archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 14:54:52 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8005544: Use 256bit YMM registers in arraycopy stubs on x86

Browse source 
Use YMM registers in arraycopy and array_fill stubs.

Reviewed-by: roland, twisti
This commit is contained in:
Vladimir Kozlov 2013-01-03 16:30:47 -08:00
parent cfcd28fd9d
commit 7b9133b99c
5 changed files with 194 additions and 88 deletions
Download patch file Download diff file Expand all files Collapse all files

9
hotspot/src/cpu/x86/vm/assembler_x86.cpp
View file

@ -3656,6 +3656,15 @@ void Assembler::vextracti128h(Address dst, XMMRegister src) {
emit_int8(0x01);
}
// duplicate 4-bytes integer data from src into 8 locations in dest
void Assembler::vpbroadcastd(XMMRegister dst, XMMRegister src) {
assert(VM_Version::supports_avx2(), "");
bool vector256 = true;
int encode = vex_prefix_and_encode(dst, xnoreg, src, VEX_SIMD_66, vector256, VEX_OPCODE_0F_38);
emit_int8(0x58);
emit_int8((unsigned char)(0xC0 | encode));
}
void Assembler::vzeroupper() {
assert(VM_Version::supports_avx(), "");
(void)vex_prefix_and_encode(xmm0, xmm0, xmm0, VEX_SIMD_NONE);