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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
//
//===----------------------------------------------------------------------===//
/* ==================================================================== *
fast2_QLDOUBLE fast2_ldadd(fast2_QLDOUBLE a,fast2_QLDOUBLE b) {
fast2_QLDOUBLE c;
lint manta = a & MANTMASK;
int expa = Q6_R_sxth_R(a) ;
lint mantb = b & MANTMASK;
int expb = Q6_R_sxth_R(b) ;
int exp, expdiff, j, k, hi, lo, cn;
lint mant;
expdiff = (int) Q6_P_vabsdiffh_PP(a, b);
expdiff = Q6_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 = Q6_R_normamt_R(hi);
if(hi == 0 || hi == -1) k = 31+Q6_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 fast2_ldadd_asm
.type fast2_ldadd_asm, @function
fast2_ldadd_asm:
#define manta R1:0
#define lmanta R1:0
#define mantb R3:2
#define lmantb R3:2
#define expa R4
#define expb R5
#define expd R6
#define exp R8
#define c63 R9
#define lmant R1:0
#define k R4
#define ce P0
#define zero R3:2
.falign
{
expa = memw(r29+#8)
expb = memw(r29+#24)
r7 = r0
}
{
expd = sub(expa, expb):sat
ce = CMP.GT(expa, expb);
if ( ce.new) exp = add(expa, #1)
if (!ce.new) exp = add(expb, #1)
} {
expd = abs(expd):sat
if ( ce) expa = #1
if (!ce) expb = #1
c63 = #62
} {
expd = MIN(expd, c63)
manta = memd(r29+#0)
mantb = memd(r29+#16)
} {
if (!ce) expa = add(expd, #1)
if ( ce) expb = add(expd, #1)
} {
lmanta = ASR(lmanta, expa)
lmantb = ASR(lmantb, expb)
} {
lmant = add(lmanta, lmantb)
zero = #0
} {
k = clb(lmant)
c63.L =#0x0001
} {
exp -= add(k, #-1) //exp = exp - (k-1)
k = add(k, #-1)
p0 = cmp.gt(k, #58)
c63.H =#0x8000
} {
if(!p0)memw(r7+#8) = exp
lmant = ASL(lmant, k)
if(p0) jump .Ldenorma
} {
memd(r7+#0) = lmant
jumpr r31
}
.Ldenorma:
memd(r7+#0) = zero
{
memw(r7+#8) = c63
jumpr r31
}
/* =================================================================== *
fast2_QLDOUBLE fast2_ldsub(fast2_QLDOUBLE a,fast2_QLDOUBLE b) {
fast2_QLDOUBLE c;
lint manta = a & MANTMASK;
int expa = Q6_R_sxth_R(a) ;
lint mantb = b & MANTMASK;
int expb = Q6_R_sxth_R(b) ;
int exp, expdiff, j, k;
lint mant;
expdiff = (int) Q6_P_vabsdiffh_PP(a, b);
expdiff = Q6_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);
k = Q6_R_clb_P(mant)-1;
mant = (mant << k);
exp = exp - k;
if (mant == 0 || mant == -1) exp = 0x8001;
c = (mant & MANTMASK) | (((lint) exp) & EXP_MASK);
return(c);
}
* ==================================================================== */
.text
.global fast2_ldsub_asm
.type fast2_ldsub_asm, @function
fast2_ldsub_asm:
#define manta R1:0
#define lmanta R1:0
#define mantb R3:2
#define lmantb R3:2
#define expa R4
#define expb R5
#define expd R6
#define exp R8
#define c63 R9
#define lmant R1:0
#define k R4
#define ce P0
#define zero R3:2
.falign
{
expa = memw(r29+#8)
expb = memw(r29+#24)
r7 = r0
}
{
expd = sub(expa, expb):sat
ce = CMP.GT(expa, expb);
if ( ce.new) exp = add(expa, #1)
if (!ce.new) exp = add(expb, #1)
} {
expd = abs(expd):sat
if ( ce) expa = #1
if (!ce) expb = #1
c63 = #62
} {
expd = min(expd, c63)
manta = memd(r29+#0)
mantb = memd(r29+#16)
} {
if (!ce) expa = add(expd, #1)
if ( ce) expb = add(expd, #1)
} {
lmanta = ASR(lmanta, expa)
lmantb = ASR(lmantb, expb)
} {
lmant = sub(lmanta, lmantb)
zero = #0
} {
k = clb(lmant)
c63.L =#0x0001
} {
exp -= add(k, #-1) //exp = exp - (k+1)
k = add(k, #-1)
p0 = cmp.gt(k, #58)
c63.H =#0x8000
} {
if(!p0)memw(r7+#8) = exp
lmant = asl(lmant, k)
if(p0) jump .Ldenorma_s
} {
memd(r7+#0) = lmant
jumpr r31
}
.Ldenorma_s:
memd(r7+#0) = zero
{
memw(r7+#8) = c63
jumpr r31
}
/* ==================================================================== *
fast2_QLDOUBLE fast2_ldmpy(fast2_QLDOUBLE a,fast2_QLDOUBLE b) {
fast2_QLDOUBLE c;
lint manta = a & MANTMASK;
int expa = Q6_R_sxth_R(a) ;
lint mantb = b & MANTMASK;
int expb = Q6_R_sxth_R(b) ;
int exp, k;
lint mant;
int hia, hib, hi, lo;
unsigned int loa, lob;
hia = (int)(a >> 32);
loa = Q6_R_extractu_RII((int)manta, 31, 1);
hib = (int)(b >> 32);
lob = Q6_R_extractu_RII((int)mantb, 31, 1);
mant = Q6_P_mpy_RR(hia, lob);
mant = Q6_P_mpyacc_RR(mant,hib, loa);
mant = (mant >> 30) + (Q6_P_mpy_RR(hia, hib)<<1);
hi = (int) (mant>>32);
k = Q6_R_normamt_R(hi);
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 fast2_ldmpy_asm
.type fast2_ldmpy_asm, @function
fast2_ldmpy_asm:
#define mantxl_ R9
#define mantxl R14
#define mantxh R15
#define mantx R15:14
#define mantbl R2
#define mantbl_ R8
#define mantbh R3
#define mantb R3:2
#define expa R4
#define expb R5
#define c8001 R8
#define mantd R7:6
#define lmantc R11:10
#define kp R9
#define min R13:12
#define minh R13
#define max R13:12
#define maxh R13
#define ret R0
.falign
{
mantx = memd(r29+#0)
mantb = memd(r29+#16)
min = #0
}
{
mantbl_= extractu(mantbl, #31, #1)
mantxl_= extractu(mantxl, #31, #1)
minh.H = #0x8000
}
{
lmantc = mpy(mantxh, mantbh)
mantd = mpy(mantxh, mantbl_)
expa = memw(r29+#8)
expb = memw(r29+#24)
}
{
lmantc = add(lmantc, lmantc)
mantd += mpy(mantbh, mantxl_)
}
{
mantd = asr(mantd, #30)
c8001.L = #0x0001
p1 = cmp.eq(mantx, mantb)
}
{
mantd = add(mantd, lmantc)
expa= add(expa, expb)
p2 = cmp.eq(mantb, min)
}
{
kp = clb(mantd)
c8001.H = #0x8000
p1 = and(p1, p2)
}
{
expa-= add(kp, #-1)
kp = add(kp, #-1)
if(p1) jump .Lsat
}
{
mantd = asl(mantd, kp)
memw(ret+#8) = expa
p0 = cmp.gt(kp, #58)
if(p0.new) jump:NT .Ldenorm //rarely happens
}
{
memd(ret+#0) = mantd
jumpr r31
}
.Lsat:
{
max = #0
expa+= add(kp, #1)
}
{
maxh.H = #0x4000
memw(ret+#8) = expa
}
{
memd(ret+#0) = max
jumpr r31
}
.Ldenorm:
{
memw(ret+#8) = c8001
mantx = #0
}
{
memd(ret+#0) = mantx
jumpr r31
}
|