diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c | 29 |
1 files changed, 8 insertions, 21 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c b/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c index 12f8de40564..405469dd284 100644 --- a/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c +++ b/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c @@ -656,27 +656,14 @@ static void emit_pk2h(const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { - LLVMBuilderRef builder = bld_base->base.gallivm->builder; - LLVMContextRef context = bld_base->base.gallivm->context; - struct lp_build_context *uint_bld = &bld_base->uint_bld; - LLVMTypeRef fp16, i16; - LLVMValueRef const16, comp[2]; - unsigned i; - - fp16 = LLVMHalfTypeInContext(context); - i16 = LLVMInt16TypeInContext(context); - const16 = lp_build_const_int32(uint_bld->gallivm, 16); - - for (i = 0; i < 2; i++) { - comp[i] = LLVMBuildFPTrunc(builder, emit_data->args[i], fp16, ""); - comp[i] = LLVMBuildBitCast(builder, comp[i], i16, ""); - comp[i] = LLVMBuildZExt(builder, comp[i], uint_bld->elem_type, ""); - } - - comp[1] = LLVMBuildShl(builder, comp[1], const16, ""); - comp[0] = LLVMBuildOr(builder, comp[0], comp[1], ""); - - emit_data->output[emit_data->chan] = comp[0]; + /* From the GLSL 4.50 spec: + * "The rounding mode cannot be set and is undefined." + * + * v_cvt_pkrtz_f16 rounds to zero, but it's fastest. + */ + emit_data->output[emit_data->chan] = + ac_build_cvt_pkrtz_f16(&si_shader_context(bld_base)->ac, + emit_data->args); } static void up2h_fetch_args(struct lp_build_tgsi_context *bld_base, |