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52 lines
1 KiB
Text
52 lines
1 KiB
Text
#ifdef __powerpc__
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#define VMX_ALIGN 16
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#define VMX_ALIGN_MASK (VMX_ALIGN-1)
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static unsigned int crc32_align(unsigned int crc, unsigned char *p,
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unsigned long len)
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{
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while (len--)
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crc = crc_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
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return crc;
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}
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unsigned int __F(unsigned int crc, unsigned char *p,
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unsigned long len);
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unsigned int F(unsigned int crc, unsigned char *p,
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unsigned long len)
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{
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unsigned int prealign;
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unsigned int tail;
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crc ^= 0xffffffff;
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if (len < VMX_ALIGN + VMX_ALIGN_MASK) {
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crc = crc32_align(crc, p, len);
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goto out;
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}
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if ((unsigned long)p & VMX_ALIGN_MASK) {
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prealign = VMX_ALIGN - ((unsigned long)p & VMX_ALIGN_MASK);
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crc = crc32_align(crc, p, prealign);
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len -= prealign;
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p += prealign;
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}
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crc = __F(crc, p, len & ~VMX_ALIGN_MASK);
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tail = len & VMX_ALIGN_MASK;
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if (tail) {
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p += len & ~VMX_ALIGN_MASK;
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crc = crc32_align(crc, p, tail);
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}
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out:
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crc ^= 0xffffffff;
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return crc;
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}
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#endif /* __powerpc__ */
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