From: lkcl <lkcl@web>
Date: Sun, 13 Mar 2022 22:22:07 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~3065
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0c4414cfa64b98cd297d525dab274950781e2a1f;p=libreriscv.git

---

diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn
index ea0c3916e..a72b06114 100644
--- a/openpower/sv/bitmanip.mdwn
+++ b/openpower/sv/bitmanip.mdwn
@@ -140,10 +140,7 @@ double check that instructions didn't need 3 inputs.
 | NN | RA | RB  | RC  | 0  | 01    | 0110 110 |Rc| grevw |
 | NN | RA | RB  | sh  | 0  | 01    | 1110 110 |Rc| grevwi |
 | NN | RA | RB  | RC  | 1  | 01    | 1110 110 |Rc| bmatxor   |
-| NN | RA | RB  | RC  | 0  | 10    | 0010 110 |Rc| shfl |
-| NN | RA | RB  | sh  | SH | 10    | 1010 110 |Rc| shfli |
-| NN | RA | RB  | RC  | 0  | 10    | 0110 110 |Rc| shflw |
-| NN | RA | RB  | RC  |    | 10    | 1110 110 |Rc| rsvd    |
+| NN | RA | RB  | RC  |    | 10    | --10 110 |Rc| rsvd  |
 | NN | RA | RB  | RC  | 0  | 11    | 1110 110 |Rc| clmulr  |
 | NN | RA | RB  | RC  | 1  | 11    | 1110 110 |Rc| clmulh  |
 | NN |    |     |     |    |       | --11 110 |Rc| setvl  |
@@ -436,72 +433,6 @@ uint64_t grev64(uint64_t RA, uint64_t RB)
 
 ```
 
-# shuffle / unshuffle
-
-based on RV bitmanip
-
-```
-uint32_t shfl32(uint32_t RA, uint32_t RB)
-{
-    uint32_t x = RA;
-    int shamt = RB & 15;
-    if (shamt & 8) x  = shuffle32_stage(x, 0x00ff0000, 0x0000ff00, 8);
-    if (shamt & 4) x  = shuffle32_stage(x, 0x0f000f00, 0x00f000f0, 4);
-    if (shamt & 2) x  = shuffle32_stage(x, 0x30303030, 0x0c0c0c0c, 2);
-    if (shamt & 1) x  = shuffle32_stage(x, 0x44444444, 0x22222222, 1);
-    return x;
-}
-uint32_t unshfl32(uint32_t RA, uint32_t RB)
-{
-    uint32_t x = RA;
-    int shamt = RB & 15;
-    if (shamt & 1) x  = shuffle32_stage(x, 0x44444444, 0x22222222, 1);
-    if (shamt & 2) x  = shuffle32_stage(x, 0x30303030, 0x0c0c0c0c, 2);
-    if (shamt & 4) x  = shuffle32_stage(x, 0x0f000f00, 0x00f000f0, 4);
-    if (shamt & 8) x  = shuffle32_stage(x, 0x00ff0000, 0x0000ff00, 8);
-    return x;
-}
-
-uint64_t shuffle64_stage(uint64_t src, uint64_t maskL, uint64_t maskR, int N)
-{
-    uint64_t x = src & ~(maskL | maskR);
-    x |= ((src << N) & maskL) | ((src >> N) & maskR);
-    return x;
-}
-uint64_t shfl64(uint64_t RA, uint64_t RB)
-{
-    uint64_t x = RA;
-    int shamt = RB & 31;
-    if (shamt & 16) x = shuffle64_stage(x, 0x0000ffff00000000LL,
-                                           0x00000000ffff0000LL, 16);
-    if (shamt & 8) x = shuffle64_stage(x, 0x00ff000000ff0000LL,
-                                           0x0000ff000000ff00LL, 8);
-    if (shamt & 4) x = shuffle64_stage(x, 0x0f000f000f000f00LL,
-                                           0x00f000f000f000f0LL, 4);
-    if (shamt & 2) x = shuffle64_stage(x, 0x3030303030303030LL,
-                                           0x0c0c0c0c0c0c0c0cLL, 2);
-    if (shamt & 1) x = shuffle64_stage(x, 0x4444444444444444LL,
-                                           0x2222222222222222LL, 1);
-    return x;
-}
-uint64_t unshfl64(uint64_t RA, uint64_t RB)
-{
-    uint64_t x = RA;
-    int shamt = RB & 31;
-    if (shamt &  1) x = shuffle64_stage(x, 0x4444444444444444LL,
-                                           0x2222222222222222LL, 1);
-    if (shamt &  2) x = shuffle64_stage(x, 0x3030303030303030LL,
-                                           0x0c0c0c0c0c0c0c0cLL, 2);
-    if (shamt &  4) x = shuffle64_stage(x, 0x0f000f000f000f00LL,
-                                           0x00f000f000f000f0LL, 4);
-    if (shamt &  8) x = shuffle64_stage(x, 0x00ff000000ff0000LL,
-                                           0x0000ff000000ff00LL, 8);
-    if (shamt & 16) x = shuffle64_stage(x, 0x0000ffff00000000LL,
-                                           0x00000000ffff0000LL, 16);
-    return x;
-}
-```
-
 # xperm
 
 based on RV bitmanip.