turnip: Add emit functions in a header.

This adds a radv-style check_space functions + emit functions.

Also puts them in a header as a bunch of inlines, so

(1) we can use them from meta code.
(2) they are inline for performance as these are common and small.

Did not put them in tu_private.h as a bunch of inlines only
clutters up that huge headerfile.

Precise error propagation for memory allocation failures is still
todo.

1 files changed, 19 insertions, 25 deletions

diff --git a/src/freedreno/vulkan/tu_cmd_buffer.c b/src/freedreno/vulkan/tu_cmd_buffer.c
index df72d4a7b31..41bd82e3cfc 100644
--- a/src/freedreno/vulkan/tu_cmd_buffer.c
+++ b/src/freedreno/vulkan/tu_cmd_buffer.c
@@ -29,6 +29,8 @@
 
 #include "vk_format.h"
 #include "adreno_pm4.xml.h"
+#include "tu_cs.h"
+
 void
 tu_bo_list_init(struct tu_bo_list *list)
 {
@@ -200,29 +202,20 @@ tu_cmd_stream_reset(struct tu_device *dev,
    stream->entry_count = 0;
 }
 
-static unsigned
-_odd_parity_bit(unsigned val)
-{
-        /* See: http://graphics.stanford.edu/~seander/bithacks.html#ParityParallel
-         * note that we want odd parity so 0x6996 is inverted.
-         */
-        val ^= val >> 16;
-        val ^= val >> 8;
-        val ^= val >> 4;
-        val &= 0xf;
-        return (~0x6996 >> val) & 1;
-}
-
-static void
-OUT_PKT7(struct tu_cmd_stream *stream, uint8_t opcode, uint16_t cnt)
+VkResult
+tu_cs_check_space(struct tu_device *dev,
+                  struct tu_cmd_stream *stream,
+                  size_t size)
 {
-   *stream->cur++ = CP_TYPE7_PKT | cnt |
-                   (_odd_parity_bit(cnt) << 15) |
-                   ((opcode & 0x7f) << 16) |
-                   ((_odd_parity_bit(opcode) << 23));
-}
+   if (stream->end - stream->cur >= size)
+      return VK_SUCCESS;
 
+   VkResult result = tu_cmd_stream_end(stream);
+   if (result != VK_SUCCESS)
+      return result;
 
+   return tu_cmd_stream_begin(dev, stream, size);
+}
 
 const struct tu_dynamic_state default_dynamic_state = {
    .viewport =
@@ -553,11 +546,12 @@ tu_BeginCommandBuffer(VkCommandBuffer commandBuffer,
                                 &cmd_buffer->cs, 4096);
 
    /* Put some stuff in so we do not have empty command buffers. */
-   OUT_PKT7(&cmd_buffer->cs, CP_NOP, 4);
-   *cmd_buffer->cs.cur++ = 0;
-   *cmd_buffer->cs.cur++ = 0;
-   *cmd_buffer->cs.cur++ = 0;
-   *cmd_buffer->cs.cur++ = 0;
+   tu_cs_emit_pkt7(&cmd_buffer->cs, CP_NOP, 4);
+   tu_cs_emit(&cmd_buffer->cs, 0);
+   tu_cs_emit(&cmd_buffer->cs, 0);
+   tu_cs_emit(&cmd_buffer->cs, 0);
+   tu_cs_emit(&cmd_buffer->cs, 0);
+
    return result;
 }