diff options
Diffstat (limited to 'kernel/byterun/coq_interp.c')
| -rw-r--r-- | kernel/byterun/coq_interp.c | 354 |
1 files changed, 346 insertions, 8 deletions
diff --git a/kernel/byterun/coq_interp.c b/kernel/byterun/coq_interp.c index 8f9c10e6..880e978a 100644 --- a/kernel/byterun/coq_interp.c +++ b/kernel/byterun/coq_interp.c @@ -10,12 +10,31 @@ /* The bytecode interpreter */ +/* Spiwack: expanded the virtual machine with operators used + for fast computation of bounded (31bits) integers */ + #include <stdio.h> #include "coq_gc.h" #include "coq_instruct.h" #include "coq_fix_code.h" -#include "coq_memory.h" -#include "coq_values.h" +#include "coq_memory.h" +#include "coq_values.h" + +/*spiwack : imports support functions for 64-bit integers */ +#include "config.h" +#ifdef ARCH_INT64_TYPE +#include "int64_native.h" +#else +#include "int64_emul.h" +#endif + +/* spiwack: I append here a few macros for value/number manipulation */ +#define uint32_of_value(val) (((uint32)val >> 1)) +#define value_of_uint32(i) ((value)(((uint32)(i) << 1) | 1)) +#define UI64_of_uint32(lo) ((uint64)(I64_literal(0,(uint32)(lo)))) +#define UI64_of_value(val) (UI64_of_uint32(uint32_of_value(val))) +/* /spiwack */ + /* Registers for the abstract machine: @@ -61,11 +80,11 @@ sp is a local copy of the global variable extern_sp. */ # define print_int(i) #endif -/* Wrapper pour caml_modify */ -#ifdef OCAML_307 -#define CAML_MODIFY(a,b) modify(a,b) -#else -#define CAML_MODIFY(a,b) caml_modify(a,b) +/* Wrapper pour caml_modify */ +#ifdef OCAML_307 +#define CAML_MODIFY(a,b) modify(a,b) +#else +#define CAML_MODIFY(a,b) caml_modify(a,b) #endif /* GC interface */ @@ -1035,7 +1054,326 @@ value coq_interprete sp += 2; Next; } - + + /* spiwack: code for interpreting compiled integers */ + Instruct(BRANCH) { + /* unconditional branching */ + print_instr("BRANCH"); + pc += *pc; + /* pc = (code_t)(pc+*pc); */ + Next; + } + + Instruct(ADDINT31) { + /* Adds the integer in the accumulator with + the one ontop of the stack (which is poped)*/ + print_instr("ADDINT31"); + accu = + (value)((uint32) accu + (uint32) *sp++ - 1); + /* nota,unlike CaML we don't want + to have a different behavior depending on the + architecture. Thus we cast the operand to uint32 */ + Next; + } + + Instruct (ADDCINT31) { + print_instr("ADDCINT31"); + /* returns the sum with a carry */ + uint32 s; + s = (uint32)accu + (uint32)*sp++ - 1; + if( (uint32)s < (uint32)accu ) { + /* carry */ + Alloc_small(accu, 1, 2); /* ( _ , arity, tag ) */ + } + else { + /*no carry */ + Alloc_small(accu, 1, 1); + } + Field(accu, 0)=(value)s; + Next; + } + + Instruct (ADDCARRYCINT31) { + print_instr("ADDCARRYCINT31"); + /* returns the sum plus one with a carry */ + uint32 s; + s = (uint32)accu + (uint32)*sp++ + 1; + value block; + if( (uint32)s <= (uint32)accu ) { + /* carry */ + Alloc_small(accu, 1, 2); /* ( _ , arity, tag ) */ + } + else { + /*no carry */ + Alloc_small(accu, 1, 1); + } + Field(accu, 0)=(value)s; + Next; + } + + Instruct (SUBINT31) { + print_instr("SUBINT31"); + /* returns the subtraction */ + accu = + (value)((uint32) accu - (uint32) *sp++ + 1); + Next; + } + + Instruct (SUBCINT31) { + print_instr("SUBCINT31"); + /* returns the subtraction with a carry */ + uint32 b; + uint32 s; + b = (uint32)*sp++; + s = (uint32)accu - b + 1; + if( (uint32)accu < b ) { + /* carry */ + Alloc_small(accu, 1, 2); /* ( _ , arity, tag ) */ + } + else { + /*no carry */ + Alloc_small(accu, 1, 1); + } + Field(accu, 0)=(value)s; + Next; + } + + Instruct (SUBCARRYCINT31) { + print_instr("SUBCARRYCINT31"); + /* returns the subtraction minus one with a carry */ + uint32 b; + uint32 s; + b = (uint32)*sp++; + s = (value)((uint32)accu - b - 1); + if( (uint32)accu <= b ) { + /* carry */ + Alloc_small(accu, 1, 2); /* ( _ , arity, tag ) */ + } + else { + /*no carry */ + Alloc_small(accu, 1, 1); + } + Field(accu, 0)=(value)s; + Next; + } + + Instruct (MULINT31) { + /* returns the multiplication */ + print_instr("MULINT31"); + accu = + value_of_uint32((uint32_of_value(accu)) * (uint32_of_value(*sp++))); + Next; + } + + Instruct (MULCINT31) { + /*returns the multiplication on a double size word + (special case for 0) */ + print_instr("MULCINT31"); + uint64 p; + /*accu = 2v+1, *sp=2w+1 ==> p = 2v*w */ + p = I64_mul (UI64_of_value (accu), UI64_of_uint32 ((*sp++)^1)); + if ( I64_is_zero(p) ) { + accu = (value)1; + } + else { + /* the output type is supposed to have a constant constructor + and a non-constant constructor (in that order), the tag + of the non-constant constructor is then 1 */ + Alloc_small(accu, 2, 1); /* ( _ , arity, tag ) */ + /*unsigned shift*/ + Field(accu, 0) = (value)(I64_lsr(p,31)|1) ; /*higher part*/ + Field(accu, 1) = (value)(I64_to_int32(p)|1); /*lower part*/ + } + Next; + } + + Instruct (DIV21INT31) { + print_instr("DIV21INT31"); + /* spiwack: takes three int31 (the two first ones represent an + int62) and performs the euclidian division of the + int62 by the int31 */ + uint64 bigint; + bigint = UI64_of_value(accu); + bigint = I64_or(I64_lsl(bigint, 31),UI64_of_value(*sp++)); + uint64 divisor; + divisor = UI64_of_value(*sp++); + Alloc_small(accu, 2, 1); /* ( _ , arity, tag ) */ + if (I64_is_zero (divisor)) { + Field(accu, 0) = 1; /* 2*0+1 */ + Field(accu, 1) = 1; /* 2*0+1 */ + } + else { + uint64 quo, mod; + I64_udivmod(bigint, divisor, &quo, &mod); + Field(accu, 0) = value_of_uint32(I64_to_int32(quo)); + Field(accu, 1) = value_of_uint32(I64_to_int32(mod)); + } + Next; + } + + Instruct (DIVINT31) { + print_instr("DIVINT31"); + /* spiwack: a priori no need of the NON_STANDARD_DIV_MOD flag + since it probably only concerns negative number. + needs to be checked at this point */ + uint32 divisor; + divisor = uint32_of_value(*sp++); + if (divisor == 0) { + Alloc_small(accu, 2, 1); /* ( _ , arity, tag ) */ + Field(accu, 0) = 1; /* 2*0+1 */ + Field(accu, 1) = 1; /* 2*0+1 */ + } + else { + uint32 modulus; + modulus = uint32_of_value(accu); + Alloc_small(accu, 2, 1); /* ( _ , arity, tag ) */ + Field(accu, 0) = value_of_uint32(modulus/divisor); + Field(accu, 1) = value_of_uint32(modulus%divisor); + } + Next; + } + + Instruct (ADDMULDIVINT31) { + print_instr("ADDMULDIVINT31"); + /* higher level shift (does shifts and cycles and such) */ + uint32 shiftby; + shiftby = uint32_of_value(accu); + if (shiftby > 31) { + if (shiftby < 62) { + *sp++; + accu = (value)((((*sp++)^1) << (shiftby - 31)) | 1); + } + else { + accu = (value)(1); + } + } + else{ + /* *sp = 2*x+1 --> accu = 2^(shiftby+1)*x */ + accu = (value)(((*sp++)^1) << shiftby); + /* accu = 2^(shiftby+1)*x --> 2^(shifby+1)*x+2*y/2^(31-shiftby)+1 */ + accu = (value)((accu | (((uint32)(*sp++)) >> (31-shiftby)))|1); + } + Next; + } + + Instruct (COMPAREINT31) { + /* returns Eq if equal, Lt if accu is less than *sp, Gt otherwise */ + /* assumes Inudctive _ : _ := Eq | Lt | Gt */ + print_instr("COMPAREINT31"); + if ((uint32)accu == (uint32)*sp) { + accu = 1; /* 2*0+1 */ + sp++; + } + else{if ((uint32)accu < (uint32)(*sp++)) { + accu = 3; /* 2*1+1 */ + } + else{ + accu = 5; /* 2*2+1 */ + }} + Next; + } + + Instruct (HEAD0INT31) { + int r = 0; + uint32 x; + print_instr("HEAD0INT31"); + x = (uint32) accu; + if (!(x & 0xFFFF0000)) { x <<= 16; r += 16; } + if (!(x & 0xFF000000)) { x <<= 8; r += 8; } + if (!(x & 0xF0000000)) { x <<= 4; r += 4; } + if (!(x & 0xC0000000)) { x <<= 2; r += 2; } + if (!(x & 0x80000000)) { x <<=1; r += 1; } + if (!(x & 0x80000000)) { r += 1; } + accu = value_of_uint32(r); + Next; + } + + Instruct (TAIL0INT31) { + int r = 0; + uint32 x; + print_instr("TAIL0INT31"); + x = (((uint32) accu >> 1) | 0x80000000); + if (!(x & 0xFFFF)) { x >>= 16; r += 16; } + if (!(x & 0x00FF)) { x >>= 8; r += 8; } + if (!(x & 0x000F)) { x >>= 4; r += 4; } + if (!(x & 0x0003)) { x >>= 2; r += 2; } + if (!(x & 0x0001)) { x >>=1; r += 1; } + if (!(x & 0x0001)) { r += 1; } + accu = value_of_uint32(r); + Next; + } + + Instruct (ISCONST) { + /* Branches if the accu does not contain a constant + (i.e., a non-block value) */ + print_instr("ISCONST"); + if ((accu & 1) == 0) /* last bit is 0 -> it is a block */ + pc += *pc; + else + pc++; + Next; + + } + + Instruct (ARECONST) { + /* Branches if the n first values on the stack are not + all constansts */ + print_instr("ARECONST"); + int i, n, ok; + ok = 1; + n = *pc++; + for(i=0; i < n; i++) { + if ((sp[i] & 1) == 0) { + ok = 0; + break; + } + } + if(ok) pc++; else pc += *pc; + Next; + } + + Instruct (COMPINT31) { + /* makes an 31-bit integer out of the accumulator and + the 30 first values of the stack + and put it in the accumulator (the accumulator then the + topmost get to be the heavier bits) */ + print_instr("COMPINT31"); + int i; + /*accu=accu or accu = (value)((unsigned long)1-accu) if bool + is used for the bits */ + for(i=0; i < 30; i++) { + accu = (value) ((((uint32)accu-1) << 1) | *sp++); + /* -1 removes the tag bit, << 1 multiplies the value by 2, + | *sp++ pops the last value and add it (no carry involved) + not that it reintroduces a tag bit */ + /* alternative, if bool is used for the bits : + accu = (value) ((((unsigned long)accu) << 1) & !*sp++); */ + } + Next; + } + + Instruct (DECOMPINT31) { + /* builds a block out of a 31-bit integer (from the accumulator), + used before cases */ + int i; + value block; + print_instr("DECOMPINT31"); + Alloc_small(block, 31, 1); // Alloc_small(*, size, tag) + for(i = 30; i >= 0; i--) { + Field(block, i) = (value)(accu & 3); /* two last bits of the accumulator */ + //Field(block, i) = 3; + accu = (value) ((uint32)accu >> 1) | 1; /* last bit must be a one */ + }; + accu = block; + Next; + } + + + + /* /spiwack */ + + + /* Debugging and machine control */ Instruct(STOP){ |