diff options
Diffstat (limited to 'src/glsl/nir')
| -rw-r--r-- | src/glsl/nir/nir_intrinsics.h | 28 |
1 files changed, 17 insertions, 11 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) */ /* |