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6e38d50829
word_swap_page() should only touch each 32-bit word once to change the byte order from ABCD to DCBA rather than twice doing a transform of the entire region from ABCD to BADC and then again to DCBA The compiler provided ntohl() usually gets favorable optimizations applied, so use it for the byte reordering. With word_swap_page() rewritten, byte_swap_word() is superfluous.
19 lines
747 B
C
19 lines
747 B
C
#ifndef BYTESWAPDEFS_H
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#define BYTESWAPDEFS_H 1
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/****************************************************************/
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/* */
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/* swap halves of a single 4-byte word */
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/* */
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/****************************************************************/
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static inline unsigned int swapx(unsigned int word) {
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return (((word >> 16) & 0xffff) | ((word & 0xffff) << 16));
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}
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void word_swap_page(unsigned short *page, int longwordcount);
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void bit_reverse_region(unsigned short *top, int width, int height, int rasterwidth);
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#ifdef RESWAPPEDCODESTREAM
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unsigned int byte_swap_code_block(unsigned int *base);
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#endif
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#endif
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