Update of /cvsroot/alsa/alsa-lib/src/pcm
In directory sc8-pr-cvs1:/tmp/cvs-serv11956
Modified Files:
pcm_dmix_i386.h
Log Message:
fixed 32bit sample dmix code for i386.
Index: pcm_dmix_i386.h
===================================================================
RCS file: /cvsroot/alsa/alsa-lib/src/pcm/pcm_dmix_i386.h,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -r1.7 -r1.8
--- pcm_dmix_i386.h 18 Mar 2003 18:00:20 -0000 1.7
+++ pcm_dmix_i386.h 17 Sep 2003 15:39:12 -0000 1.8
@@ -288,11 +288,15 @@
"\t" LOCK_PREFIX "cmpxchgl %%ecx, (%%edi)\n"
"\tjnz 2f\n"
"\tmovl (%%esi), %%ecx\n"
- "\tshr $8, %%ecx\n"
+ /* sample >>= 8 */
+ "\tsarl $8, %%ecx\n"
"\tsubl %%edx, %%ecx\n"
+ "\tjmp 21f\n"
"2:"
"\tmovl (%%esi), %%ecx\n"
- "\tshr $8, %%ecx\n"
+ /* sample >>= 8 */
+ "\tsarl $8, %%ecx\n"
+ "21:"
"\t" LOCK_PREFIX "addl %%ecx, (%%ebx)\n"
/*
@@ -305,53 +309,31 @@
"3:"
"\tmovl (%%ebx), %%ecx\n"
- "\tcmpl $0x7fffff,%%ecx\n"
- "\tjg 4f\n"
- "\tcmpl $-0x800000,%%ecx\n"
- "\tjl 5f\n"
- "\tmov %%ecx, %%eax\n"
- "\tshl $8, %%eax\n"
- "\tmovl %%eax, (%%edi)\n"
- "\tcmpl %%ecx, (%%ebx)\n"
- "\tjnz 3b\n"
-
/*
- * while (size-- > 0)
+ * if (sample > 0x7fff00)
*/
- "\tadd %4, %%edi\n"
- "\tadd %5, %%esi\n"
- "\tadd %6, %%ebx\n"
- "\tdecl %0\n"
- "\tjnz 1b\n"
- "\tjmp 6f\n"
-
+ "\tmovl $0x7fffff, %%eax\n"
+ "\tcmpl %%eax, %%ecx\n"
+ "\tjg 4f\n"
/*
- * sample > 0x7fff00
+ * if (sample < -0x800000)
*/
-
- "\t.p2align 4,,15\n"
-
+ "\tmovl $-0x800000, %%eax\n"
+ "\tcmpl %%eax, %%ecx\n"
+ "\tjl 4f\n"
+ "\tmovl %%ecx, %%eax\n"
"4:"
- "\tmovl $0x7fffffff, (%%edi)\n"
- "\tcmpl %%ecx,(%%ebx)\n"
- "\tjnz 3b\n"
- "\tadd %4, %%edi\n"
- "\tadd %5, %%esi\n"
- "\tadd %6, %%ebx\n"
- "\tdecl %0\n"
- "\tjnz 1b\n"
- "\tjmp 6f\n"
-
/*
- * sample < -0x800000
+ * sample <<= 8;
*/
-
- "\t.p2align 4,,15\n"
-
- "5:"
- "\tmovl $-0x80000000, (%%edi)\n"
+ "\tsall $8, %%eax\n"
+ "\tmovl %%eax, (%%edi)\n"
"\tcmpl %%ecx, (%%ebx)\n"
"\tjnz 3b\n"
+
+ /*
+ * while (size-- > 0)
+ */
"\tadd %4, %%edi\n"
"\tadd %5, %%esi\n"
"\tadd %6, %%ebx\n"
@@ -360,7 +342,6 @@
// "\tjmp 6f\n"
"6:"
-
: /* no output regs */
: "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m"
(src_step), "m" (sum_step)
: "esi", "edi", "edx", "ecx", "ebx", "eax"
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