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IJG R6b with x86SIMD V1.02

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Independent JPEG Group's JPEG software release 6b
with x86 SIMD extension for IJG JPEG library version 1.02
This commit is contained in:
MIYASAKA Masaru
2006-02-04 00:00:00 +00:00
committed by DRC
parent 5ead57a34a
commit a2e6a9dd47
156 changed files with 49018 additions and 4283 deletions
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58
jcomapi.c
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@@ -5,6 +5,13 @@
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* ---------------------------------------------------------------------
* x86 SIMD extension for IJG JPEG library
* Copyright (C) 1999-2006, MIYASAKA Masaru.
* This file has been modified for SIMD extension.
* Last Modified : March 11, 2005
* ---------------------------------------------------------------------
*
* This file contains application interface routines that are used for both
* compression and decompression.
*/
@@ -104,3 +111,54 @@ jpeg_alloc_huff_table (j_common_ptr cinfo)
tbl->sent_table = FALSE; /* make sure this is false in any new table */
return tbl;
}
/*
* SIMD Ext: Checking for support of SIMD instruction set.
*/
GLOBAL(unsigned int)
jpeg_simd_support (j_common_ptr cinfo)
{
enum { JSIMD_INVALID = ~0 };
static volatile unsigned int simd_supported = JSIMD_INVALID;
if (simd_supported == JSIMD_INVALID)
simd_supported = jpeg_simd_os_support(jpeg_simd_cpu_support());
#ifndef JSIMD_MASKFUNC_NOT_SUPPORTED
if (cinfo != NULL) /* Turn off the masked flags */
return simd_supported & ~jpeg_simd_mask(cinfo, JSIMD_NONE, JSIMD_NONE);
#endif
return simd_supported;
}
#ifndef JSIMD_MASKFUNC_NOT_SUPPORTED
/*
* SIMD Ext: modify/retrieve SIMD instruction mask
*/
GLOBAL(unsigned int)
jpeg_simd_mask (j_common_ptr cinfo, unsigned int remove, unsigned int add)
{
unsigned long *gp;
unsigned int oldmask;
if (cinfo->is_decompressor)
gp = (unsigned long *) &((j_decompress_ptr) cinfo)->output_gamma;
else /* compressor */
gp = (unsigned long *) &((j_compress_ptr) cinfo)->input_gamma;
if ((gp[1] == 0x3FF00000 || gp[1] == 0x00000000) && /* +1.0 or +0.0 */
(gp[0] & ~JSIMD_ALL) == 0) {
oldmask = gp[0];
if (((remove | add) & ~JSIMD_ALL) == 0)
gp[0] = (oldmask & ~remove) | add;
} else {
oldmask = 0; /* error */
}
return oldmask;
}
#endif /* !JSIMD_MASKFUNC_NOT_SUPPORTED */