+ pred[i] = (i % 7 < 4); \
+ asm volatile ("" ::: "memory"); \
+ } \
+ test_##TYPE##_##OP (r, a, pred, N); \
+ for (int i = 0; i < N; ++i) \
+ if (r[i] != (pred[i] ? OP (a[i]) : 5)) \
+ __builtin_abort (); \
+ }
+
+int main ()
+{
+ TEST_ALL (TEST_LOOP)
+ return 0;
+}
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_4.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_4.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,47 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include <stdint.h>
+
+#define abs(A) ((A) < 0 ? -(A) : (A))
+#define neg(A) (-(A))
+
+#define DEF_LOOP(TYPE, OP) \
+ void __attribute__ ((noipa)) \
+ test_##TYPE##_##OP (TYPE *__restrict r, TYPE *__restrict a, \
+ TYPE *__restrict pred, int n) \
+ { \
+ for (int i = 0; i < n; ++i) \
+ r[i] = pred[i] ? OP (a[i]) : 0; \
+ }
+
+#define TEST_TYPE(T, TYPE) \
+ T (TYPE, abs) \
+ T (TYPE, neg)
+
+#define TEST_ALL(T) \
+ TEST_TYPE (T, int8_t) \
+ TEST_TYPE (T, int16_t) \
+ TEST_TYPE (T, int32_t) \
+ TEST_TYPE (T, int64_t)
+
+TEST_ALL (DEF_LOOP)
+
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tabs\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.b, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.h, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.s, p[0-7]/m,} 1 } } */
+/* { dg-final { scan-assembler-times {\tneg\tz[0-9]+\.d, p[0-7]/m,} 1 } } */
+
+/* Really we should be able to use MOVPRFX /z here, but at the moment
+ we're relying on combine to merge a SEL and an arithmetic operation,
+ and the SEL doesn't allow the "false" value to be zero when the "true"
+ value is a register. */
+/* { dg-final { scan-assembler-times {\tmovprfx\tz[0-9]+, z[0-9]+\n} 8 } } */
+
+/* { dg-final { scan-assembler-not {\tmov\tz[^\n]*z} } } */
+/* { dg-final { scan-assembler-not {\tsel\t} } } */
Index: gcc/testsuite/gcc.target/aarch64/sve/cond_unary_4_run.c
===================================================================
--- /dev/null 2019-07-30 08:53:31.317691683 +0100
+++ gcc/testsuite/gcc.target/aarch64/sve/cond_unary_4_run.c 2019-08-14
11:47:53.151171700 +0100
@@ -0,0 +1,27 @@
+/* { dg-do run { target { aarch64_sve_hw } } } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+#include "cond_unary_4.c"
+
+#define N 99
+
+#define TEST_LOOP(TYPE, OP) \
+ { \
+ TYPE r[N], a[N], pred[N]; \
+ for (int i = 0; i < N; ++i) \
+ { \
+ a[i] = (i & 1 ? i : 3 * i) * (i % 3 == 0 ? 1 : -1); \
+ pred[i] = (i % 7 < 4); \
+ asm volatile ("" ::: "memory"); \
+ } \
+ test_##TYPE##_##OP (r, a, pred, N); \
+ for (int i = 0; i < N; ++i) \
+ if (r[i] != (pred[i] ? OP (a[i]) : 0)) \
+ __builtin_abort (); \
+ }
+
+int main ()
+{
+ TEST_ALL (TEST_LOOP)
+ return 0;
+}
