diff options
| author | nickols_k <nickols_k@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-06-20 07:54:19 +0000 |
|---|---|---|
| committer | nickols_k <nickols_k@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-06-20 07:54:19 +0000 |
| commit | 1202129042d7f1dbe58953ddd2f3d771ed4379ac (patch) | |
| tree | 4ac93dae0cbf799d663e40d2842b7717d081c75b /mp3lib | |
| parent | b267d6e357653f7fffba35ba666304b0af544452 (diff) | |
| download | mpv-1202129042d7f1dbe58953ddd2f3d771ed4379ac.tar.bz2 mpv-1202129042d7f1dbe58953ddd2f3d771ed4379ac.tar.xz | |
Better 3dnow! optimization
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@1174 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'mp3lib')
| -rw-r--r-- | mp3lib/dct64_k7.s | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/mp3lib/dct64_k7.s b/mp3lib/dct64_k7.s index 44e2cf74ed..6a82d618c4 100644 --- a/mp3lib/dct64_k7.s +++ b/mp3lib/dct64_k7.s @@ -9,6 +9,9 @@ /// (using memory reference as operand of instructions) /// - Phase 6 is rewritten with mixing of cpu and mmx opcodes /// - change function name for support 3DNowEx! automatic detect +/// - negation of 3dnow reg was replaced with PXOR 0x800000000, MMi instead +/// of PFMUL as it was suggested by athlon manual. (Two not separated PFMUL +/// can not be paired, but PXOR can be). /// /// note: because K7 processors are an aggresive out-of-order three-way /// superscalar ones instruction order is not significand for them. @@ -21,6 +24,11 @@ /// this program. Use it at your own risk. /// +.data + .align 8 +plus_minus_3dnow: .long 0x00000000, 0x80000000 + +.text .globl dct64_3dnowex .type dct64_3dnowex,@function @@ -412,13 +420,8 @@ dct64_3dnowex: movq %mm5, 120(%esi) // 5 - movl $-1,%eax - movd %eax,%mm1 + movq plus_minus_3dnow, %mm0 /* mm0 = 1.0 | -1.0 */ movl $1,%eax - movd %eax,%mm0 - / L | H - punpckldq %mm1,%mm0 - pi2fd %mm0,%mm0 /* mm0 = 1.0 | -1.0 */ movd %eax,%mm1 pi2fd %mm1,%mm1 movl pnts+16,%eax @@ -433,7 +436,7 @@ dct64_3dnowex: movq 8(%esi),%mm4 /* mm4 = tmp2[2] | tmp2[3]*/ pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 /* mm4 = tmp2[2]+tmp2[3]|tmp2[2]-tmp2[3]*/ - pfmul %mm0,%mm4 /* mm4 = tmp2[2]+tmp2[3]|tmp2[3]-tmp2[2]*/ + pxor %mm0,%mm4 /* mm4 = tmp2[2]+tmp2[3]|tmp2[3]-tmp2[2]*/ pfmul %mm1,%mm4 /* mm4 = tmp2[2]+tmp2[3]|(tmp2[3]-tmp2[2])*cos0*/ movq %mm4,%mm5 psrlq $32,%mm5 /* mm5 = (tmp2[3]-tmp2[2])*cos0 */ @@ -449,7 +452,7 @@ dct64_3dnowex: pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 @@ -470,7 +473,7 @@ dct64_3dnowex: movq 40(%esi),%mm4 pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 @@ -484,7 +487,7 @@ dct64_3dnowex: movq 56(%esi),%mm4 pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 @@ -504,7 +507,7 @@ dct64_3dnowex: movq 72(%esi),%mm4 pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 @@ -518,7 +521,7 @@ dct64_3dnowex: movq 88(%esi),%mm4 pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 @@ -538,7 +541,7 @@ dct64_3dnowex: movq 104(%esi),%mm4 pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 @@ -552,7 +555,7 @@ dct64_3dnowex: movq 120(%esi),%mm4 pfpnacc %mm4, %mm4 pswapd %mm4, %mm4 - pfmul %mm0,%mm4 + pxor %mm0,%mm4 pfmul %mm1,%mm4 movq %mm4,%mm5 psrlq $32,%mm5 |