From: Marek Olšák <marek.ol...@amd.com>
---
src/amd/common/ac_llvm_build.c | 44 ++++++++++++++++++++++++++++++++++++++++++
src/amd/common/ac_llvm_build.h | 13 +++++++++++++
2 files changed, 57 insertions(+)
diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index ab0ba09..793ff81 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -571,20 +571,64 @@ ac_build_fdiv(struct ac_llvm_context *ctx,
*/
LLVMValueRef rcp = LLVMBuildFDiv(ctx->builder, ctx->f32_1, den, "");
LLVMValueRef ret = LLVMBuildFMul(ctx->builder, num, rcp, "");
/* Use v_rcp_f32 instead of precise division. */
if (!LLVMIsConstant(ret))
LLVMSetMetadata(ret, ctx->fpmath_md_kind,
ctx->fpmath_md_2p5_ulp);
return ret;
}
+/* See fast_idiv_by_const.h. */
+/* Set: increment = util_fast_udiv_info::increment ? multiplier : 0; */
+LLVMValueRef ac_build_fast_udiv(struct ac_llvm_context *ctx,
+ LLVMValueRef num,
+ LLVMValueRef multiplier,
+ LLVMValueRef pre_shift,
+ LLVMValueRef post_shift,
+ LLVMValueRef increment)
+{
+ LLVMBuilderRef builder = ctx->builder;
+
+ num = LLVMBuildLShr(builder, num, pre_shift, "");
+ num = LLVMBuildMul(builder,
+ LLVMBuildZExt(builder, num, ctx->i64, ""),
+ LLVMBuildZExt(builder, multiplier, ctx->i64, ""),
"");
+ num = LLVMBuildAdd(builder, num,
+ LLVMBuildZExt(builder, increment, ctx->i64, ""), "");
+ num = LLVMBuildLShr(builder, num, LLVMConstInt(ctx->i64, 32, 0), "");
+ num = LLVMBuildTrunc(builder, num, ctx->i32, "");
+ return LLVMBuildLShr(builder, num, post_shift, "");
+}
+
+/* See fast_idiv_by_const.h. */
+/* If num != UINT_MAX, this more efficient version can be used. */
+/* Set: increment = util_fast_udiv_info::increment; */
+LLVMValueRef ac_build_fast_udiv_nuw(struct ac_llvm_context *ctx,
+ LLVMValueRef num,
+ LLVMValueRef multiplier,
+ LLVMValueRef pre_shift,
+ LLVMValueRef post_shift,
+ LLVMValueRef increment)
+{
+ LLVMBuilderRef builder = ctx->builder;
+
+ num = LLVMBuildLShr(builder, num, pre_shift, "");
+ num = LLVMBuildNUWAdd(builder, num, increment, "");
+ num = LLVMBuildMul(builder,
+ LLVMBuildZExt(builder, num, ctx->i64, ""),
+ LLVMBuildZExt(builder, multiplier, ctx->i64, ""),
"");
+ num = LLVMBuildLShr(builder, num, LLVMConstInt(ctx->i64, 32, 0), "");
+ num = LLVMBuildTrunc(builder, num, ctx->i32, "");
+ return LLVMBuildLShr(builder, num, post_shift, "");
+}
+
/* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
* of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
* already multiplied by two. id is the cube face number.
*/
struct cube_selection_coords {
LLVMValueRef stc[2];
LLVMValueRef ma;
LLVMValueRef id;
};
diff --git a/src/amd/common/ac_llvm_build.h b/src/amd/common/ac_llvm_build.h
index 0df9234..722faad 100644
--- a/src/amd/common/ac_llvm_build.h
+++ b/src/amd/common/ac_llvm_build.h
@@ -172,20 +172,33 @@ ac_build_gather_values(struct ac_llvm_context *ctx,
unsigned value_count);
LLVMValueRef ac_build_expand_to_vec4(struct ac_llvm_context *ctx,
LLVMValueRef value,
unsigned num_channels);
LLVMValueRef
ac_build_fdiv(struct ac_llvm_context *ctx,
LLVMValueRef num,
LLVMValueRef den);
+LLVMValueRef ac_build_fast_udiv(struct ac_llvm_context *ctx,
+ LLVMValueRef num,
+ LLVMValueRef multiplier,
+ LLVMValueRef pre_shift,
+ LLVMValueRef post_shift,
+ LLVMValueRef increment);
+LLVMValueRef ac_build_fast_udiv_nuw(struct ac_llvm_context *ctx,
+ LLVMValueRef num,
+ LLVMValueRef multiplier,
+ LLVMValueRef pre_shift,
+ LLVMValueRef post_shift,
+ LLVMValueRef increment);
+
void
ac_prepare_cube_coords(struct ac_llvm_context *ctx,
bool is_deriv, bool is_array, bool is_lod,
LLVMValueRef *coords_arg,
LLVMValueRef *derivs_arg);
LLVMValueRef
ac_build_fs_interp(struct ac_llvm_context *ctx,
LLVMValueRef llvm_chan,
--
2.7.4
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