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gallivm: Altivec pack/unpack intrisics

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This patch adds PPC Altivec support for pack/unpack operations using Altivec
supported vector type (8xi8, 16xi16, 4xi32, 4xf32).

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Adhemerval Zanella 2012-11-22 10:54:45 -06:00 • committed by José Fonseca
parent 8b6aec6533
commit 31c63b058e
1 changed files with 30 additions and 14 deletions
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44
src/gallium/auxiliary/gallivm/lp_bld_pack.c
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@ -433,30 +433,46 @@ lp_build_pack2(struct gallivm_state *gallivm,
assert(src_type.length * 2 == dst_type.length);
/* Check for special cases first */
if(util_cpu_caps.has_sse2 && src_type.width * src_type.length >= 128) {
if((util_cpu_caps.has_sse2 || util_cpu_caps.has_altivec) &&
src_type.width * src_type.length >= 128) {
const char *intrinsic = NULL;
switch(src_type.width) {
case 32:
if(dst_type.sign) {
intrinsic = "llvm.x86.sse2.packssdw.128";
}
else {
if (util_cpu_caps.has_sse4_1) {
intrinsic = "llvm.x86.sse41.packusdw";
if (util_cpu_caps.has_sse2) {
if(dst_type.sign) {
intrinsic = "llvm.x86.sse2.packssdw.128";
}
else {
if (util_cpu_caps.has_sse4_1) {
intrinsic = "llvm.x86.sse41.packusdw";
#if HAVE_LLVM < 0x0207
/* llvm < 2.7 has inconsistent signatures except for packusdw */
intr_type = dst_type;
/* llvm < 2.7 has inconsistent signatures except for packusdw */
intr_type = dst_type;
#endif
}
}
}
} else if (util_cpu_caps.has_altivec) {
if (dst_type.sign) {
intrinsic = "llvm.ppc.altivec.vpkswus";
} else {
intrinsic = "llvm.ppc.altivec.vpkuwus";
}
}
break;
case 16:
if (dst_type.sign) {
intrinsic = "llvm.x86.sse2.packsswb.128";
}
else {
intrinsic = "llvm.x86.sse2.packuswb.128";
if (util_cpu_caps.has_sse2) {
intrinsic = "llvm.x86.sse2.packsswb.128";
} else if (util_cpu_caps.has_altivec) {
intrinsic = "llvm.ppc.altivec.vpkshss";
}
} else {
if (util_cpu_caps.has_sse2) {
intrinsic = "llvm.x86.sse2.packuswb.128";
} else if (util_cpu_caps.has_altivec) {
intrinsic = "llvm.ppc.altivec.vpkshus";
}
}
break;
/* default uses generic shuffle below */