63 lines
2.6 KiB
Plaintext
63 lines
2.6 KiB
Plaintext
Date: Mon, 28 Aug 1995 23:53:23 CET +0100
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From: "Christian Spieler, Institut fuer Kernphysik, Schlossgartenstr. 9,
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D-64289 Darmstadt" <SPIELER@linac.ikp.physik.th-darmstadt.de>
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Subject: More MSC 5.1 related patches for UnZip 5.20f2
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D) I want to suggest two small patches to allow the use of
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full optimization (including loop optimization) when compiling UnZip
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with MSC (5.1, and probably newer). There are only two small pieces
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of code (containing to deeply nested loops) that break MSC 5.1's loop
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optimization. I have guarded these loops with "#pragma loop_opt (off)"
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to allow loop optimization for the rest of the code. Here are the patches:
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===================== cut here ========================
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diff -c ./inflate.c ./modif/inflate.c
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*** ./inflate.c Thu Oct 05 14:57:38 1995
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--- ./modif/inflate.c Thu Oct 05 14:58:24 1995
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***************
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*** 1162,1173 ****
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--- 1162,1179 ----
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{ /* too few codes for k-w bit table */
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f -= a + 1; /* deduct codes from patterns left */
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xp = c + k;
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+ #if defined (MSC)
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+ #pragma loop_opt (off)
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+ #endif /* MS C compilers */
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while (++j < z) /* try smaller tables up to z bits */
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{
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if ((f <<= 1) <= *++xp)
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break; /* enough codes to use up j bits */
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f -= *xp; /* else deduct codes from patterns */
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}
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+ #if defined (MSC)
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+ #pragma loop_opt ()
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+ #endif /* MS C compilers */
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}
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if ((unsigned)w + j > el && (unsigned)w < el)
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j = el - w; /* make EOB code end at table */
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diff -c ./zipinfo.c ./modif/zipinfo.c
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*** ./zipinfo.c Thu Oct 05 14:51:58 1995
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--- ./modif/zipinfo.c Thu Oct 05 14:52:42 1995
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***************
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*** 1134,1145 ****
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--- 1134,1151 ----
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workspace[10] = 'E';
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p = attribs;
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+ #if defined (MSC) && (!defined (_MSC_VER) || _MSC_VER < 600)
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+ #pragma loop_opt (off)
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+ #endif /* MS C, Version < 6.00 */
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for (k = j = 0; j < 3; ++j) { /* groups of permissions */
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for (i = 0; i < 4; ++i, ++k) /* perms within a group */
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if (workspace[k])
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*p++ = workspace[k];
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*p++ = ','; /* group separator */
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}
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+ #if defined (MSC) && (!defined (_MSC_VER) || _MSC_VER < 600)
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+ #pragma loop_opt ()
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+ #endif /* MS C, Version < 6.00 */
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*--p = ' '; /* overwrite last comma */
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if ((p - attribs) < 12)
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sprintf(&attribs[12], "%d.%d", hostver/10, hostver%10);
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