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Code Issues Releases Wiki Activity

Replace bitwise swaps with rotate() versions for AMD

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This commit is contained in:
jsteube 2017-07-23 17:01:15 +02:00
parent 3125a756d9
commit 9562d07264
1 changed files with 12 additions and 14 deletions
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26
OpenCL/inc_types.cl
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@ -176,12 +176,16 @@ u64x hl32_to_64 (const u32x a, const u32x b)
#ifdef IS_AMD
u32 swap32_S (const u32 v)
{
return (as_uint (as_uchar4 (v).s3210));
return bitselect (rotate (v, 24u), rotate (v, 8u), 0x00ff00ffu);
}
u64 swap64_S (const u64 v)
{
return (as_ulong (as_uchar8 (v).s76543210));
return bitselect (bitselect (rotate (v, 24ul),
rotate (v, 8ul), 0x000000ff000000fful),
bitselect (rotate (v, 56ul),
rotate (v, 40ul), 0x00ff000000ff0000ul),
0xffff0000ffff0000ul);
}
u32 rotr32_S (const u32 a, const u32 n)
@ -206,22 +210,16 @@ u64 rotl64_S (const u64 a, const u32 n)
u32x swap32 (const u32x v)
{
return ((v >> 24) & 0x000000ff)
| ((v >> 8) & 0x0000ff00)
| ((v << 8) & 0x00ff0000)
| ((v << 24) & 0xff000000);
return bitselect (rotate (v, 24u), rotate (v, 8u), 0x00ff00ffu);
}
u64x swap64 (const u64x v)
{
return ((v >> 56) & 0x00000000000000ff)
| ((v >> 40) & 0x000000000000ff00)
| ((v >> 24) & 0x0000000000ff0000)
| ((v >> 8) & 0x00000000ff000000)
| ((v << 8) & 0x000000ff00000000)
| ((v << 24) & 0x0000ff0000000000)
| ((v << 40) & 0x00ff000000000000)
| ((v << 56) & 0xff00000000000000);
return bitselect (bitselect (rotate (v, 24ul),
rotate (v, 8ul), 0x000000ff000000fful),
bitselect (rotate (v, 56ul),
rotate (v, 40ul), 0x00ff000000ff0000ul),
0xffff0000ffff0000ul);
}
u32x rotr32 (const u32x a, const u32 n)