1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
//! PowerPC Vector Scalar eXtensions (VSX) intrinsics.
//!
//! The references are: [POWER ISA v2.07B (for POWER8 & POWER8 with NVIDIA
//! NVlink)] and [POWER ISA v3.0B (for POWER9)].
//!
//! [POWER ISA v2.07B (for POWER8 & POWER8 with NVIDIA NVlink)]: https://ibm.box.com/s/jd5w15gz301s5b5dt375mshpq9c3lh4u
//! [POWER ISA v3.0B (for POWER9)]: https://ibm.box.com/s/1hzcwkwf8rbju5h9iyf44wm94amnlcrv

#![allow(non_camel_case_types)]

use crate::core_arch::powerpc::*;

#[cfg(test)]
use stdarch_test::assert_instr;

use crate::mem::transmute;

types! {
    #![unstable(feature = "stdarch_powerpc", issue = "111145")]

    // pub struct vector_Float16 = f16x8;
    /// PowerPC-specific 128-bit wide vector of two packed `i64`
    pub struct vector_signed_long(2 x i64);
    /// PowerPC-specific 128-bit wide vector of two packed `u64`
    pub struct vector_unsigned_long(2 x u64);
    /// PowerPC-specific 128-bit wide vector mask of two `i64`
    pub struct vector_bool_long(2 x i64);
    /// PowerPC-specific 128-bit wide vector of two packed `f64`
    pub struct vector_double(2 x f64);
    // pub struct vector_signed_long_long = vector_signed_long;
    // pub struct vector_unsigned_long_long = vector_unsigned_long;
    // pub struct vector_bool_long_long = vector_bool_long;
    // pub struct vector_signed___int128 = i128x1;
    // pub struct vector_unsigned___int128 = i128x1;
}

#[allow(improper_ctypes)]
extern "C" {
    #[link_name = "llvm.ppc.altivec.vperm"]
    fn vperm(
        a: vector_signed_int,
        b: vector_signed_int,
        c: vector_unsigned_char,
    ) -> vector_signed_int;
}

mod sealed {
    use super::*;
    use crate::core_arch::simd::*;

    #[unstable(feature = "stdarch_powerpc", issue = "111145")]
    pub trait VectorPermDI {
        #[unstable(feature = "stdarch_powerpc", issue = "111145")]
        unsafe fn vec_xxpermdi(self, b: Self, dm: u8) -> Self;
    }

    // xxpermdi has an big-endian bias and extended mnemonics
    #[inline]
    #[target_feature(enable = "vsx")]
    #[cfg_attr(all(test, target_endian = "little"), assert_instr(xxmrgld, dm = 0x0))]
    #[cfg_attr(all(test, target_endian = "big"), assert_instr(xxspltd, dm = 0x0))]
    unsafe fn xxpermdi(a: vector_signed_long, b: vector_signed_long, dm: u8) -> vector_signed_long {
        let a: i64x2 = transmute(a);
        let b: i64x2 = transmute(b);
        let r: i64x2 = match dm & 0b11 {
            0 => simd_shuffle!(a, b, [0b00, 0b10]),
            1 => simd_shuffle!(a, b, [0b01, 0b10]),
            2 => simd_shuffle!(a, b, [0b00, 0b11]),
            _ => simd_shuffle!(a, b, [0b01, 0b11]),
        };
        transmute(r)
    }

    macro_rules! vec_xxpermdi {
        {$impl: ident} => {
            #[unstable(feature = "stdarch_powerpc", issue = "111145")]
            impl VectorPermDI for $impl {
                #[inline]
                #[target_feature(enable = "vsx")]
                unsafe fn vec_xxpermdi(self, b: Self, dm: u8) -> Self {
                    transmute(xxpermdi(transmute(self), transmute(b), dm))
                }
            }
        }
    }

    vec_xxpermdi! { vector_unsigned_long }
    vec_xxpermdi! { vector_signed_long }
    vec_xxpermdi! { vector_bool_long }
    vec_xxpermdi! { vector_double }

    #[unstable(feature = "stdarch_powerpc", issue = "111145")]
    pub trait VectorMergeEo {
        #[unstable(feature = "stdarch_powerpc", issue = "111145")]
        unsafe fn vec_mergee(self, b: Self) -> Self;
        #[unstable(feature = "stdarch_powerpc", issue = "111145")]
        unsafe fn vec_mergeo(self, b: Self) -> Self;
    }

    #[inline]
    #[target_feature(enable = "altivec")]
    #[cfg_attr(
        all(test, target_endian = "little", target_feature = "power8-vector"),
        assert_instr(vmrgow)
    )]
    #[cfg_attr(
        all(test, target_endian = "big", target_feature = "power8-vector"),
        assert_instr(vmrgew)
    )]
    unsafe fn mergee(a: vector_signed_int, b: vector_signed_int) -> vector_signed_int {
        let p = transmute(u8x16::new(
            0x00, 0x01, 0x02, 0x03, 0x10, 0x11, 0x12, 0x13, 0x08, 0x09, 0x0A, 0x0B, 0x18, 0x19,
            0x1A, 0x1B,
        ));
        vec_perm(a, b, p)
    }

    #[inline]
    #[target_feature(enable = "altivec")]
    #[cfg_attr(
        all(test, target_endian = "little", target_feature = "power8-vector"),
        assert_instr(vmrgew)
    )]
    #[cfg_attr(
        all(test, target_endian = "big", target_feature = "power8-vector"),
        assert_instr(vmrgow)
    )]
    unsafe fn mergeo(a: vector_signed_int, b: vector_signed_int) -> vector_signed_int {
        let p = transmute(u8x16::new(
            0x04, 0x05, 0x06, 0x07, 0x14, 0x15, 0x16, 0x17, 0x0C, 0x0D, 0x0E, 0x0F, 0x1C, 0x1D,
            0x1E, 0x1F,
        ));
        vec_perm(a, b, p)
    }

    macro_rules! vec_mergeeo {
        { $impl: ident, $even: ident, $odd: ident } => {
            #[unstable(feature = "stdarch_powerpc", issue = "111145")]
            impl VectorMergeEo for $impl {
                #[inline]
                #[target_feature(enable = "altivec")]
                unsafe fn vec_mergee(self, b: Self) -> Self {
                    transmute(mergee(transmute(self), transmute(b)))
                }
                #[inline]
                #[target_feature(enable = "altivec")]
                unsafe fn vec_mergeo(self, b: Self) -> Self {
                    transmute(mergeo(transmute(self), transmute(b)))
                }
            }
        }
    }

    vec_mergeeo! { vector_signed_int, mergee, mergeo }
    vec_mergeeo! { vector_unsigned_int, mergee, mergeo }
    vec_mergeeo! { vector_bool_int, mergee, mergeo }
    vec_mergeeo! { vector_float, mergee, mergeo }
}

/// Vector permute.
#[inline]
#[target_feature(enable = "vsx")]
//#[rustc_legacy_const_generics(2)]
#[unstable(feature = "stdarch_powerpc", issue = "111145")]
pub unsafe fn vec_xxpermdi<T, const DM: i32>(a: T, b: T) -> T
where
    T: sealed::VectorPermDI,
{
    static_assert_uimm_bits!(DM, 2);
    a.vec_xxpermdi(b, DM as u8)
}

/// Vector Merge Even
///
/// ## Purpose
/// Merges the even-numbered values from two vectors.
///
/// ## Result value
/// The even-numbered elements of a are stored into the even-numbered elements of r.
/// The even-numbered elements of b are stored into the odd-numbered elements of r.
#[inline]
#[target_feature(enable = "altivec")]
#[unstable(feature = "stdarch_powerpc", issue = "111145")]
pub unsafe fn vec_mergee<T>(a: T, b: T) -> T
where
    T: sealed::VectorMergeEo,
{
    a.vec_mergee(b)
}

/// Vector Merge Odd
///
/// ## Purpose
/// Merges the odd-numbered values from two vectors.
///
/// ## Result value
/// The odd-numbered elements of a are stored into the even-numbered elements of r.
/// The odd-numbered elements of b are stored into the odd-numbered elements of r.
#[inline]
#[target_feature(enable = "altivec")]
#[unstable(feature = "stdarch_powerpc", issue = "111145")]
pub unsafe fn vec_mergeo<T>(a: T, b: T) -> T
where
    T: sealed::VectorMergeEo,
{
    a.vec_mergeo(b)
}

#[cfg(test)]
mod tests {
    #[cfg(target_arch = "powerpc")]
    use crate::core_arch::arch::powerpc::*;

    #[cfg(target_arch = "powerpc64")]
    use crate::core_arch::arch::powerpc64::*;

    use crate::core_arch::simd::*;
    use crate::mem::transmute;
    use stdarch_test::simd_test;

    macro_rules! test_vec_xxpermdi {
        {$name:ident, $shorttype:ident, $longtype:ident, [$($a:expr),+], [$($b:expr),+], [$($c:expr),+], [$($d:expr),+]} => {
            #[simd_test(enable = "vsx")]
            unsafe fn $name() {
                let a: $longtype = transmute($shorttype::new($($a),+, $($b),+));
                let b = transmute($shorttype::new($($c),+, $($d),+));

                assert_eq!($shorttype::new($($a),+, $($c),+), transmute(vec_xxpermdi::<_, 0>(a, b)));
                assert_eq!($shorttype::new($($b),+, $($c),+), transmute(vec_xxpermdi::<_, 1>(a, b)));
                assert_eq!($shorttype::new($($a),+, $($d),+), transmute(vec_xxpermdi::<_, 2>(a, b)));
                assert_eq!($shorttype::new($($b),+, $($d),+), transmute(vec_xxpermdi::<_, 3>(a, b)));
            }
        }
    }

    test_vec_xxpermdi! {test_vec_xxpermdi_u64x2, u64x2, vector_unsigned_long, [0], [1], [2], [3]}
    test_vec_xxpermdi! {test_vec_xxpermdi_i64x2, i64x2, vector_signed_long, [0], [-1], [2], [-3]}
    test_vec_xxpermdi! {test_vec_xxpermdi_m64x2, m64x2, vector_bool_long, [false], [true], [false], [true]}
    test_vec_xxpermdi! {test_vec_xxpermdi_f64x2, f64x2, vector_double, [0.0], [1.0], [2.0], [3.0]}
}