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authorChristoph Bumiller <[email protected]>2009-05-23 16:14:06 +0200
committerBen Skeggs <[email protected]>2009-05-28 16:06:24 +1000
commit3accd7ebe971624bed5624f73ed3522c9de4c193 (patch)
treecbba5cb50da15af45f2ce3d125e630054755678a /src
parent94ba165dffa4d364a1335d3cd7c15558bf35fe3e (diff)
nv50: fix TXP
For TXP we need to divide texture coords by their w component, or use the coords' 1/w in the perspective interpolation instruction. This also tries to support 1D, 3D and CUBE textures, and lets the instruction only load the components that are used.
Diffstat (limited to 'src')
-rw-r--r--src/gallium/drivers/nv50/nv50_program.c135
1 files changed, 112 insertions, 23 deletions
diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index 6c07fbfe0c2..e038031f57b 100644
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -968,6 +968,113 @@ emit_kil(struct nv50_pc *pc, struct nv50_reg *src)
}
static void
+emit_tex(struct nv50_pc *pc, struct nv50_reg **dst, unsigned mask,
+ struct nv50_reg **src, unsigned unit, unsigned type, boolean proj)
+{
+ struct nv50_reg *temp, *t[4];
+ struct nv50_program_exec *e;
+
+ unsigned c, mode, dim;
+
+ switch (type) {
+ case TGSI_TEXTURE_1D:
+ dim = 1;
+ break;
+ case TGSI_TEXTURE_UNKNOWN:
+ case TGSI_TEXTURE_2D:
+ case TGSI_TEXTURE_SHADOW1D: /* XXX: x, z */
+ case TGSI_TEXTURE_RECT:
+ dim = 2;
+ break;
+ case TGSI_TEXTURE_3D:
+ case TGSI_TEXTURE_CUBE:
+ case TGSI_TEXTURE_SHADOW2D:
+ case TGSI_TEXTURE_SHADOWRECT: /* XXX */
+ dim = 3;
+ break;
+ default:
+ assert(0);
+ break;
+ }
+
+ alloc_temp4(pc, t, 0);
+
+ if (proj) {
+ if (src[0]->type == P_TEMP && src[0]->rhw != -1) {
+ mode = pc->interp_mode[src[0]->index];
+
+ t[3]->rhw = src[3]->rhw;
+ emit_interp(pc, t[3], NULL, (mode & INTERP_CENTROID));
+ emit_flop(pc, 0, t[3], t[3]);
+
+ for (c = 0; c < dim; c++) {
+ t[c]->rhw = src[c]->rhw;
+ emit_interp(pc, t[c], t[3],
+ (mode | INTERP_PERSPECTIVE));
+ }
+ } else {
+ emit_flop(pc, 0, t[3], src[3]);
+ for (c = 0; c < dim; c++)
+ emit_mul(pc, t[c], src[c], t[3]);
+
+ /* XXX: for some reason the blob sometimes uses MAD:
+ * emit_mad(pc, t[c], src[0][c], t[3], t[3])
+ * pc->p->exec_tail->inst[1] |= 0x080fc000;
+ */
+ }
+ } else {
+ if (type == TGSI_TEXTURE_CUBE) {
+ temp = temp_temp(pc);
+ emit_minmax(pc, 4, temp, src[0], src[1]);
+ emit_minmax(pc, 4, temp, temp, src[2]);
+ emit_flop(pc, 0, temp, temp);
+ for (c = 0; c < 3; c++)
+ emit_mul(pc, t[c], src[c], temp);
+ } else {
+ for (c = 0; c < dim; c++)
+ emit_mov(pc, t[c], src[c]);
+ }
+ }
+
+ e = exec(pc);
+ set_long(pc, e);
+ e->inst[0] |= 0xf0000000;
+ e->inst[1] |= 0x00000004;
+ set_dst(pc, t[0], e);
+ e->inst[0] |= (unit << 9);
+
+ if (dim == 2)
+ e->inst[0] |= 0x00400000;
+ else
+ if (dim == 3)
+ e->inst[0] |= 0x00800000;
+
+ e->inst[0] |= (mask & 0x3) << 25;
+ e->inst[1] |= (mask & 0xc) << 12;
+
+ emit(pc, e);
+
+#if 1
+ if (mask & 1) emit_mov(pc, dst[0], t[0]);
+ if (mask & 2) emit_mov(pc, dst[1], t[1]);
+ if (mask & 4) emit_mov(pc, dst[2], t[2]);
+ if (mask & 8) emit_mov(pc, dst[3], t[3]);
+
+ free_temp4(pc, t);
+#else
+ /* XXX: if p.e. MUL is used directly after TEX, it would still use
+ * the texture coordinates, not the fetched values: latency ? */
+
+ for (c = 0; c < 4; c++) {
+ if (mask & (1 << c))
+ assimilate_temp(pc, dst[c], t[c]);
+ else
+ free_temp(pc, t[c]);
+ }
+#endif
+}
+
+static void
convert_to_long(struct nv50_pc *pc, struct nv50_program_exec *e)
{
unsigned q = 0, m = ~0;
@@ -1422,30 +1529,12 @@ nv50_program_tx_insn(struct nv50_pc *pc, const union tgsi_full_token *tok)
}
break;
case TGSI_OPCODE_TEX:
+ emit_tex(pc, dst, mask, src[0], unit,
+ inst->InstructionExtTexture.Texture, FALSE);
+ break;
case TGSI_OPCODE_TXP:
- {
- struct nv50_reg *t[4];
- struct nv50_program_exec *e;
-
- alloc_temp4(pc, t, 0);
- emit_mov(pc, t[0], src[0][0]);
- emit_mov(pc, t[1], src[0][1]);
-
- e = exec(pc);
- e->inst[0] = 0xf6400000;
- e->inst[0] |= (unit << 9);
- set_long(pc, e);
- e->inst[1] |= 0x0000c004;
- set_dst(pc, t[0], e);
- emit(pc, e);
-
- if (mask & (1 << 0)) emit_mov(pc, dst[0], t[0]);
- if (mask & (1 << 1)) emit_mov(pc, dst[1], t[1]);
- if (mask & (1 << 2)) emit_mov(pc, dst[2], t[2]);
- if (mask & (1 << 3)) emit_mov(pc, dst[3], t[3]);
-
- free_temp4(pc, t);
- }
+ emit_tex(pc, dst, mask, src[0], unit,
+ inst->InstructionExtTexture.Texture, TRUE);
break;
case TGSI_OPCODE_XPD:
temp = temp_temp(pc);