[Nouveau] [PATCH] nv30: Support negative offsets in indirect constant access

[Roy Spliet]

Fixes piglit vp-address-01 amongst several others

Signed-off-by: Roy Spliet <r.spliet at student.tudelft.nl>
---
 src/gallium/drivers/nv30/nv30_state.h    |    2 +-
 src/gallium/drivers/nv30/nv30_vertprog.c |    4 ++--
 src/gallium/drivers/nv30/nvfx_shader.h   |    2 +-
 src/gallium/drivers/nv30/nvfx_vertprog.c |   10 ++++++++--
 4 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/gallium/drivers/nv30/nv30_state.h b/src/gallium/drivers/nv30/nv30_state.h
index 964676a..a44eb59 100644
--- a/src/gallium/drivers/nv30/nv30_state.h
+++ b/src/gallium/drivers/nv30/nv30_state.h
@@ -63,7 +63,7 @@ struct nv30_sampler_view {
 
 struct nv30_shader_reloc {
    unsigned location;
-   unsigned target;
+   signed target;
 };
 
 struct nv30_vertprog_exec {
diff --git a/src/gallium/drivers/nv30/nv30_vertprog.c b/src/gallium/drivers/nv30/nv30_vertprog.c
index 9b5ba35..1492c15 100644
--- a/src/gallium/drivers/nv30/nv30_vertprog.c
+++ b/src/gallium/drivers/nv30/nv30_vertprog.c
@@ -150,7 +150,7 @@ nv30_vertprog_validate(struct nv30_context *nv30)
             target   = vp->data->start + reloc->target;
 
             inst[1] &= ~0x0003fc000;
-            inst[1] |= target << 14;
+            inst[1] |= (target & 0x1ff) << 14;
             reloc++;
          }
       } else {
@@ -159,7 +159,7 @@ nv30_vertprog_validate(struct nv30_context *nv30)
             target   = vp->data->start + reloc->target;
 
             inst[1] &= ~0x0001ff000;
-            inst[1] |= target << 12;
+            inst[1] |= (target & 0x1ff) << 12;
             reloc++;
          }
       }
diff --git a/src/gallium/drivers/nv30/nvfx_shader.h b/src/gallium/drivers/nv30/nvfx_shader.h
index e343bf0..987e1b0 100644
--- a/src/gallium/drivers/nv30/nvfx_shader.h
+++ b/src/gallium/drivers/nv30/nvfx_shader.h
@@ -416,7 +416,7 @@
 
 struct nvfx_reg {
 	int8_t type;
-	uint32_t index;
+	int32_t index;
 };
 
 struct nvfx_src {
diff --git a/src/gallium/drivers/nv30/nvfx_vertprog.c b/src/gallium/drivers/nv30/nvfx_vertprog.c
index f41f82d..cf49c56 100644
--- a/src/gallium/drivers/nv30/nvfx_vertprog.c
+++ b/src/gallium/drivers/nv30/nvfx_vertprog.c
@@ -169,8 +169,9 @@ emit_src(struct nv30_context *nv30, struct nvfx_vpc *vpc, uint32_t *hw,
          hw[0] |= NVFX_VP(INST_INDEX_INPUT);
       else
          assert(0);
-      if(src.indirect_reg)
+      if(src.indirect_reg) {
          hw[0] |= NVFX_VP(INST_ADDR_REG_SELECT_1);
+      }
       hw[0] |= src.indirect_swz << NVFX_VP(INST_ADDR_SWZ_SHIFT);
    }
 
@@ -367,7 +368,12 @@ tgsi_src(struct nvfx_vpc *vpc, const struct tgsi_full_src_register *fsrc) {
       src.reg = nvfx_reg(NVFXSR_INPUT, fsrc->Register.Index);
       break;
    case TGSI_FILE_CONSTANT:
-      src.reg = vpc->r_const[fsrc->Register.Index];
+      if(fsrc->Register.Indirect) {
+         src.reg = vpc->r_const[0];
+         src.reg.index = fsrc->Register.Index;
+      } else {
+         src.reg = vpc->r_const[fsrc->Register.Index];
+      }
       break;
    case TGSI_FILE_IMMEDIATE:
       src.reg = vpc->imm[fsrc->Register.Index];
-- 
1.7.10.4