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|
//===----------------------Hexagon builtin routine ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/* ==================================================================== */
/* FUNCTIONS Optimized double floating point operators */
/* ==================================================================== */
/* c = dadd_asm(a, b) */
/* ====================================================================
QDOUBLE dadd(QDOUBLE a,QDOUBLE b) {
QDOUBLE c;
lint manta = a & MANTMASK;
int expa = HEXAGON_R_sxth_R(a) ;
lint mantb = b & MANTMASK;
int expb = HEXAGON_R_sxth_R(b) ;
int exp, expdiff, j, k, hi, lo, cn;
lint mant;
expdiff = (int) HEXAGON_P_vabsdiffh_PP(a, b);
expdiff = HEXAGON_R_sxth_R(expdiff) ;
if (expdiff > 63) { expdiff = 62;}
if (expa > expb) {
exp = expa + 1;
expa = 1;
expb = expdiff + 1;
} else {
exp = expb + 1;
expb = 1;
expa = expdiff + 1;
}
mant = (manta>>expa) + (mantb>>expb);
hi = (int) (mant>>32);
lo = (int) (mant);
k = HEXAGON_R_normamt_R(hi);
if(hi == 0 || hi == -1) k = 31+HEXAGON_R_normamt_R(lo);
mant = (mant << k);
cn = (mant == 0x8000000000000000LL);
exp = exp - k + cn;
if (mant == 0 || mant == -1) exp = 0x8001;
c = (mant & MANTMASK) | (((lint) exp) & EXP_MASK);
return(c);
}
* ==================================================================== */
.text
.global dadd_asm
.type dadd_asm, @function
dadd_asm:
#define manta R0
#define mantexpa R1:0
#define lmanta R1:0
#define mantb R2
#define mantexpb R3:2
#define lmantb R3:2
#define expa R4
#define expb R5
#define mantexpd R7:6
#define expd R6
#define exp R8
#define c63 R9
#define lmant R1:0
#define manth R1
#define mantl R0
#define zero R7:6
#define zerol R6
#define minus R3:2
#define minusl R2
#define maxneg R9
#define minmin R11:10 // exactly 0x800000000000000000LL
#define minminh R11
#define k R4
#define kl R5
#define ce P0
.falign
{
mantexpd = VABSDIFFH(mantexpa, mantexpb) //represented as 0x08001LL
c63 = #62
expa = SXTH(manta)
expb = SXTH(mantb)
} {
expd = SXTH(expd)
ce = CMP.GT(expa, expb);
if ( ce.new) exp = add(expa, #1)
if (!ce.new) exp = add(expb, #1)
} {
if ( ce) expa = #1
if (!ce) expb = #1
manta.L = #0
expd = MIN(expd, c63)
} {
if (!ce) expa = add(expd, #1)
if ( ce) expb = add(expd, #1)
mantb.L = #0
zero = #0
} {
lmanta = ASR(lmanta, expa)
lmantb = ASR(lmantb, expb)
minmin = #0
} {
lmant = add(lmanta, lmantb)
minus = #-1
minminh.H = #0x8000
} {
k = NORMAMT(manth)
kl = NORMAMT(mantl)
p0 = cmp.eq(manth, zerol)
p1 = cmp.eq(manth, minusl)
} {
p0 = OR(p0, p1)
if(p0.new) k = add(kl, #31)
maxneg.H = #0
} {
mantexpa = ASL(lmant, k)
exp = SUB(exp, k)
maxneg.L = #0x8001
} {
p0 = cmp.eq(mantexpa, zero)
p1 = cmp.eq(mantexpa, minus)
manta.L = #0
exp = ZXTH(exp)
} {
p2 = cmp.eq(mantexpa, minmin) //is result 0x80....0
if(p2.new) exp = add(exp, #1)
}
#if (__HEXAGON_ARCH__ == 60)
{
p0 = OR(p0, p1)
if( p0.new) manta = OR(manta,maxneg)
if(!p0.new) manta = OR(manta,exp)
}
jumpr r31
#else
{
p0 = OR(p0, p1)
if( p0.new) manta = OR(manta,maxneg)
if(!p0.new) manta = OR(manta,exp)
jumpr r31
}
#endif
/* =================================================================== *
QDOUBLE dsub(QDOUBLE a,QDOUBLE b) {
QDOUBLE c;
lint manta = a & MANTMASK;
int expa = HEXAGON_R_sxth_R(a) ;
lint mantb = b & MANTMASK;
int expb = HEXAGON_R_sxth_R(b) ;
int exp, expdiff, j, k, hi, lo, cn;
lint mant;
expdiff = (int) HEXAGON_P_vabsdiffh_PP(a, b);
expdiff = HEXAGON_R_sxth_R(expdiff) ;
if (expdiff > 63) { expdiff = 62;}
if (expa > expb) {
exp = expa + 1;
expa = 1;
expb = expdiff + 1;
} else {
exp = expb + 1;
expb = 1;
expa = expdiff + 1;
}
mant = (manta>>expa) - (mantb>>expb);
hi = (int) (mant>>32);
lo = (int) (mant);
k = HEXAGON_R_normamt_R(hi);
if(hi == 0 || hi == -1) k = 31+HEXAGON_R_normamt_R(lo);
mant = (mant << k);
cn = (mant == 0x8000000000000000LL);
exp = exp - k + cn;
if (mant == 0 || mant == -1) exp = 0x8001;
c = (mant & MANTMASK) | (((lint) exp) & EXP_MASK);
return(c);
}
* ==================================================================== */
.text
.global dsub_asm
.type dsub_asm, @function
dsub_asm:
#define manta R0
#define mantexpa R1:0
#define lmanta R1:0
#define mantb R2
#define mantexpb R3:2
#define lmantb R3:2
#define expa R4
#define expb R5
#define mantexpd R7:6
#define expd R6
#define exp R8
#define c63 R9
#define lmant R1:0
#define manth R1
#define mantl R0
#define zero R7:6
#define zerol R6
#define minus R3:2
#define minusl R2
#define maxneg R9
#define minmin R11:10 // exactly 0x800000000000000000LL
#define minminh R11
#define k R4
#define kl R5
#define ce P0
.falign
{
mantexpd = VABSDIFFH(mantexpa, mantexpb) //represented as 0x08001LL
c63 = #62
expa = SXTH(manta)
expb = SXTH(mantb)
} {
expd = SXTH(expd)
ce = CMP.GT(expa, expb);
if ( ce.new) exp = add(expa, #1)
if (!ce.new) exp = add(expb, #1)
} {
if ( ce) expa = #1
if (!ce) expb = #1
manta.L = #0
expd = MIN(expd, c63)
} {
if (!ce) expa = add(expd, #1)
if ( ce) expb = add(expd, #1)
mantb.L = #0
zero = #0
} {
lmanta = ASR(lmanta, expa)
lmantb = ASR(lmantb, expb)
minmin = #0
} {
lmant = sub(lmanta, lmantb)
minus = #-1
minminh.H = #0x8000
} {
k = NORMAMT(manth)
kl = NORMAMT(mantl)
p0 = cmp.eq(manth, zerol)
p1 = cmp.eq(manth, minusl)
} {
p0 = OR(p0, p1)
if(p0.new) k = add(kl, #31)
maxneg.H = #0
} {
mantexpa = ASL(lmant, k)
exp = SUB(exp, k)
maxneg.L = #0x8001
} {
p0 = cmp.eq(mantexpa, zero)
p1 = cmp.eq(mantexpa, minus)
manta.L = #0
exp = ZXTH(exp)
} {
p2 = cmp.eq(mantexpa, minmin) //is result 0x80....0
if(p2.new) exp = add(exp, #1)
}
#if (__HEXAGON_ARCH__ == 60)
{
p0 = OR(p0, p1)
if( p0.new) manta = OR(manta,maxneg)
if(!p0.new) manta = OR(manta,exp)
}
jumpr r31
#else
{
p0 = OR(p0, p1)
if( p0.new) manta = OR(manta,maxneg)
if(!p0.new) manta = OR(manta,exp)
jumpr r31
}
#endif
/* ==================================================================== *
QDOUBLE dmpy(QDOUBLE a,QDOUBLE b) {
QDOUBLE c;
lint manta = a & MANTMASK;
int expa = HEXAGON_R_sxth_R(a) ;
lint mantb = b & MANTMASK;
int expb = HEXAGON_R_sxth_R(b) ;
int exp, k;
lint mant;
int hia, hib, hi, lo;
unsigned int loa, lob;
hia = (int)(a >> 32);
loa = HEXAGON_R_extractu_RII((int)manta, 31, 1);
hib = (int)(b >> 32);
lob = HEXAGON_R_extractu_RII((int)mantb, 31, 1);
mant = HEXAGON_P_mpy_RR(hia, lob);
mant = HEXAGON_P_mpyacc_RR(mant,hib, loa);
mant = (mant >> 30) + (HEXAGON_P_mpy_RR(hia, hib)<<1);
hi = (int) (mant>>32);
lo = (int) (mant);
k = HEXAGON_R_normamt_R(hi);
if(hi == 0 || hi == -1) k = 31+HEXAGON_R_normamt_R(lo);
mant = mant << k;
exp = expa + expb - k;
if (mant == 0 || mant == -1) exp = 0x8001;
c = (mant & MANTMASK) | (((lint) exp) & EXP_MASK);
return(c);
}
* ==================================================================== */
.text
.global dmpy_asm
.type dmpy_asm, @function
dmpy_asm:
#define mantal R0
#define mantah R1
#define mantexpa R1:0
#define mantbl R2
#define mantbh R3
#define mantexpb R3:2
#define expa R4
#define expb R5
#define mantexpd R7:6
#define exp R8
#define lmantc R11:10
#define mantch R11
#define mantcl R10
#define zero0 R7:6
#define zero0l R6
#define minus1 R3:2
#define minus1l R2
#define maxneg R9
#define k R4
#define kl R5
.falign
{
mantbl = lsr(mantbl, #16)
mantal = lsr(mantal, #16)
expa = sxth(mantal)
expb = sxth(mantbl)
}
{
lmantc = mpy(mantah, mantbh)
mantexpd = mpy(mantah, mantbl)
}
{
lmantc = add(lmantc, lmantc) //<<1
mantexpd+= mpy(mantbh, mantal)
}
{
lmantc += asr(mantexpd, #15)
exp = add(expa, expb)
zero0 = #0
minus1 = #-1
}
{
k = normamt(mantch)
kl = normamt(mantcl)
p0 = cmp.eq(mantch, zero0l)
p1 = cmp.eq(mantch, minus1l)
}
{
p0 = or(p0, p1)
if(p0.new) k = add(kl, #31)
maxneg.H = #0
}
{
mantexpa = asl(lmantc, k)
exp = sub(exp, k)
maxneg.L = #0x8001
}
{
p0 = cmp.eq(mantexpa, zero0)
p1 = cmp.eq(mantexpa, minus1)
mantal.L = #0
exp = zxth(exp)
}
#if (__HEXAGON_ARCH__ == 60)
{
p0 = or(p0, p1)
if( p0.new) mantal = or(mantal,maxneg)
if(!p0.new) mantal = or(mantal,exp)
}
jumpr r31
#else
{
p0 = or(p0, p1)
if( p0.new) mantal = or(mantal,maxneg)
if(!p0.new) mantal = or(mantal,exp)
jumpr r31
}
#endif
|
