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111
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1 /* { dg-do compile } */
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131
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2 /* { dg-require-effective-target bswap } */
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111
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3 /* { dg-require-effective-target stdint_types } */
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4 /* { dg-options "-O2 -fdump-tree-bswap" } */
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5 /* { dg-additional-options "-mzarch" { target s390*-*-* } } */
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6
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7 #include <stdint.h>
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8
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9 /* A variant via unsigned short. */
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10
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11 uint64_t
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12 swap64_c (uint64_t x)
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13 {
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14 uint16_t a0 = x >> 48;
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15 uint16_t a1 = x >> 32;
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16 uint16_t a2 = x >> 16;
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17 uint16_t a3 = x;
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18
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19 return ((uint64_t) (((a0 >> 8) & 0xff) | ((a0 << 8) & 0xff00)))
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20 | ((uint64_t) (((a1 >> 8) & 0xff) | ((a1 << 8) & 0xff00)) << 16)
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21 | ((uint64_t) (((a2 >> 8) & 0xff) | ((a2 << 8) & 0xff00)) << 32)
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22 | ((uint64_t) (((a3 >> 8) & 0xff) | ((a3 << 8) & 0xff00)) << 48);
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23 }
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24
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25
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26 /* { dg-final { scan-tree-dump-times "64 bit bswap implementation found at" 1 "bswap" } } */
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