mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
Moved asm i386 code to pcm_dmix_i386.h; UP optimization
This commit is contained in:
Jaroslav Kysela
parent
7e6031b151
commit
1c908a75c1
2 changed files with 268 additions and 219 deletions
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@ -571,241 +571,50 @@ static int check_interleave(snd_pcm_dmix_t *dmix)
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#define ADD_AND_SATURATE
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/*
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* for plain i386
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*/
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static void mix_areas1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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{
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/*
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* ESI - src
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* EDI - dst
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* EBX - sum
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* ECX - old sample
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* EAX - sample / temporary
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* EDX - size
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*/
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__asm__ __volatile__ (
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"\n"
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#define MIX_AREAS1 mix_areas1
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#define MIX_AREAS1_MMX mix_areas1_mmx
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#define LOCK_PREFIX ""
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS1_MMX
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#undef LOCK_PREFIX
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/*
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* initialization, load EDX, ESI, EDI, EBX registers
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*/
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"\tmovl %0, %%edx\n"
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"\tmovl %1, %%edi\n"
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"\tmovl %2, %%esi\n"
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"\tmovl %3, %%ebx\n"
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %%edx\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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"1:"
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/*
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* sample = *src;
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* if (cmpxchg(*dst, 0, 1) == 0)
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* sample -= *sum;
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* xadd(*sum, sample);
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*/
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"\tmovw $0, %%ax\n"
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"\tmovw $1, %%cx\n"
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"\tlock; cmpxchgw %%cx, (%%edi)\n"
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"\tmovswl (%%esi), %%ecx\n"
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"\tjnz 2f\n"
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"\tsubl (%%ebx), %%ecx\n"
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"2:"
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"\tlock; addl %%ecx, (%%ebx)\n"
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/*
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* do {
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* sample = old_sample = *sum;
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* saturate(v);
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* *dst = sample;
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* } while (v != *sum);
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*/
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"3:"
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"\tmovl (%%ebx), %%ecx\n"
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"\tcmpl $0x7fff,%%ecx\n"
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"\tjg 4f\n"
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"\tcmpl $-0x8000,%%ecx\n"
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"\tjl 5f\n"
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"\tmovw %%cx, (%%edi)\n"
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"\tcmpl %%ecx, (%%ebx)\n"
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"\tjnz 3b\n"
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/*
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* while (size-- > 0)
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*/
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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"\tjmp 6f\n"
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/*
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* sample > 0x7fff
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*/
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"\t.p2align 4,,15\n"
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"4:"
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"\tmovw $0x7fff, %%ax\n"
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"\tmovw %%ax, (%%edi)\n"
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"\tcmpl %%ecx,(%%ebx)\n"
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"\tjnz 3b\n"
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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"\tjmp 6f\n"
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/*
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* sample < -0x8000
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*/
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"\t.p2align 4,,15\n"
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"5:"
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"\tmovw $-0x8000, %%ax\n"
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"\tmovw %%ax, (%%edi)\n"
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"\tcmpl %%ecx, (%%ebx)\n"
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"\tjnz 3b\n"
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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// "\tjmp 6f\n"
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"6:"
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: /* no output regs */
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: "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
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: "esi", "edi", "edx", "ecx", "ebx", "eax"
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);
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}
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/*
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* MMX optimized
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*/
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static void mix_areas1_mmx(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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{
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/*
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* ESI - src
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* EDI - dst
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* EBX - sum
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* ECX - old sample
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* EAX - sample / temporary
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* EDX - size
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*/
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__asm__ __volatile__ (
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"\n"
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/*
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* initialization, load EDX, ESI, EDI, EBX registers
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*/
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"\tmovl %0, %%edx\n"
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"\tmovl %1, %%edi\n"
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"\tmovl %2, %%esi\n"
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"\tmovl %3, %%ebx\n"
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %%edx\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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"1:"
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/*
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* sample = *src;
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* if (cmpxchg(*dst, 0, 1) == 0)
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* sample -= *sum;
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* xadd(*sum, sample);
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*/
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"\tmovw $0, %%ax\n"
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"\tmovw $1, %%cx\n"
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"\tlock; cmpxchgw %%cx, (%%edi)\n"
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"\tmovswl (%%esi), %%ecx\n"
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"\tjnz 2f\n"
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"\tsubl (%%ebx), %%ecx\n"
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"2:"
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"\tlock; addl %%ecx, (%%ebx)\n"
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/*
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* do {
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* sample = old_sample = *sum;
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* saturate(v);
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* *dst = sample;
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* } while (v != *sum);
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*/
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"3:"
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"\tmovl (%%ebx), %%ecx\n"
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"\tmovd %%ecx, %%mm0\n"
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"\tpackssdw %%mm1, %%mm0\n"
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"\tmovd %%mm0, %%eax\n"
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"\tmovw %%ax, (%%edi)\n"
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"\tcmpl %%ecx, (%%ebx)\n"
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"\tjnz 3b\n"
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/*
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* while (size-- > 0)
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*/
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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"\tjmp 6f\n"
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"6:"
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"\temms\n"
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: /* no output regs */
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: "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
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: "esi", "edi", "edx", "ecx", "ebx", "eax"
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);
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}
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#define MIX_AREAS1 mix_areas1_smp
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#define MIX_AREAS1_MMX mix_areas1_smp_mmx
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#define LOCK_PREFIX "lock ; "
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS1_MMX
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#undef LOCK_PREFIX
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static void mix_select_callbacks(snd_pcm_dmix_t *dmix)
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{
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FILE *in;
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char line[255];
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int smp = 0, mmx = 0;
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/* safe settings for all i386 CPUs */
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dmix->mix_areas1 = mix_areas1;
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dmix->mix_areas1 = mix_areas1_smp;
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/* try to determine, if we have a MMX capable CPU */
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in = fopen("/proc/cpuinfo", "r");
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if (in == NULL)
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return;
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "flags", 5)) {
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fclose(in);
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if (strstr(line, " mmx")) {
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// printf("Selecting MMX mix_areas1\n");
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dmix->mix_areas1 = mix_areas1_mmx;
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}
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return;
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if (!strncmp(line, "processor", 9))
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smp++;
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else if (!strncmp(line, "flags", 5)) {
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if (strstr(line, " mmx"))
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mmx = 1;
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}
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}
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fclose(in);
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printf("MMX: %i, SMP: %i\n", mmx, smp);
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if (mmx) {
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dmix->mix_areas1 = smp > 1 ? mix_areas1_smp_mmx : mix_areas1_mmx;
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} else {
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dmix->mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
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}
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}
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#endif
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240
src/pcm/pcm_dmix_i386.h
Normal file
240
src/pcm/pcm_dmix_i386.h
Normal file
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@ -0,0 +1,240 @@
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/**
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* \file pcm/pcm_dmix_i386.h
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* \ingroup PCM_Plugins
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* \brief PCM Direct Stream Mixing (dmix) Plugin Interface - I386 assembler code
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* \author Jaroslav Kysela <perex@suse.cz>
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* \date 2002
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*/
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/*
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* PCM - Direct Stream Mixing
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* Copyright (c) 2000 by Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*
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* for plain i386
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*/
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static void MIX_AREAS1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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{
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/*
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* ESI - src
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* EDI - dst
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* EBX - sum
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* ECX - old sample
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* EAX - sample / temporary
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* EDX - size
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*/
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__asm__ __volatile__ (
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"\n"
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/*
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* initialization, load EDX, ESI, EDI, EBX registers
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*/
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"\tmovl %0, %%edx\n"
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"\tmovl %1, %%edi\n"
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"\tmovl %2, %%esi\n"
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"\tmovl %3, %%ebx\n"
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %%edx\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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"1:"
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/*
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* sample = *src;
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* if (cmpxchg(*dst, 0, 1) == 0)
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* sample -= *sum;
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* xadd(*sum, sample);
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*/
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"\tmovw $0, %%ax\n"
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"\tmovw $1, %%cx\n"
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"\t" LOCK_PREFIX "cmpxchgw %%cx, (%%edi)\n"
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"\tmovswl (%%esi), %%ecx\n"
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"\tjnz 2f\n"
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"\tsubl (%%ebx), %%ecx\n"
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"2:"
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"\t" LOCK_PREFIX "addl %%ecx, (%%ebx)\n"
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/*
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* do {
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* sample = old_sample = *sum;
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* saturate(v);
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* *dst = sample;
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* } while (v != *sum);
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*/
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"3:"
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"\tmovl (%%ebx), %%ecx\n"
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"\tcmpl $0x7fff,%%ecx\n"
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"\tjg 4f\n"
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"\tcmpl $-0x8000,%%ecx\n"
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"\tjl 5f\n"
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"\tmovw %%cx, (%%edi)\n"
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"\tcmpl %%ecx, (%%ebx)\n"
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"\tjnz 3b\n"
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/*
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* while (size-- > 0)
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*/
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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"\tjmp 6f\n"
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/*
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* sample > 0x7fff
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*/
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"\t.p2align 4,,15\n"
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"4:"
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"\tmovw $0x7fff, %%ax\n"
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"\tmovw %%ax, (%%edi)\n"
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"\tcmpl %%ecx,(%%ebx)\n"
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"\tjnz 3b\n"
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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"\tjmp 6f\n"
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/*
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* sample < -0x8000
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*/
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"\t.p2align 4,,15\n"
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"5:"
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"\tmovw $-0x8000, %%ax\n"
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"\tmovw %%ax, (%%edi)\n"
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"\tcmpl %%ecx, (%%ebx)\n"
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"\tjnz 3b\n"
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"\tadd %4, %%edi\n"
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"\tadd %5, %%esi\n"
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"\tadd %6, %%ebx\n"
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"\tdecl %%edx\n"
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"\tjnz 1b\n"
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// "\tjmp 6f\n"
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"6:"
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: /* no output regs */
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: "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
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: "esi", "edi", "edx", "ecx", "ebx", "eax"
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);
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}
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/*
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* MMX optimized
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*/
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static void MIX_AREAS1_MMX(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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{
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/*
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* ESI - src
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* EDI - dst
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* EBX - sum
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* ECX - old sample
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* EAX - sample / temporary
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* EDX - size
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*/
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__asm__ __volatile__ (
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"\n"
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/*
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* initialization, load EDX, ESI, EDI, EBX registers
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*/
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"\tmovl %0, %%edx\n"
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"\tmovl %1, %%edi\n"
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"\tmovl %2, %%esi\n"
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"\tmovl %3, %%ebx\n"
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %%edx\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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"1:"
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/*
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* sample = *src;
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* if (cmpxchg(*dst, 0, 1) == 0)
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* sample -= *sum;
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* xadd(*sum, sample);
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*/
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"\tmovw $0, %%ax\n"
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"\tmovw $1, %%cx\n"
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"\t" LOCK_PREFIX "cmpxchgw %%cx, (%%edi)\n"
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"\tmovswl (%%esi), %%ecx\n"
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"\tjnz 2f\n"
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"\tsubl (%%ebx), %%ecx\n"
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"2:"
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"\t" LOCK_PREFIX "addl %%ecx, (%%ebx)\n"
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/*
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* do {
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* sample = old_sample = *sum;
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* saturate(v);
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* *dst = sample;
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* } while (v != *sum);
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*/
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"3:"
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"\tmovl (%%ebx), %%ecx\n"
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||||
"\tmovd %%ecx, %%mm0\n"
|
||||
"\tpackssdw %%mm1, %%mm0\n"
|
||||
"\tmovd %%mm0, %%eax\n"
|
||||
"\tmovw %%ax, (%%edi)\n"
|
||||
"\tcmpl %%ecx, (%%ebx)\n"
|
||||
"\tjnz 3b\n"
|
||||
|
||||
/*
|
||||
* while (size-- > 0)
|
||||
*/
|
||||
"\tadd %4, %%edi\n"
|
||||
"\tadd %5, %%esi\n"
|
||||
"\tadd %6, %%ebx\n"
|
||||
"\tdecl %%edx\n"
|
||||
"\tjnz 1b\n"
|
||||
"\tjmp 6f\n"
|
||||
|
||||
"6:"
|
||||
|
||||
"\temms\n"
|
||||
|
||||
: /* 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"
|
||||
);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue