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cell: use some SPU intrinsics to get slightly better code in eval_inputs() 

Suggested by Jonathan Adamczewski.  There may be more places to do this...
This commit is contained in:
Brian Paul 2009-02-16 08:25:33 -07:00
parent ffbe28d25d
commit c51938afe1
1 changed files with 7 additions and 4 deletions
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11
src/gallium/drivers/cell/spu/spu_tri.c
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@ -219,10 +219,13 @@ eval_inputs(float x, float y, vector float *fragZ, vector float fragInputs[])
/* linear term */
vector float dadx = setup.coef[attr].dadx;
vector float dady = setup.coef[attr].dady;
r0 += fragX * splatx(dadx) + fragY * splatx(dady);
r1 += fragX * splaty(dadx) + fragY * splaty(dady);
r2 += fragX * splatz(dadx) + fragY * splatz(dady);
r3 += fragX * splatw(dadx) + fragY * splatw(dady);
/* Use SPU intrinsics here to get slightly better code.
* originally: r0 += fragX * splatx(dadx) + fragY * splatx(dady);
*/
r0 = spu_madd(fragX, splatx(dadx), spu_madd(fragY, splatx(dady), r0));
r1 = spu_madd(fragX, splaty(dadx), spu_madd(fragY, splaty(dady), r1));
r2 = spu_madd(fragX, splatz(dadx), spu_madd(fragY, splatz(dady), r2));
r3 = spu_madd(fragX, splatw(dadx), spu_madd(fragY, splatw(dady), r3));
if (interp == INTERP_PERSPECTIVE) {
/* perspective term */
r0 *= wInv;