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r600/shader: add get_lds_offset0 helper

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This retrievs the offset into the LDS for a patch or
non-patch variable, it takes the RelPatch channel
and a temporary register.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2015-11-30 15:39:58 +10:00
parent 2a9639e41f
commit 4477be2404
1 changed files with 22 additions and 0 deletions
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src/gallium/drivers/r600/r600_shader.c
+22
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@@ -763,6 +763,28 @@ static int single_alu_op3(struct r600_shader_ctx *ctx, int op,
return 0;
}
/* put it in temp_reg.x */
static int get_lds_offset0(struct r600_shader_ctx *ctx,
int rel_patch_chan,
int temp_reg, bool is_patch_var)
{
int r;
/* MUL temp.x, patch_stride (input_vals.x), rel_patch_id (r0.y (tcs)) */
/* ADD
Dimension - patch0_offset (input_vals.z),
Non-dim - patch0_data_offset (input_vals.w)
*/
r = single_alu_op3(ctx, ALU_OP3_MULADD_UINT24,
temp_reg, 0,
ctx->tess_output_info, 0,
0, rel_patch_chan,
ctx->tess_output_info, is_patch_var ? 3 : 2);
if (r)
return r;
return 0;
}
static inline int get_address_file_reg(struct r600_shader_ctx *ctx, int index)
{
return index > 0 ? ctx->bc->index_reg[index - 1] : ctx->bc->ar_reg;