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-rw-r--r--src/glsl/nir/nir_intrinsics.h28
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_nir.cpp2
-rw-r--r--src/mesa/drivers/dri/i965/brw_vec4_nir.cpp2
3 files changed, 19 insertions, 13 deletions
diff --git a/src/glsl/nir/nir_intrinsics.h b/src/glsl/nir/nir_intrinsics.h
index 6c7a61a8477..ed309b602c2 100644
--- a/src/glsl/nir/nir_intrinsics.h
+++ b/src/glsl/nir/nir_intrinsics.h
@@ -141,11 +141,17 @@ SYSTEM_VALUE(sample_mask_in, 1)
SYSTEM_VALUE(invocation_id, 1)
/*
- * The first and only index is the base address to load from. Indirect
- * loads have an additional register input, which is added to the constant
- * address to compute the final address to load from. For UBO's (and
- * SSBO's), the first source is the (possibly constant) UBO buffer index
- * and the indirect (if it exists) is the second source.
+ * The format of the indices depends on the type of the load. For uniforms,
+ * the first index is the base address and the second index is an offset that
+ * should be added to the base address. (This way you can determine in the
+ * back-end which variable is being accessed even in an array.) For inputs,
+ * the one and only index corresponds to the attribute slot. UBO loads also
+ * have a single index which is the base address to load from.
+ *
+ * UBO loads have a (possibly constant) source which is the UBO buffer index.
+ * For each type of load, the _indirect variant has one additional source
+ * (the second in the case of UBO's) that is the is an indirect to be added to
+ * the constant address or base offset to compute the final offset.
*
* For vector backends, the address is in terms of one vec4, and so each array
* element is +4 scalar components from the previous array element. For scalar
@@ -153,14 +159,14 @@ SYSTEM_VALUE(invocation_id, 1)
* elements begin immediately after the previous array element.
*/
-#define LOAD(name, extra_srcs, flags) \
- INTRINSIC(load_##name, extra_srcs, ARR(1), true, 0, 0, 1, flags) \
+#define LOAD(name, extra_srcs, indices, flags) \
+ INTRINSIC(load_##name, extra_srcs, ARR(1), true, 0, 0, indices, flags) \
INTRINSIC(load_##name##_indirect, extra_srcs + 1, ARR(1, 1), \
- true, 0, 0, 1, flags)
+ true, 0, 0, indices, flags)
-LOAD(uniform, 0, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
-LOAD(ubo, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
-LOAD(input, 0, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+LOAD(uniform, 0, 2, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+LOAD(ubo, 1, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+LOAD(input, 0, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/* LOAD(ssbo, 1, 0) */
/*
diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index b32f8a75e73..ad51d80fd09 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -1504,7 +1504,7 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr
has_indirect = true;
/* fallthrough */
case nir_intrinsic_load_uniform: {
- unsigned index = instr->const_index[0];
+ unsigned index = instr->const_index[0] + instr->const_index[1];
fs_reg uniform_reg;
if (index < num_direct_uniforms) {
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index 4f689dff1ba..9e52229190e 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -570,7 +570,7 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
has_indirect = true;
/* fallthrough */
case nir_intrinsic_load_uniform: {
- int uniform = instr->const_index[0];
+ int uniform = instr->const_index[0] + instr->const_index[1];
dest = get_nir_dest(instr->dest);