mirror of
https://github.com/ZDoom/raze-gles.git
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387 lines
9.1 KiB
C++
387 lines
9.1 KiB
C++
// Function-wrapped Watcom pragmas
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// by Jonathon Fowler (jf@jonof.id.au)
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//
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// These functions represent some of the more longer-winded pragmas
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// from the original pragmas.h wrapped into functions for easier
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// use since many jumps and whatnot make it harder to write macro-
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// inline versions. I'll eventually convert these to macro-inline
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// equivalents. --Jonathon
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#include "compat.h"
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#include "pragmas.h"
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libdivide_s64_t divtable64[DIVTABLESIZE];
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libdivide_s32_t divtable32[DIVTABLESIZE];
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void initdivtables(void)
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{
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for (int i = 1; i < DIVTABLESIZE; ++i)
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{
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divtable64[i] = libdivide_s64_gen(i);
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divtable32[i] = libdivide_s32_gen(i);
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}
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}
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uint32_t divideu32_noinline(uint32_t n, uint32_t d) { return divideu32(n, d); }
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int32_t tabledivide32_noinline(int32_t n, int32_t d) { return tabledivide32(n, d); }
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int64_t tabledivide64_noinline(int64_t n, int32_t d) { return tabledivide64(n, d); }
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#if defined(__GNUC__) && defined(__i386__) && !defined(NOASM) // NOASM
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//
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// GCC Inline Assembler version
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//
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#define ASM __asm__ __volatile__
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#define pragmas_have_clearbufbyte
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void clearbufbyte(void *D, int32_t c, int32_t a)
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{
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ASM(
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"cmpl $4, %%ecx\n\t"
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"jae 1f\n\t"
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"testb $1, %%cl\n\t"
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"jz 0f\n\t" // jz preskip
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"stosb\n\t"
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"0:\n\t" // preskip:
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"shrl $1, %%ecx\n\t"
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"rep\n\t"
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"stosw\n\t"
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"jmp 5f\n\t" // jmp endit
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"1:\n\t" // intcopy:
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"testl $1, %%edi\n\t"
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"jz 2f\n\t" // jz skip1
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"stosb\n\t"
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"decl %%ecx\n\t"
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"2:\n\t" // skip1:
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"testl $2, %%edi\n\t"
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"jz 3f\n\t" // jz skip2
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"stosw\n\t"
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"subl $2, %%ecx\n\t"
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"3:\n\t" // skip2:
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"movl %%ecx, %%ebx\n\t"
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"shrl $2, %%ecx\n\t"
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"rep\n\t"
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"stosl\n\t"
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"testb $2, %%bl\n\t"
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"jz 4f\n\t" // jz skip3
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"stosw\n\t"
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"4:\n\t" // skip3:
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"testb $1, %%bl\n\t"
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"jz 5f\n\t" // jz endit
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"stosb\n\t"
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"5:" // endit
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: "+D"(D), "+c"(c), "+a"(a) :
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: "ebx", "memory", "cc"
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);
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}
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#define pragmas_have_copybufbyte
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void copybufbyte(const void *S, void *D, int32_t c)
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{
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ASM(
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"cmpl $4, %%ecx\n\t" // cmp ecx, 4
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"jae 1f\n\t"
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"testb $1, %%cl\n\t" // test cl, 1
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"jz 0f\n\t"
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"movsb\n\t"
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"0:\n\t" // preskip:
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"shrl $1, %%ecx\n\t" // shr ecx, 1
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"rep\n\t"
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"movsw\n\t"
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"jmp 5f\n\t"
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"1:\n\t" // intcopy:
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"testl $1, %%edi\n\t" // test edi, 1
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"jz 2f\n\t"
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"movsb\n\t"
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"decl %%ecx\n\t"
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"2:\n\t" // skip1:
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"testl $2, %%edi\n\t" // test edi, 2
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"jz 3f\n\t"
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"movsw\n\t"
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"subl $2, %%ecx\n\t" // sub ecx, 2
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"3:\n\t" // skip2:
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"movl %%ecx, %%ebx\n\t" // mov ebx, ecx
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"shrl $2, %%ecx\n\t" // shr ecx ,2
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"rep\n\t"
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"movsl\n\t"
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"testb $2, %%bl\n\t" // test bl, 2
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"jz 4f\n\t"
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"movsw\n\t"
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"4:\n\t" // skip3:
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"testb $1, %%bl\n\t" // test bl, 1
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"jz 5f\n\t"
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"movsb\n\t"
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"5:" // endit:
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: "+c"(c), "+S"(S), "+D"(D) :
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: "ebx", "memory", "cc"
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);
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}
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#define pragmas_have_copybufreverse
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void copybufreverse(const void *S, void *D, int32_t c)
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{
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ASM(
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"shrl $1, %%ecx\n\t"
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"jnc 0f\n\t" // jnc skipit1
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"movb (%%esi), %%al\n\t"
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"decl %%esi\n\t"
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"movb %%al, (%%edi)\n\t"
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"incl %%edi\n\t"
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"0:\n\t" // skipit1:
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"shrl $1, %%ecx\n\t"
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"jnc 1f\n\t" // jnc skipit2
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"movw -1(%%esi), %%ax\n\t"
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"subl $2, %%esi\n\t"
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"rorw $8, %%ax\n\t"
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"movw %%ax, (%%edi)\n\t"
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"addl $2, %%edi\n\t"
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"1:\n\t" // skipit2
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"testl %%ecx, %%ecx\n\t"
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"jz 3f\n\t" // jz endloop
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"2:\n\t" // begloop
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"movl -3(%%esi), %%eax\n\t"
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"subl $4, %%esi\n\t"
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"bswapl %%eax\n\t"
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"movl %%eax, (%%edi)\n\t"
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"addl $4, %%edi\n\t"
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"decl %%ecx\n\t"
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"jnz 2b\n\t" // jnz begloop
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"3:"
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: "+S"(S), "+D"(D), "+c"(c) :
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: "eax", "memory", "cc"
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);
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}
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#elif defined(_MSC_VER) && !defined(NOASM) // __GNUC__ && __i386__
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//
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// Microsoft C Inline Assembler version
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//
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#elif defined(__GNUC__) && defined(GEKKO)
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#define pragmas_have_clearbufbyte
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void clearbufbyte(void *d, int32_t c, int32_t a)
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{
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if (a==0) {
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uint8_t *dd = (uint8_t*)d;
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int32_t align = (32 - (int32_t)d) & 31;
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if (align && c >= align) {
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uint32_t izero = 0;
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double fzero = 0;
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c -= align;
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if (align&1) {
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*dd = izero;
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dd += 1;
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}
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if (align&2) {
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*(uint16_t*)dd = izero;
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dd += 2;
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}
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if (align&4) {
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*(uint32_t*)dd = izero;
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dd += 4;
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}
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if (align&8) {
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*(double*)dd = fzero;
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dd += 8;
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}
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if (align&16) {
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*(double*)dd = fzero;
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*(double*)(dd+8) = fzero;
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dd += 16;
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}
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}
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align = c >> 5;
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while (align) {
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__asm__ (
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" dcbz 0, %0\n"
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" addi %0, %0, 32\n"
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: "+r"(dd)
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:
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: "memory"
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);
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align--;
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}
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if ((c &= 31)) {
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while (c--) {
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*dd++ = 0;
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}
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}
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return;
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}
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__asm__ __volatile__(
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" add %1, %1, %2\n"
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" neg. %2, %2\n"
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" beq 2f\n"
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"1:\n"
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" stbx %0, %1, %2\n"
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" addic. %2, %2, 1\n"
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" rotrwi %0, %0, 8\n"
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" bne 1b\n"
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"2:\n"
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: "+r"(a), "+b"(d), "+r"(c)
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:
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: "cc", "xer", "memory"
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);
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}
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#endif
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//
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// Generic C version
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//
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#ifndef pragmas_have_qinterpolatedown16
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void qinterpolatedown16(intptr_t bufptr, int32_t num, int32_t val, int32_t add)
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{
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auto lptr = (int32_t *)bufptr;
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for (size_t i = 0, i_end = num; i < i_end; ++i)
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{
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lptr[i] = val>>16;
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val += add;
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}
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}
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void qinterpolatedown16short(intptr_t bufptr, int32_t num, int32_t val, int32_t add)
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{
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auto sptr = (int16_t *)bufptr;
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for (size_t i = 0, i_end = num; i < i_end; ++i)
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{
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sptr[i] = val>>16;
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val += add;
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}
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}
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#endif
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#ifndef pragmas_have_clearbuf
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void clearbuf(void *d, int32_t c, int32_t a)
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{
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auto p = (int32_t *)d;
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#if 0
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if (a == 0)
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{
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clearbufbyte(d, c<<2, 0);
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return;
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}
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#endif
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while (c--)
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*p++ = a;
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}
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#endif
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#ifndef pragmas_have_copybuf
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void copybuf(const void *s, void *d, int32_t c)
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{
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auto p = (const int32_t *) s;
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auto q = (int32_t *) d;
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while (c--)
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*q++ = *p++;
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}
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#endif
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#ifndef pragmas_have_swaps
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void swapbuf4(void *a, void *b, int32_t c)
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{
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auto p = (int32_t *) a;
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auto q = (int32_t *) b;
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while ((c--) > 0)
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{
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int x = *q, y = *p;
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*(q++) = y;
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*(p++) = x;
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}
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}
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#endif
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#ifndef pragmas_have_clearbufbyte
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void clearbufbyte(void *D, int32_t c, int32_t a)
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{
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// Cringe City
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constexpr int32_t m[4] = { 0xffl, 0xff00l, 0xff0000l, (int32_t)0xff000000l };
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int z = 0;
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auto p = (char *)D;
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while ((c--) > 0)
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{
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*(p++) = (uint8_t)((a & m[z])>>(z<<3));
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z=(z+1)&3;
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}
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}
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#endif
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#ifndef pragmas_have_copybufbyte
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void copybufbyte(const void *s, void *d, int32_t c)
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{
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auto src = (const char *)s;
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auto dst = (char *)d;
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while (c--)
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*dst++ = *src++;
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}
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#endif
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// copybufreverse() is a special case: use the assembly version for GCC on x86
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// *and* x86_64, and the C version otherwise.
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// XXX: we don't honor NOASM in the x86_64 case.
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#if defined(__GNUC__) && defined(__x86_64__)
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// NOTE: Almost CODEDUP from x86 GCC assembly version, except that
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// - %%esi -> %%rsi
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// - %%edi -> %%rdi
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// - (dec,inc,sub,add)l suffix removed where necessary
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void copybufreverse(const void *S, void *D, int32_t c)
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{
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__asm__ __volatile__(
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"shrl $1, %%ecx\n\t"
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"jnc 0f\n\t" // jnc skipit1
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"movb (%%rsi), %%al\n\t"
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"dec %%rsi\n\t"
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"movb %%al, (%%rdi)\n\t"
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"inc %%rdi\n\t"
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"0:\n\t" // skipit1:
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"shrl $1, %%ecx\n\t"
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"jnc 1f\n\t" // jnc skipit2
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"movw -1(%%rsi), %%ax\n\t"
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"sub $2, %%rsi\n\t"
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"rorw $8, %%ax\n\t"
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"movw %%ax, (%%rdi)\n\t"
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"add $2, %%rdi\n\t"
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"1:\n\t" // skipit2
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"testl %%ecx, %%ecx\n\t"
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"jz 3f\n\t" // jz endloop
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"2:\n\t" // begloop
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"movl -3(%%rsi), %%eax\n\t"
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"sub $4, %%rsi\n\t"
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"bswapl %%eax\n\t"
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"movl %%eax, (%%rdi)\n\t"
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"add $4, %%rdi\n\t"
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"decl %%ecx\n\t"
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"jnz 2b\n\t" // jnz begloop
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"3:"
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: "+S"(S), "+D"(D), "+c"(c) :
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: "eax", "memory", "cc"
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);
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}
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#elif !defined pragmas_have_copybufreverse
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void copybufreverse(const void *s, void *d, int32_t c)
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{
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auto src = (const char *)s;
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auto dst = (char *)d;
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while (c--)
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*dst++ = *src--;
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}
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#endif
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