--- /dev/null
+/*
+ * (C) Copyright IBM Corporation 2008
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * AUTHORS, COPYRIGHT HOLDERS, AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <inttypes.h>
+#include "pipe/p_defines.h"
+#include "pipe/p_context.h"
+#include "pipe/p_format.h"
+
+#include "pipe/draw/draw_context.h"
+#include "pipe/draw/draw_private.h"
+
+#include "pipe/cell/ppu/cell_context.h"
+#include "ppc/rtasm/spe_asm.h"
+
+typedef uint64_t register_mask;
+
+int allocate_available_register(register_mask *m)
+{
+ unsigned i;
+ for (i = 0; i < 64; i++) {
+ const uint64_t mask = (1ULL << i);
+
+ if ((m[0] & mask) != 0) {
+ m[0] &= ~mask;
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+
+int allocate_register(register_mask *m, unsigned reg)
+{
+ assert((m[0] & (1ULL << reg)) != 0);
+
+ m[0] &= ~(1ULL << reg);
+ return reg;
+}
+
+
+void release_register(register_mask *m, unsigned reg)
+{
+ assert((m[0] & (1ULL << reg)) == 0);
+
+ m[0] |= (1ULL << reg);
+}
+
+
+/**
+ * Emit a 4x4 matrix transpose operation
+ *
+ * \param p Function that the transpose operation is to be appended to
+ * \param m Live register mask
+ * \param row0 Register containing row 0 of the source matrix
+ * \param row1 Register containing row 1 of the source matrix
+ * \param row2 Register containing row 2 of the source matrix
+ * \param row3 Register containing row 3 of the source matrix
+ * \param dest_ptr Register containing the address of the destination matrix
+ * \param shuf_ptr Register containing the address of the shuffled data
+ * \param count Number of colums to actually be written to the destination
+ *
+ * \note
+ * This function assumes that the registers named by \c row0, \c row1,
+ * \c row2, and \c row3 are scratch and can be modified by the generated code.
+ * Furthermore, these registers will be released, via calls to
+ * \c release_register, by this function.
+ *
+ * \note
+ * This function requires that four temporary are available on entry.
+ */
+static void
+emit_matrix_transpose(struct spe_function *p, register_mask *m,
+ unsigned row0, unsigned row1, unsigned row2,
+ unsigned row3, unsigned dest_ptr,
+ unsigned shuf_ptr, unsigned count)
+{
+ int shuf_hi = allocate_available_register(m);
+ int shuf_lo = allocate_available_register(m);
+ int t1 = allocate_available_register(m);
+ int t2 = allocate_available_register(m);
+ int t3;
+ int t4;
+ int col0;
+ int col1;
+ int col2;
+ int col3;
+
+
+ spe_lqd(p, shuf_hi, shuf_ptr, 3);
+ spe_lqd(p, shuf_lo, shuf_ptr, 4);
+ spe_shufb(p, t1, row0, row2, shuf_hi);
+ spe_shufb(p, t2, row0, row2, shuf_lo);
+
+
+ /* row0 and row2 are now no longer needed. Re-use those registers as
+ * temporaries.
+ */
+ t3 = row0;
+ t4 = row2;
+
+ spe_shufb(p, t3, row1, row3, shuf_hi);
+ spe_shufb(p, t4, row1, row3, shuf_lo);
+
+
+ /* row1 and row3 are now no longer needed. Re-use those registers as
+ * temporaries.
+ */
+ col0 = row1;
+ col1 = row3;
+
+ spe_shufb(p, col0, t1, t3, shuf_hi);
+ if (count > 1) {
+ spe_shufb(p, col1, t1, t3, shuf_lo);
+ }
+
+ /* t1 and t3 are now no longer needed. Re-use those registers as
+ * temporaries.
+ */
+ col2 = t1;
+ col3 = t3;
+
+ if (count > 2) {
+ spe_shufb(p, col2, t2, t4, shuf_hi);
+ }
+
+ if (count > 3) {
+ spe_shufb(p, col3, t2, t4, shuf_lo);
+ }
+
+
+ /* Store the results. Remember that the stqd instruction is encoded using
+ * the qword offset (stand-alone assemblers to the byte-offset to
+ * qword-offset conversion for you), so the byte-offset needs be divided by
+ * 16.
+ */
+ switch (count) {
+ case 4:
+ spe_stqd(p, col3, dest_ptr, 3);
+ case 3:
+ spe_stqd(p, col2, dest_ptr, 2);
+ case 2:
+ spe_stqd(p, col1, dest_ptr, 1);
+ case 1:
+ spe_stqd(p, col0, dest_ptr, 0);
+ }
+
+
+ /* Release all of the temporary registers used.
+ */
+ release_register(m, col0);
+ release_register(m, col1);
+ release_register(m, col2);
+ release_register(m, col3);
+ release_register(m, shuf_hi);
+ release_register(m, shuf_lo);
+ release_register(m, t2);
+ release_register(m, t4);
+}
+
+
+static void
+emit_fetch(struct spe_function *p, register_mask *m,
+ unsigned in_ptr, unsigned *offset,
+ unsigned out_ptr, unsigned shuf_ptr,
+ enum pipe_format format)
+{
+ const unsigned count = (pf_size_x(format) != 0) + (pf_size_y(format) != 0)
+ + (pf_size_z(format) != 0) + (pf_size_w(format) != 0);
+ const unsigned type = pf_type(format);
+ const unsigned bytes = pf_size_x(format);
+
+ int v0 = allocate_available_register(m);
+ int v1 = allocate_available_register(m);
+ int v2 = allocate_available_register(m);
+ int v3 = allocate_available_register(m);
+ int tmp = allocate_available_register(m);
+ int float_zero = -1;
+ int float_one = -1;
+ float scale_signed = 0.0;
+ float scale_unsigned = 0.0;
+
+ spe_lqd(p, v0, in_ptr, 0 + offset[0]);
+ spe_lqd(p, v1, in_ptr, 1 + offset[0]);
+ spe_lqd(p, v2, in_ptr, 2 + offset[0]);
+ spe_lqd(p, v3, in_ptr, 3 + offset[0]);
+ offset[0] += 4;
+
+ switch (bytes) {
+ case 1:
+ scale_signed = 1.0f / 127.0f;
+ scale_unsigned = 1.0f / 255.0f;
+ spe_lqd(p, tmp, shuf_ptr, 1);
+ spe_shufb(p, v0, v0, v0, tmp);
+ spe_shufb(p, v1, v1, v1, tmp);
+ spe_shufb(p, v2, v2, v2, tmp);
+ spe_shufb(p, v3, v3, v3, tmp);
+ break;
+ case 2:
+ scale_signed = 1.0f / 32767.0f;
+ scale_unsigned = 1.0f / 65535.0f;
+ spe_lqd(p, tmp, shuf_ptr, 2);
+ spe_shufb(p, v0, v0, v0, tmp);
+ spe_shufb(p, v1, v1, v1, tmp);
+ spe_shufb(p, v2, v2, v2, tmp);
+ spe_shufb(p, v3, v3, v3, tmp);
+ break;
+ case 4:
+ scale_signed = 1.0f / 2147483647.0f;
+ scale_unsigned = 1.0f / 4294967295.0f;
+ break;
+ default:
+ assert(0);
+ break;
+ }
+
+ switch (type) {
+ case PIPE_FORMAT_TYPE_FLOAT:
+ break;
+ case PIPE_FORMAT_TYPE_UNORM:
+ spe_ilhu(p, tmp, ((unsigned) scale_unsigned) >> 16);
+ spe_iohl(p, tmp, ((unsigned) scale_unsigned) & 0x0ffff);
+ spe_cuflt(p, v0, v0, 0);
+ spe_fm(p, v0, v0, tmp);
+ break;
+ case PIPE_FORMAT_TYPE_SNORM:
+ spe_ilhu(p, tmp, ((unsigned) scale_signed) >> 16);
+ spe_iohl(p, tmp, ((unsigned) scale_signed) & 0x0ffff);
+ spe_csflt(p, v0, v0, 0);
+ spe_fm(p, v0, v0, tmp);
+ break;
+ case PIPE_FORMAT_TYPE_USCALED:
+ spe_cuflt(p, v0, v0, 0);
+ break;
+ case PIPE_FORMAT_TYPE_SSCALED:
+ spe_csflt(p, v0, v0, 0);
+ break;
+ }
+
+
+ if (count < 4) {
+ float_one = allocate_available_register(m);
+ spe_il(p, float_one, 1);
+ spe_cuflt(p, float_one, float_one, 0);
+
+ if (count < 3) {
+ float_zero = allocate_available_register(m);
+ spe_il(p, float_zero, 0);
+ }
+ }
+
+ release_register(m, tmp);
+
+ emit_matrix_transpose(p, m, v0, v1, v2, v3, out_ptr, shuf_ptr, count);
+
+ switch (count) {
+ case 1:
+ spe_stqd(p, float_zero, out_ptr, 1);
+ case 2:
+ spe_stqd(p, float_zero, out_ptr, 2);
+ case 3:
+ spe_stqd(p, float_one, out_ptr, 3);
+ }
+
+ if (float_zero != -1) {
+ release_register(m, float_zero);
+ }
+
+ if (float_one != -1) {
+ release_register(m, float_one);
+ }
+}
+
+
+void cell_update_vertex_fetch(struct draw_context *draw)
+{
+ struct cell_context *const cell =
+ (struct cell_context *) draw->driver_private;
+ register_mask m = ~0;
+ struct spe_function *p = &cell->attrib_fetch;
+ unsigned function_index[PIPE_ATTRIB_MAX];
+ unsigned unique_attr_formats;
+ int out_ptr;
+ int in_ptr;
+ int shuf_ptr;
+ unsigned i;
+ unsigned j;
+
+
+ /* Determine how many unique input attribute formats there are. At the
+ * same time, store the index of the lowest numbered attribute that has
+ * the same format as any non-unique format.
+ */
+ unique_attr_formats = 1;
+ function_index[0] = 0;
+ for (i = 1; i < draw->vertex_fetch.nr_attrs; i++) {
+ const enum pipe_format curr_fmt = draw->vertex_element[i].src_format;
+
+ for (j = 0; j < i; j++) {
+ if (curr_fmt == draw->vertex_element[j].src_format) {
+ break;
+ }
+ }
+
+ if (j == i) {
+ unique_attr_formats++;
+ }
+
+ function_index[i] = j;
+ }
+
+
+ /* Each fetch function can be a maximum of 34 instructions (note: this is
+ * actually a slight over-estimate). That means (34 * 4) = 136 bytes
+ * each maximum.
+ */
+ spe_init_func(p, 136 * unique_attr_formats);
+
+
+ /* Registers 0, 1, and 2 are reserved by the ABI.
+ */
+ allocate_register(&m, 0);
+ allocate_register(&m, 1);
+ allocate_register(&m, 2);
+
+
+ /* Allocate registers for the function's input parameters.
+ */
+ out_ptr = allocate_register(&m, 3);
+ in_ptr = allocate_register(&m, 4);
+ shuf_ptr = allocate_register(&m, 5);
+
+
+ /* Generate code for the individual attribute fetch functions.
+ */
+ for (i = 0; i < draw->vertex_fetch.nr_attrs; i++) {
+ unsigned offset;
+
+ if (function_index[i] == i) {
+ cell->attrib_fetch_offsets[i] = (unsigned) ((void *) p->csr
+ - (void *) p->store);
+
+ offset = 0;
+ emit_fetch(p, & m, in_ptr, &offset, out_ptr, shuf_ptr,
+ draw->vertex_element[i].src_format);
+ spe_bi(p, 0, 0, 0);
+
+ /* Round up to the next 16-byte boundary.
+ */
+ if ((((unsigned) p->store) & 0x0f) != 0) {
+ const unsigned align = ((unsigned) p->store) & 0x0f;
+ p->store = (uint32_t *) (((void *) p->store) + align);
+ }
+ } else {
+ /* Use the same function entry-point as a previously seen attribute
+ * with the same format.
+ */
+ cell->attrib_fetch_offsets[i] =
+ cell->attrib_fetch_offsets[function_index[i]];
+ }
+ }
+
+ static first_time = 1;
+ if (first_time) {
+ first_time = 0;
+ const unsigned instructions = p->csr - p->store;
+ for (i = 0; i < instructions; i++) {
+ printf("\t.long\t0x%08x\n", p->store[i]);
+ }
+ }
+}
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