-Fix jump table support. currently it uses 64bit absolute address.
-gcc uses gprel32. This way I won't keep fighting Evan as he keeps
-breaking 64bit entries in jump tables...
-
-#include <string.h>
-#include <setjmp.h>
-
-int main(int x, char** y)
-{
-char* foo;
-switch(x) {
-case 1:
-foo = "1";
-break;
-case 2:
-foo = "2";
-break;
-case 3:
-foo = "3";
-break;
-case 4:
-foo = "4";
-break;
-case 5:
-foo = "5";
-break;
-case 6:
-foo = "6";
-break;
-case 7:
-foo = "7";
-break;
-case 8:
-foo = "8";
-break;
-};
-print(foo);
-return 0;
-
-}
-
-
- .set noreorder
- .set volatile
- .set noat
- .set nomacro
- .section .rodata.str1.1,"aMS",@progbits,1
-$LC6:
- .ascii "7\0"
-$LC7:
- .ascii "8\0"
-$LC0:
- .ascii "1\0"
-$LC1:
- .ascii "2\0"
-$LC2:
- .ascii "3\0"
-$LC3:
- .ascii "4\0"
-$LC4:
- .ascii "5\0"
-$LC5:
- .ascii "6\0"
- .text
- .align 2
- .align 4
- .globl main
- .ent main
-main:
- .frame $30,16,$26,0
- .mask 0x4000000,-16
- ldah $29,0($27) !gpdisp!1
- lda $29,0($29) !gpdisp!1
-$main..ng:
- zapnot $16,15,$16
- lda $30,-16($30)
- cmpule $16,8,$1
- stq $26,0($30)
- .prologue 1
- beq $1,$L2
- ldah $6,$L11($29) !gprelhigh
- lda $5,$L11($6) !gprellow
- s4addq $16,$5,$0
- ldl $2,0($0)
- addq $29,$2,$3
- jmp $31,($3),$L2
- .section .rodata
- .align 2
- .align 2
-$L11:
- .gprel32 $L2
- .gprel32 $L3
- .gprel32 $L4
- .gprel32 $L5
- .gprel32 $L6
- .gprel32 $L7
- .gprel32 $L8
- .gprel32 $L9
- .gprel32 $L10
- .text
-$L9:
- ldah $20,$LC6($29) !gprelhigh
- lda $4,$LC6($20) !gprellow
- .align 4
-$L2:
- mov $4,$16
- ldq $27,print($29) !literal!2
- jsr $26,($27),print !lituse_jsr!2
- ldah $29,0($26) !gpdisp!3
- mov $31,$0
- bis $31,$31,$31
- lda $29,0($29) !gpdisp!3
- ldq $26,0($30)
- lda $30,16($30)
- ret $31,($26),1
-$L10:
- ldah $21,$LC7($29) !gprelhigh
- lda $4,$LC7($21) !gprellow
- br $31,$L2
-$L3:
- ldah $7,$LC0($29) !gprelhigh
- lda $4,$LC0($7) !gprellow
- br $31,$L2
-$L4:
- ldah $8,$LC1($29) !gprelhigh
- lda $4,$LC1($8) !gprellow
- br $31,$L2
-$L5:
- ldah $16,$LC2($29) !gprelhigh
- lda $4,$LC2($16) !gprellow
- br $31,$L2
-$L6:
- ldah $17,$LC3($29) !gprelhigh
- lda $4,$LC3($17) !gprellow
- br $31,$L2
-$L7:
- ldah $18,$LC4($29) !gprelhigh
- lda $4,$LC4($18) !gprellow
- br $31,$L2
-$L8:
- ldah $19,$LC5($29) !gprelhigh
- lda $4,$LC5($19) !gprellow
- br $31,$L2
- .end main
- .section .note.GNU-stack,"",@progbits
- .ident "GCC: (GNU) 3.4.4 20050314 (prerelease) (Debian 3.4.3-13)"
-
-
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-Fix Ordered/Unordered FP stuff
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-improve bytezap opertunities
-ulong %foo(ulong %y) {
-entry:
- %tmp = and ulong %y, 65535
- %tmp2 = shr ulong %tmp, ubyte 3
- ret ulong %tmp2
-}
-
-
-compiles to a 3 instruction sequence without instcombine
- zapnot $16,3,$0
- srl $0,3,$0
- ret $31,($26),1
-
-After instcombine you get
-ulong %foo(ulong %y) {
-entry:
- %tmp = shr ulong %y, ubyte 3 ; <ulong> [#uses=1]
- %tmp2 = and ulong %tmp, 8191 ; <ulong> [#uses=1]
- ret ulong %tmp2
-}
-
-which compiles to
- lda $0,8191($31)
- srl $16,3,$1
- and $1,$0,$0
- ret $31,($26),1
+***
+add gcc builtins for alpha instructions
+
+
+***
+
+custom expand byteswap into nifty
+extract/insert/mask byte/word/longword/quadword low/high
+sequences
+
+***
+
+see if any of the extract/insert/mask operations can be added
+
+***
+
+match more interesting things for cmovlbc cmovlbs (move if low bit clear/set)
+
+***
+
+lower srem and urem
+
+remq(i,j): i - (j * divq(i,j)) if j != 0
+remqu(i,j): i - (j * divqu(i,j)) if j != 0
+reml(i,j): i - (j * divl(i,j)) if j != 0
+remlu(i,j): i - (j * divlu(i,j)) if j != 0
+
+***
+
+add crazy vector instructions (MVI):
+
+(MIN|MAX)(U|S)(B8|W4) min and max, signed and unsigned, byte and word
+PKWB, UNPKBW pack/unpack word to byte
+PKLB UNPKBL pack/unpack long to byte
+PERR pixel error (sum accross bytes of bytewise abs(i8v8 a - i8v8 b))
+
+cmpbytes bytewise cmpeq of i8v8 a and i8v8 b (not part of MVI extentions)
+
+this has some good examples for other operations that can be synthesised well
+from these rather meager vector ops (such as saturating add).
+http://www.alphalinux.org/docs/MVI-full.html
projects / oota-llvm.git / blobdiff