From: Gert Wollny <gert.wol...@collabora.com>
The added function evaluates the array index according to the function
idx = floor(ai + 0.5);
Signed-off-by: Gert Wollny <gert.wol...@collabora.com>
---
src/gallium/drivers/r600/r600_shader.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/src/gallium/drivers/r600/r600_shader.c
b/src/gallium/drivers/r600/r600_shader.c
index 6655b000aa..e2f44afc05 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -7448,6 +7448,40 @@ static int r600_do_buffer_txq(struct r600_shader_ctx
*ctx, int reg_idx, int offs
}
}
+/* Evaluate the texture array index according to floor(z+0.5) */
+static int r600_shader_evaluate_array_index(struct r600_bytecode_alu *alu,
+
int reg, int chan, int rel,
+
struct r600_bytecode *bc)
+{
+ int r;
+
+ /* evaluate array index according to floor(z+0.5) */
+ alu->op = ALU_OP2_ADD;
+ alu->src[1].sel = V_SQ_ALU_SRC_0_5;
+ alu->dst.sel = reg;
+ alu->dst.chan = chan;
+ alu->dst.rel = rel;
+ alu->dst.write = 1;
+ alu->last = 1;
+ r = r600_bytecode_add_alu(bc, alu);
+ if (r)
+ return r;
+
+ memset(alu, 0, sizeof(struct r600_bytecode_alu));
+ alu->op = ALU_OP1_FLOOR;
+ alu->src[0].sel = reg;
+ alu->src[0].chan = chan;
+ alu->src[0].rel = rel;
+ alu->dst.sel = reg;
+ alu->dst.chan = chan;
+ alu->dst.rel = rel;
+ alu->dst.write = 1;
+ alu->last = 1;
+ r = r600_bytecode_add_alu(bc, alu);
+ if (r)
+ return r;
+ return 0;
+}
static int tgsi_tex(struct r600_shader_ctx *ctx)
{
--
2.16.4
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