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ac: add 16-bit support to ac_build_umsb()

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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2018-09-14 12:52:36 +02:00
parent 3e7f3e2cd1
commit 5a6c8ca3e8
1 changed files with 16 additions and 2 deletions
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18
src/amd/common/ac_llvm_build.c
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@ -1393,17 +1393,31 @@ ac_build_umsb(struct ac_llvm_context *ctx,
LLVMTypeRef type;
LLVMValueRef highest_bit;
LLVMValueRef zero;
unsigned bitsize;
if (ac_get_elem_bits(ctx, LLVMTypeOf(arg)) == 64) {
bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(arg));
switch (bitsize) {
case 64:
intrin_name = "llvm.ctlz.i64";
type = ctx->i64;
highest_bit = LLVMConstInt(ctx->i64, 63, false);
zero = ctx->i64_0;
} else {
break;
case 32:
intrin_name = "llvm.ctlz.i32";
type = ctx->i32;
highest_bit = LLVMConstInt(ctx->i32, 31, false);
zero = ctx->i32_0;
break;
case 16:
intrin_name = "llvm.ctlz.i16";
type = ctx->i16;
highest_bit = LLVMConstInt(ctx->i16, 15, false);
zero = ctx->i16_0;
break;
default:
unreachable(!"invalid bitsize");
break;
}
LLVMValueRef params[2] = {