mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-11-10 08:38:20 +00:00
[common] new sse2 memcpy improvements
This commit is contained in:
Geoffrey McRae
parent
3c77c1eb2b
commit
f63c8043af
@ -26,98 +26,150 @@ Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
#include "debug.h"
|
||||
|
||||
#if defined(__GNUC___) || defined(__GNUG__)
|
||||
#if defined(__GNUC__) || defined(__GNUG__)
|
||||
|
||||
#define OP(...) #__VA_ARGS__ "\n\t"
|
||||
|
||||
inline static void memcpySSE(void *dst, const void * src, size_t length)
|
||||
{
|
||||
#if defined(__x86_64__) || defined(__i386__)
|
||||
#if !defined(NATIVE_MEMCPY) && (defined(__x86_64__) || defined(__i386__))
|
||||
if (length == 0 || dst == src)
|
||||
return;
|
||||
|
||||
#ifdef __x86_64__
|
||||
void * end = dst + (length & ~0xFF);
|
||||
size_t off = (15 - ((length & 0xFF) >> 4));
|
||||
off = (off < 8) ? off * 16 : 7 * 16 + (off - 7) * 10;
|
||||
#else
|
||||
void * end = dst + (length & ~0x7F);
|
||||
size_t rem = (7 - ((length & 0x7F) >> 4)) * 10;
|
||||
size_t off = (7 - ((length & 0x7F) >> 4)) * 10;
|
||||
#endif
|
||||
|
||||
__asm__ __volatile__ (
|
||||
// save the registers we intend to alter, failure to do so causes problems
|
||||
// when gcc -O3 is used
|
||||
OP(push %[dst])
|
||||
OP(push %[src])
|
||||
OP(push %[end])
|
||||
"cmp %[dst],%[end] \n\t"
|
||||
"je Remain_%= \n\t"
|
||||
|
||||
// perform 128 byte SIMD block copy
|
||||
OP(cmp %[dst],%[end])
|
||||
OP(je ramain_%=)
|
||||
OP(loop_%=:)
|
||||
OP(vmovaps 0x00(%[src]),%%xmm0)
|
||||
OP(vmovaps 0x10(%[src]),%%xmm1)
|
||||
OP(vmovaps 0x20(%[src]),%%xmm2)
|
||||
OP(vmovaps 0x30(%[src]),%%xmm3)
|
||||
OP(vmovaps 0x40(%[src]),%%xmm4)
|
||||
OP(vmovaps 0x50(%[src]),%%xmm5)
|
||||
OP(vmovaps 0x60(%[src]),%%xmm6)
|
||||
OP(vmovaps 0x70(%[src]),%%xmm7)
|
||||
OP(vmovntdq %%xmm0,0x00(%[dst]))
|
||||
OP(vmovntdq %%xmm1,0x10(%[dst]))
|
||||
OP(vmovntdq %%xmm2,0x20(%[dst]))
|
||||
OP(vmovntdq %%xmm3,0x30(%[dst]))
|
||||
OP(vmovntdq %%xmm4,0x40(%[dst]))
|
||||
OP(vmovntdq %%xmm5,0x50(%[dst]))
|
||||
OP(vmovntdq %%xmm6,0x60(%[dst]))
|
||||
OP(vmovntdq %%xmm7,0x70(%[dst]))
|
||||
OP(add $0x80,%[dst])
|
||||
OP(add $0x80,%[src])
|
||||
OP(cmp %[dst],%[end])
|
||||
OP(jne loop_%=)
|
||||
|
||||
// copy any remaining 16 byte blocks
|
||||
OP(remain_%=:)
|
||||
// perform SIMD block copy
|
||||
"loop_%=: \n\t"
|
||||
"vmovaps 0x00(%[src]),%%xmm0 \n\t"
|
||||
"vmovaps 0x10(%[src]),%%xmm1 \n\t"
|
||||
"vmovaps 0x20(%[src]),%%xmm2 \n\t"
|
||||
"vmovaps 0x30(%[src]),%%xmm3 \n\t"
|
||||
"vmovaps 0x40(%[src]),%%xmm4 \n\t"
|
||||
"vmovaps 0x50(%[src]),%%xmm5 \n\t"
|
||||
"vmovaps 0x60(%[src]),%%xmm6 \n\t"
|
||||
"vmovaps 0x70(%[src]),%%xmm7 \n\t"
|
||||
#ifdef __x86_64__
|
||||
OP(leaq (%%rip), %[end])
|
||||
OP(add $10,%[end])
|
||||
#else
|
||||
OP(call .+5)
|
||||
OP(pop %[end])
|
||||
OP(add $8,%[end])
|
||||
"vmovaps 0x80(%[src]),%%xmm8 \n\t"
|
||||
"vmovaps 0x90(%[src]),%%xmm9 \n\t"
|
||||
"vmovaps 0xA0(%[src]),%%xmm10 \n\t"
|
||||
"vmovaps 0xB0(%[src]),%%xmm11 \n\t"
|
||||
"vmovaps 0xC0(%[src]),%%xmm12 \n\t"
|
||||
"vmovaps 0xD0(%[src]),%%xmm13 \n\t"
|
||||
"vmovaps 0xE0(%[src]),%%xmm14 \n\t"
|
||||
"vmovaps 0xF0(%[src]),%%xmm15 \n\t"
|
||||
#endif
|
||||
OP(add %[rem],%[end])
|
||||
OP(jmp *%[end])
|
||||
"vmovntdq %%xmm0 ,0x00(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm1 ,0x10(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm2 ,0x20(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm3 ,0x30(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm4 ,0x40(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm5 ,0x50(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm6 ,0x60(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm7 ,0x70(%[dst]) \n\t"
|
||||
#ifdef __x86_64__
|
||||
"vmovntdq %%xmm8 ,0x80(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm9 ,0x90(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm10,0xA0(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm11,0xB0(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm12,0xC0(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm13,0xD0(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm14,0xE0(%[dst]) \n\t"
|
||||
"vmovntdq %%xmm15,0xF0(%[dst]) \n\t"
|
||||
|
||||
// jump table
|
||||
OP(vmovaps 0x60(%[src]),%%xmm0)
|
||||
OP(vmovntdq %%xmm0,0x60(%[dst]))
|
||||
OP(vmovaps 0x50(%[src]),%%xmm1)
|
||||
OP(vmovntdq %%xmm1,0x50(%[dst]))
|
||||
OP(vmovaps 0x40(%[src]),%%xmm2)
|
||||
OP(vmovntdq %%xmm2,0x40(%[dst]))
|
||||
OP(vmovaps 0x30(%[src]),%%xmm3)
|
||||
OP(vmovntdq %%xmm3,0x30(%[dst]))
|
||||
OP(vmovaps 0x20(%[src]),%%xmm4)
|
||||
OP(vmovntdq %%xmm4,0x20(%[dst]))
|
||||
OP(vmovaps 0x10(%[src]),%%xmm5)
|
||||
OP(vmovntdq %%xmm5,0x10(%[dst]))
|
||||
OP(vmovaps 0x00(%[src]),%%xmm6)
|
||||
OP(vmovntdq %%xmm6,0x00(%[dst]))
|
||||
"add $0x100,%[dst] \n\t"
|
||||
"add $0x100,%[src] \n\t"
|
||||
#else
|
||||
"add $0x80,%[dst] \n\t"
|
||||
"add $0x80,%[src] \n\t"
|
||||
#endif
|
||||
"cmp %[dst],%[end] \n\t"
|
||||
"jne loop_%= \n\t"
|
||||
|
||||
// alignment as the previous two instructions are only 4 bytes
|
||||
OP(nop)
|
||||
OP(nop)
|
||||
"Remain_%=: \n\t"
|
||||
|
||||
// restore the registers
|
||||
OP(pop %[end])
|
||||
OP(pop %[src])
|
||||
OP(pop %[dst])
|
||||
:
|
||||
: [dst]"r" (dst),
|
||||
[src]"r" (src),
|
||||
[end]"c" (end),
|
||||
[rem]"d" (rem)
|
||||
: "xmm0",
|
||||
"xmm1",
|
||||
"xmm2",
|
||||
"xmm3",
|
||||
"xmm4",
|
||||
"xmm5",
|
||||
"xmm6",
|
||||
"xmm7",
|
||||
"memory"
|
||||
// copy any remaining 16 byte blocks
|
||||
#ifdef __x86_64__
|
||||
"leaq (%%rip), %[end]\n\t"
|
||||
"Offset_%=:\n\t"
|
||||
#else
|
||||
"call .+5 \n\t"
|
||||
"Offset_%=:\n\t"
|
||||
"pop %[end] \n\t"
|
||||
#endif
|
||||
"add $(BlockTable_%= - Offset_%=), %[end]\n\t"
|
||||
"add %[off],%[end] \n\t"
|
||||
"jmp *%[end] \n\t"
|
||||
|
||||
"BlockTable_%=:\n\t"
|
||||
#ifdef __x86_64__
|
||||
"vmovaps 0xE0(%[src]),%%xmm14 \n\t"
|
||||
"vmovntdq %%xmm14,0xE0(%[dst]) \n\t"
|
||||
"vmovaps 0xD0(%[src]),%%xmm13 \n\t"
|
||||
"vmovntdq %%xmm13,0xD0(%[dst]) \n\t"
|
||||
"vmovaps 0xC0(%[src]),%%xmm12 \n\t"
|
||||
"vmovntdq %%xmm12,0xC0(%[dst]) \n\t"
|
||||
"vmovaps 0xB0(%[src]),%%xmm11 \n\t"
|
||||
"vmovntdq %%xmm11,0xB0(%[dst]) \n\t"
|
||||
"vmovaps 0xA0(%[src]),%%xmm10 \n\t"
|
||||
"vmovntdq %%xmm10,0xA0(%[dst]) \n\t"
|
||||
"vmovaps 0x90(%[src]),%%xmm9 \n\t"
|
||||
"vmovntdq %%xmm9 ,0x90(%[dst]) \n\t"
|
||||
"vmovaps 0x80(%[src]),%%xmm8 \n\t"
|
||||
"vmovntdq %%xmm8 ,0x80(%[dst]) \n\t"
|
||||
"vmovaps 0x70(%[src]),%%xmm7 \n\t"
|
||||
"vmovntdq %%xmm7 ,0x70(%[dst]) \n\t"
|
||||
#endif
|
||||
"vmovaps 0x60(%[src]),%%xmm6 \n\t"
|
||||
"vmovntdq %%xmm6 ,0x60(%[dst]) \n\t"
|
||||
"vmovaps 0x50(%[src]),%%xmm5 \n\t"
|
||||
"vmovntdq %%xmm5 ,0x50(%[dst]) \n\t"
|
||||
"vmovaps 0x40(%[src]),%%xmm4 \n\t"
|
||||
"vmovntdq %%xmm4 ,0x40(%[dst]) \n\t"
|
||||
"vmovaps 0x30(%[src]),%%xmm3 \n\t"
|
||||
"vmovntdq %%xmm3 ,0x30(%[dst]) \n\t"
|
||||
"vmovaps 0x20(%[src]),%%xmm2 \n\t"
|
||||
"vmovntdq %%xmm2 ,0x20(%[dst]) \n\t"
|
||||
"vmovaps 0x10(%[src]),%%xmm1 \n\t"
|
||||
"vmovntdq %%xmm1 ,0x10(%[dst]) \n\t"
|
||||
"vmovaps 0x00(%[src]),%%xmm0 \n\t"
|
||||
"vmovntdq %%xmm0 ,0x00(%[dst]) \n\t"
|
||||
"nop\n\t"
|
||||
"nop\n\t"
|
||||
|
||||
: [dst]"+r" (dst),
|
||||
[src]"+r" (src),
|
||||
[end]"+r" (end)
|
||||
: [off]"r" (off)
|
||||
: "xmm0",
|
||||
"xmm1",
|
||||
"xmm2",
|
||||
"xmm3",
|
||||
"xmm4",
|
||||
"xmm5",
|
||||
"xmm6",
|
||||
"xmm7",
|
||||
#ifdef __x86_64__
|
||||
"xmm8",
|
||||
"xmm9",
|
||||
"xmm10",
|
||||
"xmm11",
|
||||
"xmm12",
|
||||
"xmm13",
|
||||
"xmm14",
|
||||
"xmm15",
|
||||
#endif
|
||||
"memory"
|
||||
);
|
||||
|
||||
//copy any remaining bytes
|
||||
@ -129,5 +181,5 @@ inline static void memcpySSE(void *dst, const void * src, size_t length)
|
||||
#endif
|
||||
}
|
||||
#else
|
||||
extern "C" void __fastcall memcpySSE(void *dst, const void * src, size_t length);
|
||||
extern "C" void memcpySSE(void *dst, const void * src, size_t length);
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user