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Revert "target-alpha: Add vector implementation for CMPBGE"

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This reverts commit 32ad48abd74a997220b841e4e913edeb267aa362.

Unfortunately the SSE2 code here fails to compile on some versions
of gcc:
 target-alpha/int_helper.c:77:24: error: invalid operands to binary >=
 (have '__vector(16) unsigned char' and '__vector(16) unsigned char')

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2015-05-22 12:30:13 +01:00
parent 27e1259a69
commit f5790c3bc8
1 changed files with 0 additions and 37 deletions
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37
target-alpha/int_helper.c
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@ -60,42 +60,6 @@ uint64_t helper_zap(uint64_t val, uint64_t mask)
uint64_t helper_cmpbge(uint64_t op1, uint64_t op2) uint64_t helper_cmpbge(uint64_t op1, uint64_t op2)
{ {
#if defined(__SSE2__)
uint64_t r;
/* The cmpbge instruction is heavily used in the implementation of
every string function on Alpha. We can do much better than either
the default loop below, or even an unrolled version by using the
native vector support. */
{
typedef uint64_t Q __attribute__((vector_size(16)));
typedef uint8_t B __attribute__((vector_size(16)));
Q q1 = (Q){ op1, 0 };
Q q2 = (Q){ op2, 0 };
q1 = (Q)((B)q1 >= (B)q2);
r = q1[0];
}
/* Select only one bit from each byte. */
r &= 0x0101010101010101;
/* Collect the bits into the bottom byte. */
/* .......A.......B.......C.......D.......E.......F.......G.......H */
r |= r >> (8 - 1);
/* .......A......AB......BC......CD......DE......EF......FG......GH */
r |= r >> (16 - 2);
/* .......A......AB.....ABC....ABCD....BCDE....CDEF....DEFG....EFGH */
r |= r >> (32 - 4);
/* .......A......AB.....ABC....ABCD...ABCDE..ABCDEF.ABCDEFGABCDEFGH */
/* Return only the low 8 bits. */
return r & 0xff;
#else
uint8_t opa, opb, res; uint8_t opa, opb, res;
int i; int i;
@ -108,7 +72,6 @@ uint64_t helper_cmpbge(uint64_t op1, uint64_t op2)
} }
} }
return res; return res;
#endif
} }
uint64_t helper_minub8(uint64_t op1, uint64_t op2) uint64_t helper_minub8(uint64_t op1, uint64_t op2)