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experimental optimizer for float ops

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This commit is contained in:
David Anderson
2006-02-10 15:43:27 +00:00
parent b527efde41
commit dcaf3066bf
14 changed files with 474 additions and 59 deletions
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88
amxmodx/amxexecn.asm
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@@ -56,6 +56,8 @@
;
;History (list of changes)
;-------------------------
; 10 february 2006 by David Anderson
; Addition of float opcodes
; 17 february 2005 by Thiadmer Riemersms
; Addition of the BREAK opcode, removal of the older debugging opcode table.
; 6 march 2004 by Thiadmer Riemersma
@@ -1405,7 +1407,84 @@ OP_PUSHADDR:
OP_NOP:
add esi,4
GO_ON
OP_FLOAT_MUL:
add esi,4
fld dword [edi+ecx+4]
fmul dword [edi+ecx+8]
push dword 0
fstp dword [esp]
pop eax
GO_ON
OP_FLOAT_DIV:
add esi,4
fld dword [edi+ecx+4]
fdiv dword [edi+ecx+8]
push dword 0
fstp dword [esp]
pop eax
GO_ON
OP_FLOAT_ADD:
add esi,4
fld dword [edi+ecx+4]
fadd dword [edi+ecx+8]
push dword 0
fstp dword [esp]
pop eax
GO_ON
OP_FLOAT_SUB:
add esi,4
fld dword [edi+ecx+4]
fsub dword [edi+ecx+8]
push dword 0
fstp dword [esp]
pop eax
GO_ON
OP_FLOAT_TO:
add esi,4
fild dword [edi+ecx+4]
push 0
fstp dword [esp]
pop eax
GO_ON
OP_FLOAT_ROUND:
add esi,4
;get the float control word
push 0
mov ebp,esp
fstcw [ebp]
mov eax,[ebp]
push eax
;clear the top bits
xor ah,ah
;get the control method
push edx
mov edx,[edi+ecx+8]
and edx,3 ;sanity check
shl edx,2 ;shift it to right position
;set the bits
or ah,dl ;set bits 15,14 of FCW to rounding method
or ah,3 ;set precision to 64bit
mov [ebp], eax
fldcw [ebp]
;calculate
push 0
fld dword [edi+ecx+4]
frndint
fistp dword [esp]
pop eax
pop edx
;restore bits
pop ebp
mov [esp], ebp
fldcw [esp]
pop ebp
GO_ON
OP_BREAK:
mov ebp,amx ; get amx into ebp
@@ -1642,4 +1721,9 @@ _amx_opcodelist DD OP_INVALID
DD OP_SYSREQ_D
DD OP_SYMTAG
DD OP_BREAK
DD OP_FLOAT_MUL
DD OP_FLOAT_DIV
DD OP_FLOAT_ADD
DD OP_FLOAT_SUB
DD OP_FLOAT_TO
DD OP_FLOAT_ROUND