Hi all,
This patch adds the ARMv8.6 Extension ACLE intrinsics for the bfloat bfdot
operation.
The functions are declared in arm_neon.h with the armv8.2-a+bf16 target option
as required.
RTL patterns are defined to generate assembler.
Tests added to verify expected assembly and perform adequate lane checks.
This patch depends on:
https://gcc.gnu.org/ml/gcc-patches/2019-12/msg00857.html
for testuite effective_target update and on:
https://gcc.gnu.org/ml/gcc-patches/2019-12/msg01323.html
https://gcc.gnu.org/ml/gcc-patches/2019-12/msg01324.html
for back-end Bfloat enablement.
Cheers,
Stam
gcc/ChangeLog:
2019-11-04 Stam Markianos-Wright <stam.markianos-wri...@arm.com>
* config/aarch64/aarch64-simd-builtins.def (aarch64_bfdot,
aarch64_bfdot_lane, aarch64_bfdot_laneq): New.
* config/aarch64/aarch64-simd.md
(aarch64_bfdot, aarch64_bfdot_lane): New.
* config/aarch64/arm_neon.h (vbfdot_f32, vbfdotq_f32, vbfdot_lane_f32,
vbfdotq_lane_f32, vbfdot_laneq_f32, vbfdotq_laneq_f32): New.
* config/aarch64/iterators.md (UNSPEC_BFDOT, VBF, isquadop, Vbfdottype,
VBFMLA_W): New.
gcc/testsuite/ChangeLog:
2019-11-04 Stam Markianos-Wright <stam.markianos-wri...@arm.com>
* gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-1.c: New.
* gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-2.c: New.
* gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-3.c: New.
diff --git a/gcc/config/aarch64/aarch64-simd-builtins.def b/gcc/config/aarch64/aarch64-simd-builtins.def
index f4ca35a59704c761fe2ac2b6d401fff7c8aba80d..6c5b61c37bcb340f963861723c6e365e32f6ca95 100644
--- a/gcc/config/aarch64/aarch64-simd-builtins.def
+++ b/gcc/config/aarch64/aarch64-simd-builtins.def
@@ -682,3 +682,8 @@
BUILTIN_VSFDF (UNOP, frint32x, 0)
BUILTIN_VSFDF (UNOP, frint64z, 0)
BUILTIN_VSFDF (UNOP, frint64x, 0)
+
+ /* Implemented by aarch64_bfdot{_lane}{q}<mode>. */
+ VAR2 (TERNOP, bfdot, 0, v2sf, v4sf)
+ VAR2 (QUADOP_LANE_PAIR, bfdot_lane, 0, v2sf, v4sf)
+ VAR2 (QUADOP_LANE_PAIR, bfdot_laneq, 0, v2sf, v4sf)
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index c4858ab7cffd786066646a5cd95a168311990b76..bdc26c190610580e57e9749804b7729ee4e34793 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -7027,3 +7027,37 @@
"xtn\t%0.<Vntype>, %1.<Vtype>"
[(set_attr "type" "neon_shift_imm_narrow_q")]
)
+
+(define_insn "aarch64_bfdot<mode>"
+ [(set (match_operand:VDQSF 0 "register_operand" "=w")
+ (plus:VDQSF (match_operand:VDQSF 1 "register_operand" "0")
+ (unspec:VDQSF [(match_operand:<VBFMLA_W> 2
+ "register_operand" "w")
+ (match_operand:<VBFMLA_W> 3
+ "register_operand" "w")]
+ UNSPEC_BFDOT)))]
+ "TARGET_BF16_SIMD"
+ "bfdot\t%0.<Vtype>, %2.<Vbfdottype>, %3.<Vbfdottype>"
+ [(set_attr "type" "neon_dot<q>")]
+)
+
+
+(define_insn "aarch64_bfdot_lane<VBF:isquadop><VDQSF:mode>"
+ [(set (match_operand:VDQSF 0 "register_operand" "=w")
+ (plus:VDQSF (match_operand:VDQSF 1 "register_operand" "0")
+ (unspec:VDQSF [(match_operand:<VDQSF:VBFMLA_W> 2
+ "register_operand" "w")
+ (match_operand: VBF 3
+ "register_operand" "w")
+ (match_operand:SI 4
+ "const_int_operand" "n")]
+ UNSPEC_BFDOT)))]
+ "TARGET_BF16_SIMD"
+{
+ int nunits = GET_MODE_NUNITS (<VBF:MODE>mode).to_constant ();
+ int lane = INTVAL (operands[4]);
+ operands[4] = gen_int_mode (ENDIAN_LANE_N (nunits / 2, lane), SImode);
+ return "bfdot\t%0.<VDQSF:Vtype>, %2.<VDQSF:Vbfdottype>, %3.2h[%4]";
+}
+ [(set_attr "type" "neon_dot<VDQSF:q>")]
+)
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index 5996df0a612caff3c881fc15b0aa12b8f91a193b..0357d97cc4143c3a9c56260d9a9cc24138afc049 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -34612,6 +34612,57 @@ vrnd64xq_f64 (float64x2_t __a)
#include "arm_bf16.h"
+#pragma GCC push_options
+#pragma GCC target ("arch=armv8.2-a+bf16")
+
+__extension__ extern __inline float32x2_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vbfdot_f32 (float32x2_t __r, bfloat16x4_t __a, bfloat16x4_t __b)
+{
+ return __builtin_aarch64_bfdotv2sf (__r, __a, __b);
+}
+
+__extension__ extern __inline float32x4_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vbfdotq_f32 (float32x4_t __r, bfloat16x8_t __a, bfloat16x8_t __b)
+{
+ return __builtin_aarch64_bfdotv4sf (__r, __a, __b);
+}
+
+__extension__ extern __inline float32x2_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vbfdot_lane_f32 \
+ (float32x2_t __r, bfloat16x4_t __a, bfloat16x4_t __b, const int __index)
+{
+ return __builtin_aarch64_bfdot_lanev2sf (__r, __a, __b, __index);
+}
+
+__extension__ extern __inline float32x4_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vbfdotq_lane_f32 \
+ (float32x4_t __r, bfloat16x8_t __a, bfloat16x4_t __b, const int __index)
+{
+ return __builtin_aarch64_bfdot_lanev4sf (__r, __a, __b, __index);
+}
+
+__extension__ extern __inline float32x2_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vbfdot_laneq_f32 \
+ (float32x2_t __r, bfloat16x4_t __a, bfloat16x8_t __b, const int __index)
+{
+ return __builtin_aarch64_bfdot_laneqv2sf (__r, __a, __b, __index);
+}
+
+__extension__ extern __inline float32x4_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vbfdotq_laneq_f32 \
+ (float32x4_t __r, bfloat16x8_t __a, bfloat16x8_t __b, const int __index)
+{
+ return __builtin_aarch64_bfdot_laneqv4sf (__r, __a, __b, __index);
+}
+
+#pragma GCC pop_options
+
#undef __aarch64_vget_lane_any
#undef __aarch64_vdup_lane_any
diff --git a/gcc/config/aarch64/iterators.md b/gcc/config/aarch64/iterators.md
index 9480efef47c1865867148bd43dbf10faf227f5d0..4645e481b864d505c0d2de2d0bae776982f2c823 100644
--- a/gcc/config/aarch64/iterators.md
+++ b/gcc/config/aarch64/iterators.md
@@ -120,6 +120,9 @@
;; Quad vector with only 2 element modes.
(define_mode_iterator VQ_2E [V2DI V2DF])
+;; BFmode vector modes.
+(define_mode_iterator VBF [V4BF V8BF])
+
;; This mode iterator allows :P to be used for patterns that operate on
;; addresses in different modes. In LP64, only DI will match, while in
;; ILP32, either can match.
@@ -673,6 +676,7 @@
UNSPEC_UMULHS ; Used in aarch64-sve2.md.
UNSPEC_UMULHRS ; Used in aarch64-sve2.md.
UNSPEC_ASRD ; Used in aarch64-sve.md.
+ UNSPEC_BFDOT ; Used in aarch64-simd.md.
])
;; ------------------------------------------------------------------
@@ -729,6 +733,8 @@
(define_mode_attr FCVT_CHANGE_MODE [(SI "DF") (DI "SF")])
+(define_mode_attr isquadop [(V4BF "") (V8BF "q")])
+
;; For scalar usage of vector/FP registers
(define_mode_attr v [(QI "b") (HI "h") (SI "s") (DI "d")
(HF "h") (SF "s") (DF "d")
@@ -1310,6 +1316,9 @@
;; Register suffix for DOTPROD input types from the return type.
(define_mode_attr Vdottype [(V2SI "8b") (V4SI "16b")])
+;; Register suffix for BFDOT input types from the return type.
+(define_mode_attr Vbfdottype [(V2SF "4h") (V4SF "8h")])
+
;; Sum of lengths of instructions needed to move vector registers of a mode.
(define_mode_attr insn_count [(OI "8") (CI "12") (XI "16")])
@@ -1320,6 +1329,9 @@
;; Width of 2nd and 3rd arguments to fp16 vector multiply add/sub
(define_mode_attr VFMLA_W [(V2SF "V4HF") (V4SF "V8HF")])
+;; Width of 2nd and 3rd arguments to bf16 vector multiply add/sub
+(define_mode_attr VBFMLA_W [(V2SF "V4BF") (V4SF "V8BF")])
+
(define_mode_attr VFMLA_SEL_W [(V2SF "V2HF") (V4SF "V4HF")])
(define_mode_attr f16quad [(V2SF "") (V4SF "q")])
diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-1.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..62ac715c2a9c4468eb7c143464390dbf1144d6d6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-1.c
@@ -0,0 +1,80 @@
+/* { dg-do assemble { target { aarch64*-*-* } } } */
+/* { dg-require-effective-target arm_v8_2a_bf16_neon_ok } */
+/* { dg-add-options arm_v8_2a_bf16_neon } */
+/* { dg-additional-options "--save-temps" } */
+/* { dg-final { check-function-bodies "**" "" "-DCHECK_ASM" } } */
+
+#include <arm_neon.h>
+
+/*
+**ufoo:
+** ...
+** bfdot\tv[0-9]+.2s, v[0-9]+.4h, v[0-9]+.4h
+** ...
+** ret
+*/
+float32x2_t ufoo(float32x2_t r, bfloat16x4_t x, bfloat16x4_t y)
+{
+ return vbfdot_f32 (r, x, y);
+}
+
+/*
+**ufooq:
+** ...
+** bfdot\tv[0-9]+.4s, v[0-9]+.8h, v[0-9]+.8h
+** ...
+** ret
+*/
+float32x4_t ufooq(float32x4_t r, bfloat16x8_t x, bfloat16x8_t y)
+{
+ return vbfdotq_f32 (r, x, y);
+}
+
+/*
+**ufoo_lane:
+** ...
+** bfdot\tv[0-9]+.2s, v[0-9]+.4h, v[0-9]+.2h\[0\]
+** ...
+** ret
+*/
+float32x2_t ufoo_lane(float32x2_t r, bfloat16x4_t x, bfloat16x4_t y)
+{
+ return vbfdot_lane_f32 (r, x, y, 0);
+}
+
+/*
+**ufooq_laneq:
+** ...
+** bfdot\tv[0-9]+.4s, v[0-9]+.8h, v[0-9]+.2h\[2\]
+** ...
+** ret
+*/
+float32x4_t ufooq_laneq(float32x4_t r, bfloat16x8_t x, bfloat16x8_t y)
+{
+ return vbfdotq_laneq_f32 (r, x, y, 2);
+}
+
+/*
+**ufoo_laneq:
+** ...
+** bfdot\tv[0-9]+.2s, v[0-9]+.4h, v[0-9]+.2h\[3\]
+** ...
+** ret
+*/
+float32x2_t ufoo_laneq(float32x2_t r, bfloat16x4_t x, bfloat16x8_t y)
+{
+ return vbfdot_laneq_f32 (r, x, y, 3);
+}
+
+/*
+**ufooq_lane:
+** ...
+** bfdot\tv[0-9]+.4s, v[0-9]+.8h, v[0-9]+.2h\[1\]
+** ...
+** ret
+*/
+float32x4_t ufooq_lane(float32x4_t r, bfloat16x8_t x, bfloat16x4_t y)
+{
+ return vbfdotq_lane_f32 (r, x, y, 1);
+}
+
diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-2.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..ae910bbdc0759e7bdd40566ef211f4f83b411792
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-2.c
@@ -0,0 +1,80 @@
+/* { dg-do assemble { target { aarch64*-*-* } } } */
+/* { dg-require-effective-target arm_v8_2a_bf16_neon_ok } */
+/* { dg-add-options arm_v8_2a_bf16_neon } */
+/* { dg-additional-options "-mbig-endian --save-temps" } */
+/* { dg-final { check-function-bodies "**" "" "-DCHECK_ASM" } } */
+
+#include <arm_neon.h>
+
+/*
+**ufoo:
+** ...
+** bfdot\tv[0-9]+.2s, v[0-9]+.4h, v[0-9]+.4h
+** ...
+** ret
+*/
+float32x2_t ufoo(float32x2_t r, bfloat16x4_t x, bfloat16x4_t y)
+{
+ return vbfdot_f32 (r, x, y);
+}
+
+/*
+**ufooq:
+** ...
+** bfdot\tv[0-9]+.4s, v[0-9]+.8h, v[0-9]+.8h
+** ...
+** ret
+*/
+float32x4_t ufooq(float32x4_t r, bfloat16x8_t x, bfloat16x8_t y)
+{
+ return vbfdotq_f32 (r, x, y);
+}
+
+/*
+**ufoo_lane:
+** ...
+** bfdot\tv[0-9]+.2s, v[0-9]+.4h, v[0-9]+.2h\[0\]
+** ...
+** ret
+*/
+float32x2_t ufoo_lane(float32x2_t r, bfloat16x4_t x, bfloat16x4_t y)
+{
+ return vbfdot_lane_f32 (r, x, y, 0);
+}
+
+/*
+**ufooq_laneq:
+** ...
+** bfdot\tv[0-9]+.4s, v[0-9]+.8h, v[0-9]+.2h\[2\]
+** ...
+** ret
+*/
+float32x4_t ufooq_laneq(float32x4_t r, bfloat16x8_t x, bfloat16x8_t y)
+{
+ return vbfdotq_laneq_f32 (r, x, y, 2);
+}
+
+/*
+**ufoo_laneq:
+** ...
+** bfdot\tv[0-9]+.2s, v[0-9]+.4h, v[0-9]+.2h\[3\]
+** ...
+** ret
+*/
+float32x2_t ufoo_laneq(float32x2_t r, bfloat16x4_t x, bfloat16x8_t y)
+{
+ return vbfdot_laneq_f32 (r, x, y, 3);
+}
+
+/*
+**ufooq_lane:
+** ...
+** bfdot\tv[0-9]+.4s, v[0-9]+.8h, v[0-9]+.2h\[1\]
+** ...
+** ret
+*/
+float32x4_t ufooq_lane(float32x4_t r, bfloat16x8_t x, bfloat16x4_t y)
+{
+ return vbfdotq_lane_f32 (r, x, y, 1);
+}
+
diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-3.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-3.c
new file mode 100644
index 0000000000000000000000000000000000000000..607126203b00213d94471a1adefe16f265104af8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/bfdot-compile-3.c
@@ -0,0 +1,28 @@
+/* { dg-do assemble { target { aarch64*-*-* } } } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-require-effective-target arm_v8_2a_bf16_neon_ok } */
+/* { dg-add-options arm_v8_2a_bf16_neon } */
+/* { dg-additional-options "--save-temps" } */
+
+#include <arm_neon.h>
+
+float32x2_t ufoo_lane(float32x2_t r, bfloat16x4_t x, bfloat16x4_t y)
+{
+ return vbfdot_lane_f32 (r, x, y, -1); /* { dg-error {lane -1 out of range 0 - 1} "" { target *-*-* } 0 } */
+}
+
+float32x4_t ufooq_laneq(float32x4_t r, bfloat16x8_t x, bfloat16x8_t y)
+{
+ return vbfdotq_laneq_f32 (r, x, y, -1); /* { dg-error {lane -1 out of range 0 - 3} "" { target *-*-* } 0 } */
+}
+
+float32x2_t ufoo_laneq(float32x2_t r, bfloat16x4_t x, bfloat16x8_t y)
+{
+ return vbfdot_laneq_f32 (r, x, y, 4); /* { dg-error {lane 4 out of range 0 - 3} "" { target *-*-* } 0 } */
+}
+
+float32x4_t ufooq_lane(float32x4_t r, bfloat16x8_t x, bfloat16x4_t y)
+{
+ return vbfdotq_lane_f32 (r, x, y, 2); /* { dg-error {lane 2 out of range 0 - 1} "" { target *-*-* } 0 } */
+}
+
