[Mesa-dev] [PATCH] r600g: rework handling of the constants

[Vincent Lejeune]

>From Vadim Girlin patch
---
 src/gallium/drivers/r600/r600_llvm.c   |  4 ++--
 src/gallium/drivers/r600/r600_shader.c | 35 +++++++++++++++++++++++++---------
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_llvm.c 
b/src/gallium/drivers/r600/r600_llvm.c
index 2b885c9..f5a51ae 100644
--- a/src/gallium/drivers/r600/r600_llvm.c
+++ b/src/gallium/drivers/r600/r600_llvm.c
@@ -18,7 +18,7 @@
 
 #include <stdio.h>
 
-//#if defined R600_USE_LLVM || defined HAVE_OPENCL
+#if defined R600_USE_LLVM || defined HAVE_OPENCL
 
 static LLVMValueRef llvm_fetch_const(
        struct lp_build_tgsi_context * bld_base,
@@ -623,4 +623,4 @@ unsigned r600_llvm_compile(
                                                        gpu_family, dump);
 }
 
-//#endif
+#endif
diff --git a/src/gallium/drivers/r600/r600_shader.c 
b/src/gallium/drivers/r600/r600_shader.c
index f6873c3..1152c6f 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -299,15 +299,21 @@ static unsigned r600_src_from_byte_stream(unsigned char * 
bytes,
 static unsigned r600_alu_from_byte_stream(struct r600_shader_ctx *ctx,
                                unsigned char * bytes, unsigned bytes_read)
 {
-       unsigned src_idx;
+       unsigned src_idx, src_num;
        struct r600_bytecode_alu alu;
-       unsigned src_const_reg[3];
+       unsigned src_use_sel[3];
+       unsigned src_sel[3] = {};
        uint32_t word0, word1;
-
+       
+       src_num = bytes[bytes_read++];
+       
        memset(&alu, 0, sizeof(alu));
-       for(src_idx = 0; src_idx < 3; src_idx++) {
+       for(src_idx = 0; src_idx < src_num; src_idx++) {
                unsigned i;
-               src_const_reg[src_idx] = bytes[bytes_read++];
+               src_use_sel[src_idx] = bytes[bytes_read++];
+               for (i = 0; i < 4; i++) {
+                       src_sel[src_idx] |= bytes[bytes_read++] << (i * 8);
+               }
                for (i = 0; i < 4; i++) {
                        alu.src[src_idx].value |= bytes[bytes_read++] << (i * 
8);
                }
@@ -327,10 +333,21 @@ static unsigned r600_alu_from_byte_stream(struct 
r600_shader_ctx *ctx,
                break;
        }
 
-       for(src_idx = 0; src_idx < 3; src_idx++) {
-               if (src_const_reg[src_idx]) {
-                       alu.src[src_idx].kc_bank = src_const_reg[src_idx] - 1;
-                       alu.src[src_idx].sel += 512;
+       for(src_idx = 0; src_idx < src_num; src_idx++) {
+               if (src_use_sel[src_idx]) {
+                       unsigned sel = src_sel[src_idx];
+
+                       alu.src[src_idx].chan = sel & 3;
+                       sel >>= 2;
+
+                       if (sel>=512) { /* constant */
+                               sel -= 512;
+                               alu.src[src_idx].kc_bank = sel >> 12;
+                               alu.src[src_idx].sel = (sel & 4095) + 512;
+                       }
+                       else {
+                               alu.src[src_idx].sel = sel;
+                       }
                }
        }
 
-- 
1.8.0.2

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