Mesa (gallium-0.2): nv50: ensure we actually get contiguous regs for TEX insn.

[Ben Skeggs]

Module: Mesa
Branch: gallium-0.2
Commit: 3f66b72fdb4834c5211305698d22806eac80aa35
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3f66b72fdb4834c5211305698d22806eac80aa35

Author: Ben Skeggs <skeggsb at gmail.com>
Date:   Mon Jan  5 13:38:47 2009 +1100

nv50: ensure we actually get contiguous regs for TEX insn.

Still many more horrible things to fix here...

---

 src/gallium/drivers/nv50/nv50_program.c |   59 ++++++++++++++++++++++---------
 1 files changed, 42 insertions(+), 17 deletions(-)

diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index d6fbdd1..566d18c 100644
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -179,6 +179,38 @@ free_temp(struct nv50_pc *pc, struct nv50_reg *r)
 	}
 }
 
+static int
+alloc_temp4(struct nv50_pc *pc, struct nv50_reg *dst[4], int idx)
+{
+	int i;
+
+	if ((idx + 4) >= NV50_SU_MAX_TEMP)
+		return 1;
+
+	if (pc->r_temp[idx] || pc->r_temp[idx + 1] ||
+	    pc->r_temp[idx + 2] || pc->r_temp[idx + 3])
+		return alloc_temp4(pc, dst, idx + 1);
+
+	for (i = 0; i < 4; i++) {
+		dst[i] = CALLOC_STRUCT(nv50_reg);
+		dst[i]->type = P_TEMP;
+		dst[i]->index = -1;
+		dst[i]->hw = idx + i;
+		pc->r_temp[idx + i] = dst[i];
+	}
+
+	return 0;
+}
+
+static void
+free_temp4(struct nv50_pc *pc, struct nv50_reg *reg[4])
+{
+	int i;
+
+	for (i = 0; i < 4; i++)
+		free_temp(pc, reg[i]);
+}
+
 static struct nv50_reg *
 temp_temp(struct nv50_pc *pc)
 {
@@ -1156,33 +1188,26 @@ nv50_program_tx_insn(struct nv50_pc *pc, const union tgsi_full_token *tok)
 		break;
 	case TGSI_OPCODE_TEX:
 		{
-			struct nv50_reg *t0, *t1, *t2, *t3;
+			struct nv50_reg *t[4];
 			struct nv50_program_exec *e;
 
-			t0 = alloc_temp(pc, NULL);
-			t0 = alloc_temp(pc, NULL);
-			t1 = alloc_temp(pc, NULL);
-			t2 = alloc_temp(pc, NULL);
-			t3 = alloc_temp(pc, NULL);
-			emit_mov(pc, t0, src[0][0]);
-			emit_mov(pc, t1, src[0][1]);
+			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;
 			set_long(pc, e);
 			e->inst[1] |= 0x0000c004;
-			set_dst(pc, t0, e);
+			set_dst(pc, t[0], e);
 			emit(pc, e);
 
-			if (mask & (1 << 0)) emit_mov(pc, dst[0], t0);
-			if (mask & (1 << 1)) emit_mov(pc, dst[1], t1);
-			if (mask & (1 << 2)) emit_mov(pc, dst[2], t2);
-			if (mask & (1 << 3)) emit_mov(pc, dst[3], t3);
+			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_temp(pc, t0);
-			free_temp(pc, t1);
-			free_temp(pc, t2);
-			free_temp(pc, t3);
+			free_temp4(pc, t);
 		}
 		break;
 	case TGSI_OPCODE_XPD: