From: Axel Davy Date: Wed, 3 Dec 2014 14:31:44 +0000 (+0100) Subject: st/nine: Handle NRM with input of null norm X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f5e8e3fb806ef8516a7bd5fabdce4cc24e4c9636;p=mesa.git st/nine: Handle NRM with input of null norm When the input's xyz are 0.0, the output should be 0.0. This is due to the fact that Inf * 0 = 0 for dx9. To handle this case, cap the result of RSQ to FLT_MAX. We have FLT_MAX * 0 = 0. Reviewed-by: David Heidelberg Signed-off-by: Axel Davy Cc: "10.4" --- diff --git a/src/gallium/state_trackers/nine/nine_shader.c b/src/gallium/state_trackers/nine/nine_shader.c index 1f113789d1d..fa1151c124a 100644 --- a/src/gallium/state_trackers/nine/nine_shader.c +++ b/src/gallium/state_trackers/nine/nine_shader.c @@ -1963,10 +1963,12 @@ DECL_SPECIAL(NRM) struct ureg_program *ureg = tx->ureg; struct ureg_dst tmp = tx_scratch_scalar(tx); struct ureg_src nrm = tx_src_scalar(tmp); + struct ureg_dst dst = tx_dst_param(tx, &tx->insn.dst[0]); struct ureg_src src = tx_src_param(tx, &tx->insn.src[0]); ureg_DP3(ureg, tmp, src, src); ureg_RSQ(ureg, tmp, nrm); - ureg_MUL(ureg, tx_dst_param(tx, &tx->insn.dst[0]), src, nrm); + ureg_MIN(ureg, tmp, ureg_imm1f(ureg, FLT_MAX), nrm); + ureg_MUL(ureg, dst, src, nrm); return D3D_OK; }