diff options
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_format_soa.c | 73 |
1 files changed, 64 insertions, 9 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c index c9fbe0ad10..e5153a4bbb 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c @@ -108,18 +108,32 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder, switch(format_desc->channel[chan].type) { case UTIL_FORMAT_TYPE_VOID: - input = NULL; + input = lp_build_undef(type); break; case UTIL_FORMAT_TYPE_UNSIGNED: - if(type.floating) { - if(start) - input = LLVMBuildLShr(builder, input, lp_build_const_int_vec(type, start), ""); - if(stop < format_desc->block.bits) { - unsigned mask = ((unsigned long long)1 << width) - 1; - input = LLVMBuildAnd(builder, input, lp_build_const_int_vec(type, mask), ""); - } + /* + * Align the LSB + */ + + if (start) { + input = LLVMBuildLShr(builder, input, lp_build_const_int_vec(type, start), ""); + } + + /* + * Zero the MSBs + */ + + if (stop < format_desc->block.bits) { + unsigned mask = ((unsigned long long)1 << width) - 1; + input = LLVMBuildAnd(builder, input, lp_build_const_int_vec(type, mask), ""); + } + /* + * Type conversion + */ + + if (type.floating) { if(format_desc->channel[chan].normalized) input = lp_build_unsigned_norm_to_float(builder, width, type, input); else @@ -130,10 +144,51 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder, assert(0); input = lp_build_undef(type); } + + break; + + case UTIL_FORMAT_TYPE_SIGNED: + /* + * Align the sign bit first. + */ + + if (stop < type.width) { + unsigned bits = type.width - stop; + LLVMValueRef bits_val = lp_build_const_int_vec(type, bits); + input = LLVMBuildShl(builder, input, bits_val, ""); + } + + /* + * Align the LSB (with an arithmetic shift to preserve the sign) + */ + + if (format_desc->channel[chan].size < type.width) { + unsigned bits = type.width - format_desc->channel[chan].size; + LLVMValueRef bits_val = lp_build_const_int_vec(type, bits); + input = LLVMBuildAShr(builder, input, bits_val, ""); + } + + /* + * Type conversion + */ + + if (type.floating) { + input = LLVMBuildSIToFP(builder, input, lp_build_vec_type(type), ""); + if (format_desc->channel[chan].normalized) { + double scale = 1.0 / ((1 << (format_desc->channel[chan].size - 1)) - 1); + LLVMValueRef scale_val = lp_build_const_vec(type, scale); + input = LLVMBuildMul(builder, input, scale_val, ""); + } + } + else { + /* FIXME */ + assert(0); + input = lp_build_undef(type); + } + break; default: - /* fall through */ input = lp_build_undef(type); break; } |