ioquake/ioq3
0
0
Fork 0
mirror of https://github.com/ioquake/ioq3.git synced 2025-05-30 00:20:59 +00:00
Code Issues Projects Releases Packages Wiki Activity

- align sse control word storage space to 16 byte boundary for snapvector

Browse source 
- replace some whitespace with tabs in snapvector.c
- Give gcc a bit more freedom in choice of registers
This commit is contained in:
Thilo Schulz 2011-06-22 14:36:11 +00:00
parent d9ea902c31
commit 664f8e578d
5 changed files with 52 additions and 39 deletions
Download patch file Download diff file Expand all files Collapse all files

10
code/asm/snapvector.asm
View file

@ -44,7 +44,7 @@ IFDEF idx64
; qsnapvector using SSE
qsnapvectorsse PROC
sub rsp, 4
sub rsp, 8
stmxcsr [rsp] ; save SSE control word
ldmxcsr ssecw ; set to round nearest
@ -58,19 +58,19 @@ IFDEF idx64
pop rdi
ldmxcsr [rsp] ; restore sse control word to old value
add rsp, 4
add rsp, 8
ret
qsnapvectorsse ENDP
ELSE
qsnapvectorsse PROC
sub esp, 4
sub esp, 8
stmxcsr [esp] ; save SSE control word
ldmxcsr ssecw ; set to round nearest
push edi
mov edi, dword ptr 12[esp] ; maskmovdqu uses edi as implicit memory operand
mov edi, dword ptr 16[esp] ; maskmovdqu uses edi as implicit memory operand
movaps xmm1, ssemask ; initialize the mask register for maskmovdqu
movups xmm0, [edi] ; here is stored our vector. Read 4 values in one go
cvtps2dq xmm0, xmm0 ; convert 4 single fp to int
@ -79,7 +79,7 @@ ELSE
pop edi
ldmxcsr [esp] ; restore sse control word to old value
add esp, 4
add esp, 8
ret
qsnapvectorsse ENDP