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radeonsi: NaN should pass kill_if

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Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=105333
Fixes: https://github.com/iXit/Mesa-3D/issues/314

For this application, NaN is passed to KILL_IF and is expected to
pass.

v2: Explain in the code why UGE is used.

Signed-off-by: Axel Davy <davyaxel0@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

CC: <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Axel Davy 2018-09-23 16:18:55 +02:00
parent 46814e771a
commit 0d495bec25
1 changed files with 2 additions and 1 deletions
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3
src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c
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@ -60,7 +60,8 @@ static void kil_emit(const struct lp_build_tgsi_action *action,
for (i = 0; i < TGSI_NUM_CHANNELS; i++) {
LLVMValueRef value = lp_build_emit_fetch(bld_base, inst, 0, i);
conds[i] = LLVMBuildFCmp(builder, LLVMRealOGE, value,
/* UGE because NaN shouldn't get killed */
conds[i] = LLVMBuildFCmp(builder, LLVMRealUGE, value,
ctx->ac.f32_0, "");
}