;;  Copyright (c) 2010-2013, Intel Corporation
;;  All rights reserved.
;;
;;  Redistribution and use in source and binary forms, with or without
;;  modification, are permitted provided that the following conditions are
;;  met:
;;
;;    * Redistributions of source code must retain the above copyright
;;      notice, this list of conditions and the following disclaimer.
;;
;;    * Redistributions in binary form must reproduce the above copyright
;;      notice, this list of conditions and the following disclaimer in the
;;      documentation and/or other materials provided with the distribution.
;;
;;    * Neither the name of Intel Corporation nor the names of its
;;      contributors may be used to endorse or promote products derived from
;;      this software without specific prior written permission.
;;
;;
;;   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
;;   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
;;   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
;;   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
;;   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;;   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
;;   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;;   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;;   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  

define(`HAVE_GATHER', `1')

include(`target-avx-x2.ll')

rdrand_definition()

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; int min/max

declare <8 x i32> @llvm.x86.avx2.pmins.d(<8 x i32>, <8 x i32>) nounwind readonly
declare <8 x i32> @llvm.x86.avx2.pmaxs.d(<8 x i32>, <8 x i32>) nounwind readonly

define <16 x i32> @__min_varying_int32(<16 x i32>, <16 x i32>) nounwind readonly alwaysinline {
  binary8to16(m, i32, @llvm.x86.avx2.pmins.d, %0, %1)
  ret <16 x i32> %m
}

define <16 x i32> @__max_varying_int32(<16 x i32>, <16 x i32>) nounwind readonly alwaysinline {
  binary8to16(m, i32, @llvm.x86.avx2.pmaxs.d, %0, %1)
  ret <16 x i32> %m
}

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; unsigned int min/max

declare <8 x i32> @llvm.x86.avx2.pminu.d(<8 x i32>, <8 x i32>) nounwind readonly
declare <8 x i32> @llvm.x86.avx2.pmaxu.d(<8 x i32>, <8 x i32>) nounwind readonly

define <16 x i32> @__min_varying_uint32(<16 x i32>, <16 x i32>) nounwind readonly alwaysinline {
  binary8to16(m, i32, @llvm.x86.avx2.pminu.d, %0, %1)
  ret <16 x i32> %m
}

define <16 x i32> @__max_varying_uint32(<16 x i32>, <16 x i32>) nounwind readonly alwaysinline {
  binary8to16(m, i32, @llvm.x86.avx2.pmaxu.d, %0, %1)
  ret <16 x i32> %m
}

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; float/half conversions

declare <8 x float> @llvm.x86.vcvtph2ps.256(<8 x i16>) nounwind readnone
; 0 is round nearest even
declare <8 x i16> @llvm.x86.vcvtps2ph.256(<8 x float>, i32) nounwind readnone

define <16 x float> @__half_to_float_varying(<16 x i16> %v) nounwind readnone {
  %r_0 = shufflevector <16 x i16> %v, <16 x i16> undef,
             <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
  %vr_0 = call <8 x float> @llvm.x86.vcvtph2ps.256(<8 x i16> %r_0)
  %r_1 = shufflevector <16 x i16> %v, <16 x i16> undef,
             <8 x i32> <i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
  %vr_1 = call <8 x float> @llvm.x86.vcvtph2ps.256(<8 x i16> %r_1)
  %r = shufflevector <8 x float> %vr_0, <8 x float> %vr_1, 
           <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7,
                       i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
  ret <16 x float> %r
}

define <16 x i16> @__float_to_half_varying(<16 x float> %v) nounwind readnone {
  %r_0 = shufflevector <16 x float> %v, <16 x float> undef,
             <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
  %vr_0 = call <8 x i16> @llvm.x86.vcvtps2ph.256(<8 x float> %r_0, i32 0)
  %r_1 = shufflevector <16 x float> %v, <16 x float> undef,
             <8 x i32> <i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
  %vr_1 = call <8 x i16> @llvm.x86.vcvtps2ph.256(<8 x float> %r_1, i32 0)
  %r = shufflevector <8 x i16> %vr_0, <8 x i16> %vr_1, 
           <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7,
                       i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
  ret <16 x i16> %r
}

define float @__half_to_float_uniform(i16 %v) nounwind readnone {
  %v1 = bitcast i16 %v to <1 x i16>
  %vv = shufflevector <1 x i16> %v1, <1 x i16> undef,
           <8 x i32> <i32 0, i32 undef, i32 undef, i32 undef,
                      i32 undef, i32 undef, i32 undef, i32 undef>
  %rv = call <8 x float> @llvm.x86.vcvtph2ps.256(<8 x i16> %vv)
  %r = extractelement <8 x float> %rv, i32 0
  ret float %r
}

define i16 @__float_to_half_uniform(float %v) nounwind readnone {
  %v1 = bitcast float %v to <1 x float>
  %vv = shufflevector <1 x float> %v1, <1 x float> undef,
           <8 x i32> <i32 0, i32 undef, i32 undef, i32 undef,
                      i32 undef, i32 undef, i32 undef, i32 undef>
  ; round to nearest even
  %rv = call <8 x i16> @llvm.x86.vcvtps2ph.256(<8 x float> %vv, i32 0)
  %r = extractelement <8 x i16> %rv, i32 0
  ret i16 %r
}


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; gather

declare void @llvm.trap() noreturn nounwind

; $1: type
; $2: var base name
define(`extract_4s', `
  %$2_1 = shufflevector <16 x $1> %$2, <16 x $1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
  %$2_2 = shufflevector <16 x $1> %$2, <16 x $1> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7>
  %$2_3 = shufflevector <16 x $1> %$2, <16 x $1> undef, <4 x i32> <i32 8, i32 9, i32 10, i32 11>
  %$2_4 = shufflevector <16 x $1> %$2, <16 x $1> undef, <4 x i32> <i32 12, i32 13, i32 14, i32 15>
')

; $1: type
; $2: var base name
define(`extract_8s', `
  %$2_1 = shufflevector <16 x $1> %$2, <16 x $1> undef,
                    <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
  %$2_2 = shufflevector <16 x $1> %$2, <16 x $1> undef,
                    <8 x i32> <i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
')

; $1: element type
; $2: ret name
; $3: v1
; $4: v2
define(`assemble_8s', `
  %$2 = shufflevector <8 x $1> %$3, <8 x $1> %$4,
                      <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7,
                                  i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
')

; $1: element type
; $2: ret name
; $3: v1
; $4: v2
; $5: v3
; $6: v4
define(`assemble_4s', `
  %$2_1 = shufflevector <4 x $1> %$3, <4 x $1> %$4,
                    <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
  %$2_2 = shufflevector <4 x $1> %$5, <4 x $1> %$6,
                    <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
  assemble_8s($1, $2, $2_1, $2_2)
')


gen_gather(i8)
gen_gather(i16)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; int32 gathers

declare <8 x i32> @llvm.x86.avx2.gather.d.d.256(<8 x i32> %target, i8 * %ptr,
                       <8 x i32> %indices, <8 x i32> %mask, i8 %scale) readonly nounwind
declare <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> %target, i8 * %ptr,
                       <4 x i64> %indices, <4 x i32> %mask, i8 %scale) readonly nounwind

define <16 x i32> @__gather_base_offsets32_i32(i8 * %ptr, i32 %scale, <16 x i32> %offsets,
                             <16 x i32> %vecmask) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  extract_8s(i32, offsets)
  extract_8s(i32, vecmask)

  %v1 = call <8 x i32> @llvm.x86.avx2.gather.d.d.256(<8 x i32> undef, i8 * %ptr,
                             <8 x i32> %offsets_1, <8 x i32> %vecmask_1, i8 %scale8)
  %v2 = call <8 x i32> @llvm.x86.avx2.gather.d.d.256(<8 x i32> undef, i8 * %ptr,
                             <8 x i32> %offsets_2, <8 x i32> %vecmask_2, i8 %scale8)

  assemble_8s(i32, v, v1, v2)

  ret <16 x i32> %v
}


define <16 x i32> @__gather_base_offsets64_i32(i8 * %ptr,
                             i32 %scale, <16 x i64> %offsets,
                             <16 x i32> %vecmask) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8

  extract_4s(i32, vecmask)
  extract_4s(i64, offsets)

  %v1 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * %ptr, 
                      <4 x i64> %offsets_1, <4 x i32> %vecmask_1, i8 %scale8)
  %v2 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * %ptr, 
                      <4 x i64> %offsets_2, <4 x i32> %vecmask_2, i8 %scale8)
  %v3 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * %ptr, 
                      <4 x i64> %offsets_3, <4 x i32> %vecmask_3, i8 %scale8)
  %v4 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * %ptr, 
                      <4 x i64> %offsets_4, <4 x i32> %vecmask_4, i8 %scale8)

  assemble_4s(i32, v, v1, v2, v3, v4)

  ret <16 x i32> %v
}


define <16 x i32> @__gather32_i32(<16 x i32> %ptrs, 
                                  <16 x i32> %vecmask) nounwind readonly alwaysinline {
  extract_8s(i32, ptrs)
  extract_8s(i32, vecmask)

  %v1 = call <8 x i32> @llvm.x86.avx2.gather.d.d.256(<8 x i32> undef, i8 * null,
                       <8 x i32> %ptrs_1, <8 x i32> %vecmask_1, i8 1)
  %v2 = call <8 x i32> @llvm.x86.avx2.gather.d.d.256(<8 x i32> undef, i8 * null,
                       <8 x i32> %ptrs_2, <8 x i32> %vecmask_2, i8 1)

  assemble_8s(i32, v, v1, v2)

  ret <16 x i32> %v
}


define <16 x i32> @__gather64_i32(<16 x i64> %ptrs, 
                                  <16 x i32> %vecmask) nounwind readonly alwaysinline {
  extract_4s(i64, ptrs)
  extract_4s(i32, vecmask)

  %v1 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * null,
                      <4 x i64> %ptrs_1, <4 x i32> %vecmask_1, i8 1)
  %v2 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * null,
                      <4 x i64> %ptrs_2, <4 x i32> %vecmask_2, i8 1)
  %v3 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * null,
                      <4 x i64> %ptrs_3, <4 x i32> %vecmask_3, i8 1)
  %v4 = call <4 x i32> @llvm.x86.avx2.gather.q.d.256(<4 x i32> undef, i8 * null,
                      <4 x i64> %ptrs_4, <4 x i32> %vecmask_4, i8 1)

  assemble_4s(i32, v, v1, v2, v3, v4)

  ret <16 x i32> %v
}


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; float gathers

declare <8 x float> @llvm.x86.avx2.gather.d.ps.256(<8 x float> %target, i8 * %ptr,
                       <8 x i32> %indices, <8 x float> %mask, i8 %scale8) readonly nounwind
declare <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> %target, i8 * %ptr,
                       <4 x i64> %indices, <4 x float> %mask, i8 %scale8) readonly nounwind

define <16 x float> @__gather_base_offsets32_float(i8 * %ptr,
                                  i32 %scale, <16 x i32> %offsets,
                                  <16 x i32> %vecmask) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  %mask = bitcast <16 x i32> %vecmask to <16 x float>
  extract_8s(i32, offsets)
  extract_8s(float, mask)

  %v1 = call <8 x float> @llvm.x86.avx2.gather.d.ps.256(<8 x float> undef, i8 * %ptr,
                       <8 x i32> %offsets_1, <8 x float> %mask_1, i8 %scale8)
  %v2 = call <8 x float> @llvm.x86.avx2.gather.d.ps.256(<8 x float> undef, i8 * %ptr,
                       <8 x i32> %offsets_2, <8 x float> %mask_2, i8 %scale8)

  assemble_8s(float, v, v1, v2)

  ret <16 x float> %v
}


define <16 x float> @__gather_base_offsets64_float(i8 * %ptr,
                                   i32 %scale, <16 x i64> %offsets,
                                   <16 x i32> %vecmask) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  %mask = bitcast <16 x i32> %vecmask to <16 x float>
  extract_4s(i64, offsets)
  extract_4s(float, mask)

  %v1 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * %ptr, 
                     <4 x i64> %offsets_1, <4 x float> %mask_1, i8 %scale8)
  %v2 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * %ptr, 
                     <4 x i64> %offsets_2, <4 x float> %mask_2, i8 %scale8)
  %v3 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * %ptr, 
                     <4 x i64> %offsets_3, <4 x float> %mask_3, i8 %scale8)
  %v4 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * %ptr, 
                     <4 x i64> %offsets_4, <4 x float> %mask_4, i8 %scale8)

  assemble_4s(float, v, v1, v2, v3, v4)

  ret <16 x float> %v
}


define <16 x float> @__gather32_float(<16 x i32> %ptrs, 
                                      <16 x i32> %vecmask) nounwind readonly alwaysinline {
  %mask = bitcast <16 x i32> %vecmask to <16 x float>
  extract_8s(float, mask)
  extract_8s(i32, ptrs)

  %v1 = call <8 x float> @llvm.x86.avx2.gather.d.ps.256(<8 x float> undef, i8 * null,
                     <8 x i32> %ptrs_1, <8 x float> %mask_1, i8 1)
  %v2 = call <8 x float> @llvm.x86.avx2.gather.d.ps.256(<8 x float> undef, i8 * null,
                     <8 x i32> %ptrs_2, <8 x float> %mask_2, i8 1)

  assemble_8s(float, v, v1, v2)

  ret <16 x float> %v
}


define <16 x float> @__gather64_float(<16 x i64> %ptrs, 
                                      <16 x i32> %vecmask) nounwind readonly alwaysinline {
  %mask = bitcast <16 x i32> %vecmask to <16 x float>
  extract_4s(i64, ptrs)
  extract_4s(float, mask)

  %v1 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * null,
                      <4 x i64> %ptrs_1, <4 x float> %mask_1, i8 1)
  %v2 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * null,
                      <4 x i64> %ptrs_2, <4 x float> %mask_2, i8 1)
  %v3 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * null,
                      <4 x i64> %ptrs_3, <4 x float> %mask_3, i8 1)
  %v4 = call <4 x float> @llvm.x86.avx2.gather.q.ps.256(<4 x float> undef, i8 * null,
                      <4 x i64> %ptrs_4, <4 x float> %mask_4, i8 1)

  assemble_4s(float, v, v1, v2, v3, v4)

  ret <16 x float> %v
}

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; int64 gathers

declare <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> %target, i8 * %ptr,
                       <4 x i32> %indices, <4 x i64> %mask, i8 %scale) readonly nounwind
declare <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> %target, i8 * %ptr,
                       <4 x i64> %indices, <4 x i64> %mask, i8 %scale) readonly nounwind

define <16 x i64> @__gather_base_offsets32_i64(i8 * %ptr,
                             i32 %scale, <16 x i32> %offsets,
                             <16 x i32> %mask32) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  %vecmask = sext <16 x i32> %mask32 to <16 x i64>
  extract_4s(i32, offsets)
  extract_4s(i64, vecmask)

  %v1 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * %ptr,
                             <4 x i32> %offsets_1, <4 x i64> %vecmask_1, i8 %scale8)
  %v2 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * %ptr,
                             <4 x i32> %offsets_2, <4 x i64> %vecmask_2, i8 %scale8)
  %v3 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * %ptr,
                             <4 x i32> %offsets_3, <4 x i64> %vecmask_3, i8 %scale8)
  %v4 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * %ptr,
                             <4 x i32> %offsets_4, <4 x i64> %vecmask_4, i8 %scale8)

  assemble_4s(i64, v, v1, v2, v3, v4)

  ret <16 x i64> %v
}


define <16 x i64> @__gather_base_offsets64_i64(i8 * %ptr,
                             i32 %scale, <16 x i64> %offsets,
                             <16 x i32> %mask32) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  %vecmask = sext <16 x i32> %mask32 to <16 x i64>
  extract_4s(i64, offsets)
  extract_4s(i64, vecmask)

  %v1 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * %ptr, 
                      <4 x i64> %offsets_1, <4 x i64> %vecmask_1, i8 %scale8)
  %v2 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * %ptr, 
                      <4 x i64> %offsets_2, <4 x i64> %vecmask_2, i8 %scale8)
  %v3 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * %ptr, 
                      <4 x i64> %offsets_3, <4 x i64> %vecmask_3, i8 %scale8)
  %v4 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * %ptr, 
                      <4 x i64> %offsets_4, <4 x i64> %vecmask_4, i8 %scale8)

  assemble_4s(i64, v, v1, v2, v3, v4)

  ret <16 x i64> %v
}


define <16 x i64> @__gather32_i64(<16 x i32> %ptrs, 
                                  <16 x i32> %mask32) nounwind readonly alwaysinline {
  %vecmask = sext <16 x i32> %mask32 to <16 x i64>
  extract_4s(i32, ptrs)
  extract_4s(i64, vecmask)

  %v1 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * null,
                      <4 x i32> %ptrs_1, <4 x i64> %vecmask_1, i8 1)
  %v2 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * null,
                      <4 x i32> %ptrs_2, <4 x i64> %vecmask_2, i8 1)
  %v3 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * null,
                      <4 x i32> %ptrs_3, <4 x i64> %vecmask_3, i8 1)
  %v4 = call <4 x i64> @llvm.x86.avx2.gather.d.q.256(<4 x i64> undef, i8 * null,
                      <4 x i32> %ptrs_4, <4 x i64> %vecmask_4, i8 1)

  assemble_4s(i64, v, v1, v2, v3, v4)

  ret <16 x i64> %v
}

define <16 x i64> @__gather64_i64(<16 x i64> %ptrs, 
                                  <16 x i32> %mask32) nounwind readonly alwaysinline {
  %vecmask = sext <16 x i32> %mask32 to <16 x i64>
  extract_4s(i64, ptrs)
  extract_4s(i64, vecmask)

  %v1 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * null,
                      <4 x i64> %ptrs_1, <4 x i64> %vecmask_1, i8 1)
  %v2 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * null,
                      <4 x i64> %ptrs_2, <4 x i64> %vecmask_2, i8 1)
  %v3 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * null,
                      <4 x i64> %ptrs_3, <4 x i64> %vecmask_3, i8 1)
  %v4 = call <4 x i64> @llvm.x86.avx2.gather.q.q.256(<4 x i64> undef, i8 * null,
                      <4 x i64> %ptrs_4, <4 x i64> %vecmask_4, i8 1)

  assemble_4s(i64, v, v1, v2, v3, v4)

  ret <16 x i64> %v
}

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; double gathers

declare <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> %target, i8 * %ptr,
                       <4 x i64> %indices, <4 x double> %mask, i8 %scale) readonly nounwind
declare <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> %target, i8 * %ptr,
                       <4 x i32> %indices, <4 x double> %mask, i8 %scale) readonly nounwind

define <16 x double> @__gather_base_offsets32_double(i8 * %ptr,
                             i32 %scale, <16 x i32> %offsets,
                             <16 x i32> %mask32) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  %vecmask64 = sext <16 x i32> %mask32 to <16 x i64>
  %vecmask = bitcast <16 x i64> %vecmask64 to <16 x double>
  extract_4s(i32, offsets)
  extract_4s(double, vecmask)

  %v1 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * %ptr,
                             <4 x i32> %offsets_1, <4 x double> %vecmask_1, i8 %scale8)
  %v2 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * %ptr,
                             <4 x i32> %offsets_2, <4 x double> %vecmask_2, i8 %scale8)
  %v3 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * %ptr,
                             <4 x i32> %offsets_3, <4 x double> %vecmask_3, i8 %scale8)
  %v4 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * %ptr,
                             <4 x i32> %offsets_4, <4 x double> %vecmask_4, i8 %scale8)

  assemble_4s(double, v, v1, v2, v3, v4)

  ret <16 x double> %v
}


define <16 x double> @__gather_base_offsets64_double(i8 * %ptr,
                             i32 %scale, <16 x i64> %offsets,
                             <16 x i32> %mask32) nounwind readonly alwaysinline {
  %scale8 = trunc i32 %scale to i8
  %vecmask64 = sext <16 x i32> %mask32 to <16 x i64>
  %vecmask = bitcast <16 x i64> %vecmask64 to <16 x double>
  extract_4s(i64, offsets)
  extract_4s(double, vecmask)

  %v1 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * %ptr, 
                      <4 x i64> %offsets_1, <4 x double> %vecmask_1, i8 %scale8)
  %v2 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * %ptr, 
                      <4 x i64> %offsets_2, <4 x double> %vecmask_2, i8 %scale8)
  %v3 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * %ptr, 
                      <4 x i64> %offsets_3, <4 x double> %vecmask_3, i8 %scale8)
  %v4 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * %ptr, 
                      <4 x i64> %offsets_4, <4 x double> %vecmask_4, i8 %scale8)

  assemble_4s(double, v, v1, v2, v3, v4)

  ret <16 x double> %v
}


define <16 x double> @__gather32_double(<16 x i32> %ptrs, 
                                        <16 x i32> %mask32) nounwind readonly alwaysinline {
  %vecmask64 = sext <16 x i32> %mask32 to <16 x i64>
  %vecmask = bitcast <16 x i64> %vecmask64 to <16 x double>
  extract_4s(i32, ptrs)
  extract_4s(double, vecmask)

  %v1 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * null,
                      <4 x i32> %ptrs_1, <4 x double> %vecmask_1, i8 1)
  %v2 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * null,
                      <4 x i32> %ptrs_2, <4 x double> %vecmask_2, i8 1)
  %v3 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * null,
                      <4 x i32> %ptrs_3, <4 x double> %vecmask_3, i8 1)
  %v4 = call <4 x double> @llvm.x86.avx2.gather.d.pd.256(<4 x double> undef, i8 * null,
                      <4 x i32> %ptrs_4, <4 x double> %vecmask_4, i8 1)

  assemble_4s(double, v, v1, v2, v3, v4)

  ret <16 x double> %v
}


define <16 x double> @__gather64_double(<16 x i64> %ptrs, 
                                        <16 x i32> %mask32) nounwind readonly alwaysinline {
  %vecmask64 = sext <16 x i32> %mask32 to <16 x i64>
  %vecmask = bitcast <16 x i64> %vecmask64 to <16 x double>
  extract_4s(i64, ptrs)
  extract_4s(double, vecmask)

  %v1 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * null,
                      <4 x i64> %ptrs_1, <4 x double> %vecmask_1, i8 1)
  %v2 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * null,
                      <4 x i64> %ptrs_2, <4 x double> %vecmask_2, i8 1)
  %v3 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * null,
                      <4 x i64> %ptrs_3, <4 x double> %vecmask_3, i8 1)
  %v4 = call <4 x double> @llvm.x86.avx2.gather.q.pd.256(<4 x double> undef, i8 * null,
                      <4 x i64> %ptrs_4, <4 x double> %vecmask_4, i8 1)

  assemble_4s(double, v, v1, v2, v3, v4)

  ret <16 x double> %v
}