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String buffer refactoring, part 2.

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Switch to pointers for start/pos/end of buffer.
Abstract out some buffer writers.
This commit is contained in:
Mike Pall
2013-02-27 21:17:27 +01:00
parent 28cfcf7744
commit 116cdd7e9a
18 changed files with 334 additions and 336 deletions
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27
src/vm_x86.dasc
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@@ -2356,20 +2356,21 @@ static void build_subroutines(BuildCtx *ctx)
| cmp dword STR:RB->len, 1
| jb ->fff_emptystr // Zero length string?
| jne ->fff_fallback_2 // Fallback for > 1-char strings.
| cmp [DISPATCH+DISPATCH_GL(tmpbuf.sz)], RC; jb ->fff_fallback_2
| movzx RA, byte STR:RB[1]
| mov RB, [DISPATCH+DISPATCH_GL(tmpbuf.buf)]
| mov RB, [DISPATCH+DISPATCH_GL(tmpbuf.b)]
| add RB, RC
| cmp [DISPATCH+DISPATCH_GL(tmpbuf.e)], RB; jb ->fff_fallback_2
|.if X64
| mov TMP3, RC
|.else
| mov ARG3, RC
|.endif
|1: // Fill buffer with char. Yes, this is suboptimal code (do you care?).
| mov [RB], RAL
| add RB, 1
|1: // Fill buffer with char.
| sub RB, 1
| sub RC, 1
| mov [RB], RAL
| jnz <1
| mov RD, [DISPATCH+DISPATCH_GL(tmpbuf.buf)]
| mov RD, [DISPATCH+DISPATCH_GL(tmpbuf.b)]
| jmp ->fff_newstr
|
|.ffunc_1 string_reverse
@@ -2379,15 +2380,16 @@ static void build_subroutines(BuildCtx *ctx)
| mov RC, STR:RB->len
| test RC, RC
| jz ->fff_emptystr // Zero length string?
| cmp [DISPATCH+DISPATCH_GL(tmpbuf.sz)], RC; jb ->fff_fallback_1
| add RB, #STR
| mov TMP2, PC // Need another temp register.
| mov PC, [DISPATCH+DISPATCH_GL(tmpbuf.b)]
| lea RA, [PC+RC]
| cmp [DISPATCH+DISPATCH_GL(tmpbuf.e)], RA; jb ->fff_fallback_1
| add RB, #STR
|.if X64
| mov TMP3, RC
|.else
| mov ARG3, RC
|.endif
| mov PC, [DISPATCH+DISPATCH_GL(tmpbuf.buf)]
|1:
| movzx RA, byte [RB]
| add RB, 1
@@ -2402,17 +2404,18 @@ static void build_subroutines(BuildCtx *ctx)
| .ffunc_1 name
| ffgccheck
| cmp dword [BASE+4], LJ_TSTR; jne ->fff_fallback
| mov TMP2, PC // Need another temp register.
| mov STR:RB, [BASE]
| mov RC, STR:RB->len
| cmp [DISPATCH+DISPATCH_GL(tmpbuf.sz)], RC; jb ->fff_fallback_1
| mov PC, [DISPATCH+DISPATCH_GL(tmpbuf.b)]
| lea RA, [PC+RC]
| cmp [DISPATCH+DISPATCH_GL(tmpbuf.e)], RA; jb ->fff_fallback_1
| add RB, #STR
| mov TMP2, PC // Need another temp register.
|.if X64
| mov TMP3, RC
|.else
| mov ARG3, RC
|.endif
| mov PC, [DISPATCH+DISPATCH_GL(tmpbuf.buf)]
| jmp >3
|1: // ASCII case conversion. Yes, this is suboptimal code (do you care?).
| movzx RA, byte [RB+RC]