diff options
| author | Dave Airlie <[email protected]> | 2019-11-20 11:44:22 +1000 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2019-11-28 14:48:32 +1000 |
| commit | 9461f2b5df2f243896748d65d375ed12e1befe04 (patch) | |
| tree | 875cd3f3579a7735a422a4f00aa31baa000dfb83 | |
| parent | 1a608901cc51b186d621d18b4a81907ef7216e01 (diff) | |
gallivm: add cttz wrapper
this will be used to write find_lsb support
Reviewed-by: Roland Scheidegger <[email protected]>
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_bitarit.c | 14 | ||||
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_bitarit.h | 3 |
2 files changed, 17 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_bitarit.c b/src/gallium/auxiliary/gallivm/lp_bld_bitarit.c index 998d3592199..c717b988f27 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_bitarit.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_bitarit.c @@ -252,3 +252,17 @@ lp_build_popcount(struct lp_build_context *bld, LLVMValueRef a) result = lp_build_intrinsic_unary(builder, intr_str, bld->vec_type, a); return result; } + +LLVMValueRef +lp_build_cttz(struct lp_build_context *bld, LLVMValueRef a) +{ + LLVMBuilderRef builder = bld->gallivm->builder; + LLVMValueRef result; + char intr_str[256]; + + lp_format_intrinsic(intr_str, sizeof(intr_str), "llvm.cttz", bld->vec_type); + + LLVMValueRef undef_val = LLVMConstNull(LLVMInt1TypeInContext(bld->gallivm->context)); + result = lp_build_intrinsic_binary(builder, intr_str, bld->vec_type, a, undef_val); + return result; +} diff --git a/src/gallium/auxiliary/gallivm/lp_bld_bitarit.h b/src/gallium/auxiliary/gallivm/lp_bld_bitarit.h index e0f4f4aa3bc..989ce5ca568 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_bitarit.h +++ b/src/gallium/auxiliary/gallivm/lp_bld_bitarit.h @@ -73,4 +73,7 @@ lp_build_not(struct lp_build_context *bld, LLVMValueRef a); LLVMValueRef lp_build_popcount(struct lp_build_context *bld, LLVMValueRef a); + +LLVMValueRef +lp_build_cttz(struct lp_build_context *bld, LLVMValueRef a); #endif /* !LP_BLD_ARIT_H */ |