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Convert ff_imdct_half_sse() to yasm.

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This is to avoid split asm sections that attempt to preserve some
registers between sections.

Originally committed as revision 24869 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2010-08-22 14:39:58 +00:00
parent 715e9be267
commit 78b5c97d3e
2 changed files with 195 additions and 108 deletions
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202
libavcodec/x86/fft_mmx.asm
View File

@ -29,6 +29,23 @@
%include "x86inc.asm"
%ifdef ARCH_X86_64
%define pointer resq
%else
%define pointer resd
%endif
struc FFTContext
.nbits: resd 1
.reverse: resd 1
.revtab: pointer 1
.tmpbuf: pointer 1
.mdctsize: resd 1
.mdctbits: resd 1
.tcos: pointer 1
.tsin: pointer 1
endstruc
SECTION_RODATA
%define M_SQRT1_2 0.70710678118654752440
@ -428,6 +445,16 @@ DECL_PASS pass_interleave_3dn, PASS_BIG 0
%define SECTION_REL
%endif
%macro FFT_DISPATCH 2; clobbers 5 GPRs, 8 XMMs
lea r2, [dispatch_tab%1]
mov r2, [r2 + (%2q-2)*gprsize]
%ifdef PIC
lea r3, [$$]
add r2, r3
%endif
call r2
%endmacro ; FFT_DISPATCH
%macro DECL_FFT 2-3 ; nbits, cpu, suffix
%xdefine list_of_fft fft4%2 SECTION_REL, fft8%2 SECTION_REL
%if %1==5
@ -464,13 +491,7 @@ section .text
; On x86_32, this function does the register saving and restoring for all of fft.
; The others pass args in registers and don't spill anything.
cglobal fft_dispatch%3%2, 2,5,8, z, nbits
lea r2, [dispatch_tab%3%2]
mov r2, [r2 + (nbitsq-2)*gprsize]
%ifdef PIC
lea r3, [$$]
add r2, r3
%endif
call r2
FFT_DISPATCH %3%2, nbits
RET
%endmacro ; DECL_FFT
@ -481,3 +502,170 @@ DECL_FFT 4, _3dn, _interleave
DECL_FFT 4, _3dn2
DECL_FFT 4, _3dn2, _interleave
INIT_XMM
%undef mulps
%undef addps
%undef subps
%undef unpcklps
%undef unpckhps
%macro PREROTATER 5 ;-2*k, 2*k, input+n4, tcos+n8, tsin+n8
movaps xmm0, [%3+%2*4]
movaps xmm1, [%3+%1*4-0x10]
movaps xmm2, xmm0
shufps xmm0, xmm1, 0x88
shufps xmm1, xmm2, 0x77
movlps xmm4, [%4+%2*2]
movlps xmm5, [%5+%2*2+0x0]
movhps xmm4, [%4+%1*2-0x8]
movhps xmm5, [%5+%1*2-0x8]
movaps xmm2, xmm0
movaps xmm3, xmm1
mulps xmm0, xmm5
mulps xmm1, xmm4
mulps xmm2, xmm4
mulps xmm3, xmm5
subps xmm1, xmm0
addps xmm2, xmm3
movaps xmm0, xmm1
unpcklps xmm1, xmm2
unpckhps xmm0, xmm2
%endmacro
%macro PREROTATEW 3 ;addr1, addr2, xmm
movlps %1, %3
movhps %2, %3
%endmacro
%macro CMUL 6 ;j, xmm0, xmm1, 3, 4, 5
movaps xmm6, [%4+%1*2]
movaps %2, [%4+%1*2+0x10]
movaps %3, xmm6
movaps xmm7, %2
mulps xmm6, [%5+%1*1]
mulps %2, [%6+%1*1]
mulps %3, [%6+%1*1]
mulps xmm7, [%5+%1*1]
subps %2, xmm6
addps %3, xmm7
%endmacro
%macro POSROTATESHUF 5 ;j, k, z+n8, tcos+n8, tsin+n8
.post:
CMUL %1, xmm0, xmm1, %3, %4, %5
CMUL %2, xmm4, xmm5, %3, %4, %5
shufps xmm1, xmm1, 0x1b
shufps xmm5, xmm5, 0x1b
movaps xmm6, xmm4
unpckhps xmm4, xmm1
unpcklps xmm6, xmm1
movaps xmm2, xmm0
unpcklps xmm0, xmm5
unpckhps xmm2, xmm5
movaps [%3+%2*2], xmm6
movaps [%3+%2*2+0x10], xmm4
movaps [%3+%1*2], xmm0
movaps [%3+%1*2+0x10], xmm2
sub %2, 0x10
add %1, 0x10
jl .post
%endmacro
cglobal imdct_half_sse, 3,7,8; FFTContext *s, FFTSample *output, const FFTSample *input
%ifdef ARCH_X86_64
%define rrevtab r10
%define rtcos r11
%define rtsin r12
push r10
push r11
push r12
push r13
push r14
%else
%define rrevtab r6
%define rtsin r6
%define rtcos r5
%endif
mov r3d, [r0+FFTContext.mdctsize]
add r2, r3
shr r3, 1
mov rtcos, [r0+FFTContext.tcos]
mov rtsin, [r0+FFTContext.tsin]
add rtcos, r3
add rtsin, r3
%ifndef ARCH_X86_64
push rtcos
push rtsin
%endif
shr r3, 1
mov rrevtab, [r0+FFTContext.revtab]
add rrevtab, r3
%ifndef ARCH_X86_64
push rrevtab
%endif
sub r3, 4
%ifdef ARCH_X86_64
xor r4, r4
sub r4, r3
%endif
.pre:
%ifndef ARCH_X86_64
;unspill
xor r4, r4
sub r4, r3
mov rtsin, [esp+4]
mov rtcos, [esp+8]
%endif
PREROTATER r4, r3, r2, rtcos, rtsin
%ifdef ARCH_X86_64
movzx r5, word [rrevtab+r4*1-4]
movzx r6, word [rrevtab+r4*1-2]
movzx r13, word [rrevtab+r3*1]
movzx r14, word [rrevtab+r3*1+2]
PREROTATEW [r1+r5 *8], [r1+r6 *8], xmm0
PREROTATEW [r1+r13*8], [r1+r14*8], xmm1
add r4, 4
%else
mov r6, [esp]
movzx r5, word [r6+r4*1-4]
movzx r4, word [r6+r4*1-2]
PREROTATEW [r1+r5*8], [r1+r4*8], xmm0
movzx r5, word [r6+r3*1]
movzx r4, word [r6+r3*1+2]
PREROTATEW [r1+r5*8], [r1+r4*8], xmm1
%endif
sub r3, 4
jns .pre
mov r5, r0
mov r6, r1
mov r0, r1
mov r1d, [r5+FFTContext.nbits]
FFT_DISPATCH _sse, r1
mov r0d, [r5+FFTContext.mdctsize]
add r6, r0
shr r0, 1
%ifndef ARCH_X86_64
%define rtcos r2
%define rtsin r3
mov rtcos, [esp+8]
mov rtsin, [esp+4]
%endif
neg r0
mov r1, -16
sub r1, r0
POSROTATESHUF r0, r1, r6, rtcos, rtsin
%ifdef ARCH_X86_64
pop r14
pop r13
pop r12
pop r11
pop r10
%else
add esp, 12
%endif
RET

101
libavcodec/x86/fft_sse.c
View File

@ -71,107 +71,6 @@ void ff_fft_permute_sse(FFTContext *s, FFTComplex *z)
memcpy(z, s->tmp_buf, n*sizeof(FFTComplex));
}
void ff_imdct_half_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
{
av_unused x86_reg i, j, k, l;
long n = 1 << s->mdct_bits;
long n2 = n >> 1;
long n4 = n >> 2;
long n8 = n >> 3;
const uint16_t *revtab = s->revtab + n8;
const FFTSample *tcos = s->tcos;
const FFTSample *tsin = s->tsin;
FFTComplex *z = (FFTComplex *)output;
/* pre rotation */
for(k=n8-2; k>=0; k-=2) {
__asm__ volatile(
"movaps (%2,%1,2), %%xmm0 \n" // { z[k].re, z[k].im, z[k+1].re, z[k+1].im }
"movaps -16(%2,%0,2), %%xmm1 \n" // { z[-k-2].re, z[-k-2].im, z[-k-1].re, z[-k-1].im }
"movaps %%xmm0, %%xmm2 \n"
"shufps $0x88, %%xmm1, %%xmm0 \n" // { z[k].re, z[k+1].re, z[-k-2].re, z[-k-1].re }
"shufps $0x77, %%xmm2, %%xmm1 \n" // { z[-k-1].im, z[-k-2].im, z[k+1].im, z[k].im }
"movlps (%3,%1), %%xmm4 \n"
"movlps (%4,%1), %%xmm5 \n"
"movhps -8(%3,%0), %%xmm4 \n" // { cos[k], cos[k+1], cos[-k-2], cos[-k-1] }
"movhps -8(%4,%0), %%xmm5 \n" // { sin[k], sin[k+1], sin[-k-2], sin[-k-1] }
"movaps %%xmm0, %%xmm2 \n"
"movaps %%xmm1, %%xmm3 \n"
"mulps %%xmm5, %%xmm0 \n" // re*sin
"mulps %%xmm4, %%xmm1 \n" // im*cos
"mulps %%xmm4, %%xmm2 \n" // re*cos
"mulps %%xmm5, %%xmm3 \n" // im*sin
"subps %%xmm0, %%xmm1 \n" // -> re
"addps %%xmm3, %%xmm2 \n" // -> im
"movaps %%xmm1, %%xmm0 \n"
"unpcklps %%xmm2, %%xmm1 \n" // { z[k], z[k+1] }
"unpckhps %%xmm2, %%xmm0 \n" // { z[-k-2], z[-k-1] }
::"r"(-4*k), "r"(4*k),
"r"(input+n4), "r"(tcos+n8), "r"(tsin+n8)
);
#if ARCH_X86_64
// if we have enough regs, don't let gcc make the luts latency-bound
// but if not, latency is faster than spilling
__asm__("movlps %%xmm0, %0 \n"
"movhps %%xmm0, %1 \n"
"movlps %%xmm1, %2 \n"
"movhps %%xmm1, %3 \n"
:"=m"(z[revtab[-k-2]]),
"=m"(z[revtab[-k-1]]),
"=m"(z[revtab[ k ]]),
"=m"(z[revtab[ k+1]])
);
#else
__asm__("movlps %%xmm0, %0" :"=m"(z[revtab[-k-2]]));
__asm__("movhps %%xmm0, %0" :"=m"(z[revtab[-k-1]]));
__asm__("movlps %%xmm1, %0" :"=m"(z[revtab[ k ]]));
__asm__("movhps %%xmm1, %0" :"=m"(z[revtab[ k+1]]));
#endif
}
ff_fft_dispatch_sse(z, s->nbits);
/* post rotation + reinterleave + reorder */
#define CMUL(j,xmm0,xmm1)\
"movaps (%2,"#j",2), %%xmm6 \n"\
"movaps 16(%2,"#j",2), "#xmm0"\n"\
"movaps %%xmm6, "#xmm1"\n"\
"movaps "#xmm0",%%xmm7 \n"\
"mulps (%3,"#j"), %%xmm6 \n"\
"mulps (%4,"#j"), "#xmm0"\n"\
"mulps (%4,"#j"), "#xmm1"\n"\
"mulps (%3,"#j"), %%xmm7 \n"\
"subps %%xmm6, "#xmm0"\n"\
"addps %%xmm7, "#xmm1"\n"
j = -n2;
k = n2-16;
__asm__ volatile(
"1: \n"
CMUL(%0, %%xmm0, %%xmm1)
CMUL(%1, %%xmm4, %%xmm5)
"shufps $0x1b, %%xmm1, %%xmm1 \n"
"shufps $0x1b, %%xmm5, %%xmm5 \n"
"movaps %%xmm4, %%xmm6 \n"
"unpckhps %%xmm1, %%xmm4 \n"
"unpcklps %%xmm1, %%xmm6 \n"
"movaps %%xmm0, %%xmm2 \n"
"unpcklps %%xmm5, %%xmm0 \n"
"unpckhps %%xmm5, %%xmm2 \n"
"movaps %%xmm6, (%2,%1,2) \n"
"movaps %%xmm4, 16(%2,%1,2) \n"
"movaps %%xmm0, (%2,%0,2) \n"
"movaps %%xmm2, 16(%2,%0,2) \n"
"sub $16, %1 \n"
"add $16, %0 \n"
"jl 1b \n"
:"+&r"(j), "+&r"(k)
:"r"(z+n8), "r"(tcos+n8), "r"(tsin+n8)
:"memory"
);
}
void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
{
x86_reg j, k;