Hi Richard,
> -----Original Message-----
> From: Richard Sandiford <richard.sandif...@arm.com>
> Sent: 01 October 2020 15:10
> To: gcc-patches@gcc.gnu.org
> Cc: ni...@redhat.com; Richard Earnshaw <richard.earns...@arm.com>;
> Ramana Radhakrishnan <ramana.radhakrish...@arm.com>; Kyrylo
> Tkachov <kyrylo.tkac...@arm.com>
> Subject: [PATCH] arm: Add missing vec_cmp and vcond patterns
>
> This patch does several things at once:
>
> (1) Add vector compare patterns (vec_cmp and vec_cmpu).
>
> (2) Add vector selects between floating-point modes when the
> values being compared are integers (affects vcond and vcondu).
>
> (3) Add vector selects between integer modes when the values being
> compared are floating-point (affects vcond).
>
> (4) Add standalone vector select patterns (vcond_mask).
>
> (5) Tweak the handling of compound comparisons with zeros.
>
> Unfortunately it proved too difficult (for me) to separate this
> out into a series of smaller patches, since everything is so
> inter-related. Defining only some of the new patterns does
> not leave things in a happy state.
>
> The handling of comparisons is mostly taken from the vcond patterns.
> This means that it remains non-compliant with IEEE: “quiet” comparisons
> use signalling instructions. But that shouldn't matter for floats,
> since we require -funsafe-math-optimizations to vectorize for them
> anyway.
>
> It remains the case that comparisons and selects aren't implemented
> at all for HF vectors. Implementing those feels like separate work.
>
> Tested on arm-linux-gnueabihf and arm-eabi (for MVE). OK to install?
>
Ok.
Thanks, this looks good to me.
Kyrill
> Richard
>
>
> gcc/
> PR target/96528
> PR target/97288
> * config/arm/arm-protos.h (arm_expand_vector_compare): Declare.
> (arm_expand_vcond): Likewise.
> * config/arm/arm.c (arm_expand_vector_compare): New function.
> (arm_expand_vcond): Likewise.
> * config/arm/neon.md (vec_cmp<VDQW:mode><v_cmp_result>):
> New pattern.
> (vec_cmpu<VDQW:mode><VDQW:mode>): Likewise.
> (vcond<VDQW:mode><VDQW:mode>): Require operand 5 to be a
> register
> or zero. Use arm_expand_vcond.
> (vcond<V_cvtto><V32:mode>): New pattern.
> (vcondu<VDQIW:mode><VDQIW:mode>): Generalize to...
> (vcondu<VDQW:mode><v_cmp_result): ...this. Require operand 5
> to be a register or zero. Use arm_expand_vcond.
> (vcond_mask_<VDQW:mode><v_cmp_result>): New pattern.
> (neon_vc<cmp_op><mode>, neon_vc<cmp_op><mode>_insn): Add
> "@" marker.
> (neon_vbsl<mode>): Likewise.
> (neon_vc<cmp_op>u<mode>): Reexpress as...
> (@neon_vc<code><mode>): ...this.
>
> gcc/testsuite/
> * lib/target-supports.exp (check_effective_target_vect_cond_mixed):
> Add
> arm neon targets.
> * gcc.target/arm/neon-compare-1.c: New test.
> * gcc.target/arm/neon-compare-2.c: Likewise.
> * gcc.target/arm/neon-compare-3.c: Likewise.
> * gcc.target/arm/neon-compare-4.c: Likewise.
> * gcc.target/arm/neon-compare-5.c: Likewise.
> * gcc.target/arm/neon-vcond-gt.c: Expect comparisons with zero.
> * gcc.target/arm/neon-vcond-ltgt.c: Likewise.
> * gcc.target/arm/neon-vcond-unordered.c: Likewise.
> ---
> gcc/config/arm/arm-protos.h | 2 +
> gcc/config/arm/arm.c | 121 ++++++++
> gcc/config/arm/neon.md | 281 ++++--------------
> gcc/testsuite/gcc.target/arm/neon-compare-1.c | 84 ++++++
> gcc/testsuite/gcc.target/arm/neon-compare-2.c | 45 +++
> gcc/testsuite/gcc.target/arm/neon-compare-3.c | 44 +++
> gcc/testsuite/gcc.target/arm/neon-compare-4.c | 38 +++
> gcc/testsuite/gcc.target/arm/neon-compare-5.c | 37 +++
> gcc/testsuite/gcc.target/arm/neon-vcond-gt.c | 2 +-
> .../gcc.target/arm/neon-vcond-ltgt.c | 3 +-
> .../gcc.target/arm/neon-vcond-unordered.c | 4 +-
> gcc/testsuite/lib/target-supports.exp | 2 +
> 12 files changed, 442 insertions(+), 221 deletions(-)
> create mode 100644 gcc/testsuite/gcc.target/arm/neon-compare-1.c
> create mode 100644 gcc/testsuite/gcc.target/arm/neon-compare-2.c
> create mode 100644 gcc/testsuite/gcc.target/arm/neon-compare-3.c
> create mode 100644 gcc/testsuite/gcc.target/arm/neon-compare-4.c
> create mode 100644 gcc/testsuite/gcc.target/arm/neon-compare-5.c
>
> diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
> index 9bb9c61967b..703d6160c24 100644
> --- a/gcc/config/arm/arm-protos.h
> +++ b/gcc/config/arm/arm-protos.h
> @@ -372,9 +372,11 @@ extern void arm_emit_coreregs_64bit_shift (enum
> rtx_code, rtx, rtx, rtx, rtx,
> extern bool arm_fusion_enabled_p (tune_params::fuse_ops);
> extern bool arm_valid_symbolic_address_p (rtx);
> extern bool arm_validize_comparison (rtx *, rtx *, rtx *);
> +extern bool arm_expand_vector_compare (rtx, rtx_code, rtx, rtx, bool);
> #endif /* RTX_CODE */
>
> extern bool arm_gen_setmem (rtx *);
> +extern void arm_expand_vcond (rtx *, machine_mode);
> extern void arm_expand_vec_perm (rtx target, rtx op0, rtx op1, rtx sel);
>
> extern bool arm_autoinc_modes_ok_p (machine_mode, enum
> arm_auto_incmodes);
> diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
> index 8105b39e7a4..0e23246c27b 100644
> --- a/gcc/config/arm/arm.c
> +++ b/gcc/config/arm/arm.c
> @@ -30634,6 +30634,127 @@ arm_split_atomic_op (enum rtx_code code,
> rtx old_out, rtx new_out, rtx mem,
> arm_post_atomic_barrier (model);
> }
>
>
>
> +/* Expand code to compare vectors OP0 and OP1 using condition CODE.
> + If CAN_INVERT, store either the result or its inverse in TARGET
> + and return true if TARGET contains the inverse. If !CAN_INVERT,
> + always store the result in TARGET, never its inverse.
> +
> + Note that the handling of floating-point comparisons is not
> + IEEE compliant. */
> +
> +bool
> +arm_expand_vector_compare (rtx target, rtx_code code, rtx op0, rtx op1,
> + bool can_invert)
> +{
> + machine_mode cmp_result_mode = GET_MODE (target);
> + machine_mode cmp_mode = GET_MODE (op0);
> +
> + bool inverted;
> + switch (code)
> + {
> + /* For these we need to compute the inverse of the requested
> + comparison. */
> + case UNORDERED:
> + case UNLT:
> + case UNLE:
> + case UNGT:
> + case UNGE:
> + case UNEQ:
> + case NE:
> + code = reverse_condition_maybe_unordered (code);
> + if (!can_invert)
> + {
> + /* Recursively emit the inverted comparison into a temporary
> + and then store its inverse in TARGET. This avoids reusing
> + TARGET (which for integer NE could be one of the inputs). */
> + rtx tmp = gen_reg_rtx (cmp_result_mode);
> + if (arm_expand_vector_compare (tmp, code, op0, op1, true))
> + gcc_unreachable ();
> + emit_insn (gen_rtx_SET (target, gen_rtx_NOT (cmp_result_mode,
> tmp)));
> + return false;
> + }
> + inverted = true;
> + break;
> +
> + default:
> + inverted = false;
> + break;
> + }
> +
> + switch (code)
> + {
> + /* These are natively supported for zero comparisons, but otherwise
> + require the operands to be swapped. */
> + case LE:
> + case LT:
> + if (op1 != CONST0_RTX (cmp_mode))
> + {
> + code = swap_condition (code);
> + std::swap (op0, op1);
> + }
> + /* Fall through. */
> +
> + /* These are natively supported for both register and zero operands. */
> + case EQ:
> + case GE:
> + case GT:
> + emit_insn (gen_neon_vc (code, cmp_mode, target, op0, op1));
> + return inverted;
> +
> + /* These are natively supported for register operands only.
> + Comparisons with zero aren't useful and should be folded
> + or canonicalized by target-independent code. */
> + case GEU:
> + case GTU:
> + emit_insn (gen_neon_vc (code, cmp_mode, target,
> + op0, force_reg (cmp_mode, op1)));
> + return inverted;
> +
> + /* These require the operands to be swapped and likewise do not
> + support comparisons with zero. */
> + case LEU:
> + case LTU:
> + emit_insn (gen_neon_vc (swap_condition (code), cmp_mode,
> + target, force_reg (cmp_mode, op1), op0));
> + return inverted;
> +
> + /* These need a combination of two comparisons. */
> + case LTGT:
> + case ORDERED:
> + {
> + /* Operands are LTGT iff (a > b || a > b).
> + Operands are ORDERED iff (a > b || a <= b). */
> + rtx gt_res = gen_reg_rtx (cmp_result_mode);
> + rtx alt_res = gen_reg_rtx (cmp_result_mode);
> + rtx_code alt_code = (code == LTGT ? LT : LE);
> + if (arm_expand_vector_compare (gt_res, GT, op0, op1, true)
> + || arm_expand_vector_compare (alt_res, alt_code, op0, op1,
> true))
> + gcc_unreachable ();
> + emit_insn (gen_rtx_SET (target, gen_rtx_IOR (cmp_result_mode,
> + gt_res, alt_res)));
> + return inverted;
> + }
> +
> + default:
> + gcc_unreachable ();
> + }
> +}
> +
> +/* Expand a vcond or vcondu pattern with operands OPERANDS.
> + CMP_RESULT_MODE is the mode of the comparison result. */
> +
> +void
> +arm_expand_vcond (rtx *operands, machine_mode cmp_result_mode)
> +{
> + rtx mask = gen_reg_rtx (cmp_result_mode);
> + bool inverted = arm_expand_vector_compare (mask, GET_CODE
> (operands[3]),
> + operands[4], operands[5], true);
> + if (inverted)
> + std::swap (operands[1], operands[2]);
> + emit_insn (gen_neon_vbsl (GET_MODE (operands[0]), operands[0],
> + mask, operands[1], operands[2]));
> +}
> +
>
>
> #define MAX_VECT_LEN 16
>
> struct expand_vec_perm_d
> diff --git a/gcc/config/arm/neon.md b/gcc/config/arm/neon.md
> index 96bf277f501..58832cbf484 100644
> --- a/gcc/config/arm/neon.md
> +++ b/gcc/config/arm/neon.md
> @@ -1530,6 +1530,30 @@ (define_insn "*us_sub<mode>_neon"
> [(set_attr "type" "neon_qsub<q>")]
> )
>
> +(define_expand "vec_cmp<mode><v_cmp_result>"
> + [(set (match_operand:<V_cmp_result> 0 "s_register_operand")
> + (match_operator:<V_cmp_result> 1 "comparison_operator"
> + [(match_operand:VDQW 2 "s_register_operand")
> + (match_operand:VDQW 3 "reg_or_zero_operand")]))]
> + "TARGET_NEON && (!<Is_float_mode> ||
> flag_unsafe_math_optimizations)"
> +{
> + arm_expand_vector_compare (operands[0], GET_CODE (operands[1]),
> + operands[2], operands[3], false);
> + DONE;
> +})
> +
> +(define_expand "vec_cmpu<mode><mode>"
> + [(set (match_operand:VDQIW 0 "s_register_operand")
> + (match_operator:VDQIW 1 "comparison_operator"
> + [(match_operand:VDQIW 2 "s_register_operand")
> + (match_operand:VDQIW 3 "reg_or_zero_operand")]))]
> + "TARGET_NEON"
> +{
> + arm_expand_vector_compare (operands[0], GET_CODE (operands[1]),
> + operands[2], operands[3], false);
> + DONE;
> +})
> +
> ;; Conditional instructions. These are comparisons with conditional moves
> for
> ;; vectors. They perform the assignment:
> ;;
> @@ -1543,230 +1567,53 @@ (define_expand "vcond<mode><mode>"
> (if_then_else:VDQW
> (match_operator 3 "comparison_operator"
> [(match_operand:VDQW 4 "s_register_operand")
> - (match_operand:VDQW 5 "nonmemory_operand")])
> + (match_operand:VDQW 5 "reg_or_zero_operand")])
> (match_operand:VDQW 1 "s_register_operand")
> (match_operand:VDQW 2 "s_register_operand")))]
> "TARGET_NEON && (!<Is_float_mode> ||
> flag_unsafe_math_optimizations)"
> {
> - int inverse = 0;
> - int use_zero_form = 0;
> - int swap_bsl_operands = 0;
> - rtx mask = gen_reg_rtx (<V_cmp_result>mode);
> - rtx tmp = gen_reg_rtx (<V_cmp_result>mode);
> -
> - rtx (*base_comparison) (rtx, rtx, rtx);
> - rtx (*complimentary_comparison) (rtx, rtx, rtx);
> -
> - switch (GET_CODE (operands[3]))
> - {
> - case GE:
> - case GT:
> - case LE:
> - case LT:
> - case EQ:
> - if (operands[5] == CONST0_RTX (<MODE>mode))
> - {
> - use_zero_form = 1;
> - break;
> - }
> - /* Fall through. */
> - default:
> - if (!REG_P (operands[5]))
> - operands[5] = force_reg (<MODE>mode, operands[5]);
> - }
> -
> - switch (GET_CODE (operands[3]))
> - {
> - case LT:
> - case UNLT:
> - inverse = 1;
> - /* Fall through. */
> - case GE:
> - case UNGE:
> - case ORDERED:
> - case UNORDERED:
> - base_comparison = gen_neon_vcge<mode>;
> - complimentary_comparison = gen_neon_vcgt<mode>;
> - break;
> - case LE:
> - case UNLE:
> - inverse = 1;
> - /* Fall through. */
> - case GT:
> - case UNGT:
> - base_comparison = gen_neon_vcgt<mode>;
> - complimentary_comparison = gen_neon_vcge<mode>;
> - break;
> - case EQ:
> - case NE:
> - case UNEQ:
> - base_comparison = gen_neon_vceq<mode>;
> - complimentary_comparison = gen_neon_vceq<mode>;
> - break;
> - default:
> - gcc_unreachable ();
> - }
> -
> - switch (GET_CODE (operands[3]))
> - {
> - case LT:
> - case LE:
> - case GT:
> - case GE:
> - case EQ:
> - /* The easy case. Here we emit one of vcge, vcgt or vceq.
> - As a LT b <=> b GE a && a LE b <=> b GT a. Our transformations are:
> - a GE b -> a GE b
> - a GT b -> a GT b
> - a LE b -> b GE a
> - a LT b -> b GT a
> - a EQ b -> a EQ b
> - Note that there also exist direct comparison against 0 forms,
> - so catch those as a special case. */
> - if (use_zero_form)
> - {
> - inverse = 0;
> - switch (GET_CODE (operands[3]))
> - {
> - case LT:
> - base_comparison = gen_neon_vclt<mode>;
> - break;
> - case LE:
> - base_comparison = gen_neon_vcle<mode>;
> - break;
> - default:
> - /* Do nothing, other zero form cases already have the correct
> - base_comparison. */
> - break;
> - }
> - }
> -
> - if (!inverse)
> - emit_insn (base_comparison (mask, operands[4], operands[5]));
> - else
> - emit_insn (complimentary_comparison (mask, operands[5],
> operands[4]));
> - break;
> - case UNLT:
> - case UNLE:
> - case UNGT:
> - case UNGE:
> - case NE:
> - /* Vector compare returns false for lanes which are unordered, so if we
> use
> - the inverse of the comparison we actually want to emit, then
> - swap the operands to BSL, we will end up with the correct result.
> - Note that a NE NaN and NaN NE b are true for all a, b.
> -
> - Our transformations are:
> - a GE b -> !(b GT a)
> - a GT b -> !(b GE a)
> - a LE b -> !(a GT b)
> - a LT b -> !(a GE b)
> - a NE b -> !(a EQ b) */
> -
> - if (inverse)
> - emit_insn (base_comparison (mask, operands[4], operands[5]));
> - else
> - emit_insn (complimentary_comparison (mask, operands[5],
> operands[4]));
> -
> - swap_bsl_operands = 1;
> - break;
> - case UNEQ:
> - /* We check (a > b || b > a). combining these comparisons give us
> - true iff !(a != b && a ORDERED b), swapping the operands to BSL
> - will then give us (a == b || a UNORDERED b) as intended. */
> -
> - emit_insn (gen_neon_vcgt<mode> (mask, operands[4], operands[5]));
> - emit_insn (gen_neon_vcgt<mode> (tmp, operands[5], operands[4]));
> - emit_insn (gen_ior<v_cmp_result>3 (mask, mask, tmp));
> - swap_bsl_operands = 1;
> - break;
> - case UNORDERED:
> - /* Operands are ORDERED iff (a > b || b >= a).
> - Swapping the operands to BSL will give the UNORDERED case. */
> - swap_bsl_operands = 1;
> - /* Fall through. */
> - case ORDERED:
> - emit_insn (gen_neon_vcgt<mode> (tmp, operands[4], operands[5]));
> - emit_insn (gen_neon_vcge<mode> (mask, operands[5], operands[4]));
> - emit_insn (gen_ior<v_cmp_result>3 (mask, mask, tmp));
> - break;
> - default:
> - gcc_unreachable ();
> - }
> + arm_expand_vcond (operands, <V_cmp_result>mode);
> + DONE;
> +})
>
> - if (swap_bsl_operands)
> - emit_insn (gen_neon_vbsl<mode> (operands[0], mask, operands[2],
> - operands[1]));
> - else
> - emit_insn (gen_neon_vbsl<mode> (operands[0], mask, operands[1],
> - operands[2]));
> +(define_expand "vcond<V_cvtto><mode>"
> + [(set (match_operand:<V_CVTTO> 0 "s_register_operand")
> + (if_then_else:<V_CVTTO>
> + (match_operator 3 "comparison_operator"
> + [(match_operand:V32 4 "s_register_operand")
> + (match_operand:V32 5 "reg_or_zero_operand")])
> + (match_operand:<V_CVTTO> 1 "s_register_operand")
> + (match_operand:<V_CVTTO> 2 "s_register_operand")))]
> + "TARGET_NEON && (!<Is_float_mode> ||
> flag_unsafe_math_optimizations)"
> +{
> + arm_expand_vcond (operands, <V_cmp_result>mode);
> DONE;
> })
>
> -(define_expand "vcondu<mode><mode>"
> - [(set (match_operand:VDQIW 0 "s_register_operand")
> - (if_then_else:VDQIW
> +(define_expand "vcondu<mode><v_cmp_result>"
> + [(set (match_operand:VDQW 0 "s_register_operand")
> + (if_then_else:VDQW
> (match_operator 3 "arm_comparison_operator"
> - [(match_operand:VDQIW 4 "s_register_operand")
> - (match_operand:VDQIW 5 "s_register_operand")])
> - (match_operand:VDQIW 1 "s_register_operand")
> - (match_operand:VDQIW 2 "s_register_operand")))]
> + [(match_operand:<V_cmp_result> 4 "s_register_operand")
> + (match_operand:<V_cmp_result> 5 "reg_or_zero_operand")])
> + (match_operand:VDQW 1 "s_register_operand")
> + (match_operand:VDQW 2 "s_register_operand")))]
> "TARGET_NEON"
> {
> - rtx mask;
> - int inverse = 0, immediate_zero = 0;
> -
> - mask = gen_reg_rtx (<V_cmp_result>mode);
> -
> - if (operands[5] == CONST0_RTX (<MODE>mode))
> - immediate_zero = 1;
> - else if (!REG_P (operands[5]))
> - operands[5] = force_reg (<MODE>mode, operands[5]);
> -
> - switch (GET_CODE (operands[3]))
> - {
> - case GEU:
> - emit_insn (gen_neon_vcgeu<mode> (mask, operands[4], operands[5]));
> - break;
> -
> - case GTU:
> - emit_insn (gen_neon_vcgtu<mode> (mask, operands[4], operands[5]));
> - break;
> -
> - case EQ:
> - emit_insn (gen_neon_vceq<mode> (mask, operands[4], operands[5]));
> - break;
> -
> - case LEU:
> - if (immediate_zero)
> - emit_insn (gen_neon_vcle<mode> (mask, operands[4], operands[5]));
> - else
> - emit_insn (gen_neon_vcgeu<mode> (mask, operands[5],
> operands[4]));
> - break;
> -
> - case LTU:
> - if (immediate_zero)
> - emit_insn (gen_neon_vclt<mode> (mask, operands[4], operands[5]));
> - else
> - emit_insn (gen_neon_vcgtu<mode> (mask, operands[5],
> operands[4]));
> - break;
> -
> - case NE:
> - emit_insn (gen_neon_vceq<mode> (mask, operands[4], operands[5]));
> - inverse = 1;
> - break;
> -
> - default:
> - gcc_unreachable ();
> - }
> -
> - if (inverse)
> - emit_insn (gen_neon_vbsl<mode> (operands[0], mask, operands[2],
> - operands[1]));
> - else
> - emit_insn (gen_neon_vbsl<mode> (operands[0], mask, operands[1],
> - operands[2]));
> + arm_expand_vcond (operands, <V_cmp_result>mode);
> + DONE;
> +})
>
> +(define_expand "vcond_mask_<mode><v_cmp_result>"
> + [(set (match_operand:VDQW 0 "s_register_operand")
> + (if_then_else:VDQW
> + (match_operand:<V_cmp_result> 3 "s_register_operand")
> + (match_operand:VDQW 1 "s_register_operand")
> + (match_operand:VDQW 2 "s_register_operand")))]
> + "TARGET_NEON"
> +{
> + emit_insn (gen_neon_vbsl<mode> (operands[0], operands[3], operands[1],
> + operands[2]));
> DONE;
> })
>
> @@ -2601,7 +2448,7 @@ (define_insn "neon_v<r>subhn<mode>"
>
> ;; These may expand to an UNSPEC pattern when a floating point mode is
> used
> ;; without unsafe math optimizations.
> -(define_expand "neon_vc<cmp_op><mode>"
> +(define_expand "@neon_vc<cmp_op><mode>"
> [(match_operand:<V_cmp_result> 0 "s_register_operand")
> (neg:<V_cmp_result>
> (COMPARISONS:VDQW (match_operand:VDQW 1 "s_register_operand")
> @@ -2641,7 +2488,7 @@ (define_expand "neon_vc<cmp_op><mode>"
> }
> )
>
> -(define_insn "neon_vc<cmp_op><mode>_insn"
> +(define_insn "@neon_vc<cmp_op><mode>_insn"
> [(set (match_operand:<V_cmp_result> 0 "s_register_operand" "=w,w")
> (neg:<V_cmp_result>
> (COMPARISONS:<V_cmp_result>
> @@ -2685,7 +2532,7 @@ (define_insn
> "neon_vc<cmp_op_unsp><mode>_insn_unspec"
> [(set_attr "type" "neon_fp_compare_s<q>")]
> )
>
> -(define_expand "neon_vc<cmp_op><mode>"
> +(define_expand "@neon_vc<cmp_op><mode>"
> [(match_operand:<V_cmp_result> 0 "s_register_operand")
> (neg:<V_cmp_result>
> (COMPARISONS:VH
> @@ -2751,7 +2598,7 @@ (define_insn
> "neon_vc<cmp_op_unsp><mode>_fp16insn_unspec"
> }
> [(set_attr "type" "neon_fp_compare_s<q>")])
>
> -(define_insn "neon_vc<cmp_op>u<mode>"
> +(define_insn "@neon_vc<code><mode>"
> [(set (match_operand:<V_cmp_result> 0 "s_register_operand" "=w")
> (neg:<V_cmp_result>
> (GTUGEU:<V_cmp_result>
> @@ -4708,7 +4555,7 @@ (define_insn "neon_vbsl<mode>_internal"
> [(set_attr "type" "neon_bsl<q>")]
> )
>
> -(define_expand "neon_vbsl<mode>"
> +(define_expand "@neon_vbsl<mode>"
> [(set (match_operand:VDQX 0 "s_register_operand")
> (unspec:VDQX [(match_operand:<V_cmp_result> 1
> "s_register_operand")
> (match_operand:VDQX 2 "s_register_operand")
> diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-
> supports.exp
> index 8314e443c43..69a2b8d838d 100644
> --- a/gcc/testsuite/lib/target-supports.exp
> +++ b/gcc/testsuite/lib/target-supports.exp
> @@ -7233,6 +7233,8 @@ proc check_effective_target_vect_cond_mixed { }
> {
> expr { [istarget i?86-*-*] || [istarget x86_64-*-*]
> || [istarget aarch64*-*-*]
> || [istarget powerpc*-*-*]
> + || ([istarget arm*-*-*]
> + && [check_effective_target_arm_neon_ok])
> || ([istarget mips*-*-*]
> && [et-is-effective-target mips_msa])
> || ([istarget s390*-*-*]
> diff --git a/gcc/testsuite/gcc.target/arm/neon-compare-1.c
> b/gcc/testsuite/gcc.target/arm/neon-compare-1.c
> new file mode 100644
> index 00000000000..c915eca6dbe
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/arm/neon-compare-1.c
> @@ -0,0 +1,84 @@
> +/* { dg-do compile } */
> +/* { dg-require-effective-target arm_neon_ok } */
> +/* { dg-options "-O1" } */
> +/* { dg-add-options arm_neon } */
> +
> +#define COMPARE_REG(NAME, OP, TYPE) \
> + TYPE \
> + cmp_##NAME##_##TYPE##_reg (TYPE a, TYPE b) \
> + { \
> + return a OP b; \
> + }
> +
> +#define COMPARE_REG_AND_ZERO(NAME, OP, TYPE) \
> + COMPARE_REG (NAME, OP, TYPE) \
> + \
> + TYPE \
> + cmp_##NAME##_##TYPE##_zero (TYPE a) \
> + { \
> + return a OP (TYPE) {}; \
> + }
> +
> +#define COMPARE_TYPE(TYPE, COMPARE_ORDERED) \
> + COMPARE_REG_AND_ZERO (eq, ==, TYPE) \
> + COMPARE_REG_AND_ZERO (ne, !=, TYPE) \
> + COMPARE_ORDERED (lt, <, TYPE) \
> + COMPARE_ORDERED (le, <=, TYPE) \
> + COMPARE_ORDERED (gt, >, TYPE) \
> + COMPARE_ORDERED (ge, >=, TYPE)
> +
> +#define TEST_TYPE(NAME, ELEM, COMPARE_ORDERED) \
> + typedef ELEM NAME __attribute__((vector_size(16))); \
> + COMPARE_TYPE (NAME, COMPARE_ORDERED)
> +
> +TEST_TYPE (vs8, __INT8_TYPE__, COMPARE_REG_AND_ZERO)
> +TEST_TYPE (vu8, __UINT8_TYPE__, COMPARE_REG)
> +TEST_TYPE (vs16, __INT16_TYPE__, COMPARE_REG_AND_ZERO)
> +TEST_TYPE (vu16, __UINT16_TYPE__, COMPARE_REG)
> +TEST_TYPE (vs32, __INT32_TYPE__, COMPARE_REG_AND_ZERO)
> +TEST_TYPE (vu32, __UINT32_TYPE__, COMPARE_REG)
> +
> +/* { s8, u8 } x { eq, ne }.
> +/* { dg-final { scan-assembler-times {\tvceq.i8\tq[0-9]+, q[0-9]+, q[0-9]+\n}
> 4 } } */
> +/* { dg-final { scan-assembler-times {\tvceq.i8\tq[0-9]+, q[0-9]+, #0\n} 4 }
> }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.s8\tq[0-9]+, q[0-9]+, q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.s8\tq[0-9]+, q[0-9]+, #0\n} 1 }
> }
> */
> +/* { dg-final { scan-assembler-times {\tvclt.s8\tq[0-9]+, q[0-9]+, #0\n} 1 }
> }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcge.s8\tq[0-9]+, q[0-9]+, q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.s8\tq[0-9]+, q[0-9]+, #0\n} 1 }
> }
> */
> +/* { dg-final { scan-assembler-times {\tvcle.s8\tq[0-9]+, q[0-9]+, #0\n} 1 }
> }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.u8\tq[0-9]+, q[0-9]+, q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.u8\tq[0-9]+, q[0-9]+, q[0-9]+\n}
> 2 } } */
> +
> +/* { s16, u16 } x { eq, ne }.
> +/* { dg-final { scan-assembler-times {\tvceq.i16\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 4 } } */
> +/* { dg-final { scan-assembler-times {\tvceq.i16\tq[0-9]+, q[0-9]+, #0\n} 4
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.s16\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.s16\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvclt.s16\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcge.s16\tq[0-9]+, q[0-9]+, q[0-
> 9]+\n} 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.s16\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvcle.s16\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.u16\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.u16\tq[0-9]+, q[0-9]+, q[0-
> 9]+\n} 2 } } */
> +
> +/* { s32, u32 } x { eq, ne }.
> +/* { dg-final { scan-assembler-times {\tvceq.i32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 4 } } */
> +/* { dg-final { scan-assembler-times {\tvceq.i32\tq[0-9]+, q[0-9]+, #0\n} 4
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.s32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.s32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvclt.s32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcge.s32\tq[0-9]+, q[0-9]+, q[0-
> 9]+\n} 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.s32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvcle.s32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.u32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.u32\tq[0-9]+, q[0-9]+, q[0-
> 9]+\n} 2 } } */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-compare-2.c
> b/gcc/testsuite/gcc.target/arm/neon-compare-2.c
> new file mode 100644
> index 00000000000..559c5e5d8fc
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/arm/neon-compare-2.c
> @@ -0,0 +1,45 @@
> +/* { dg-do compile } */
> +/* { dg-require-effective-target arm_neon_ok } */
> +/* { dg-options "-O1 -funsafe-math-optimizations" } */
> +/* { dg-add-options arm_neon } */
> +
> +#ifndef ELEM_TYPE
> +#define ELEM_TYPE float
> +#endif
> +#ifndef INT_ELEM_TYPE
> +#define INT_ELEM_TYPE __INT32_TYPE__
> +#endif
> +
> +#define COMPARE(NAME, OP) \
> + int_vec \
> + cmp_##NAME##_reg (vec a, vec b) \
> + { \
> + return a OP b; \
> + } \
> + \
> + int_vec \
> + cmp_##NAME##_zero (vec a) \
> + { \
> + return a OP (vec) {}; \
> + }
> +
> +typedef INT_ELEM_TYPE int_vec __attribute__((vector_size(16)));
> +typedef ELEM_TYPE vec __attribute__((vector_size(16)));
> +
> +COMPARE (eq, ==)
> +COMPARE (ne, !=)
> +COMPARE (lt, <)
> +COMPARE (le, <=)
> +COMPARE (gt, >)
> +COMPARE (ge, >=)
> +
> +/* { dg-final { scan-assembler-times {\tvceq.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvceq.f32\tq[0-9]+, q[0-9]+, #0\n} 2
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvclt.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcge.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvcle.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-compare-3.c
> b/gcc/testsuite/gcc.target/arm/neon-compare-3.c
> new file mode 100644
> index 00000000000..efbe79728a9
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/arm/neon-compare-3.c
> @@ -0,0 +1,44 @@
> +/* { dg-do compile } */
> +/* { dg-require-effective-target arm_neon_ok } */
> +/* { dg-options "-O1 -ftree-vectorize -funsafe-math-optimizations" } */
> +/* { dg-add-options arm_neon } */
> +
> +#define ult(a, b) (!__builtin_isgreaterequal (a, b))
> +#define ule(a, b) (!__builtin_isgreater (a, b))
> +#define ugt(a, b) (!__builtin_islessequal (a, b))
> +#define uge(a, b) (!__builtin_isless (a, b))
> +
> +int x[16];
> +float a[16];
> +float b[16];
> +
> +#define COMPARE(NAME) \
> + void \
> + cmp_##NAME##_reg (void) \
> + { \
> + for (int i = 0; i < 16; ++i) \
> + x[i] = NAME (a[i], b[i]) ? 2 : 0; \
> + } \
> + \
> + void \
> + cmp_##NAME##_zero (void) \
> + { \
> + for (int i = 0; i < 16; ++i) \
> + x[i] = NAME (a[i], 0) ? 2 : 0; \
> + }
> +
> +typedef int int_vec __attribute__((vector_size(16)));
> +typedef float vec __attribute__((vector_size(16)));
> +
> +COMPARE (ult)
> +COMPARE (ule)
> +COMPARE (ugt)
> +COMPARE (uge)
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvclt.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcge.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcge.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvcle.f32\tq[0-9]+, q[0-9]+, #0\n} 1
> } }
> */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-compare-4.c
> b/gcc/testsuite/gcc.target/arm/neon-compare-4.c
> new file mode 100644
> index 00000000000..3f8cc906c66
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/arm/neon-compare-4.c
> @@ -0,0 +1,38 @@
> +/* { dg-do compile } */
> +/* { dg-require-effective-target arm_neon_ok } */
> +/* { dg-options "-O1 -ftree-vectorize -funsafe-math-optimizations" } */
> +/* { dg-add-options arm_neon } */
> +
> +#define ordered(a, b) (!__builtin_isunordered (a, b))
> +#define unordered(a, b) (__builtin_isunordered (a, b))
> +
> +int x[16];
> +float a[16];
> +float b[16];
> +
> +#define COMPARE(NAME) \
> + void \
> + cmp_##NAME##_reg (void) \
> + { \
> + for (int i = 0; i < 16; ++i) \
> + x[i] = NAME (a[i], b[i]) ? 2 : 0; \
> + } \
> + \
> + void \
> + cmp_##NAME##_zero (void) \
> + { \
> + for (int i = 0; i < 16; ++i) \
> + x[i] = NAME (a[i], 0) ? 2 : 0; \
> + }
> +
> +typedef int int_vec __attribute__((vector_size(16)));
> +typedef float vec __attribute__((vector_size(16)));
> +
> +COMPARE (ordered)
> +COMPARE (unordered)
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+, #0\n} 2
> } }
> */
> +
> +/* { dg-final { scan-assembler-times {\tvcge.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 2 } } */
> +/* { dg-final { scan-assembler-times {\tvcle.f32\tq[0-9]+, q[0-9]+, #0\n} 2
> } }
> */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-compare-5.c
> b/gcc/testsuite/gcc.target/arm/neon-compare-5.c
> new file mode 100644
> index 00000000000..cb6428d3f08
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/arm/neon-compare-5.c
> @@ -0,0 +1,37 @@
> +/* { dg-do compile } */
> +/* { dg-require-effective-target arm_neon_ok } */
> +/* { dg-options "-O1 -ftree-vectorize -funsafe-math-optimizations" } */
> +/* { dg-add-options arm_neon } */
> +
> +#define uneq(a, b) (!__builtin_islessgreater (a, b))
> +/* RTL's LTGT is a signaling comparison. */
> +#define ltgt(a, b) (a < b || b < a)
> +
> +int x[16];
> +float a[16];
> +float b[16];
> +
> +#define COMPARE(NAME) \
> + void \
> + cmp_##NAME##_reg (void) \
> + { \
> + for (int i = 0; i < 16; ++i) \
> + x[i] = NAME (a[i], b[i]) ? 2 : 0; \
> + } \
> + \
> + void \
> + cmp_##NAME##_zero (void) \
> + { \
> + for (int i = 0; i < 16; ++i) \
> + x[i] = NAME (a[i], 0) ? 2 : 0; \
> + }
> +
> +typedef int int_vec __attribute__((vector_size(16)));
> +typedef float vec __attribute__((vector_size(16)));
> +
> +COMPARE (uneq)
> +COMPARE (ltgt)
> +
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+,
> q[0-9]+\n}
> 4 } } */
> +/* { dg-final { scan-assembler-times {\tvcgt.f32\tq[0-9]+, q[0-9]+, #0\n} 2
> } }
> */
> +/* { dg-final { scan-assembler-times {\tvclt.f32\tq[0-9]+, q[0-9]+, #0\n} 2
> } }
> */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-vcond-gt.c
> b/gcc/testsuite/gcc.target/arm/neon-vcond-gt.c
> index 8e9f3785169..9f601a169d1 100644
> --- a/gcc/testsuite/gcc.target/arm/neon-vcond-gt.c
> +++ b/gcc/testsuite/gcc.target/arm/neon-vcond-gt.c
> @@ -13,5 +13,5 @@ void foo (int ilast,float* w, float* w2)
> }
> }
>
> -/* { dg-final { scan-assembler "vcgt\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*q\[0-9\]+" } } */
> +/* { dg-final { scan-assembler "vclt\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*#0" } } */
> /* { dg-final { scan-assembler "vbsl|vbit|vbif\[\\t \]*q\[0-9\]+,\[\\t
> \]*q\[0-
> 9\]+,\[\\t \]*q\[0-9\]+" } } */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-vcond-ltgt.c
> b/gcc/testsuite/gcc.target/arm/neon-vcond-ltgt.c
> index c8306e364a3..74bc22046ad 100644
> --- a/gcc/testsuite/gcc.target/arm/neon-vcond-ltgt.c
> +++ b/gcc/testsuite/gcc.target/arm/neon-vcond-ltgt.c
> @@ -13,6 +13,7 @@ void foo (int ilast,float* w, float* w2)
> }
> }
>
> -/* { dg-final { scan-assembler-times "vcgt\\.f32\[\\t \]*q\[0-9\]+,\[\\t
> \]*q\[0-9\]+,\[\\t \]*q\[0-9\]+" 2 } } */
> +/* { dg-final { scan-assembler "vclt\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*#0" } } */
> +/* { dg-final { scan-assembler "vcgt\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*#0" } } */
> /* { dg-final { scan-assembler "vorr\[\\t \]*q\[0-9\]+,\[\\t
> \]*q\[0-9\]+,\[\\t
> \]*q\[0-9\]+" } } */
> /* { dg-final { scan-assembler "vbsl|vbit|vbif\[\\t \]*q\[0-9\]+,\[\\t
> \]*q\[0-
> 9\]+,\[\\t \]*q\[0-9\]+" } } */
> diff --git a/gcc/testsuite/gcc.target/arm/neon-vcond-unordered.c
> b/gcc/testsuite/gcc.target/arm/neon-vcond-unordered.c
> index 3bb67d3afe3..8d3187541e2 100644
> --- a/gcc/testsuite/gcc.target/arm/neon-vcond-unordered.c
> +++ b/gcc/testsuite/gcc.target/arm/neon-vcond-unordered.c
> @@ -13,7 +13,7 @@ void foo (int ilast,float* w, float* w2)
> }
> }
>
> -/* { dg-final { scan-assembler "vcgt\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*q\[0-9\]+" } } */
> -/* { dg-final { scan-assembler "vcge\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*q\[0-9\]+" } } */
> +/* { dg-final { scan-assembler "vcgt\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*#0" } } */
> +/* { dg-final { scan-assembler "vcle\\.f32\[\\t \]*q\[0-9\]+,\[\\t \]*q\[0-
> 9\]+,\[\\t \]*#0" } } */
> /* { dg-final { scan-assembler "vorr\[\\t \]*q\[0-9\]+,\[\\t
> \]*q\[0-9\]+,\[\\t
> \]*q\[0-9\]+" } } */
> /* { dg-final { scan-assembler "vbsl|vbit|vbif\[\\t \]*q\[0-9\]+,\[\\t
> \]*q\[0-
> 9\]+,\[\\t \]*q\[0-9\]+" } } */
