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gallivm: Fix 4 x unorm8 -> 4 x float conversion.

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Also fix the test.
This commit is contained in:
José Fonseca 2010-07-01 18:27:39 +01:00
parent 8556b77c56
commit 37f4c2f906
3 changed files with 31 additions and 8 deletions
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19
src/gallium/auxiliary/gallivm/lp_bld_conv.c
View file

@ -330,15 +330,24 @@ lp_build_conv(LLVMBuilderRef builder,
/*
* Truncate or expand bit width
*
* No data conversion should happen here, although the sign bits are
* crucial to avoid bad clamping.
*/
assert(!tmp_type.floating || tmp_type.width == dst_type.width);
{
struct lp_type new_type;
lp_build_resize(builder, tmp_type, dst_type, tmp, num_srcs, tmp, num_dsts);
new_type = tmp_type;
new_type.sign = dst_type.sign;
new_type.width = dst_type.width;
new_type.length = dst_type.length;
tmp_type.width = dst_type.width;
tmp_type.length = dst_type.length;
num_tmps = num_dsts;
lp_build_resize(builder, tmp_type, new_type, tmp, num_srcs, tmp, num_dsts);
tmp_type = new_type;
num_tmps = num_dsts;
}
/*
* Scale to the widest range

18
src/gallium/auxiliary/gallivm/lp_bld_pack.c
View file

@ -430,7 +430,10 @@ lp_build_pack(LLVMBuilderRef builder,
/**
* Truncate or expand the bitwidth
* Truncate or expand the bitwidth.
*
* NOTE: Getting the right sign flags is crucial here, as we employ some
* intrinsics that do saturation.
*/
void
lp_build_resize(LLVMBuilderRef builder,
@ -442,7 +445,18 @@ lp_build_resize(LLVMBuilderRef builder,
LLVMValueRef tmp[LP_MAX_VECTOR_LENGTH];
unsigned i;
assert(!src_type.floating || src_type.width == dst_type.width);
/*
* We don't support float <-> int conversion here. That must be done
* before/after calling this function.
*/
assert(src_type.floating == dst_type.floating);
/*
* We don't support double <-> float conversion yet, although it could be
* added with little effort.
*/
assert((!src_type.floating && !dst_type.floating) ||
src_type.width == dst_type.width);
/* We must not loose or gain channels. Only precision */
assert(src_type.length * num_srcs == dst_type.length * num_dsts);

2
src/gallium/drivers/llvmpipe/lp_test_conv.c
View file

@ -167,7 +167,7 @@ test_one(unsigned verbose,
unsigned i, j;
void *code;
if (src_type.width * src_type.length != dst_type.width * dst_type.length ||
if (src_type.width * src_type.length != dst_type.width * dst_type.length &&
src_type.length != dst_type.length) {
return TRUE;
}