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authorBrian Paul <brian.paul@tungstengraphics.com>2008-10-22 14:48:58 -0600
committerBrian Paul <brian.paul@tungstengraphics.com>2008-10-22 14:48:58 -0600
commit51840065607337210fbba5ba1c01874293fbb42e (patch)
tree8c973a29b7e71030ee64f9b4fdab8b1355f6e3f5 /src/gallium
parentb06d0720194dfecaf45dc97cbd178411aed5205f (diff)
gallium: TGSI->PPC inequality operators
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_ppc.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ppc.c b/src/gallium/auxiliary/tgsi/tgsi_ppc.c
index dbf215c0d5..9bf364b8c4 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ppc.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ppc.c
@@ -1495,6 +1495,68 @@ emit_binop(struct gen_context *gen, struct tgsi_full_instruction *inst)
}
+/**
+ * Vector comparisons, resulting in 1.0 or 0.0 values.
+ */
+static void
+emit_inequality(struct gen_context *gen, struct tgsi_full_instruction *inst)
+{
+ int v0 = ppc_allocate_vec_register(gen->f);
+ int v1 = ppc_allocate_vec_register(gen->f);
+ int v2 = ppc_allocate_vec_register(gen->f);
+ int v_one = ppc_allocate_vec_register(gen->f);
+ uint chan_index;
+ boolean complement = FALSE;
+
+ /* v_one = splat(1.0) */
+ ppc_vload_float(gen->f, v_one, 1.0f);
+
+ FOR_EACH_DST0_ENABLED_CHANNEL(*inst, chan_index) {
+ FETCH(gen, *inst, v0, 0, chan_index); /* v0 = srcreg[0] */
+ FETCH(gen, *inst, v1, 1, chan_index); /* v1 = srcreg[1] */
+
+ switch (inst->Instruction.Opcode) {
+ case TGSI_OPCODE_SNE:
+ complement = TRUE;
+ /* fall-through */
+ case TGSI_OPCODE_SEQ:
+ ppc_vcmpeqfpx(gen->f, v2, v0, v1); /* v2 = v0 == v1 ? ~0 : 0 */
+ break;
+
+ case TGSI_OPCODE_SGE:
+ complement = TRUE;
+ /* fall-through */
+ case TGSI_OPCODE_SLT:
+ ppc_vcmpgtfpx(gen->f, v2, v1, v0); /* v2 = v1 > v0 ? ~0 : 0 */
+ break;
+
+ case TGSI_OPCODE_SLE:
+ complement = TRUE;
+ /* fall-through */
+ case TGSI_OPCODE_SGT:
+ ppc_vcmpgtfpx(gen->f, v2, v0, v1); /* v2 = v0 > v1 ? ~0 : 0 */
+ break;
+ default:
+ assert(0);
+ }
+
+ /* v2 is now {0,0,0,0} or {~0,~0,~0,~0} */
+
+ if (complement)
+ ppc_vandc(gen->f, v2, v_one, v2); /* v2 = v_one & ~v2 */
+ else
+ ppc_vand(gen->f, v2, v_one, v2); /* v2 = v_one & v2 */
+
+ STORE(gen, *inst, v2, 0, chan_index); /* store v2 */
+ }
+
+ ppc_release_vec_register(gen->f, v0);
+ ppc_release_vec_register(gen->f, v1);
+ ppc_release_vec_register(gen->f, v2);
+ ppc_release_vec_register(gen->f, v_one);
+}
+
+
static void
emit_dotprod(struct gen_context *gen, struct tgsi_full_instruction *inst)
{
@@ -1588,6 +1650,14 @@ emit_instruction(struct gen_context *gen,
case TGSI_OPCODE_MAX:
emit_binop(gen, inst);
break;
+ case TGSI_OPCODE_SEQ:
+ case TGSI_OPCODE_SNE:
+ case TGSI_OPCODE_SLT:
+ case TGSI_OPCODE_SGT:
+ case TGSI_OPCODE_SLE:
+ case TGSI_OPCODE_SGE:
+ emit_inequality(gen, inst);
+ break;
case TGSI_OPCODE_MAD:
case TGSI_OPCODE_LRP:
emit_triop(gen, inst);