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Diffstat (limited to 'src/gallium/auxiliary/draw')
-rw-r--r--src/gallium/auxiliary/draw/draw_vs_aos.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vs_aos.c b/src/gallium/auxiliary/draw/draw_vs_aos.c
index 0c693a4a65..f4c6705bae 100644
--- a/src/gallium/auxiliary/draw/draw_vs_aos.c
+++ b/src/gallium/auxiliary/draw/draw_vs_aos.c
@@ -1559,7 +1559,6 @@ static boolean emit_RCP( struct aos_compilation *cp, const struct tgsi_full_inst
*/
static boolean emit_RSQ( struct aos_compilation *cp, const struct tgsi_full_instruction *op )
{
-
if (0) {
struct x86_reg arg0 = fetch_src(cp, &op->FullSrcRegisters[0]);
struct x86_reg r = aos_get_xmm_reg(cp);
@@ -1568,21 +1567,30 @@ static boolean emit_RSQ( struct aos_compilation *cp, const struct tgsi_full_inst
return TRUE;
}
else {
- struct x86_reg arg0 = fetch_src(cp, &op->FullSrcRegisters[0]);
- struct x86_reg r = aos_get_xmm_reg(cp);
+ struct x86_reg arg0 = fetch_src(cp, &op->FullSrcRegisters[0]);
+ struct x86_reg r = aos_get_xmm_reg(cp);
struct x86_reg neg_half = get_reg_ptr( cp, AOS_FILE_INTERNAL, IMM_RSQ );
struct x86_reg one_point_five = x86_make_disp( neg_half, 4 );
struct x86_reg src = get_xmm_writable( cp, arg0 );
-
- sse_rsqrtss( cp->func, r, src ); /* rsqrtss(a) */
- sse_mulss( cp->func, src, neg_half ); /* -.5 * a */
- sse_mulss( cp->func, src, r ); /* -.5 * a * r */
- sse_mulss( cp->func, src, r ); /* -.5 * a * r * r */
- sse_addss( cp->func, src, one_point_five ); /* 1.5 - .5 * a * r * r */
- sse_mulss( cp->func, r, src ); /* r * (1.5 - .5 * a * r * r) */
+ struct x86_reg neg = aos_get_internal(cp, IMM_NEGS);
+ struct x86_reg tmp = aos_get_xmm_reg(cp);
+
+ sse_movaps(cp->func, tmp, src);
+ sse_mulps(cp->func, tmp, neg);
+ sse_maxps(cp->func, tmp, src);
+
+ sse_rsqrtss( cp->func, r, tmp ); /* rsqrtss(a) */
+ sse_mulss( cp->func, tmp, neg_half ); /* -.5 * a */
+ sse_mulss( cp->func, tmp, r ); /* -.5 * a * r */
+ sse_mulss( cp->func, tmp, r ); /* -.5 * a * r * r */
+ sse_addss( cp->func, tmp, one_point_five ); /* 1.5 - .5 * a * r * r */
+ sse_mulss( cp->func, r, tmp ); /* r * (1.5 - .5 * a * r * r) */
store_scalar_dest(cp, &op->FullDstRegisters[0], r);
+
+ aos_release_xmm_reg(cp, tmp.idx);
+
return TRUE;
}
}