gallivm: add lp_build_emit_fetch_src() helper

lp_build_emit_fetch() is useful when the source type can be
infered from the instruction opcode.

However, for bindless samplers/images we can't do that easily
because tgsi_opcode_infer_src_type() returns TGSI_TYPE_FLOAT for
TEX instructions, while we need TGSI_TYPE_UNSIGNED64 if the
resource register is bindless.

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>

2 files changed, 24 insertions, 5 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi.c b/src/gallium/auxiliary/gallivm/lp_bld_tgsi.c
index d368f38d098..69863ab93c9 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi.c
@@ -323,16 +323,14 @@ lp_build_tgsi_inst_llvm(
 
 
 LLVMValueRef
-lp_build_emit_fetch(
+lp_build_emit_fetch_src(
    struct lp_build_tgsi_context *bld_base,
-   const struct tgsi_full_instruction *inst,
-   unsigned src_op,
+   const struct tgsi_full_src_register *reg,
+   enum tgsi_opcode_type stype,
    const unsigned chan_index)
 {
-   const struct tgsi_full_src_register *reg = &inst->Src[src_op];
    unsigned swizzle;
    LLVMValueRef res;
-   enum tgsi_opcode_type stype = tgsi_opcode_infer_src_type(inst->Instruction.Opcode);
 
    if (chan_index == LP_CHAN_ALL) {
       swizzle = ~0u;
@@ -413,7 +411,21 @@ lp_build_emit_fetch(
    }
 
    return res;
+}
+
+
+LLVMValueRef
+lp_build_emit_fetch(
+   struct lp_build_tgsi_context *bld_base,
+   const struct tgsi_full_instruction *inst,
+   unsigned src_op,
+   const unsigned chan_index)
+{
+   const struct tgsi_full_src_register *reg = &inst->Src[src_op];
+   enum tgsi_opcode_type stype =
+      tgsi_opcode_infer_src_type(inst->Instruction.Opcode);
 
+   return lp_build_emit_fetch_src(bld_base, reg, stype, chan_index);
 }
 
 
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi.h b/src/gallium/auxiliary/gallivm/lp_bld_tgsi.h
index a9f3d449e74..eb632b700ab 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi.h
@@ -643,6 +643,13 @@ lp_build_tgsi_inst_llvm(
    const struct tgsi_full_instruction *inst);
 
 LLVMValueRef
+lp_build_emit_fetch_src(
+   struct lp_build_tgsi_context *bld_base,
+   const struct tgsi_full_src_register *reg,
+   enum tgsi_opcode_type stype,
+   const unsigned chan_index);
+
+LLVMValueRef
 lp_build_emit_fetch(
    struct lp_build_tgsi_context *bld_base,
    const struct tgsi_full_instruction *inst,