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ac: add 8-bit and 16-bit supports to ac_build_readlane() 

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2019-11-08 13:00:50 +01:00
parent 58d5ab98a3
commit c29514bd22
1 changed files with 16 additions and 6 deletions
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22
src/amd/llvm/ac_llvm_build.c
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@ -3566,14 +3566,23 @@ void ac_apply_fmask_to_sample(struct ac_llvm_context *ac, LLVMValueRef fmask,
static LLVMValueRef
_ac_build_readlane(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef lane)
{
LLVMTypeRef type = LLVMTypeOf(src);
LLVMValueRef result;
ac_build_optimization_barrier(ctx, &src);
return ac_build_intrinsic(ctx,
src = LLVMBuildZExt(ctx->builder, src, ctx->i32, "");
if (lane)
lane = LLVMBuildZExt(ctx->builder, lane, ctx->i32, "");
result = ac_build_intrinsic(ctx,
lane == NULL ? "llvm.amdgcn.readfirstlane" : "llvm.amdgcn.readlane",
LLVMTypeOf(src), (LLVMValueRef []) {
src, lane },
ctx->i32, (LLVMValueRef []) { src, lane },
lane == NULL ? 1 : 2,
AC_FUNC_ATTR_READNONE |
AC_FUNC_ATTR_CONVERGENT);
return LLVMBuildTrunc(ctx->builder, result, type, "");
}
/**
@ -3591,9 +3600,7 @@ ac_build_readlane(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef la
unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(src));
LLVMValueRef ret;
if (bits == 32) {
ret = _ac_build_readlane(ctx, src, lane);
} else {
if (bits > 32) {
assert(bits % 32 == 0);
LLVMTypeRef vec_type = LLVMVectorType(ctx->i32, bits / 32);
LLVMValueRef src_vector =
@ -3606,7 +3613,10 @@ ac_build_readlane(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef la
ret = LLVMBuildInsertElement(ctx->builder, ret, ret_comp,
LLVMConstInt(ctx->i32, i, 0), "");
}
} else {
ret = _ac_build_readlane(ctx, src, lane);
}
if (LLVMGetTypeKind(src_type) == LLVMPointerTypeKind)
return LLVMBuildIntToPtr(ctx->builder, ret, src_type, "");
return LLVMBuildBitCast(ctx->builder, ret, src_type, "");