Mesa (master): ac: add 8-bit and 64-bit support to ac_build_bitfield_reverse()

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Module: Mesa
Branch: master
Commit: d099bc5829fffce658c7155cb2459b79b45ebbc7
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d099bc5829fffce658c7155cb2459b79b45ebbc7

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Mon Apr  1 16:18:10 2019 +0200

ac: add 8-bit and 64-bit support to ac_build_bitfield_reverse()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>

---

 src/amd/common/ac_llvm_build.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 8d749cc8eb0..54e90288bda 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -2585,6 +2585,13 @@ LLVMValueRef ac_build_bitfield_reverse(struct ac_llvm_context *ctx,
 	bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(src0));
 
 	switch (bitsize) {
+	case 64:
+		result = ac_build_intrinsic(ctx, "llvm.bitreverse.i64", ctx->i64,
+					    (LLVMValueRef []) { src0 }, 1,
+					    AC_FUNC_ATTR_READNONE);
+
+		result = LLVMBuildTrunc(ctx->builder, result, ctx->i32, "");
+		break;
 	case 32:
 		result = ac_build_intrinsic(ctx, "llvm.bitreverse.i32", ctx->i32,
 					    (LLVMValueRef []) { src0 }, 1,
@@ -2597,6 +2604,13 @@ LLVMValueRef ac_build_bitfield_reverse(struct ac_llvm_context *ctx,
 
 		result = LLVMBuildZExt(ctx->builder, result, ctx->i32, "");
 		break;
+	case 8:
+		result = ac_build_intrinsic(ctx, "llvm.bitreverse.i8", ctx->i8,
+					    (LLVMValueRef []) { src0 }, 1,
+					    AC_FUNC_ATTR_READNONE);
+
+		result = LLVMBuildZExt(ctx->builder, result, ctx->i32, "");
+		break;
 	default:
 		unreachable(!"invalid bitsize");
 		break;