Hi all,
This patch adds the ARMv8.6 Extension ACLE intrinsics for dot product
operations (vector/by element) to the ARM back-end.
These are:
usdot (vector), <us/su>dot (by element).
The functions are optional from ARMv8.2-a as -march=armv8.2-a+i8mm and
for ARM they remain optional as of ARMv8.6-a.
The functions are declared in arm_neon.h, RTL patterns are defined to
generate assembler and tests are added to verify and perform adequate
checks.
Regression testing on arm-none-eabi passed successfully.
This patch depends on:
https://gcc.gnu.org/ml/gcc-patches/2019-11/msg02195.html
for ARM CLI updates, and on:
https://gcc.gnu.org/ml/gcc-patches/2019-12/msg00857.html
for testsuite effective_target update.
Ok for trunk?
Cheers,
Stam
ACLE documents are at https://developer.arm.com/docs/101028/latest
ISA documents are at https://developer.arm.com/docs/ddi0596/latest
PS. I don't have commit rights, so if someone could commit on my behalf,
that would be great :)
gcc/ChangeLog:
2019-11-28 Stam Markianos-Wright <stam.markianos-wri...@arm.com>
* config/arm/arm-builtins.c (enum arm_type_qualifiers):
(USTERNOP_QUALIFIERS): New define.
(USMAC_LANE_QUADTUP_QUALIFIERS): New define.
(SUMAC_LANE_QUADTUP_QUALIFIERS): New define.
(arm_expand_builtin_args):
Add case ARG_BUILTIN_LANE_QUADTUP_INDEX.
(arm_expand_builtin_1): Add qualifier_lane_quadtup_index.
* config/arm/arm_neon.h (vusdot_s32): New.
(vusdot_lane_s32): New.
(vusdotq_lane_s32): New.
(vsudot_lane_s32): New.
(vsudotq_lane_s32): New.
* config/arm/arm_neon_builtins.def
(usdot,usdot_lane,sudot_lane): New.
* config/arm/iterators.md (DOTPROD_I8MM): New.
(sup, opsuffix): Add <us/su>.
* config/arm/neon.md (neon_usdot, <us/su>dot_lane: New.
* config/arm/unspecs.md (UNSPEC_DOT_US, UNSPEC_DOT_SU): New.
gcc/testsuite/ChangeLog:
2019-12-12 Stam Markianos-Wright <stam.markianos-wri...@arm.com>
* gcc.target/arm/simd/vdot-compile-2-1.c: New test.
* gcc.target/arm/simd/vdot-compile-2-2.c: New test.
* gcc.target/arm/simd/vdot-compile-2-3.c: New test.
* gcc.target/arm/simd/vdot-compile-2-4.c: New test.
diff --git a/gcc/config/arm/arm-builtins.c b/gcc/config/arm/arm-builtins.c
index 2d902d0b325bc1fe5e22831ef8a59a2bb37c1225..a63c1a978fb1d436065ce9f5f082249c4ebf5ade 100644
--- a/gcc/config/arm/arm-builtins.c
+++ b/gcc/config/arm/arm-builtins.c
@@ -86,7 +86,10 @@ enum arm_type_qualifiers
qualifier_const_void_pointer = 0x802,
/* Lane indices selected in pairs - must be within range of previous
argument = a vector. */
- qualifier_lane_pair_index = 0x1000
+ qualifier_lane_pair_index = 0x1000,
+ /* Lane indices selected in quadtuplets - must be within range of previous
+ argument = a vector. */
+ qualifier_lane_quadtup_index = 0x2000
};
/* The qualifier_internal allows generation of a unary builtin from
@@ -122,6 +125,13 @@ arm_unsigned_uternop_qualifiers[SIMD_MAX_BUILTIN_ARGS]
qualifier_unsigned };
#define UTERNOP_QUALIFIERS (arm_unsigned_uternop_qualifiers)
+/* T (T, unsigned T, T). */
+static enum arm_type_qualifiers
+arm_usternop_qualifiers[SIMD_MAX_BUILTIN_ARGS]
+ = { qualifier_none, qualifier_none, qualifier_unsigned,
+ qualifier_none };
+#define USTERNOP_QUALIFIERS (arm_usternop_qualifiers)
+
/* T (T, immediate). */
static enum arm_type_qualifiers
arm_binop_imm_qualifiers[SIMD_MAX_BUILTIN_ARGS]
@@ -176,6 +186,20 @@ arm_umac_lane_qualifiers[SIMD_MAX_BUILTIN_ARGS]
qualifier_unsigned, qualifier_lane_index };
#define UMAC_LANE_QUALIFIERS (arm_umac_lane_qualifiers)
+/* T (T, unsigned T, T, lane index). */
+static enum arm_type_qualifiers
+arm_usmac_lane_quadtup_qualifiers[SIMD_MAX_BUILTIN_ARGS]
+ = { qualifier_none, qualifier_none, qualifier_unsigned,
+ qualifier_none, qualifier_lane_quadtup_index };
+#define USMAC_LANE_QUADTUP_QUALIFIERS (arm_usmac_lane_quadtup_qualifiers)
+
+/* T (T, T, unsigend T, lane index). */
+static enum arm_type_qualifiers
+arm_sumac_lane_quadtup_qualifiers[SIMD_MAX_BUILTIN_ARGS]
+ = { qualifier_none, qualifier_none, qualifier_none,
+ qualifier_unsigned, qualifier_lane_quadtup_index };
+#define SUMAC_LANE_QUADTUP_QUALIFIERS (arm_sumac_lane_quadtup_qualifiers)
+
/* T (T, T, immediate). */
static enum arm_type_qualifiers
arm_ternop_imm_qualifiers[SIMD_MAX_BUILTIN_ARGS]
@@ -2148,6 +2172,7 @@ typedef enum {
ARG_BUILTIN_LANE_INDEX,
ARG_BUILTIN_STRUCT_LOAD_STORE_LANE_INDEX,
ARG_BUILTIN_LANE_PAIR_INDEX,
+ ARG_BUILTIN_LANE_QUADTUP_INDEX,
ARG_BUILTIN_NEON_MEMORY,
ARG_BUILTIN_MEMORY,
ARG_BUILTIN_STOP
@@ -2296,11 +2321,24 @@ arm_expand_builtin_args (rtx target, machine_mode map_mode, int fcode,
if (CONST_INT_P (op[argc]))
{
machine_mode vmode = mode[argc - 1];
- neon_lane_bounds (op[argc], 0, GET_MODE_NUNITS (vmode) / 2, exp);
+ neon_lane_bounds (op[argc], 0,
+ GET_MODE_NUNITS (vmode) / 2, exp);
+ }
+ /* If the lane index isn't a constant then error out. */
+ goto constant_arg;
+
+ case ARG_BUILTIN_LANE_QUADTUP_INDEX:
+ /* Previous argument must be a vector, which this indexes. */
+ gcc_assert (argc > 0);
+ if (CONST_INT_P (op[argc]))
+ {
+ machine_mode vmode = mode[argc - 1];
+ neon_lane_bounds (op[argc], 0,
+ GET_MODE_NUNITS (vmode) / 4, exp);
}
- /* If the lane index isn't a constant then the next
- case will error. */
- /* Fall through. */
+ /* If the lane index isn't a constant then error out. */
+ goto constant_arg;
+
case ARG_BUILTIN_CONSTANT:
constant_arg:
if (!(*insn_data[icode].operand[opno].predicate)
@@ -2464,6 +2502,8 @@ arm_expand_builtin_1 (int fcode, tree exp, rtx target,
args[k] = ARG_BUILTIN_LANE_INDEX;
else if (d->qualifiers[qualifiers_k] & qualifier_lane_pair_index)
args[k] = ARG_BUILTIN_LANE_PAIR_INDEX;
+ else if (d->qualifiers[qualifiers_k] & qualifier_lane_quadtup_index)
+ args[k] = ARG_BUILTIN_LANE_QUADTUP_INDEX;
else if (d->qualifiers[qualifiers_k] & qualifier_struct_load_store_lane_index)
args[k] = ARG_BUILTIN_STRUCT_LOAD_STORE_LANE_INDEX;
else if (d->qualifiers[qualifiers_k] & qualifier_immediate)
diff --git a/gcc/config/arm/arm_neon.h b/gcc/config/arm/arm_neon.h
index 1f200d491d1de3993bc3a682d586da137958ff6b..53602773a341535bfc9ff16dc4ac8f2b999df2ad 100644
--- a/gcc/config/arm/arm_neon.h
+++ b/gcc/config/arm/arm_neon.h
@@ -18738,6 +18738,52 @@ vcmlaq_rot270_laneq_f32 (float32x4_t __r, float32x4_t __a, float32x4_t __b,
return __builtin_neon_vcmla_lane270v4sf (__r, __a, __b, __index);
}
+
+/* AdvSIMD Matrix Multiply-Accumulate and Dot Product intrinsics. */
+#pragma GCC push_options
+#pragma GCC target ("arch=armv8.2-a+i8mm")
+
+__extension__ extern __inline int32x2_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vusdot_s32 (int32x2_t __r, uint8x8_t __a, int8x8_t __b)
+{
+ return __builtin_neon_usdotv8qi_ssus (__r, __a, __b);
+}
+
+__extension__ extern __inline int32x2_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vusdot_lane_s32 (int32x2_t __r, uint8x8_t __a,
+ int8x8_t __b, const int __index)
+{
+ return __builtin_neon_usdot_lanev8qi_ssuss (__r, __a, __b, __index);
+}
+
+__extension__ extern __inline int32x4_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vusdotq_lane_s32 (int32x4_t __r, uint8x16_t __a,
+ int8x8_t __b, const int __index)
+{
+ return __builtin_neon_usdot_lanev16qi_ssuss (__r, __a, __b, __index);
+}
+
+__extension__ extern __inline int32x2_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vsudot_lane_s32 (int32x2_t __r, int8x8_t __a,
+ uint8x8_t __b, const int __index)
+{
+ return __builtin_neon_sudot_lanev8qi_sssus (__r, __a, __b, __index);
+}
+
+__extension__ extern __inline int32x4_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vsudotq_lane_s32 (int32x4_t __r, int8x16_t __a,
+ uint8x8_t __b, const int __index)
+{
+ return __builtin_neon_sudot_lanev16qi_sssus (__r, __a, __b, __index);
+}
+
+#pragma GCC pop_options
+
#pragma GCC pop_options
#endif
diff --git a/gcc/config/arm/arm_neon_builtins.def b/gcc/config/arm/arm_neon_builtins.def
index bcccf93f7fa2750e9006e5856efecbec0fb331b9..7af85ee27bc84b4229633a0337b550e4ef2ec14b 100644
--- a/gcc/config/arm/arm_neon_builtins.def
+++ b/gcc/config/arm/arm_neon_builtins.def
@@ -352,6 +352,10 @@ VAR2 (UTERNOP, udot, v8qi, v16qi)
VAR2 (MAC_LANE, sdot_lane, v8qi, v16qi)
VAR2 (UMAC_LANE, udot_lane, v8qi, v16qi)
+VAR1 (USTERNOP, usdot, v8qi)
+VAR2 (USMAC_LANE_QUADTUP, usdot_lane, v8qi, v16qi)
+VAR2 (SUMAC_LANE_QUADTUP, sudot_lane, v8qi, v16qi)
+
VAR4 (BINOP, vcadd90, v4hf, v2sf, v8hf, v4sf)
VAR4 (BINOP, vcadd270, v4hf, v2sf, v8hf, v4sf)
VAR4 (TERNOP, vcmla0, v2sf, v4sf, v4hf, v8hf)
diff --git a/gcc/config/arm/iterators.md b/gcc/config/arm/iterators.md
index c412851843f4468c2c18bce264288705e076ac50..e58c706f9fb63271d1aadb1498c0b32674838f46 100644
--- a/gcc/config/arm/iterators.md
+++ b/gcc/config/arm/iterators.md
@@ -466,6 +466,8 @@
(define_int_iterator DOTPROD [UNSPEC_DOT_S UNSPEC_DOT_U])
+(define_int_iterator DOTPROD_I8MM [UNSPEC_DOT_US UNSPEC_DOT_SU])
+
(define_int_iterator VFMLHALVES [UNSPEC_VFML_LO UNSPEC_VFML_HI])
(define_int_iterator VCADD [UNSPEC_VCADD90 UNSPEC_VCADD270])
@@ -920,6 +922,7 @@
(UNSPEC_VRSRA_S_N "s") (UNSPEC_VRSRA_U_N "u")
(UNSPEC_VCVTH_S "s") (UNSPEC_VCVTH_U "u")
(UNSPEC_DOT_S "s") (UNSPEC_DOT_U "u")
+ (UNSPEC_DOT_US "us") (UNSPEC_DOT_SU "su")
(UNSPEC_SSAT16 "s") (UNSPEC_USAT16 "u")
])
@@ -1151,6 +1154,9 @@
(define_int_attr MRRC [(VUNSPEC_MRRC "MRRC") (VUNSPEC_MRRC2 "MRRC2")])
(define_int_attr opsuffix [(UNSPEC_DOT_S "s8")
- (UNSPEC_DOT_U "u8")])
+ (UNSPEC_DOT_U "u8")
+ (UNSPEC_DOT_US "s8")
+ (UNSPEC_DOT_SU "u8")
+ ])
(define_int_attr smlaw_op [(UNSPEC_SMLAWB "smlawb") (UNSPEC_SMLAWT "smlawt")])
diff --git a/gcc/config/arm/neon.md b/gcc/config/arm/neon.md
index 6a0ee28efc9aa9f1fba7b5ae031564f40aa095fe..7de31220d5d0712269137bc2c64d90ec9bfdcb2c 100644
--- a/gcc/config/arm/neon.md
+++ b/gcc/config/arm/neon.md
@@ -3279,6 +3279,20 @@
[(set_attr "type" "neon_dot<q>")]
)
+;; These instructions map to the __builtins for the Dot Product operations.
+(define_insn "neon_usdot<vsi2qi>"
+ [(set (match_operand:VCVTI 0 "register_operand" "=w")
+ (plus:VCVTI (match_operand:VCVTI 1 "register_operand" "0")
+ (unspec:VCVTI [(match_operand:<VSI2QI> 2
+ "register_operand" "w")
+ (match_operand:<VSI2QI> 3
+ "register_operand" "w")]
+ UNSPEC_DOT_US)))]
+ "TARGET_I8MM"
+ "vusdot.s8\\t%<V_reg>0, %<V_reg>2, %<V_reg>3"
+ [(set_attr "type" "neon_dot<q>")]
+)
+
;; These instructions map to the __builtins for the Dot Product
;; indexed operations.
(define_insn "neon_<sup>dot_lane<vsi2qi>"
@@ -3298,6 +3312,24 @@
[(set_attr "type" "neon_dot<q>")]
)
+;; These instructions map to the __builtins for the Dot Product
+;; indexed operations in the v8.6 I8MM extension.
+(define_insn "neon_<sup>dot_lane<vsi2qi>"
+ [(set (match_operand:VCVTI 0 "register_operand" "=w")
+ (plus:VCVTI (match_operand:VCVTI 1 "register_operand" "0")
+ (unspec:VCVTI [(match_operand:<VSI2QI> 2
+ "register_operand" "w")
+ (match_operand:V8QI 3 "register_operand" "t")
+ (match_operand:SI 4 "immediate_operand" "i")]
+ DOTPROD_I8MM)))]
+ "TARGET_I8MM"
+ {
+ operands[4] = GEN_INT (INTVAL (operands[4]));
+ return "v<sup>dot.<opsuffix>\\t%<V_reg>0, %<V_reg>2, %P3[%c4]";
+ }
+ [(set_attr "type" "neon_dot<q>")]
+)
+
;; These expands map to the Dot Product optab the vectorizer checks for.
;; The auto-vectorizer expects a dot product builtin that also does an
;; accumulation into the provided register.
diff --git a/gcc/config/arm/unspecs.md b/gcc/config/arm/unspecs.md
index b4196b0e5cd939c3ee5e3f9bd19622fcc963adae..837471f49543d4faa8614bd54f2db8d37991c443 100644
--- a/gcc/config/arm/unspecs.md
+++ b/gcc/config/arm/unspecs.md
@@ -485,6 +485,8 @@
UNSPEC_VRNDX
UNSPEC_DOT_S
UNSPEC_DOT_U
+ UNSPEC_DOT_US
+ UNSPEC_DOT_SU
UNSPEC_VFML_LO
UNSPEC_VFML_HI
UNSPEC_VCADD90
diff --git a/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-1.c b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..862cf3211e71cbf8127f2b0f141c206676bf9bdb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-1.c
@@ -0,0 +1,42 @@
+/* { dg-do assemble { target { arm*-*-* } } } */
+/* { dg-require-effective-target arm_v8_2a_i8mm_ok } */
+/* { dg-add-options arm_v8_2a_i8mm } */
+/* { dg-additional-options "--save-temps" } */
+
+#include <arm_neon.h>
+
+/* Unsigned-Signed Dot Product instructions. */
+
+int32x2_t usfoo (int32x2_t r, uint8x8_t x, int8x8_t y)
+{
+ return vusdot_s32 (r, x, y);
+}
+
+int32x2_t usfoo_lane (int32x2_t r, uint8x8_t x, int8x8_t y)
+{
+ return vusdot_lane_s32 (r, x, y, 0);
+}
+
+int32x4_t usfooq_lane (int32x4_t r, uint8x16_t x, int8x8_t y)
+{
+ return vusdotq_lane_s32 (r, x, y, 1);
+}
+
+/* Signed-Unsigned Dot Product instructions. */
+
+
+int32x2_t sfoo_lane (int32x2_t r, int8x8_t x, uint8x8_t y)
+{
+ return vsudot_lane_s32 (r, x, y, 0);
+}
+
+int32x4_t sfooq_lane (int32x4_t r, int8x16_t x, uint8x8_t y)
+{
+ return vsudotq_lane_s32 (r, x, y, 1);
+}
+
+/* { dg-final { scan-assembler {vusdot\.s8\td[0-9]+, d[0-9]+, d[0-9]+} } } */
+/* { dg-final { scan-assembler {vusdot\.s8\td[0-9]+, d[0-9]+, d[0-9]+\[#?0\]} } } */
+/* { dg-final { scan-assembler {vusdot\.s8\tq[0-9]+, q[0-9]+, d[0-9]+\[#?1\]} } } */
+/* { dg-final { scan-assembler {vsudot\.u8\td[0-9]+, d[0-9]+, d[0-9]+\[#?0\]} } } */
+/* { dg-final { scan-assembler {vsudot\.u8\tq[0-9]+, q[0-9]+, d[0-9]+\[#?1\]} } } */
diff --git a/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-2.c b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..91ecb073fdb5bd4523c9b1e62aed03de5adb820d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-2.c
@@ -0,0 +1,42 @@
+/* { dg-do assemble { target { arm*-*-* } } } */
+/* { dg-require-effective-target arm_v8_2a_i8mm_ok } */
+/* { dg-add-options arm_v8_2a_i8mm } */
+/* { dg-additional-options "-mbig-endian --save-temps" } */
+
+#include <arm_neon.h>
+
+/* Unsigned-Signed Dot Product instructions. */
+
+int32x2_t usfoo (int32x2_t r, uint8x8_t x, int8x8_t y)
+{
+ return vusdot_s32 (r, x, y);
+}
+
+int32x2_t usfoo_lane (int32x2_t r, uint8x8_t x, int8x8_t y)
+{
+ return vusdot_lane_s32 (r, x, y, 0);
+}
+
+int32x4_t usfooq_lane (int32x4_t r, uint8x16_t x, int8x8_t y)
+{
+ return vusdotq_lane_s32 (r, x, y, 1);
+}
+
+/* Signed-Unsigned Dot Product instructions. */
+
+
+int32x2_t sfoo_lane (int32x2_t r, int8x8_t x, uint8x8_t y)
+{
+ return vsudot_lane_s32 (r, x, y, 0);
+}
+
+int32x4_t sfooq_lane (int32x4_t r, int8x16_t x, uint8x8_t y)
+{
+ return vsudotq_lane_s32 (r, x, y, 1);
+}
+
+/* { dg-final { scan-assembler {vusdot\.s8\td[0-9]+, d[0-9]+, d[0-9]+} } } */
+/* { dg-final { scan-assembler {vusdot\.s8\td[0-9]+, d[0-9]+, d[0-9]+\[#?0\]} } } */
+/* { dg-final { scan-assembler {vusdot\.s8\tq[0-9]+, q[0-9]+, d[0-9]+\[#?1\]} } } */
+/* { dg-final { scan-assembler {vsudot\.u8\td[0-9]+, d[0-9]+, d[0-9]+\[#?0\]} } } */
+/* { dg-final { scan-assembler {vsudot\.u8\tq[0-9]+, q[0-9]+, d[0-9]+\[#?1\]} } } */
diff --git a/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-3.c b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-3.c
new file mode 100644
index 0000000000000000000000000000000000000000..e14fe8f4433c9bf4c3347ebf728157bdb54861b2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-3.c
@@ -0,0 +1,21 @@
+/* { dg-do assemble { target { arm*-*-* } } } */
+/* { dg-require-effective-target arm_v8_2a_i8mm_ok } */
+/* { dg-add-options arm_v8_2a_i8mm } */
+/* { dg-additional-options "--save-temps" } */
+
+#include <arm_neon.h>
+
+/* Unsigned-Signed Dot Product instructions. */
+
+int32x2_t usfoo_lane (int32x2_t r, uint8x8_t x, int8x8_t y)
+{
+ /* { dg-error "lane -1 out of range 0 - 1" "" { target *-*-* } 0 } */
+ return vusdot_lane_s32 (r, x, y, -1);
+}
+
+
+int32x4_t usfooq_lane (int32x4_t r, uint8x16_t x, int8x8_t y)
+{
+ /* { dg-error "lane 2 out of range 0 - 1" "" { target *-*-* } 0 } */
+ return vusdotq_lane_s32 (r, x, y, 2);
+}
diff --git a/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-4.c b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..fb7ebb484e1778a1d06611f8c8a639d4c0dcb9a7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/simd/vdot-compile-2-4.c
@@ -0,0 +1,20 @@
+/* { dg-do assemble { target { arm*-*-* } } } */
+/* { dg-require-effective-target arm_v8_2a_i8mm_ok } */
+/* { dg-add-options arm_v8_2a_i8mm } */
+/* { dg-additional-options "--save-temps" } */
+
+#include <arm_neon.h>
+
+/* Signed-Unsigned Dot Product instructions. */
+
+int32x2_t sfoo_lane (int32x2_t r, int8x8_t x, uint8x8_t y)
+{
+ /* { dg-error "lane -1 out of range 0 - 1" "" { target *-*-* } 0 } */
+ return vsudot_lane_s32 (r, x, y, -1);
+}
+
+int32x4_t sfooq_lane (int32x4_t r, int8x16_t x, uint8x8_t y)
+{
+ /* { dg-error "lane 2 out of range 0 - 1" "" { target *-*-* } 0 } */
+ return vsudotq_lane_s32 (r, x, y, 2);
+}
