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https://github.com/xen-project/xen.git
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Jan Beulich
15a3314bd6
As to the feature dependency adjustment, while strictly speaking SSE is a sufficient prereq (to have XMM registers), vectors of bytes and qwords have got introduced only with SSE2. gcc, for example, uses a similar connection in its respective intrinsics header. Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
#define UINT_SIZE 1
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#include "simd.h"
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ENTRY(gf_test);
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#if VEC_SIZE == 16
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# define GF(op, s, a...) __builtin_ia32_vgf2p8 ## op ## _v16qi ## s(a)
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#elif VEC_SIZE == 32
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# define GF(op, s, a...) __builtin_ia32_vgf2p8 ## op ## _v32qi ## s(a)
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#elif VEC_SIZE == 64
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# define GF(op, s, a...) __builtin_ia32_vgf2p8 ## op ## _v64qi ## s(a)
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#endif
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#ifdef __AVX512BW__
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# define ALL_TRUE (~0ULL >> (64 - ELEM_COUNT))
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# define eq(x, y) (B(pcmpeqb, _mask, (vqi_t)(x), (vqi_t)(y), -1) == ALL_TRUE)
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# define mul(x, y) GF(mulb, _mask, (vqi_t)(x), (vqi_t)(y), (vqi_t)undef(), ~0)
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# define transform(m, dir, x, c) ({ \
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vec_t t_; \
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asm ( "vgf2p8affine" #dir "qb %[imm], %[matrix]%{1to%c[n]%}, %[src], %[dst]" \
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: [dst] "=v" (t_) \
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: [matrix] "m" (m), [src] "v" (x), [imm] "i" (c), [n] "i" (VEC_SIZE / 8) ); \
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t_; \
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})
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#else
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# if defined(__AVX2__)
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# define bcstq(x) ({ \
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vdi_t t_; \
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asm ( "vpbroadcastq %1, %0" : "=x" (t_) : "m" (x) ); \
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t_; \
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})
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# define to_bool(cmp) B(ptestc, , cmp, (vdi_t){} == 0)
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# else
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# define bcstq(x) ((vdi_t){x, x})
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# define to_bool(cmp) (__builtin_ia32_pmovmskb128(cmp) == 0xffff)
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# endif
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# define eq(x, y) to_bool((x) == (y))
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# define mul(x, y) GF(mulb, , (vqi_t)(x), (vqi_t)(y))
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# define transform(m, dir, x, c) ({ \
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vdi_t m_ = bcstq(m); \
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touch(m_); \
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((vec_t)GF(affine ## dir ## qb, , (vqi_t)(x), (vqi_t)m_, c)); \
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})
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#endif
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const unsigned __attribute__((mode(DI))) ident = 0x0102040810204080ULL;
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int gf_test(void)
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{
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unsigned int i;
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vec_t src, one;
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for ( i = 0; i < ELEM_COUNT; ++i )
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{
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src[i] = i;
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one[i] = 1;
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}
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/* Special case for first iteration. */
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one[0] = 0;
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do {
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vec_t inv = transform(ident, inv, src, 0);
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touch(src);
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touch(inv);
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if ( !eq(mul(src, inv), one) ) return __LINE__;
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touch(src);
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touch(inv);
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if ( !eq(mul(inv, src), one) ) return __LINE__;
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one[0] = 1;
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src += ELEM_COUNT;
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i += ELEM_COUNT;
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} while ( i < 256 );
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return 0;
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}
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