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gallivm/nir: handle 16-bit exp/lod using intrinsics.

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This just passes the 16-bit float versions to the llvm intrinsics

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11816>
This commit is contained in:
Dave Airlie
2021-07-22 15:36:59 +10:00
committed by Marge Bot
parent 3e773501d9
commit 836b0ace10
2 changed files with 18 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/gallium/auxiliary/gallivm/lp_bld_arit.c
+16
View File
@@ -3227,6 +3227,13 @@ lp_build_exp2(struct lp_build_context *bld,
LLVMValueRef expfpart = NULL;
LLVMValueRef res = NULL;
if (type.floating && type.width == 16) {
char intrinsic[32];
lp_format_intrinsic(intrinsic, sizeof intrinsic, "llvm.exp2", vec_type);
LLVMValueRef args[] = { x };
return lp_build_intrinsic(builder, intrinsic, vec_type, args, 1, 0);
}
assert(lp_check_value(bld->type, x));
/* TODO: optimize the constant case */
@@ -3408,6 +3415,15 @@ lp_build_log2_approx(struct lp_build_context *bld,
LLVMValueRef p_z = NULL;
LLVMValueRef res = NULL;
if (bld->type.width == 16) {
char intrinsic[32];
lp_format_intrinsic(intrinsic, sizeof intrinsic, "llvm.log2", bld->vec_type);
LLVMValueRef args[] = { x };
if (p_log2)
*p_log2 = lp_build_intrinsic(builder, intrinsic, bld->vec_type, args, 1, 0);
return;
}
assert(lp_check_value(bld->type, x));
if(p_exp || p_floor_log2 || p_log2) {
src/gallium/auxiliary/gallivm/lp_bld_nir.c
+2 -2
View File
@@ -704,7 +704,7 @@ static LLVMValueRef do_alu_action(struct lp_build_nir_context *bld_base,
result = fcmp32(bld_base, PIPE_FUNC_EQUAL, src_bit_size[0], src);
break;
case nir_op_fexp2:
result = lp_build_exp2(&bld_base->base, src[0]);
result = lp_build_exp2(get_flt_bld(bld_base, src_bit_size[0]), src[0]);
break;
case nir_op_ffloor:
result = lp_build_floor(get_flt_bld(bld_base, src_bit_size[0]), src[0]);
@@ -734,7 +734,7 @@ static LLVMValueRef do_alu_action(struct lp_build_nir_context *bld_base,
result = lp_build_isfinite(get_flt_bld(bld_base, src_bit_size[0]), src[0]);
break;
case nir_op_flog2:
result = lp_build_log2_safe(&bld_base->base, src[0]);
result = lp_build_log2_safe(get_flt_bld(bld_base, src_bit_size[0]), src[0]);
break;
case nir_op_flt:
case nir_op_flt32: