diff options
Diffstat (limited to 'src/amd/common/ac_llvm_build.c')
| -rw-r--r-- | src/amd/common/ac_llvm_build.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c index d0bcfe2dfb3..2d78ca1b52a 100644 --- a/src/amd/common/ac_llvm_build.c +++ b/src/amd/common/ac_llvm_build.c @@ -594,6 +594,67 @@ ac_build_fdiv(struct ac_llvm_context *ctx, 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, ""); +} + +/* See fast_idiv_by_const.h. */ +/* Both operands must fit in 31 bits and the divisor must not be 1. */ +LLVMValueRef ac_build_fast_udiv_u31_d_not_one(struct ac_llvm_context *ctx, + LLVMValueRef num, + LLVMValueRef multiplier, + LLVMValueRef post_shift) +{ + LLVMBuilderRef builder = ctx->builder; + + 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. |