1436aea4d5
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the MdeModulePkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/* Bra86.c -- Converter for x86 code (BCJ)
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2017-04-03 : Igor Pavlov : Public domain */
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#include "Precomp.h"
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#include "Bra.h"
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#define Test86MSByte(b) ((((b) + 1) & 0xFE) == 0)
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SizeT
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x86_Convert (
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Byte *data,
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SizeT size,
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UInt32 ip,
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UInt32 *state,
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int encoding
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)
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{
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SizeT pos = 0;
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UInt32 mask = *state & 7;
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if (size < 5) {
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return 0;
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}
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size -= 4;
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ip += 5;
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for ( ; ;) {
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Byte *p = data + pos;
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const Byte *limit = data + size;
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for ( ; p < limit; p++) {
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if ((*p & 0xFE) == 0xE8) {
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break;
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}
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}
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{
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SizeT d = (SizeT)(p - data - pos);
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pos = (SizeT)(p - data);
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if (p >= limit) {
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*state = (d > 2 ? 0 : mask >> (unsigned)d);
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return pos;
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}
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if (d > 2) {
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mask = 0;
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} else {
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mask >>= (unsigned)d;
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if ((mask != 0) && ((mask > 4) || (mask == 3) || Test86MSByte (p[(size_t)(mask >> 1) + 1]))) {
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mask = (mask >> 1) | 4;
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pos++;
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continue;
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}
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}
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}
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if (Test86MSByte (p[4])) {
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UInt32 v = ((UInt32)p[4] << 24) | ((UInt32)p[3] << 16) | ((UInt32)p[2] << 8) | ((UInt32)p[1]);
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UInt32 cur = ip + (UInt32)pos;
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pos += 5;
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if (encoding) {
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v += cur;
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} else {
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v -= cur;
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}
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if (mask != 0) {
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unsigned sh = (mask & 6) << 2;
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if (Test86MSByte ((Byte)(v >> sh))) {
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v ^= (((UInt32)0x100 << sh) - 1);
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if (encoding) {
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v += cur;
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} else {
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v -= cur;
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}
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}
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mask = 0;
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}
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p[1] = (Byte)v;
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p[2] = (Byte)(v >> 8);
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p[3] = (Byte)(v >> 16);
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p[4] = (Byte)(0 - ((v >> 24) & 1));
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} else {
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mask = (mask >> 1) | 4;
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pos++;
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}
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}
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}
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