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PrimOps.cmm
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PrimOps.cmm
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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team, 1998-2004
*
* Out-of-line primitive operations
*
* This file contains the implementations of all the primitive
* operations ("primops") which are not expanded inline. See
* ghc/compiler/prelude/primops.txt.pp for a list of all the primops;
* this file contains code for most of those with the attribute
* out_of_line=True.
*
* Entry convention: the entry convention for a primop is that all the
* args are in Stg registers (R1, R2, etc.). This is to make writing
* the primops easier. (see compiler/codeGen/CgCallConv.hs).
*
* Return convention: results from a primop are generally returned
* using the ordinary unboxed tuple return convention. The C-- parser
* implements the RET_xxxx() macros to perform unboxed-tuple returns
* based on the prevailing return convention.
*
* This file is written in a subset of C--, extended with various
* features specific to GHC. It is compiled by GHC directly. For the
* syntax of .cmm files, see the parser in ghc/compiler/cmm/CmmParse.y.
*
* ---------------------------------------------------------------------------*/
#include "Cmm.h"
#ifdef __PIC__
#ifndef mingw32_HOST_OS
import __gmpz_init;
import __gmpz_add;
import __gmpz_sub;
import __gmpz_mul;
import __gmpz_gcd;
import __gmpn_gcd_1;
import __gmpn_cmp;
import __gmpz_tdiv_q;
import __gmpz_tdiv_r;
import __gmpz_tdiv_qr;
import __gmpz_fdiv_qr;
import __gmpz_divexact;
import __gmpz_and;
import __gmpz_xor;
import __gmpz_ior;
import __gmpz_com;
#endif
import pthread_mutex_lock;
import pthread_mutex_unlock;
#endif
import base_ControlziExceptionziBase_nestedAtomically_closure;
import EnterCriticalSection;
import LeaveCriticalSection;
/*-----------------------------------------------------------------------------
Array Primitives
Basically just new*Array - the others are all inline macros.
The size arg is always passed in R1, and the result returned in R1.
The slow entry point is for returning from a heap check, the saved
size argument must be re-loaded from the stack.
-------------------------------------------------------------------------- */
/* for objects that are *less* than the size of a word, make sure we
* round up to the nearest word for the size of the array.
*/
newByteArrayzh_fast
{
W_ words, payload_words, n, p;
MAYBE_GC(NO_PTRS,newByteArrayzh_fast);
n = R1;
payload_words = ROUNDUP_BYTES_TO_WDS(n);
words = BYTES_TO_WDS(SIZEOF_StgArrWords) + payload_words;
("ptr" p) = foreign "C" allocateLocal(MyCapability() "ptr",words) [];
TICK_ALLOC_PRIM(SIZEOF_StgArrWords,WDS(payload_words),0);
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = payload_words;
RET_P(p);
}
newPinnedByteArrayzh_fast
{
W_ words, payload_words, n, p;
MAYBE_GC(NO_PTRS,newPinnedByteArrayzh_fast);
n = R1;
payload_words = ROUNDUP_BYTES_TO_WDS(n);
// We want an 8-byte aligned array. allocatePinned() gives us
// 8-byte aligned memory by default, but we want to align the
// *goods* inside the ArrWords object, so we have to check the
// size of the ArrWords header and adjust our size accordingly.
words = BYTES_TO_WDS(SIZEOF_StgArrWords) + payload_words;
if ((SIZEOF_StgArrWords & 7) != 0) {
words = words + 1;
}
("ptr" p) = foreign "C" allocatePinned(words) [];
TICK_ALLOC_PRIM(SIZEOF_StgArrWords,WDS(payload_words),0);
// Again, if the ArrWords header isn't a multiple of 8 bytes, we
// have to push the object forward one word so that the goods
// fall on an 8-byte boundary.
if ((SIZEOF_StgArrWords & 7) != 0) {
p = p + WDS(1);
}
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = payload_words;
RET_P(p);
}
newArrayzh_fast
{
W_ words, n, init, arr, p;
/* Args: R1 = words, R2 = initialisation value */
n = R1;
MAYBE_GC(R2_PTR,newArrayzh_fast);
words = BYTES_TO_WDS(SIZEOF_StgMutArrPtrs) + n;
("ptr" arr) = foreign "C" allocateLocal(MyCapability() "ptr",words) [R2];
TICK_ALLOC_PRIM(SIZEOF_StgMutArrPtrs, WDS(n), 0);
SET_HDR(arr, stg_MUT_ARR_PTRS_DIRTY_info, W_[CCCS]);
StgMutArrPtrs_ptrs(arr) = n;
// Initialise all elements of the the array with the value in R2
init = R2;
p = arr + SIZEOF_StgMutArrPtrs;
for:
if (p < arr + WDS(words)) {
W_[p] = init;
p = p + WDS(1);
goto for;
}
RET_P(arr);
}
unsafeThawArrayzh_fast
{
// SUBTLETY TO DO WITH THE OLD GEN MUTABLE LIST
//
// A MUT_ARR_PTRS lives on the mutable list, but a MUT_ARR_PTRS_FROZEN
// normally doesn't. However, when we freeze a MUT_ARR_PTRS, we leave
// it on the mutable list for the GC to remove (removing something from
// the mutable list is not easy, because the mut_list is only singly-linked).
//
// So that we can tell whether a MUT_ARR_PTRS_FROZEN is on the mutable list,
// when we freeze it we set the info ptr to be MUT_ARR_PTRS_FROZEN0
// to indicate that it is still on the mutable list.
//
// So, when we thaw a MUT_ARR_PTRS_FROZEN, we must cope with two cases:
// either it is on a mut_list, or it isn't. We adopt the convention that
// the closure type is MUT_ARR_PTRS_FROZEN0 if it is on the mutable list,
// and MUT_ARR_PTRS_FROZEN otherwise. In fact it wouldn't matter if
// we put it on the mutable list more than once, but it would get scavenged
// multiple times during GC, which would be unnecessarily slow.
//
if (StgHeader_info(R1) != stg_MUT_ARR_PTRS_FROZEN0_info) {
SET_INFO(R1,stg_MUT_ARR_PTRS_DIRTY_info);
recordMutable(R1, R1);
// must be done after SET_INFO, because it ASSERTs closure_MUTABLE()
RET_P(R1);
} else {
SET_INFO(R1,stg_MUT_ARR_PTRS_DIRTY_info);
RET_P(R1);
}
}
/* -----------------------------------------------------------------------------
MutVar primitives
-------------------------------------------------------------------------- */
newMutVarzh_fast
{
W_ mv;
/* Args: R1 = initialisation value */
ALLOC_PRIM( SIZEOF_StgMutVar, R1_PTR, newMutVarzh_fast);
mv = Hp - SIZEOF_StgMutVar + WDS(1);
SET_HDR(mv,stg_MUT_VAR_DIRTY_info,W_[CCCS]);
StgMutVar_var(mv) = R1;
RET_P(mv);
}
atomicModifyMutVarzh_fast
{
W_ mv, z, x, y, r;
/* Args: R1 :: MutVar#, R2 :: a -> (a,b) */
/* If x is the current contents of the MutVar#, then
We want to make the new contents point to
(sel_0 (f x))
and the return value is
(sel_1 (f x))
obviously we can share (f x).
z = [stg_ap_2 f x] (max (HS + 2) MIN_UPD_SIZE)
y = [stg_sel_0 z] (max (HS + 1) MIN_UPD_SIZE)
r = [stg_sel_1 z] (max (HS + 1) MIN_UPD_SIZE)
*/
#if MIN_UPD_SIZE > 1
#define THUNK_1_SIZE (SIZEOF_StgThunkHeader + WDS(MIN_UPD_SIZE))
#define TICK_ALLOC_THUNK_1() TICK_ALLOC_UP_THK(WDS(1),WDS(MIN_UPD_SIZE-1))
#else
#define THUNK_1_SIZE (SIZEOF_StgThunkHeader + WDS(1))
#define TICK_ALLOC_THUNK_1() TICK_ALLOC_UP_THK(WDS(1),0)
#endif
#if MIN_UPD_SIZE > 2
#define THUNK_2_SIZE (SIZEOF_StgThunkHeader + WDS(MIN_UPD_SIZE))
#define TICK_ALLOC_THUNK_2() TICK_ALLOC_UP_THK(WDS(2),WDS(MIN_UPD_SIZE-2))
#else
#define THUNK_2_SIZE (SIZEOF_StgThunkHeader + WDS(2))
#define TICK_ALLOC_THUNK_2() TICK_ALLOC_UP_THK(WDS(2),0)
#endif
#define SIZE (THUNK_2_SIZE + THUNK_1_SIZE + THUNK_1_SIZE)
HP_CHK_GEN_TICKY(SIZE, R1_PTR & R2_PTR, atomicModifyMutVarzh_fast);
#if defined(THREADED_RTS)
ACQUIRE_LOCK(atomic_modify_mutvar_mutex "ptr") [R1,R2];
#endif
x = StgMutVar_var(R1);
TICK_ALLOC_THUNK_2();
CCCS_ALLOC(THUNK_2_SIZE);
z = Hp - THUNK_2_SIZE + WDS(1);
SET_HDR(z, stg_ap_2_upd_info, W_[CCCS]);
LDV_RECORD_CREATE(z);
StgThunk_payload(z,0) = R2;
StgThunk_payload(z,1) = x;
TICK_ALLOC_THUNK_1();
CCCS_ALLOC(THUNK_1_SIZE);
y = z - THUNK_1_SIZE;
SET_HDR(y, stg_sel_0_upd_info, W_[CCCS]);
LDV_RECORD_CREATE(y);
StgThunk_payload(y,0) = z;
StgMutVar_var(R1) = y;
foreign "C" dirty_MUT_VAR(BaseReg "ptr", R1 "ptr") [R1];
TICK_ALLOC_THUNK_1();
CCCS_ALLOC(THUNK_1_SIZE);
r = y - THUNK_1_SIZE;
SET_HDR(r, stg_sel_1_upd_info, W_[CCCS]);
LDV_RECORD_CREATE(r);
StgThunk_payload(r,0) = z;
#if defined(THREADED_RTS)
RELEASE_LOCK(atomic_modify_mutvar_mutex "ptr") [];
#endif
RET_P(r);
}
/* -----------------------------------------------------------------------------
Weak Pointer Primitives
-------------------------------------------------------------------------- */
STRING(stg_weak_msg,"New weak pointer at %p\n")
mkWeakzh_fast
{
/* R1 = key
R2 = value
R3 = finalizer (or NULL)
*/
W_ w;
if (R3 == NULL) {
R3 = stg_NO_FINALIZER_closure;
}
ALLOC_PRIM( SIZEOF_StgWeak, R1_PTR & R2_PTR & R3_PTR, mkWeakzh_fast );
w = Hp - SIZEOF_StgWeak + WDS(1);
SET_HDR(w, stg_WEAK_info, W_[CCCS]);
StgWeak_key(w) = R1;
StgWeak_value(w) = R2;
StgWeak_finalizer(w) = R3;
StgWeak_link(w) = W_[weak_ptr_list];
W_[weak_ptr_list] = w;
IF_DEBUG(weak, foreign "C" debugBelch(stg_weak_msg,w) []);
RET_P(w);
}
finalizzeWeakzh_fast
{
/* R1 = weak ptr
*/
W_ w, f;
w = R1;
// already dead?
if (GET_INFO(w) == stg_DEAD_WEAK_info) {
RET_NP(0,stg_NO_FINALIZER_closure);
}
// kill it
#ifdef PROFILING
// @LDV profiling
// A weak pointer is inherently used, so we do not need to call
// LDV_recordDead_FILL_SLOP_DYNAMIC():
// LDV_recordDead_FILL_SLOP_DYNAMIC((StgClosure *)w);
// or, LDV_recordDead():
// LDV_recordDead((StgClosure *)w, sizeofW(StgWeak) - sizeofW(StgProfHeader));
// Furthermore, when PROFILING is turned on, dead weak pointers are exactly as
// large as weak pointers, so there is no need to fill the slop, either.
// See stg_DEAD_WEAK_info in StgMiscClosures.hc.
#endif
//
// Todo: maybe use SET_HDR() and remove LDV_recordCreate()?
//
SET_INFO(w,stg_DEAD_WEAK_info);
LDV_RECORD_CREATE(w);
f = StgWeak_finalizer(w);
StgDeadWeak_link(w) = StgWeak_link(w);
/* return the finalizer */
if (f == stg_NO_FINALIZER_closure) {
RET_NP(0,stg_NO_FINALIZER_closure);
} else {
RET_NP(1,f);
}
}
deRefWeakzh_fast
{
/* R1 = weak ptr */
W_ w, code, val;
w = R1;
if (GET_INFO(w) == stg_WEAK_info) {
code = 1;
val = StgWeak_value(w);
} else {
code = 0;
val = w;
}
RET_NP(code,val);
}
/* -----------------------------------------------------------------------------
Arbitrary-precision Integer operations.
There are some assumptions in this code that mp_limb_t == W_. This is
the case for all the platforms that GHC supports, currently.
-------------------------------------------------------------------------- */
int2Integerzh_fast
{
/* arguments: R1 = Int# */
W_ val, s, p; /* to avoid aliasing */
val = R1;
ALLOC_PRIM( SIZEOF_StgArrWords + WDS(1), NO_PTRS, int2Integerzh_fast );
p = Hp - SIZEOF_StgArrWords;
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = 1;
/* mpz_set_si is inlined here, makes things simpler */
if (%lt(val,0)) {
s = -1;
Hp(0) = -val;
} else {
if (%gt(val,0)) {
s = 1;
Hp(0) = val;
} else {
s = 0;
}
}
/* returns (# size :: Int#,
data :: ByteArray#
#)
*/
RET_NP(s,p);
}
word2Integerzh_fast
{
/* arguments: R1 = Word# */
W_ val, s, p; /* to avoid aliasing */
val = R1;
ALLOC_PRIM( SIZEOF_StgArrWords + WDS(1), NO_PTRS, word2Integerzh_fast);
p = Hp - SIZEOF_StgArrWords;
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = 1;
if (val != 0) {
s = 1;
W_[Hp] = val;
} else {
s = 0;
}
/* returns (# size :: Int#,
data :: ByteArray# #)
*/
RET_NP(s,p);
}
/*
* 'long long' primops for converting to/from Integers.
*/
#ifdef SUPPORT_LONG_LONGS
int64ToIntegerzh_fast
{
/* arguments: L1 = Int64# */
L_ val;
W_ hi, lo, s, neg, words_needed, p;
val = L1;
neg = 0;
hi = TO_W_(val >> 32);
lo = TO_W_(val);
if ( hi == 0 || (hi == 0xFFFFFFFF && lo != 0) ) {
// minimum is one word
words_needed = 1;
} else {
words_needed = 2;
}
ALLOC_PRIM( SIZEOF_StgArrWords + WDS(words_needed),
NO_PTRS, int64ToIntegerzh_fast );
p = Hp - SIZEOF_StgArrWords - WDS(words_needed) + WDS(1);
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = words_needed;
if ( %lt(hi,0) ) {
neg = 1;
lo = -lo;
if(lo == 0) {
hi = -hi;
} else {
hi = -hi - 1;
}
}
if ( words_needed == 2 ) {
s = 2;
Hp(-1) = lo;
Hp(0) = hi;
} else {
if ( lo != 0 ) {
s = 1;
Hp(0) = lo;
} else /* val==0 */ {
s = 0;
}
}
if ( neg != 0 ) {
s = -s;
}
/* returns (# size :: Int#,
data :: ByteArray# #)
*/
RET_NP(s,p);
}
word64ToIntegerzh_fast
{
/* arguments: L1 = Word64# */
L_ val;
W_ hi, lo, s, words_needed, p;
val = L1;
hi = TO_W_(val >> 32);
lo = TO_W_(val);
if ( hi != 0 ) {
words_needed = 2;
} else {
words_needed = 1;
}
ALLOC_PRIM( SIZEOF_StgArrWords + WDS(words_needed),
NO_PTRS, word64ToIntegerzh_fast );
p = Hp - SIZEOF_StgArrWords - WDS(words_needed) + WDS(1);
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = words_needed;
if ( hi != 0 ) {
s = 2;
Hp(-1) = lo;
Hp(0) = hi;
} else {
if ( lo != 0 ) {
s = 1;
Hp(0) = lo;
} else /* val==0 */ {
s = 0;
}
}
/* returns (# size :: Int#,
data :: ByteArray# #)
*/
RET_NP(s,p);
}
#endif /* SUPPORT_LONG_LONGS */
/* ToDo: this is shockingly inefficient */
#ifndef THREADED_RTS
section "bss" {
mp_tmp1:
bits8 [SIZEOF_MP_INT];
}
section "bss" {
mp_tmp2:
bits8 [SIZEOF_MP_INT];
}
section "bss" {
mp_result1:
bits8 [SIZEOF_MP_INT];
}
section "bss" {
mp_result2:
bits8 [SIZEOF_MP_INT];
}
#endif
#ifdef THREADED_RTS
#define FETCH_MP_TEMP(X) \
W_ X; \
X = BaseReg + (OFFSET_StgRegTable_r ## X);
#else
#define FETCH_MP_TEMP(X) /* Nothing */
#endif
#define GMP_TAKE2_RET1(name,mp_fun) \
name \
{ \
CInt s1, s2; \
W_ d1, d2; \
FETCH_MP_TEMP(mp_tmp1); \
FETCH_MP_TEMP(mp_tmp2); \
FETCH_MP_TEMP(mp_result1) \
FETCH_MP_TEMP(mp_result2); \
\
/* call doYouWantToGC() */ \
MAYBE_GC(R2_PTR & R4_PTR, name); \
\
s1 = W_TO_INT(R1); \
d1 = R2; \
s2 = W_TO_INT(R3); \
d2 = R4; \
\
MP_INT__mp_alloc(mp_tmp1) = W_TO_INT(StgArrWords_words(d1)); \
MP_INT__mp_size(mp_tmp1) = (s1); \
MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(d1); \
MP_INT__mp_alloc(mp_tmp2) = W_TO_INT(StgArrWords_words(d2)); \
MP_INT__mp_size(mp_tmp2) = (s2); \
MP_INT__mp_d(mp_tmp2) = BYTE_ARR_CTS(d2); \
\
foreign "C" __gmpz_init(mp_result1 "ptr") []; \
\
/* Perform the operation */ \
foreign "C" mp_fun(mp_result1 "ptr",mp_tmp1 "ptr",mp_tmp2 "ptr") []; \
\
RET_NP(TO_W_(MP_INT__mp_size(mp_result1)), \
MP_INT__mp_d(mp_result1) - SIZEOF_StgArrWords); \
}
#define GMP_TAKE1_RET1(name,mp_fun) \
name \
{ \
CInt s1; \
W_ d1; \
FETCH_MP_TEMP(mp_tmp1); \
FETCH_MP_TEMP(mp_result1) \
\
/* call doYouWantToGC() */ \
MAYBE_GC(R2_PTR, name); \
\
d1 = R2; \
s1 = W_TO_INT(R1); \
\
MP_INT__mp_alloc(mp_tmp1) = W_TO_INT(StgArrWords_words(d1)); \
MP_INT__mp_size(mp_tmp1) = (s1); \
MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(d1); \
\
foreign "C" __gmpz_init(mp_result1 "ptr") []; \
\
/* Perform the operation */ \
foreign "C" mp_fun(mp_result1 "ptr",mp_tmp1 "ptr") []; \
\
RET_NP(TO_W_(MP_INT__mp_size(mp_result1)), \
MP_INT__mp_d(mp_result1) - SIZEOF_StgArrWords); \
}
#define GMP_TAKE2_RET2(name,mp_fun) \
name \
{ \
CInt s1, s2; \
W_ d1, d2; \
FETCH_MP_TEMP(mp_tmp1); \
FETCH_MP_TEMP(mp_tmp2); \
FETCH_MP_TEMP(mp_result1) \
FETCH_MP_TEMP(mp_result2) \
\
/* call doYouWantToGC() */ \
MAYBE_GC(R2_PTR & R4_PTR, name); \
\
s1 = W_TO_INT(R1); \
d1 = R2; \
s2 = W_TO_INT(R3); \
d2 = R4; \
\
MP_INT__mp_alloc(mp_tmp1) = W_TO_INT(StgArrWords_words(d1)); \
MP_INT__mp_size(mp_tmp1) = (s1); \
MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(d1); \
MP_INT__mp_alloc(mp_tmp2) = W_TO_INT(StgArrWords_words(d2)); \
MP_INT__mp_size(mp_tmp2) = (s2); \
MP_INT__mp_d(mp_tmp2) = BYTE_ARR_CTS(d2); \
\
foreign "C" __gmpz_init(mp_result1 "ptr") []; \
foreign "C" __gmpz_init(mp_result2 "ptr") []; \
\
/* Perform the operation */ \
foreign "C" mp_fun(mp_result1 "ptr",mp_result2 "ptr",mp_tmp1 "ptr",mp_tmp2 "ptr") []; \
\
RET_NPNP(TO_W_(MP_INT__mp_size(mp_result1)), \
MP_INT__mp_d(mp_result1) - SIZEOF_StgArrWords, \
TO_W_(MP_INT__mp_size(mp_result2)), \
MP_INT__mp_d(mp_result2) - SIZEOF_StgArrWords); \
}
GMP_TAKE2_RET1(plusIntegerzh_fast, __gmpz_add)
GMP_TAKE2_RET1(minusIntegerzh_fast, __gmpz_sub)
GMP_TAKE2_RET1(timesIntegerzh_fast, __gmpz_mul)
GMP_TAKE2_RET1(gcdIntegerzh_fast, __gmpz_gcd)
GMP_TAKE2_RET1(quotIntegerzh_fast, __gmpz_tdiv_q)
GMP_TAKE2_RET1(remIntegerzh_fast, __gmpz_tdiv_r)
GMP_TAKE2_RET1(divExactIntegerzh_fast, __gmpz_divexact)
GMP_TAKE2_RET1(andIntegerzh_fast, __gmpz_and)
GMP_TAKE2_RET1(orIntegerzh_fast, __gmpz_ior)
GMP_TAKE2_RET1(xorIntegerzh_fast, __gmpz_xor)
GMP_TAKE1_RET1(complementIntegerzh_fast, __gmpz_com)
GMP_TAKE2_RET2(quotRemIntegerzh_fast, __gmpz_tdiv_qr)
GMP_TAKE2_RET2(divModIntegerzh_fast, __gmpz_fdiv_qr)
#ifndef THREADED_RTS
section "bss" {
mp_tmp_w: W_; // NB. mp_tmp_w is really an here mp_limb_t
}
#endif
gcdIntzh_fast
{
/* R1 = the first Int#; R2 = the second Int# */
W_ r;
FETCH_MP_TEMP(mp_tmp_w);
W_[mp_tmp_w] = R1;
(r) = foreign "C" __gmpn_gcd_1(mp_tmp_w "ptr", 1, R2) [];
R1 = r;
/* Result parked in R1, return via info-pointer at TOS */
jump %ENTRY_CODE(Sp(0));
}
gcdIntegerIntzh_fast
{
/* R1 = s1; R2 = d1; R3 = the int */
W_ s1;
(s1) = foreign "C" __gmpn_gcd_1( BYTE_ARR_CTS(R2) "ptr", R1, R3) [];
R1 = s1;
/* Result parked in R1, return via info-pointer at TOS */
jump %ENTRY_CODE(Sp(0));
}
cmpIntegerIntzh_fast
{
/* R1 = s1; R2 = d1; R3 = the int */
W_ usize, vsize, v_digit, u_digit;
usize = R1;
vsize = 0;
v_digit = R3;
// paraphrased from __gmpz_cmp_si() in the GMP sources
if (%gt(v_digit,0)) {
vsize = 1;
} else {
if (%lt(v_digit,0)) {
vsize = -1;
v_digit = -v_digit;
}
}
if (usize != vsize) {
R1 = usize - vsize;
jump %ENTRY_CODE(Sp(0));
}
if (usize == 0) {
R1 = 0;
jump %ENTRY_CODE(Sp(0));
}
u_digit = W_[BYTE_ARR_CTS(R2)];
if (u_digit == v_digit) {
R1 = 0;
jump %ENTRY_CODE(Sp(0));
}
if (%gtu(u_digit,v_digit)) { // NB. unsigned: these are mp_limb_t's
R1 = usize;
} else {
R1 = -usize;
}
jump %ENTRY_CODE(Sp(0));
}
cmpIntegerzh_fast
{
/* R1 = s1; R2 = d1; R3 = s2; R4 = d2 */
W_ usize, vsize, size, up, vp;
CInt cmp;
// paraphrased from __gmpz_cmp() in the GMP sources
usize = R1;
vsize = R3;
if (usize != vsize) {
R1 = usize - vsize;
jump %ENTRY_CODE(Sp(0));
}
if (usize == 0) {
R1 = 0;
jump %ENTRY_CODE(Sp(0));
}
if (%lt(usize,0)) { // NB. not <, which is unsigned
size = -usize;
} else {
size = usize;
}
up = BYTE_ARR_CTS(R2);
vp = BYTE_ARR_CTS(R4);
(cmp) = foreign "C" __gmpn_cmp(up "ptr", vp "ptr", size) [];
if (cmp == 0 :: CInt) {
R1 = 0;
jump %ENTRY_CODE(Sp(0));
}
if (%lt(cmp,0 :: CInt) == %lt(usize,0)) {
R1 = 1;
} else {
R1 = (-1);
}
/* Result parked in R1, return via info-pointer at TOS */
jump %ENTRY_CODE(Sp(0));
}
integer2Intzh_fast
{
/* R1 = s; R2 = d */
W_ r, s;
s = R1;
if (s == 0) {
r = 0;
} else {
r = W_[R2 + SIZEOF_StgArrWords];
if (%lt(s,0)) {
r = -r;
}
}
/* Result parked in R1, return via info-pointer at TOS */
R1 = r;
jump %ENTRY_CODE(Sp(0));
}
integer2Wordzh_fast
{
/* R1 = s; R2 = d */
W_ r, s;
s = R1;
if (s == 0) {
r = 0;
} else {
r = W_[R2 + SIZEOF_StgArrWords];
if (%lt(s,0)) {
r = -r;
}
}
/* Result parked in R1, return via info-pointer at TOS */
R1 = r;
jump %ENTRY_CODE(Sp(0));
}
decodeFloatzh_fast
{
W_ p;
F_ arg;
FETCH_MP_TEMP(mp_tmp1);
FETCH_MP_TEMP(mp_tmp_w);
/* arguments: F1 = Float# */
arg = F1;
ALLOC_PRIM( SIZEOF_StgArrWords + WDS(1), NO_PTRS, decodeFloatzh_fast );
/* Be prepared to tell Lennart-coded __decodeFloat
where mantissa._mp_d can be put (it does not care about the rest) */
p = Hp - SIZEOF_StgArrWords;
SET_HDR(p,stg_ARR_WORDS_info,W_[CCCS]);
StgArrWords_words(p) = 1;
MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(p);
/* Perform the operation */
foreign "C" __decodeFloat(mp_tmp1 "ptr",mp_tmp_w "ptr" ,arg) [];
/* returns: (Int# (expn), Int#, ByteArray#) */
RET_NNP(W_[mp_tmp_w], TO_W_(MP_INT__mp_size(mp_tmp1)), p);
}
decodeFloatzuIntzh_fast
{
W_ p;
F_ arg;
FETCH_MP_TEMP(mp_tmp1);
FETCH_MP_TEMP(mp_tmp_w);
/* arguments: F1 = Float# */
arg = F1;
/* Perform the operation */
foreign "C" __decodeFloat_Int(mp_tmp1 "ptr", mp_tmp_w "ptr", arg) [];
/* returns: (Int# (mantissa), Int# (exponent)) */
RET_NN(W_[mp_tmp1], W_[mp_tmp_w]);
}
#define DOUBLE_MANTISSA_SIZE SIZEOF_DOUBLE
#define ARR_SIZE (SIZEOF_StgArrWords + DOUBLE_MANTISSA_SIZE)
decodeDoublezh_fast
{
D_ arg;
W_ p;
FETCH_MP_TEMP(mp_tmp1);
FETCH_MP_TEMP(mp_tmp_w);
/* arguments: D1 = Double# */
arg = D1;
ALLOC_PRIM( ARR_SIZE, NO_PTRS, decodeDoublezh_fast );
/* Be prepared to tell Lennart-coded __decodeDouble
where mantissa.d can be put (it does not care about the rest) */
p = Hp - ARR_SIZE + WDS(1);
SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
StgArrWords_words(p) = BYTES_TO_WDS(DOUBLE_MANTISSA_SIZE);
MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(p);
/* Perform the operation */
foreign "C" __decodeDouble(mp_tmp1 "ptr", mp_tmp_w "ptr",arg) [];
/* returns: (Int# (expn), Int#, ByteArray#) */
RET_NNP(W_[mp_tmp_w], TO_W_(MP_INT__mp_size(mp_tmp1)), p);
}
decodeDoublezu2Intzh_fast
{
D_ arg;
W_ p;
FETCH_MP_TEMP(mp_tmp1);
FETCH_MP_TEMP(mp_tmp2);
FETCH_MP_TEMP(mp_result1);
FETCH_MP_TEMP(mp_result2);
/* arguments: D1 = Double# */
arg = D1;
/* Perform the operation */
foreign "C" __decodeDouble_2Int(mp_tmp1 "ptr", mp_tmp2 "ptr",
mp_result1 "ptr", mp_result2 "ptr",
arg) [];
/* returns:
(Int# (mant sign), Word# (mant high), Word# (mant low), Int# (expn)) */
RET_NNNN(W_[mp_tmp1], W_[mp_tmp2], W_[mp_result1], W_[mp_result2]);
}
/* -----------------------------------------------------------------------------
* Concurrency primitives
* -------------------------------------------------------------------------- */
forkzh_fast
{
/* args: R1 = closure to spark */
MAYBE_GC(R1_PTR, forkzh_fast);
W_ closure;
W_ threadid;
closure = R1;
("ptr" threadid) = foreign "C" createIOThread( MyCapability() "ptr",
RtsFlags_GcFlags_initialStkSize(RtsFlags),
closure "ptr") [];
/* start blocked if the current thread is blocked */
StgTSO_flags(threadid) =
StgTSO_flags(threadid) | (StgTSO_flags(CurrentTSO) &
(TSO_BLOCKEX::I32 | TSO_INTERRUPTIBLE::I32));
foreign "C" scheduleThread(MyCapability() "ptr", threadid "ptr") [];
// switch at the earliest opportunity
CInt[context_switch] = 1 :: CInt;
RET_P(threadid);
}
forkOnzh_fast
{
/* args: R1 = cpu, R2 = closure to spark */
MAYBE_GC(R2_PTR, forkOnzh_fast);
W_ cpu;
W_ closure;
W_ threadid;
cpu = R1;
closure = R2;
("ptr" threadid) = foreign "C" createIOThread( MyCapability() "ptr",
RtsFlags_GcFlags_initialStkSize(RtsFlags),
closure "ptr") [];
/* start blocked if the current thread is blocked */
StgTSO_flags(threadid) =
StgTSO_flags(threadid) | (StgTSO_flags(CurrentTSO) &
(TSO_BLOCKEX::I32 | TSO_INTERRUPTIBLE::I32));
foreign "C" scheduleThreadOn(MyCapability() "ptr", cpu, threadid "ptr") [];