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gallivm: Use SSE4.1's ROUNDSS/ROUNDSD for scalar rounding.

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This commit is contained in:
José Fonseca 2010-09-29 22:27:38 +01:00
parent 21f392c971
commit e3ccfd4e03
1 changed files with 71 additions and 21 deletions
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92
src/gallium/auxiliary/gallivm/lp_bld_arit.c
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@ -989,28 +989,67 @@ lp_build_round_sse41(struct lp_build_context *bld,
enum lp_build_round_sse41_mode mode)
{
const struct lp_type type = bld->type;
LLVMTypeRef vec_type = lp_build_vec_type(type);
LLVMTypeRef i32t = LLVMInt32Type();
const char *intrinsic;
LLVMValueRef res;
assert(type.floating);
assert(type.width*type.length == 128);
assert(lp_check_value(type, a));
assert(util_cpu_caps.has_sse4_1);
switch(type.width) {
case 32:
intrinsic = "llvm.x86.sse41.round.ps";
break;
case 64:
intrinsic = "llvm.x86.sse41.round.pd";
break;
default:
assert(0);
return bld->undef;
if (type.length == 1) {
LLVMTypeRef vec_type;
LLVMValueRef undef;
LLVMValueRef args[3];
LLVMValueRef index0 = LLVMConstInt(i32t, 0, 0);
switch(type.width) {
case 32:
intrinsic = "llvm.x86.sse41.round.ss";
break;
case 64:
intrinsic = "llvm.x86.sse41.round.sd";
break;
default:
assert(0);
return bld->undef;
}
vec_type = LLVMVectorType(bld->elem_type, 4);
undef = LLVMGetUndef(vec_type);
args[0] = undef;
args[1] = LLVMBuildInsertElement(bld->builder, undef, a, index0, "");
args[2] = LLVMConstInt(i32t, mode, 0);
res = lp_build_intrinsic(bld->builder, intrinsic,
vec_type, args, Elements(args));
res = LLVMBuildExtractElement(bld->builder, res, index0, "");
}
else {
assert(type.width*type.length == 128);
switch(type.width) {
case 32:
intrinsic = "llvm.x86.sse41.round.ps";
break;
case 64:
intrinsic = "llvm.x86.sse41.round.pd";
break;
default:
assert(0);
return bld->undef;
}
res = lp_build_intrinsic_binary(bld->builder, intrinsic,
bld->vec_type, a,
LLVMConstInt(i32t, mode, 0));
}
return lp_build_intrinsic_binary(bld->builder, intrinsic, vec_type, a,
LLVMConstInt(LLVMInt32Type(), mode, 0));
return res;
}
@ -1028,8 +1067,10 @@ lp_build_trunc(struct lp_build_context *bld,
assert(type.floating);
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128)
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
return lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_TRUNCATE);
}
else {
LLVMTypeRef vec_type = lp_build_vec_type(type);
LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);
@ -1056,8 +1097,10 @@ lp_build_round(struct lp_build_context *bld,
assert(type.floating);
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128)
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
return lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_NEAREST);
}
else {
LLVMTypeRef vec_type = lp_build_vec_type(type);
LLVMValueRef res;
@ -1082,8 +1125,10 @@ lp_build_floor(struct lp_build_context *bld,
assert(type.floating);
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128)
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
return lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_FLOOR);
}
else {
LLVMTypeRef vec_type = lp_build_vec_type(type);
LLVMValueRef res;
@ -1108,8 +1153,10 @@ lp_build_ceil(struct lp_build_context *bld,
assert(type.floating);
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128)
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
return lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_CEIL);
}
else {
LLVMTypeRef vec_type = lp_build_vec_type(type);
LLVMValueRef res;
@ -1170,7 +1217,8 @@ lp_build_iround(struct lp_build_context *bld,
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128) {
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
res = lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_NEAREST);
}
else {
@ -1214,7 +1262,8 @@ lp_build_ifloor(struct lp_build_context *bld,
assert(type.floating);
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128) {
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
res = lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_FLOOR);
}
else {
@ -1264,7 +1313,8 @@ lp_build_iceil(struct lp_build_context *bld,
assert(type.floating);
assert(lp_check_value(type, a));
if (util_cpu_caps.has_sse4_1 && type.width*type.length == 128) {
if (util_cpu_caps.has_sse4_1 &&
(type.length == 1 || type.width*type.length == 128)) {
res = lp_build_round_sse41(bld, a, LP_BUILD_ROUND_SSE41_CEIL);
}
else {