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draw: slight tweak for XPD opcode

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This commit is contained in:
Keith Whitwell 2008-05-25 15:47:04 +01:00
parent 3afb7198e0
commit 9c7568965c
1 changed files with 7 additions and 14 deletions
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21
src/gallium/auxiliary/draw/draw_vs_aos.c
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@ -1626,31 +1626,24 @@ static boolean emit_XPD( struct aos_compilation *cp, const struct tgsi_full_inst
{
struct x86_reg arg0 = fetch_src(cp, &op->FullSrcRegisters[0]);
struct x86_reg arg1 = fetch_src(cp, &op->FullSrcRegisters[1]);
struct x86_reg dst = aos_get_xmm_reg(cp);
struct x86_reg tmp0 = aos_get_xmm_reg(cp);
struct x86_reg tmp1 = aos_get_xmm_reg(cp);
/* Could avoid tmp0, tmp1 if we overwrote arg0, arg1. Need a way
* to invalidate registers. This will come with better analysis
* (liveness analysis) of the incoming program.
*/
emit_pshufd(cp, dst, arg0, SHUF(Y, Z, X, W));
emit_pshufd(cp, tmp1, arg1, SHUF(Z, X, Y, W));
sse_mulps(cp->func, dst, tmp1);
emit_pshufd(cp, tmp0, arg0, SHUF(Z, X, Y, W));
emit_pshufd(cp, tmp1, arg1, SHUF(Y, Z, X, W));
sse_mulps(cp->func, tmp0, tmp1);
sse_subps(cp->func, dst, tmp0);
sse_mulps(cp->func, tmp1, arg0);
emit_pshufd(cp, tmp0, arg0, SHUF(Y, Z, X, W));
sse_mulps(cp->func, tmp0, arg1);
sse_subps(cp->func, tmp1, tmp0);
sse_shufps(cp->func, tmp1, tmp1, SHUF(Y, Z, X, W));
/* dst[2] = arg0[0] * arg1[1] - arg0[1] * arg1[0]; */
/* dst[0] = arg0[1] * arg1[2] - arg0[2] * arg1[1]; */
/* dst[1] = arg0[2] * arg1[0] - arg0[0] * arg1[2]; */
/* dst[2] = arg0[0] * arg1[1] - arg0[1] * arg1[0]; */
/* dst[3] is undef */
aos_release_xmm_reg(cp, tmp0.idx);
aos_release_xmm_reg(cp, tmp1.idx);
store_dest(cp, &op->FullDstRegisters[0], dst);
store_dest(cp, &op->FullDstRegisters[0], tmp1);
return TRUE;
}