; Comba/KCM Macros for C
;
; ** if mr_qltype is defined in mirdef.h use c2.mcs  **
;
; Scheduled Version
;
; Note that: 
; mr_small is a word length unsigned type
; mr_large is a double word length unsigned type
;
; Triple register is extra|sum
; The test "extra+=(sum<pp1);" checks whether the carry bit was set
; Note that this maps nicely to the MIPs SLT (Set if Less Than)
; assembly language instruction
; See makemcs.txt for more information about this file
; 
MACRO PMUL_START
  carry=0;
ENDM

MACRO PMUL
  u=(mr_large)a[%d]*sn+carry;
  carry=(mr_small)(u>>MIRACL);
  b[%d]=0;
  c[%d]=(mr_small)u;
ENDM

MACRO PMUL_END
  u=(mr_large)carry*sn;
  b[0]=(mr_small)u;
  b[1]=(mr_small)(u>>MIRACL);
ENDM

MACRO MUL_START
  extra=0;
  sum=0;
ENDM
;
; STEP macros
;
MACRO STEP
  pp1=(mr_large)a[%d]*b[%d];
  sum+=pp1;
  extra+=(sum<pp1);
ENDM
MACRO STEP1M
  pp1=(mr_large)a[%d]*b[%d];
ENDM
MACRO STEP1A
  sum+=pp1;
  extra+=(sum<pp1);
ENDM
MACRO STEP2M
  pp2=(mr_large)a[%d]*b[%d];
ENDM
MACRO STEP2A
  sum+=pp2;
  extra+=(sum<pp2);
ENDM
;
; MFIN macro
;
MACRO MFIN
  c[%d]=(mr_small)sum;  
  sum=(sum>>MIRACL)|((mr_large)extra<<MIRACL);
  extra=0;
ENDM
;
; LAST
;
MACRO LAST
  pp1=(mr_large)a[%d]*b[%d];
  sum+=pp1;
ENDM
;
; MULE
;
MACRO MUL_END
  c[%d]=(mr_small)sum;
ENDM
;
; SQR_START
;
MACRO SQR_START
  extra=0;
  sum=0;
ENDM
;
; DSTEP
;
MACRO DSTEP
  pp1=(mr_large)a[%d]*a[%d];
  sum+=pp1;
  extra+=(sum<pp1);
  sum+=pp1;
  extra+=(sum<pp1);
ENDM
MACRO DSTEP1M
  pp1=(mr_large)a[%d]*a[%d];
ENDM
MACRO DSTEP1A
  sum+=pp1;
  extra+=(sum<pp1);
  sum+=pp1;
  extra+=(sum<pp1);
ENDM
MACRO DSTEP2M
  pp2=(mr_large)a[%d]*a[%d];
ENDM
MACRO DSTEP2A
  sum+=pp2;
  extra+=(sum<pp2);
  sum+=pp2;
  extra+=(sum<pp2);
ENDM
;
; SELF
;
MACRO SELF
  pp1=(mr_large)a[%d];
  pp1*=pp1;
  sum+=pp1;
  extra+=(sum<pp1);
ENDM
;
; SFIN
;
MACRO SFIN
  c[%d]=(mr_small)sum;
  sum=(sum>>MIRACL)|((mr_large)extra<<MIRACL);
  extra=0;
ENDM
;
; SQR_END
;
MACRO SQR_END
  c[%d]=(mr_small)sum;
ENDM
;
; REDC_START
;
MACRO REDC_START
  extra=0;
  sum=a[0];
ENDM
;
; RFINU macro
;
MACRO RFINU
  sp=(mr_small)sum*ndash;
  a[%d]=sp;

  pp1=(mr_large)sp*b[0];
  sum+=pp1;
  extra+=(sum<pp1);

  sum=(sum>>MIRACL)|((mr_large)extra<<MIRACL);
  extra=0;

  sum+=(mr_large)a[%d+1];
ENDM
;  
; RFIND macro
;
MACRO RFIND
  a[%d]=(mr_small)sum;
  sum=(sum>>MIRACL)|((mr_large)extra<<MIRACL);
  extra=0;

  sum+=(mr_large)a[%d+1];
ENDM
;
; REDC_END macro
;
MACRO REDC_END
  a[%d]=(mr_small)sum;
  a[%d+1]=(mr_small)(sum>>MIRACL);
ENDM
;
; ADD_START macro
;
MACRO ADD_START
  u=(mr_large)a[0]+b[0];
  c[0]=(mr_small)u;
  carry=(mr_small)(u>>MIRACL);   
ENDM
;
; ADD macro  - c[.]=a[.]+b[.]
;
MACRO ADD 
  u=(mr_large)carry+a[%d]+b[%d];
  c[%d]=(mr_small)u;
  carry=(mr_small)(u>>MIRACL);
ENDM
;
; ADD_END macro.
;
MACRO ADD_END
ENDM
;
; DOUBLE_START macro
;
MACRO DOUBLE_START
  u=(mr_large)a[0]+a[0];
  a[0]=(mr_small)u;
  carry=(mr_small)(u>>MIRACL);  
ENDM
;
; DOUBLE macro
;
MACRO DOUBLE
  u=(mr_large)a[%d];
  u+=u;  u+=carry;
  a[%d]=(mr_small)u;
  carry=(mr_small)(u>>MIRACL);
ENDM
;
; DOUBLE_END
;
MACRO DOUBLE_END
ENDM
;
; INC_START macro. Do first one.
;
MACRO INC_START
  u=(mr_large)a[0]+b[0];
  a[0]=(mr_small)u;
  carry=(mr_small)(u>>MIRACL);
ENDM
;
; INC macro  a[.]+=b[.]
;
MACRO INC
  u=(mr_large)carry+a[%d]+b[%d];
  a[%d]=(mr_small)u;
  carry=(mr_small)(u>>MIRACL);
ENDM
MACRO INC_END
ENDM
MACRO SUB_START
  u=(mr_large)a[0]-b[0];
  c[0]=(mr_small)u;
  carry=0-(mr_small)(u>>MIRACL);
ENDM
;
; SUB macro - c[.]=a[.]-b[.]
;
MACRO SUB
  u=(mr_large)a[%d]-b[%d]-carry;
  c[%d]=(mr_small)u;
  carry=0-(mr_small)(u>>MIRACL);
ENDM
MACRO SUB_END
ENDM
;
; DEC_START macro
;
MACRO DEC_START
  u=(mr_large)a[0]-b[0];
  a[0]=(mr_small)u;
  carry=0-(mr_small)(u>>MIRACL);
ENDM
; 
; DEC macro  a[.]-=b[.]
;
MACRO DEC
  u=(mr_large)a[%d]-b[%d]-carry;
  a[%d]=(mr_small)u;
  carry=0-(mr_small)(u>>MIRACL);
ENDM
;
; DEC_END macro
;
MACRO DEC_END
ENDM
;
; KADD_START macro. Zero Carry
;
MACRO KADD_START
  carry=0;
  k%d:
ENDM
;
; KASL macro
;
MACRO KASL
 n--;
 if (n==0) goto k%d;
 a+=%d;
 b+=%d;
 c+=%d;
 goto k%d;
 k%d:
ENDM
;
; KADD_END macro
;
MACRO KADD_END   
ENDM
;
; KINC_START macro
;
MACRO KINC_START
  carry=0;
  k%d:
ENDM
;
; KIDL macro
;
MACRO KIDL
 n--;
 if (n==0) goto k%d;
 a+=%d;
 b+=%d;
 goto k%d;
 k%d:
ENDM
;
; KINC_END macro
;
MACRO KINC_END
ENDM
;
; KDEC_START macro. Zero carry
;
MACRO KDEC_START
  carry=0;
  k%d:
ENDM
;
; KDEC_END macro
;
MACRO KDEC_END
ENDM