diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2008-10-22 17:29:37 -0600 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2008-10-22 17:29:37 -0600 |
| commit | 0ac99457811eb766e9bdd3903857b5c0fdef7694 (patch) | |
| tree | 7350f062187160d506632e3ca05e8f1c675754ed /src | |
| parent | f8ab4feb75f4a592e23859813c093dcdbd4b8988 (diff) | |
gallium: PPC: clamp y to [-128,128] for LIT
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_ppc.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ppc.c b/src/gallium/auxiliary/tgsi/tgsi_ppc.c index 96beec0cc6..9ad7ecd7cf 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_ppc.c +++ b/src/gallium/auxiliary/tgsi/tgsi_ppc.c @@ -636,16 +636,17 @@ emit_lit(struct gen_context *gen, struct tgsi_full_instruction *inst) FETCH(gen, *inst, w_vec, 0, CHAN_W); /* w_vec = src[0].w */ - /* XXX clamp Y to [-128, 128] */ + /* clamp Y to [-128, 128] */ load_constant_vec(gen, p128_vec, 128.0f); load_constant_vec(gen, n128_vec, -128.0f); + ppc_vmaxfp(gen->f, y_vec, y_vec, n128_vec); /* y = max(y, -128) */ + ppc_vminfp(gen->f, y_vec, y_vec, p128_vec); /* y = min(y, 128) */ /* if temp.x > 0 - * pow(tmp.y, tmp.w) + * z = pow(tmp.y, tmp.w) * else - * 0.0 + * z = 0.0 */ - ppc_vec_pow(gen->f, pow_vec, y_vec, w_vec); /* pow = pow(y, w) */ ppc_vcmpgtfpx(gen->f, pos_vec, x_vec, zero_vec); /* pos = x > 0 */ ppc_vand(gen->f, z_vec, pow_vec, pos_vec); /* z = pow & pos */ |