**************************************************************************/
+#include "pipe/p_defines.h"
+
#include "util/u_format.h"
+#include "util/u_memory.h"
+#include "util/u_string.h"
#include "lp_bld_type.h"
#include "lp_bld_const.h"
#include "lp_bld_conv.h"
+#include "lp_bld_swizzle.h"
+#include "lp_bld_gather.h"
+#include "lp_bld_debug.h"
#include "lp_bld_format.h"
-static LLVMValueRef
-lp_build_format_swizzle_chan_soa(struct lp_type type,
- const LLVMValueRef *unswizzled,
- enum util_format_swizzle swizzle)
-{
- switch (swizzle) {
- case UTIL_FORMAT_SWIZZLE_X:
- case UTIL_FORMAT_SWIZZLE_Y:
- case UTIL_FORMAT_SWIZZLE_Z:
- case UTIL_FORMAT_SWIZZLE_W:
- return unswizzled[swizzle];
- case UTIL_FORMAT_SWIZZLE_0:
- return lp_build_zero(type);
- case UTIL_FORMAT_SWIZZLE_1:
- return lp_build_one(type);
- case UTIL_FORMAT_SWIZZLE_NONE:
- return lp_build_undef(type);
- default:
- assert(0);
- return lp_build_undef(type);
- }
-}
-
-
void
lp_build_format_swizzle_soa(const struct util_format_description *format_desc,
- struct lp_type type,
+ struct lp_build_context *bld,
const LLVMValueRef *unswizzled,
- LLVMValueRef *swizzled)
+ LLVMValueRef swizzled_out[4])
{
- if(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) {
+ assert(UTIL_FORMAT_SWIZZLE_0 == PIPE_SWIZZLE_ZERO);
+ assert(UTIL_FORMAT_SWIZZLE_1 == PIPE_SWIZZLE_ONE);
+
+ if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) {
+ /*
+ * Return zzz1 for depth-stencil formats.
+ *
+ * XXX: Allow to control the depth swizzle with an additional parameter,
+ * as the caller may wish another depth swizzle, or retain the stencil
+ * value.
+ */
enum util_format_swizzle swizzle = format_desc->swizzle[0];
- LLVMValueRef depth = lp_build_format_swizzle_chan_soa(type, unswizzled, swizzle);
- swizzled[2] = swizzled[1] = swizzled[0] = depth;
- swizzled[3] = lp_build_one(type);
+ LLVMValueRef depth = lp_build_swizzle_soa_channel(bld, unswizzled, swizzle);
+ swizzled_out[2] = swizzled_out[1] = swizzled_out[0] = depth;
+ swizzled_out[3] = bld->one;
}
else {
unsigned chan;
for (chan = 0; chan < 4; ++chan) {
enum util_format_swizzle swizzle = format_desc->swizzle[chan];
- swizzled[chan] = lp_build_format_swizzle_chan_soa(type, unswizzled, swizzle);
+ swizzled_out[chan] = lp_build_swizzle_soa_channel(bld, unswizzled, swizzle);
}
}
}
+/**
+ * Unpack several pixels in SoA.
+ *
+ * It takes a vector of packed pixels:
+ *
+ * packed = {P0, P1, P2, P3, ..., Pn}
+ *
+ * And will produce four vectors:
+ *
+ * red = {R0, R1, R2, R3, ..., Rn}
+ * green = {G0, G1, G2, G3, ..., Gn}
+ * blue = {B0, B1, B2, B3, ..., Bn}
+ * alpha = {A0, A1, A2, A3, ..., An}
+ *
+ * It requires that a packed pixel fits into an element of the output
+ * channels. The common case is when converting pixel with a depth of 32 bit or
+ * less into floats.
+ *
+ * \param format_desc the format of the 'packed' incoming pixel vector
+ * \param type the desired type for rgba_out (type.length = n, above)
+ * \param packed the incoming vector of packed pixels
+ * \param rgba_out returns the SoA R,G,B,A vectors
+ */
void
-lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
+lp_build_unpack_rgba_soa(struct gallivm_state *gallivm,
const struct util_format_description *format_desc,
struct lp_type type,
LLVMValueRef packed,
- LLVMValueRef *rgba)
+ LLVMValueRef rgba_out[4])
{
+ LLVMBuilderRef builder = gallivm->builder;
+ struct lp_build_context bld;
LLVMValueRef inputs[4];
unsigned start;
unsigned chan;
- /* FIXME: Support more formats */
assert(format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN);
assert(format_desc->block.width == 1);
assert(format_desc->block.height == 1);
- assert(format_desc->block.bits <= 32);
+ assert(format_desc->block.bits <= type.width);
+ /* FIXME: Support more output types */
+ assert(type.floating);
+ assert(type.width == 32);
+
+ lp_build_context_init(&bld, gallivm, type);
/* Decode the input vector components */
start = 0;
- for (chan = 0; chan < 4; ++chan) {
- unsigned width = format_desc->channel[chan].size;
- unsigned stop = start + width;
+ for (chan = 0; chan < format_desc->nr_channels; ++chan) {
+ const unsigned width = format_desc->channel[chan].size;
+ const unsigned stop = start + width;
LLVMValueRef input;
input = packed;
switch(format_desc->channel[chan].type) {
case UTIL_FORMAT_TYPE_VOID:
- input = NULL;
+ input = lp_build_undef(gallivm, type);
break;
case UTIL_FORMAT_TYPE_UNSIGNED:
- if(type.floating) {
- if(start)
- input = LLVMBuildLShr(builder, input, lp_build_int_const_scalar(type, start), "");
- if(stop < format_desc->block.bits) {
- unsigned mask = ((unsigned long long)1 << width) - 1;
- input = LLVMBuildAnd(builder, input, lp_build_int_const_scalar(type, mask), "");
- }
+ /*
+ * Align the LSB
+ */
+
+ if (start) {
+ input = LLVMBuildLShr(builder, input, lp_build_const_int_vec(gallivm, 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(gallivm, type, mask), "");
+ }
+ /*
+ * Type conversion
+ */
+
+ if (type.floating) {
if(format_desc->channel[chan].normalized)
- input = lp_build_unsigned_norm_to_float(builder, width, type, input);
+ input = lp_build_unsigned_norm_to_float(gallivm, width, type, input);
else
- input = LLVMBuildFPToSI(builder, input, lp_build_vec_type(type), "");
+ input = LLVMBuildSIToFP(builder, input,
+ lp_build_vec_type(gallivm, type), "");
+ }
+ else {
+ /* FIXME */
+ assert(0);
+ input = lp_build_undef(gallivm, 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(gallivm, 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(gallivm, type, bits);
+ input = LLVMBuildAShr(builder, input, bits_val, "");
+ }
+
+ /*
+ * Type conversion
+ */
+
+ if (type.floating) {
+ input = LLVMBuildSIToFP(builder, input, lp_build_vec_type(gallivm, 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(gallivm, type, scale);
+ input = LLVMBuildFMul(builder, input, scale_val, "");
+ }
}
else {
/* FIXME */
assert(0);
- input = lp_build_undef(type);
+ input = lp_build_undef(gallivm, type);
+ }
+
+ break;
+
+ case UTIL_FORMAT_TYPE_FLOAT:
+ if (type.floating) {
+ assert(start == 0);
+ assert(stop == 32);
+ assert(type.width == 32);
+ input = LLVMBuildBitCast(builder, input, lp_build_vec_type(gallivm, type), "");
+ }
+ else {
+ /* FIXME */
+ assert(0);
+ input = lp_build_undef(gallivm, type);
+ }
+ break;
+
+ case UTIL_FORMAT_TYPE_FIXED:
+ if (type.floating) {
+ double scale = 1.0 / ((1 << (format_desc->channel[chan].size/2)) - 1);
+ LLVMValueRef scale_val = lp_build_const_vec(gallivm, type, scale);
+ input = LLVMBuildSIToFP(builder, input, lp_build_vec_type(gallivm, type), "");
+ input = LLVMBuildFMul(builder, input, scale_val, "");
+ }
+ else {
+ /* FIXME */
+ assert(0);
+ input = lp_build_undef(gallivm, type);
}
break;
default:
- /* fall through */
- input = lp_build_undef(type);
+ assert(0);
+ input = lp_build_undef(gallivm, type);
break;
}
start = stop;
}
- lp_build_format_swizzle_soa(format_desc, type, inputs, rgba);
+ lp_build_format_swizzle_soa(format_desc, &bld, inputs, rgba_out);
+}
+
+
+void
+lp_build_rgba8_to_f32_soa(struct gallivm_state *gallivm,
+ struct lp_type dst_type,
+ LLVMValueRef packed,
+ LLVMValueRef *rgba)
+{
+ LLVMBuilderRef builder = gallivm->builder;
+ LLVMValueRef mask = lp_build_const_int_vec(gallivm, dst_type, 0xff);
+ unsigned chan;
+
+ packed = LLVMBuildBitCast(builder, packed,
+ lp_build_int_vec_type(gallivm, dst_type), "");
+
+ /* Decode the input vector components */
+ for (chan = 0; chan < 4; ++chan) {
+ unsigned start = chan*8;
+ unsigned stop = start + 8;
+ LLVMValueRef input;
+
+ input = packed;
+
+ if (start)
+ input = LLVMBuildLShr(builder, input,
+ lp_build_const_int_vec(gallivm, dst_type, start), "");
+
+ if (stop < 32)
+ input = LLVMBuildAnd(builder, input, mask, "");
+
+ input = lp_build_unsigned_norm_to_float(gallivm, 8, dst_type, input);
+
+ rgba[chan] = input;
+ }
+}
+
+
+
+/**
+ * Fetch a texels from a texture, returning them in SoA layout.
+ *
+ * \param type the desired return type for 'rgba'. The vector length
+ * is the number of texels to fetch
+ *
+ * \param base_ptr points to start of the texture image block. For non-
+ * compressed formats, this simply points to the texel.
+ * For compressed formats, it points to the start of the
+ * compressed data block.
+ *
+ * \param i, j the sub-block pixel coordinates. For non-compressed formats
+ * these will always be (0,0). For compressed formats, i will
+ * be in [0, block_width-1] and j will be in [0, block_height-1].
+ */
+void
+lp_build_fetch_rgba_soa(struct gallivm_state *gallivm,
+ const struct util_format_description *format_desc,
+ struct lp_type type,
+ LLVMValueRef base_ptr,
+ LLVMValueRef offset,
+ LLVMValueRef i,
+ LLVMValueRef j,
+ LLVMValueRef rgba_out[4])
+{
+ LLVMBuilderRef builder = gallivm->builder;
+
+ if (format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN &&
+ (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB ||
+ format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) &&
+ format_desc->block.width == 1 &&
+ format_desc->block.height == 1 &&
+ format_desc->block.bits <= type.width &&
+ (format_desc->channel[0].type != UTIL_FORMAT_TYPE_FLOAT ||
+ format_desc->channel[0].size == 32))
+ {
+ /*
+ * The packed pixel fits into an element of the destination format. Put
+ * the packed pixels into a vector and extract each component for all
+ * vector elements in parallel.
+ */
+
+ LLVMValueRef packed;
+
+ /*
+ * gather the texels from the texture
+ * Ex: packed = {BGRA, BGRA, BGRA, BGRA}.
+ */
+ packed = lp_build_gather(gallivm,
+ type.length,
+ format_desc->block.bits,
+ type.width,
+ base_ptr, offset);
+
+ /*
+ * convert texels to float rgba
+ */
+ lp_build_unpack_rgba_soa(gallivm,
+ format_desc,
+ type,
+ packed, rgba_out);
+ return;
+ }
+
+ /*
+ * Try calling lp_build_fetch_rgba_aos for all pixels.
+ */
+
+ if (util_format_fits_8unorm(format_desc) &&
+ type.floating && type.width == 32 && type.length == 4) {
+ struct lp_type tmp_type;
+ LLVMValueRef tmp;
+
+ memset(&tmp_type, 0, sizeof tmp_type);
+ tmp_type.width = 8;
+ tmp_type.length = type.length * 4;
+ tmp_type.norm = TRUE;
+
+ tmp = lp_build_fetch_rgba_aos(gallivm, format_desc, tmp_type,
+ base_ptr, offset, i, j);
+
+ lp_build_rgba8_to_f32_soa(gallivm,
+ type,
+ tmp,
+ rgba_out);
+
+ return;
+ }
+
+ /*
+ * Fallback to calling lp_build_fetch_rgba_aos for each pixel.
+ *
+ * This is not the most efficient way of fetching pixels, as we
+ * miss some opportunities to do vectorization, but this is
+ * convenient for formats or scenarios for which there was no
+ * opportunity or incentive to optimize.
+ */
+
+ {
+ unsigned k, chan;
+ struct lp_type tmp_type;
+
+ if (gallivm_debug & GALLIVM_DEBUG_PERF) {
+ debug_printf("%s: scalar unpacking of %s\n",
+ __FUNCTION__, format_desc->short_name);
+ }
+
+ tmp_type = type;
+ tmp_type.length = 4;
+
+ for (chan = 0; chan < 4; ++chan) {
+ rgba_out[chan] = lp_build_undef(gallivm, type);
+ }
+
+ /* loop over number of pixels */
+ for(k = 0; k < type.length; ++k) {
+ LLVMValueRef index = lp_build_const_int32(gallivm, k);
+ LLVMValueRef offset_elem;
+ LLVMValueRef i_elem, j_elem;
+ LLVMValueRef tmp;
+
+ offset_elem = LLVMBuildExtractElement(builder, offset,
+ index, "");
+
+ i_elem = LLVMBuildExtractElement(builder, i, index, "");
+ j_elem = LLVMBuildExtractElement(builder, j, index, "");
+
+ /* Get a single float[4]={R,G,B,A} pixel */
+ tmp = lp_build_fetch_rgba_aos(gallivm, format_desc, tmp_type,
+ base_ptr, offset_elem,
+ i_elem, j_elem);
+
+ /*
+ * Insert the AoS tmp value channels into the SoA result vectors at
+ * position = 'index'.
+ */
+ for (chan = 0; chan < 4; ++chan) {
+ LLVMValueRef chan_val = lp_build_const_int32(gallivm, chan),
+ tmp_chan = LLVMBuildExtractElement(builder, tmp, chan_val, "");
+ rgba_out[chan] = LLVMBuildInsertElement(builder, rgba_out[chan],
+ tmp_chan, index, "");
+ }
+ }
+ }
}
projects / mesa.git / blobdiff