[PATCH v2 12/13] vkd3d-shader/spirv: Support orderedness inversion in comparison instructions.

[Conor McCarthy]

From: Conor McCarthy

---
 libs/vkd3d-shader/spirv.c                | 6 ++++++
 libs/vkd3d-shader/vkd3d_shader_private.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index b4ff4a027..c66db3796 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -7389,8 +7389,13 @@ static void spirv_compiler_emit_comparison_instruction(struct spirv_compiler *co
     const struct vkd3d_shader_src_param *src = instruction->src;
     uint32_t src0_id, src1_id, type_id, result_id;
     unsigned int component_count;
+    SpvOp unordered_flag = 0;
     SpvOp op;

+    /* All unordered SpvOp variants equal (ordered_opcode | 1). */
+    if (instruction->flags & VKD3DSI_FCMP_INVERT_ORDEREDNESS)
+        unordered_flag = SpvOpOrdered ^ SpvOpUnordered;
+
     switch (instruction->handler_idx)
     {
         case VKD3DSIH_DEQ:
@@ -7411,6 +7416,7 @@ static void spirv_compiler_emit_comparison_instruction(struct spirv_compiler *co
             ERR("Unexpected instruction %#x.\n", instruction->handler_idx);
             return;
     }
+    op ^= unordered_flag;

component_count = vkd3d_write_mask_component_count(dst->write_mask);

diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index c10e77f53..ab96ec245 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -731,6 +731,7 @@ enum vkd3d_tessellator_domain
 #define VKD3DSI_RESINFO_UINT            0x2
 #define VKD3DSI_SAMPLE_INFO_UINT        0x1
 #define VKD3DSI_SAMPLER_COMPARISON_MODE 0x1
+#define VKD3DSI_FCMP_INVERT_ORDEREDNESS 0x1

#define VKD3DSI_PRECISE_X         0x100
 #define VKD3DSI_PRECISE_Y         0x200