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target-arm: Use new revbit functions

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Backports commit 42fedbca8f5b54324ed89be3484d4a3dc9946387 from qemu
This commit is contained in:
Lioncash 2018-02-11 01:56:37 -05:00
parent a5d6a31d69
commit 3791fc69fd
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 2 additions and 25 deletions
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15
qemu/target-arm/helper-a64.c
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@ -68,20 +68,7 @@ uint32_t HELPER(clz32)(uint32_t x)
uint64_t HELPER(rbit64)(uint64_t x)
{
/* assign the correct byte position */
x = bswap64(x);
/* assign the correct nibble position */
x = ((x & 0xf0f0f0f0f0f0f0f0ULL) >> 4)
| ((x & 0x0f0f0f0f0f0f0f0fULL) << 4);
/* assign the correct bit position */
x = ((x & 0x8888888888888888ULL) >> 3)
| ((x & 0x4444444444444444ULL) >> 1)
| ((x & 0x2222222222222222ULL) << 1)
| ((x & 0x1111111111111111ULL) << 3);
return x;
return revbit64(x);
}
/* Convert a softfloat float_relation_ (as returned by

12
qemu/target-arm/helper.c
View file

@ -3146,17 +3146,7 @@ uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
uint32_t HELPER(rbit)(uint32_t x)
{
x = ((x & 0xff000000) >> 24)
| ((x & 0x00ff0000) >> 8)
| ((x & 0x0000ff00) << 8)
| ((x & 0x000000ff) << 24);
x = ((x & 0xf0f0f0f0) >> 4)
| ((x & 0x0f0f0f0f) << 4);
x = ((x & 0x88888888) >> 3)
| ((x & 0x44444444) >> 1)
| ((x & 0x22222222) << 1)
| ((x & 0x11111111) << 3);
return x;
return revbit32(x);
}
#if defined(CONFIG_USER_ONLY)