version 1.201, 2006/10/30 15:29:48
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version 1.205, 2007/01/05 13:36:06
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\ Gforth primitives |
\ Gforth primitives |
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\ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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Line 849 DCell d = mmul(n1,n2);
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Line 849 DCell d = mmul(n1,n2);
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#else |
#else |
DCell d = (DCell)n1 * (DCell)n2; |
DCell d = (DCell)n1 * (DCell)n2; |
#endif |
#endif |
#ifdef BUGGY_LL_DIV |
#ifdef ASM_SM_SLASH_REM |
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ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, n4, n5); |
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if (((DHI(d)^n3)<0) && n4!=0) { |
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if (CHECK_DIVISION && n5 == CELL_MIN) |
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throw(BALL_RESULTRANGE); |
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n5--; |
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n4+=n3; |
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} |
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#else |
DCell r = fmdiv(d,n3); |
DCell r = fmdiv(d,n3); |
n4=DHI(r); |
n4=DHI(r); |
n5=DLO(r); |
n5=DLO(r); |
#else |
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/* assumes that the processor uses either floored or symmetric division */ |
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DCell d5 = d/n3; |
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n4 = d%n3; |
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if (CHECK_DIVISION_SW && n3 == 0) |
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throw(BALL_DIVZERO); |
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if (FLOORED_DIV && ((DHI(d)^n3)<0) && n4!=0) { |
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d5--; |
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n4+=n3; |
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} |
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n5 = d5; |
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if (CHECK_DIVISION && d5 != n5) |
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throw(BALL_RESULTRANGE); |
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#endif |
#endif |
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: |
>r m* r> fm/mod ; |
>r m* r> fm/mod ; |
Line 877 DCell d = mmul(n1,n2);
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Line 872 DCell d = mmul(n1,n2);
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#else |
#else |
DCell d = (DCell)n1 * (DCell)n2; |
DCell d = (DCell)n1 * (DCell)n2; |
#endif |
#endif |
#ifdef BUGGY_LL_DIV |
#ifdef ASM_SM_SLASH_REM |
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Cell remainder; |
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ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, remainder, n4); |
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if (((DHI(d)^n3)<0) && remainder!=0) { |
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if (CHECK_DIVISION && n4 == CELL_MIN) |
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throw(BALL_RESULTRANGE); |
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n4--; |
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} |
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#else |
DCell r = fmdiv(d,n3); |
DCell r = fmdiv(d,n3); |
n4=DLO(r); |
n4=DLO(r); |
#else |
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/* assumes that the processor uses either floored or symmetric division */ |
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DCell d4 = d/n3; |
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if (CHECK_DIVISION_SW && n3 == 0) |
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throw(BALL_DIVZERO); |
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if (FLOORED_DIV && ((DHI(d)^n3)<0) && (d%n3)!=0) |
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d4--; |
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n4 = d4; |
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if (CHECK_DIVISION && d4 != n4) |
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throw(BALL_RESULTRANGE); |
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#endif |
#endif |
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*/mod nip ; |
*/mod nip ; |
Line 914 n2 = n1>>1;
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Line 907 n2 = n1>>1;
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fm/mod ( d1 n1 -- n2 n3 ) core f_m_slash_mod |
fm/mod ( d1 n1 -- n2 n3 ) core f_m_slash_mod |
""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}."" |
""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}."" |
#ifdef ASM_SM_SLASH_REM |
#ifdef ASM_SM_SLASH_REM |
#ifdef BUGGY_LL_DIV |
ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3); |
ASM_SM_SLASH_REM(d1.lo, d1.hi, n1, n2, n3); |
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if (((DHI(d1)^n1)<0) && n2!=0) { |
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if (CHECK_DIVISION && n3 == CELL_MIN) |
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throw(BALL_RESULTRANGE); |
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n3--; |
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n2+=n1; |
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} |
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#else |
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ASM_SM_SLASH_REM4(d1, n1, n2, n3); |
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if (((DHI(d1)^n1)<0) && n2!=0) { |
if (((DHI(d1)^n1)<0) && n2!=0) { |
if (CHECK_DIVISION && n3 == CELL_MIN) |
if (CHECK_DIVISION && n3 == CELL_MIN) |
throw(BALL_RESULTRANGE); |
throw(BALL_RESULTRANGE); |
n3--; |
n3--; |
n2+=n1; |
n2+=n1; |
} |
} |
#endif |
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#else /* !defined(ASM_SM_SLASH_REM) */ |
#else /* !defined(ASM_SM_SLASH_REM) */ |
DCell r = fmdiv(d1,n1); |
DCell r = fmdiv(d1,n1); |
n2=DHI(r); |
n2=DHI(r); |
n3=DLO(r); |
n3=DLO(r); |
#endif /* !defined(ADM_SM_SLASH_REM) */ |
#endif /* !defined(ASM_SM_SLASH_REM) */ |
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dup >r dup 0< IF negate >r dnegate r> THEN |
dup >r dup 0< IF negate >r dnegate r> THEN |
over 0< IF tuck + swap THEN |
over 0< IF tuck + swap THEN |
Line 944 n3=DLO(r);
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Line 927 n3=DLO(r);
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sm/rem ( d1 n1 -- n2 n3 ) core s_m_slash_rem |
sm/rem ( d1 n1 -- n2 n3 ) core s_m_slash_rem |
""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0."" |
""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0."" |
#ifdef BUGGY_LL_DIV |
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#ifdef ASM_SM_SLASH_REM |
#ifdef ASM_SM_SLASH_REM |
ASM_SM_SLASH_REM(d1.lo, d1.hi, n1, n2, n3); |
ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3); |
#else /* !defined(ASM_SM_SLASH_REM) */ |
#else /* !defined(ASM_SM_SLASH_REM) */ |
DCell r = smdiv(d1,n1); |
DCell r = smdiv(d1,n1); |
n2=DHI(r); |
n2=DHI(r); |
n3=DLO(r); |
n3=DLO(r); |
#endif /* !defined(ASM_SM_SLASH_REM) */ |
#endif /* !defined(ASM_SM_SLASH_REM) */ |
#else |
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#ifdef ASM_SM_SLASH_REM4 |
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ASM_SM_SLASH_REM4(d1, n1, n2, n3); |
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#else /* !defined(ASM_SM_SLASH_REM4) */ |
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/* assumes that the processor uses either floored or symmetric division */ |
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DCell d3 = d1/n1; |
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n2 = d1%n1; |
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if (CHECK_DIVISION_SW && n1 == 0) |
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throw(BALL_DIVZERO); |
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/* note that this 1%-3<0 is optimized by the compiler */ |
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if (1%-3<0 && ((DHI(d1)^n1)<0) && n2!=0) { |
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d3++; |
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n2-=n1; |
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} |
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n3 = d3; |
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if (CHECK_DIVISION && d3 != n3) |
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throw(BALL_RESULTRANGE); |
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#endif /* !defined(ASM_SM_SLASH_REM4) */ |
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#endif |
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over >r dup >r abs -rot |
over >r dup >r abs -rot |
dabs rot um/mod |
dabs rot um/mod |
Line 1006 ud = (UDCell)u1 * (UDCell)u2;
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Line 969 ud = (UDCell)u1 * (UDCell)u2;
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um/mod ( ud u1 -- u2 u3 ) core u_m_slash_mod |
um/mod ( ud u1 -- u2 u3 ) core u_m_slash_mod |
""ud=u3*u1+u2, u1>u2>=0"" |
""ud=u3*u1+u2, u1>u2>=0"" |
#ifdef BUGGY_LL_DIV |
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#ifdef ASM_UM_SLASH_MOD |
#ifdef ASM_UM_SLASH_MOD |
ASM_UM_SLASH_MOD(ud.lo, ud.hi, u1, u2, u3); |
ASM_UM_SLASH_MOD(DLO(ud), DHI(ud), u1, u2, u3); |
#else /* !defined(ASM_UM_SLASH_MOD) */ |
#else /* !defined(ASM_UM_SLASH_MOD) */ |
UDCell r = umdiv(ud,u1); |
UDCell r = umdiv(ud,u1); |
u2=DHI(r); |
u2=DHI(r); |
u3=DLO(r); |
u3=DLO(r); |
#endif /* !defined(ASM_UM_SLASH_MOD) */ |
#endif /* !defined(ASM_UM_SLASH_MOD) */ |
#else |
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#ifdef ASM_UM_SLASH_MOD4 |
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ASM_UM_SLASH_MOD4(ud, u1, u2, u3); |
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#else /* !defined(ASM_UM_SLASH_MOD4) */ |
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UDCell ud3 = ud/u1; |
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u2 = ud%u1; |
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if (CHECK_DIVISION_SW && u1 == 0) |
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throw(BALL_DIVZERO); |
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u3 = ud3; |
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if (CHECK_DIVISION && ud3 != u3) |
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throw(BALL_RESULTRANGE); |
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#endif /* !defined(ASM_UM_SLASH_MOD4) */ |
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#endif |
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0 swap [ 8 cells 1 + ] literal 0 |
0 swap [ 8 cells 1 + ] literal 0 |
?DO /modstep |
?DO /modstep |
Line 1079 d2 = -d1;
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Line 1028 d2 = -d1;
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d2* ( d1 -- d2 ) double d_two_star |
d2* ( d1 -- d2 ) double d_two_star |
""Shift left by 1; also works on unsigned numbers"" |
""Shift left by 1; also works on unsigned numbers"" |
#ifdef BUGGY_LL_SHIFT |
d2 = DLSHIFT(d1,1); |
DLO_IS(d2, DLO(d1)<<1); |
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DHI_IS(d2, (DHI(d1)<<1) | (DLO(d1)>>(CELL_BITS-1))); |
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#else |
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d2 = 2*d1; |
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#endif |
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2dup d+ ; |
2dup d+ ; |
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