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gallivm: Cleanup the 4 x float -> 16 ub special path in lp_build_conv.

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No behaviour change intended.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
José Fonseca 2012-06-29 21:31:59 +01:00
parent 63e0e4b8f5
commit e75fe7ba08
1 changed files with 25 additions and 48 deletions
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73
src/gallium/auxiliary/gallivm/lp_bld_conv.c
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@ -336,61 +336,38 @@ lp_build_conv(struct gallivm_state *gallivm,
util_cpu_caps.has_sse2)
{
int i;
struct lp_build_context bld;
struct lp_type int16_type = dst_type;
struct lp_type int32_type = dst_type;
LLVMValueRef const_255f;
unsigned i, j;
for (i = 0; i < num_dsts; i++, src += 4) {
struct lp_type int16_type = dst_type;
struct lp_type int32_type = dst_type;
lp_build_context_init(&bld, gallivm, src_type);
int16_type.width *= 2;
int16_type.length /= 2;
int16_type.sign = 1;
int32_type.width *= 4;
int32_type.length /= 4;
int32_type.sign = 1;
const_255f = lp_build_const_vec(gallivm, src_type, 255.0f);
for (i = 0; i < num_dsts; ++i, src += 4) {
LLVMValueRef lo, hi;
LLVMValueRef src_int0;
LLVMValueRef src_int1;
LLVMValueRef src_int2;
LLVMValueRef src_int3;
LLVMTypeRef int32_vec_type;
LLVMTypeRef src_vec_type;
LLVMValueRef const_255f;
LLVMValueRef a, b, c, d;
int16_type.width *= 2;
int16_type.length /= 2;
int16_type.sign = 1;
int32_type.width *= 4;
int32_type.length /= 4;
int32_type.sign = 1;
src_vec_type = lp_build_vec_type(gallivm, src_type);
int32_vec_type = lp_build_vec_type(gallivm, int32_type);
const_255f = lp_build_const_vec(gallivm, src_type, 255.0f);
a = LLVMBuildFMul(builder, src[0], const_255f, "");
b = LLVMBuildFMul(builder, src[1], const_255f, "");
c = LLVMBuildFMul(builder, src[2], const_255f, "");
d = LLVMBuildFMul(builder, src[3], const_255f, "");
{
struct lp_build_context bld;
bld.gallivm = gallivm;
bld.type = src_type;
bld.vec_type = src_vec_type;
bld.int_elem_type = lp_build_elem_type(gallivm, int32_type);
bld.int_vec_type = int32_vec_type;
bld.undef = lp_build_undef(gallivm, src_type);
bld.zero = lp_build_zero(gallivm, src_type);
bld.one = lp_build_one(gallivm, src_type);
src_int0 = lp_build_iround(&bld, a);
src_int1 = lp_build_iround(&bld, b);
src_int2 = lp_build_iround(&bld, c);
src_int3 = lp_build_iround(&bld, d);
for (j = 0; j < 4; ++j) {
tmp[j] = LLVMBuildFMul(builder, src[j], const_255f, "");
tmp[j] = lp_build_iround(&bld, tmp[j]);
}
/* relying on clamping behavior of sse2 intrinsics here */
lo = lp_build_pack2(gallivm, int32_type, int16_type, src_int0, src_int1);
hi = lp_build_pack2(gallivm, int32_type, int16_type, src_int2, src_int3);
lo = lp_build_pack2(gallivm, int32_type, int16_type, tmp[0], tmp[1]);
hi = lp_build_pack2(gallivm, int32_type, int16_type, tmp[2], tmp[3]);
dst[i] = lp_build_pack2(gallivm, int16_type, dst_type, lo, hi);
}
return;
}