From: Conor McCarthy cmccarthy@codeweavers.com
DXIL does not use implicit masking of shift counts. --- libs/vkd3d-shader/d3d_asm.c | 6 ++++++ libs/vkd3d-shader/dxil.c | 6 ++++++ libs/vkd3d-shader/spirv.c | 4 ++-- libs/vkd3d-shader/vkd3d_shader_private.h | 1 + 4 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/libs/vkd3d-shader/d3d_asm.c b/libs/vkd3d-shader/d3d_asm.c index 82d1d71d9..d7b406acb 100644 --- a/libs/vkd3d-shader/d3d_asm.c +++ b/libs/vkd3d-shader/d3d_asm.c @@ -1577,6 +1577,12 @@ static void shader_dump_instruction_flags(struct vkd3d_d3d_asm_compiler *compile shader_addline(buffer, "p"); break;
+ case VKD3DSIH_ISHL: + case VKD3DSIH_ISHR: + case VKD3DSIH_USHR: + if (ins->flags & VKD3DSI_SHIFT_UNMASKED) + shader_addline(buffer, "_unmasked"); + /* fall through */ default: shader_dump_precise_flags(compiler, ins->flags); break; diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c index beb9ae574..50afc91a0 100644 --- a/libs/vkd3d-shader/dxil.c +++ b/libs/vkd3d-shader/dxil.c @@ -3167,6 +3167,12 @@ static void sm6_parser_emit_binop(struct sm6_parser *sm6, const struct dxil_reco } else { + if (handler_idx == VKD3DSIH_ISHL || handler_idx == VKD3DSIH_ISHR || handler_idx == VKD3DSIH_USHR) + { + /* DXC emits AND instructions where necessary to mask shift counts. Shift binops + * do not imply masking the shift as the TPF equivalents do. */ + ins->flags |= VKD3DSI_SHIFT_UNMASKED; + } instruction_dst_param_init_ssa_scalar(ins, sm6); } } diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c index 2197b74dd..10d5d8b1c 100644 --- a/libs/vkd3d-shader/spirv.c +++ b/libs/vkd3d-shader/spirv.c @@ -6712,8 +6712,8 @@ static enum vkd3d_result spirv_compiler_emit_alu_instruction(struct spirv_compil * Microsoft fxc will compile immediate constants larger than 5 bits. * Fixing up the constants would be more elegant, but the simplest way is * to let this handle constants too. */ - if (instruction->handler_idx == VKD3DSIH_ISHL || instruction->handler_idx == VKD3DSIH_ISHR - || instruction->handler_idx == VKD3DSIH_USHR) + if (!(instruction->flags & VKD3DSI_SHIFT_UNMASKED) && (instruction->handler_idx == VKD3DSIH_ISHL + || instruction->handler_idx == VKD3DSIH_ISHR || instruction->handler_idx == VKD3DSIH_USHR)) { uint32_t mask_id = spirv_compiler_get_constant_vector(compiler, VKD3D_SHADER_COMPONENT_UINT, vkd3d_write_mask_component_count(dst->write_mask), 0x1f); diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h index d3989672b..faea815f1 100644 --- a/libs/vkd3d-shader/vkd3d_shader_private.h +++ b/libs/vkd3d-shader/vkd3d_shader_private.h @@ -740,6 +740,7 @@ enum vkd3d_tessellator_domain #define VKD3DSI_RESINFO_UINT 0x2 #define VKD3DSI_SAMPLE_INFO_UINT 0x1 #define VKD3DSI_SAMPLER_COMPARISON_MODE 0x1 +#define VKD3DSI_SHIFT_UNMASKED 0x1
#define VKD3DSI_PRECISE_X 0x100 #define VKD3DSI_PRECISE_Y 0x200