Mesa (master): ac/nir: implement nir_op_{b2i,i2b}

[Dave Airlie]

Module: Mesa
Branch: master
Commit: dacf73e527a94d58407e23d3b1884d377d357f88
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dacf73e527a94d58407e23d3b1884d377d357f88

Author: Nicolai Hähnle <nicolai.haehnle at amd.com>
Date:   Sat Jun 24 20:39:39 2017 +0200

ac/nir: implement nir_op_{b2i,i2b}

Booleans in NIR are ~0 for true, b2i returns 0/1.

Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/amd/common/ac_nir_to_llvm.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 00efd8780a..8c781f2a79 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -1287,6 +1287,20 @@ static LLVMValueRef emit_b2f(struct nir_to_llvm_context *ctx,
 	return LLVMBuildAnd(ctx->builder, src0, LLVMBuildBitCast(ctx->builder, LLVMConstReal(ctx->f32, 1.0), ctx->i32, ""), "");
 }
 
+static LLVMValueRef emit_b2i(struct ac_llvm_context *ctx,
+			     LLVMValueRef src0)
+{
+	return LLVMBuildAnd(ctx->builder, src0, ctx->i32_1, "");
+}
+
+static LLVMValueRef emit_i2b(struct ac_llvm_context *ctx,
+			     LLVMValueRef src0)
+{
+	return LLVMBuildSExt(ctx->builder,
+			     LLVMBuildICmp(ctx->builder, LLVMIntNE, src0, ctx->i32_0, ""),
+			     ctx->i32, "");
+}
+
 static LLVMValueRef emit_f2f16(struct nir_to_llvm_context *ctx,
 			       LLVMValueRef src0)
 {
@@ -1808,6 +1822,12 @@ static void visit_alu(struct nir_to_llvm_context *ctx, const nir_alu_instr *inst
 	case nir_op_b2f:
 		result = emit_b2f(ctx, src[0]);
 		break;
+	case nir_op_b2i:
+		result = emit_b2i(&ctx->ac, src[0]);
+		break;
+	case nir_op_i2b:
+		result = emit_i2b(&ctx->ac, src[0]);
+		break;
 	case nir_op_fquantize2f16:
 		result = emit_f2f16(ctx, src[0]);
 		break;