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Diffstat (limited to 'cfb/stipsprc32.s')
| -rw-r--r-- | cfb/stipsprc32.s | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/cfb/stipsprc32.s b/cfb/stipsprc32.s new file mode 100644 index 000000000..ce2b949b2 --- /dev/null +++ b/cfb/stipsprc32.s @@ -0,0 +1,281 @@ +/* + * $Xorg: stipsprc32.s,v 1.4 2001/02/09 02:04:39 xorgcvs Exp $ + * +Copyright 1990, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + * + * Author: Keith Packard, MIT X Consortium + */ + +/* + * SPARC assembly code for optimized text rendering. + * + * Other stippling could be done in assembly, but the payoff is + * not nearly as large. Mostly because large areas are heavily + * optimized already. + */ + +/* not that I expect to ever see an LSB SPARC, but ... */ +#ifdef LITTLE_ENDIAN +# define BitsR sll +# define BitsL srl +# define WO(o) 3-o +# define FourBits(dest,bits) and bits, 0xf, dest +#else +# define BitsR srl +# define BitsL sll +# define WO(o) o +# define FourBits(dest,bits) srl bits, 28, dest +#endif + +/* + * cfb32StippleStack(addr, stipple, value, stride, Count, Shift) + * 4 5 6 7 16(sp) 20(sp) + * + * Apply successive 32-bit stipples starting at addr, addr+stride, ... + * + * Used for text rendering, but only when no data could be lost + * when the stipple is shifted left by Shift bits + */ +/* arguments */ +#define addr %i0 +#define stipple %i1 +#define value %i2 +#define stride %i3 +#define count %i4 +#define shift %i5 + +/* local variables */ +#define atemp %l0 +#define bits %l1 +#define lshift %l2 +#define sbase %l3 +#define stemp %l4 + +#define CASE_SIZE 5 /* case blocks are 2^5 bytes each */ +#define CASE_MASK 0x1e0 /* first case mask */ + +#define ForEachLine LY1 +#define NextLine LY2 +#define CaseBegin LY3 +#define ForEachBits LY4 +#define NextBits LY5 + +#ifdef SVR4 +#ifdef TETEXT +#define _cfb32StippleStack cfb32StippleStackTE +#else +#define _cfb32StippleStack cfb32StippleStack +#endif +#else +#ifdef TETEXT +#define _cfb32StippleStack _cfb32StippleStackTE +#endif +#endif + + .seg "text" + .proc 16 + .globl _cfb32StippleStack +_cfb32StippleStack: + save %sp,-64,%sp + sethi %hi(CaseBegin),sbase /* load up switch table */ + or sbase,%lo(CaseBegin),sbase + + mov 4,lshift /* compute offset within */ + sub lshift, shift, lshift /* stipple of remaining bits */ +#ifdef LITTLE_ENDIAN + inc CASE_SIZE, shift /* first shift for LSB */ +#else + inc 28-CASE_SIZE, shift /* first shift for MSB */ +#endif + /* do ... while (--count > 0); */ +ForEachLine: + ld [stipple],bits /* get stipple bits */ + mov addr,atemp /* set up for this line */ +#ifdef TETEXT + /* Terminal emulator fonts are expanded and have many 0 rows */ + tst bits + bz NextLine /* skip out early on 0 */ +#endif + add addr, stride, addr /* step for the loop */ + BitsR bits, shift, stemp /* get first bits */ + and stemp, CASE_MASK, stemp /* compute first jump */ + BitsL bits, lshift, bits /* set remaining bits */ + jmp sbase+stemp /* ... */ + tst bits + +ForEachBits: + inc 16, atemp +ForEachBits1: + FourBits(stemp, bits) /* compute jump for */ + sll stemp, CASE_SIZE, stemp /* these four bits */ + BitsL bits, 4, bits /* step for remaining bits */ + jmp sbase+stemp /* jump */ + tst bits +CaseBegin: + bnz,a ForEachBits1 /* 0 */ + inc 16, atemp +NextLine: + deccc 1, count +NextLine1: + bnz,a ForEachLine + inc 4, stipple + ret + restore + nop + + bnz ForEachBits /* 1 */ + st value, [atemp+WO(12)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + nop + + bnz ForEachBits /* 2 */ + st value, [atemp+WO(8)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + nop + + st value, [atemp+WO(8)] /* 3 */ + bnz ForEachBits + st value, [atemp+WO(12)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + + bnz ForEachBits /* 4 */ + st value, [atemp+WO(4)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + nop + + st value, [atemp+WO(4)] /* 5 */ + bnz ForEachBits + st value, [atemp+WO(12)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + + st value, [atemp+WO(4)] /* 6 */ + bnz ForEachBits + st value, [atemp+WO(8)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + + st value, [atemp+WO(4)] /* 7 */ + st value, [atemp+WO(8)] + bnz ForEachBits + st value, [atemp+WO(12)] + b NextLine1 + deccc 1, count + nop + nop + + bnz ForEachBits /* 8 */ + st value, [atemp+WO(0)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + nop + + st value, [atemp+WO(0)] /* 9 */ + bnz ForEachBits + st value, [atemp+WO(12)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + + st value, [atemp+WO(0)] /* a */ + bnz ForEachBits + st value, [atemp+WO(8)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + + st value, [atemp+WO(0)] /* b */ + st value, [atemp+WO(8)] + bnz ForEachBits + st value, [atemp+WO(12)] + b NextLine1 + deccc 1, count + nop + nop + + st value, [atemp+WO(0)] /* c */ + bnz ForEachBits + st value, [atemp+WO(4)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore + + st value, [atemp+WO(0)] /* d */ + st value, [atemp+WO(4)] + bnz ForEachBits + st value, [atemp+WO(12)] + b NextLine1 + deccc 1, count + nop + nop + + st value, [atemp+WO(0)] /* e */ + st value, [atemp+WO(4)] + bnz ForEachBits + st value, [atemp+WO(8)] + b NextLine1 + deccc 1, count + nop + nop + + st value, [atemp+WO(0)] /* f */ + st value, [atemp+WO(4)] + st value, [atemp+WO(8)] + bnz ForEachBits + st value, [atemp+WO(12)] + deccc 1, count + bnz,a ForEachLine + inc 4, stipple + ret + restore |