+2017-10-16 Tamar Christina <tamar.christina@arm.com>
+
+ * config/arm/arm-builtins.c (arm_unsigned_uternop_qualifiers): New.
+ (UTERNOP_QUALIFIERS, arm_umac_lane_qualifiers, UMAC_LANE_QUALIFIERS): New.
+ * config/arm/arm_neon_builtins.def (sdot, udot, sdot_lane, udot_lane): new.
+ * config/arm/iterators.md (DOTPROD, VSI2QI, vsi2qi): New.
+ (UNSPEC_DOT_S, UNSPEC_DOT_U, opsuffix): New.
+ * config/arm/neon.md (neon_<sup>dot<vsi2qi>): New.
+ (neon_<sup>dot_lane<vsi2qi>, <sup>dot_prod<vsi2qi>): New.
+ * config/arm/types.md (neon_dot, neon_dot_q): New.
+ * config/arm/unspecs.md (sup): Add UNSPEC_DOT_S, UNSPEC_DOT_U.
+
2017-10-16 Tamar Christina <tamar.christina@arm.com>
* config/arm/arm.h (TARGET_DOTPROD): New.
= { qualifier_none, qualifier_none, qualifier_none, qualifier_none };
#define TERNOP_QUALIFIERS (arm_ternop_qualifiers)
+/* unsigned T (unsigned T, unsigned T, unsigned T). */
+static enum arm_type_qualifiers
+arm_unsigned_uternop_qualifiers[SIMD_MAX_BUILTIN_ARGS]
+ = { qualifier_unsigned, qualifier_unsigned, qualifier_unsigned,
+ qualifier_unsigned };
+#define UTERNOP_QUALIFIERS (arm_unsigned_uternop_qualifiers)
+
/* T (T, immediate). */
static enum arm_type_qualifiers
arm_binop_imm_qualifiers[SIMD_MAX_BUILTIN_ARGS]
qualifier_none, qualifier_lane_index };
#define MAC_LANE_QUALIFIERS (arm_mac_lane_qualifiers)
+/* unsigned T (unsigned T, unsigned T, unsigend T, lane index). */
+static enum arm_type_qualifiers
+arm_umac_lane_qualifiers[SIMD_MAX_BUILTIN_ARGS]
+ = { qualifier_unsigned, qualifier_unsigned, qualifier_unsigned,
+ qualifier_unsigned, qualifier_lane_index };
+#define UMAC_LANE_QUALIFIERS (arm_umac_lane_qualifiers)
+
/* T (T, T, immediate). */
static enum arm_type_qualifiers
arm_ternop_imm_qualifiers[SIMD_MAX_BUILTIN_ARGS]
v8qi, v4hi, v4hf, v2si, v2sf, di, v16qi, v8hi, v8hf, v4si, v4sf)
VAR9 (STORE1LANE, vst4_lane,
v8qi, v4hi, v4hf, v2si, v2sf, v8hi, v8hf, v4si, v4sf)
+VAR2 (TERNOP, sdot, v8qi, v16qi)
+VAR2 (UTERNOP, udot, v8qi, v16qi)
+VAR2 (MAC_LANE, sdot_lane, v8qi, v16qi)
+VAR2 (UMAC_LANE, udot_lane, v8qi, v16qi)
(define_int_iterator VFM_LANE_AS [UNSPEC_VFMA_LANE UNSPEC_VFMS_LANE])
+(define_int_iterator DOTPROD [UNSPEC_DOT_S UNSPEC_DOT_U])
+
;;----------------------------------------------------------------------------
;; Mode attributes
;;----------------------------------------------------------------------------
(define_mode_attr pf [(V8QI "p") (V16QI "p") (V2SF "f") (V4SF "f")])
+(define_mode_attr VSI2QI [(V2SI "V8QI") (V4SI "V16QI")])
+(define_mode_attr vsi2qi [(V2SI "v8qi") (V4SI "v16qi")])
+
;;----------------------------------------------------------------------------
;; Code attributes
;;----------------------------------------------------------------------------
(UNSPEC_VSRA_S_N "s") (UNSPEC_VSRA_U_N "u")
(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")
])
(define_int_attr vcvth_op
(define_int_attr mrrc [(VUNSPEC_MRRC "mrrc") (VUNSPEC_MRRC2 "mrrc2")])
(define_int_attr MRRC [(VUNSPEC_MRRC "MRRC") (VUNSPEC_MRRC2 "MRRC2")])
+
+(define_int_attr opsuffix [(UNSPEC_DOT_S "s8")
+ (UNSPEC_DOT_U "u8")])
DONE;
})
+;; These instructions map to the __builtins for the Dot Product operations.
+(define_insn "neon_<sup>dot<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")]
+ DOTPROD)))]
+ "TARGET_DOTPROD"
+ "v<sup>dot.<opsuffix>\\t%<V_reg>0, %<V_reg>2, %<V_reg>3"
+ [(set_attr "type" "neon_dot")]
+)
+
+;; These instructions map to the __builtins for the Dot Product
+;; indexed operations.
+(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)))]
+ "TARGET_DOTPROD"
+ {
+ operands[4]
+ = GEN_INT (NEON_ENDIAN_LANE_N (V8QImode, INTVAL (operands[4])));
+ return "v<sup>dot.<opsuffix>\\t%<V_reg>0, %<V_reg>2, %P3[%c4]";
+ }
+ [(set_attr "type" "neon_dot")]
+)
+
+;; 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.
+;; Given the following pattern
+;;
+;; for (i=0; i<len; i++) {
+;; c = a[i] * b[i];
+;; r += c;
+;; }
+;; return result;
+;;
+;; This can be auto-vectorized to
+;; r = a[0]*b[0] + a[1]*b[1] + a[2]*b[2] + a[3]*b[3];
+;;
+;; given enough iterations. However the vectorizer can keep unrolling the loop
+;; r += a[4]*b[4] + a[5]*b[5] + a[6]*b[6] + a[7]*b[7];
+;; r += a[8]*b[8] + a[9]*b[9] + a[10]*b[10] + a[11]*b[11];
+;; ...
+;;
+;; and so the vectorizer provides r, in which the result has to be accumulated.
+(define_expand "<sup>dot_prod<vsi2qi>"
+ [(set (match_operand:VCVTI 0 "register_operand")
+ (plus:VCVTI (unspec:VCVTI [(match_operand:<VSI2QI> 1
+ "register_operand")
+ (match_operand:<VSI2QI> 2
+ "register_operand")]
+ DOTPROD)
+ (match_operand:VCVTI 3 "register_operand")))]
+ "TARGET_DOTPROD"
+{
+ emit_insn (
+ gen_neon_<sup>dot<vsi2qi> (operands[3], operands[3], operands[1],
+ operands[2]));
+ emit_insn (gen_rtx_SET (operands[0], operands[3]));
+ DONE;
+})
+
(define_expand "neon_copysignf<mode>"
[(match_operand:VCVTF 0 "register_operand")
(match_operand:VCVTF 1 "register_operand")
; neon_cls_q
; neon_cnt
; neon_cnt_q
+; neon_dot
+; neon_dot_q
; neon_ext
; neon_ext_q
; neon_rbit
\
neon_abs,\
neon_abs_q,\
+ neon_dot,\
+ neon_dot_q,\
neon_neg,\
neon_neg_q,\
neon_qneg,\
neon_sub, neon_sub_q, neon_sub_widen, neon_sub_long, neon_qsub,\
neon_qsub_q, neon_sub_halve, neon_sub_halve_q,\
neon_sub_halve_narrow_q,\
- neon_abs, neon_abs_q, neon_neg, neon_neg_q, neon_qneg,\
- neon_qneg_q, neon_qabs, neon_qabs_q, neon_abd, neon_abd_q,\
+ neon_abs, neon_abs_q, neon_dot, neon_dot_q, neon_neg, neon_neg_q,\
+ neon_qneg, neon_qneg_q, neon_qabs, neon_qabs_q, neon_abd, neon_abd_q,\
neon_abd_long, neon_minmax, neon_minmax_q, neon_compare,\
neon_compare_q, neon_compare_zero, neon_compare_zero_q,\
neon_arith_acc, neon_arith_acc_q, neon_reduc_add,\
UNSPEC_VRNDN
UNSPEC_VRNDP
UNSPEC_VRNDX
+ UNSPEC_DOT_S
+ UNSPEC_DOT_U
])
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