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authorBrian Paul <brian.paul@tungstengraphics.com>2008-09-12 21:09:10 -0600
committerBrian Paul <brian.paul@tungstengraphics.com>2008-09-12 21:09:10 -0600
commit6f3eee921327ce76c05620eec714f2ff4f500826 (patch)
treedad9df1a1b7b226bf79f570d3fb8ce532f779e9c /src/gallium/drivers/cell
parent31a112cad4d2e515bc668b58abd4e402b4362c70 (diff)
cell: implement DDX/DDY codegen (untested)
Diffstat (limited to 'src/gallium/drivers/cell')
-rw-r--r--src/gallium/drivers/cell/ppu/cell_gen_fp.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fp.c b/src/gallium/drivers/cell/ppu/cell_gen_fp.c
index 33579fc703..a7b7dd03d3 100644
--- a/src/gallium/drivers/cell/ppu/cell_gen_fp.c
+++ b/src/gallium/drivers/cell/ppu/cell_gen_fp.c
@@ -509,6 +509,38 @@ emit_ENDIF(struct codegen *gen, const struct tgsi_full_instruction *inst)
}
+static boolean
+emit_DDX_DDY(struct codegen *gen, const struct tgsi_full_instruction *inst,
+ boolean ddx)
+{
+ int ch;
+
+ for (ch = 0; ch < 4; ch++) {
+ if (inst->FullDstRegisters[0].DstRegister.WriteMask & (1 << ch)) {
+ int s_reg = get_src_reg(gen, ch, &inst->FullSrcRegisters[0]);
+ int d_reg = get_dst_reg(gen, ch, &inst->FullDstRegisters[0]);
+
+ int t1_reg = get_itemp(gen);
+ int t2_reg = get_itemp(gen);
+
+ spe_splat_word(gen->f, t1_reg, s_reg, 0); /* upper-left pixel */
+ if (ddx) {
+ spe_splat_word(gen->f, t2_reg, s_reg, 1); /* upper-right pixel */
+ }
+ else {
+ spe_splat_word(gen->f, t2_reg, s_reg, 2); /* lower-left pixel */
+ }
+ spe_fs(gen->f, d_reg, t2_reg, t1_reg);
+
+ free_itemps(gen);
+ }
+ }
+
+ return true;
+}
+
+
+
/**
* Emit END instruction.
@@ -555,6 +587,11 @@ emit_instruction(struct codegen *gen,
case TGSI_OPCODE_ENDIF:
return emit_ENDIF(gen, inst);
+ case TGSI_OPCODE_DDX:
+ return emit_DDX_DDY(gen, inst, true);
+ case TGSI_OPCODE_DDY:
+ return emit_DDX_DDY(gen, inst, false);
+
/* XXX lots more cases to do... */
default: