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#406: add vmx_haschr and use it

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This commit is contained in:
Cameron Kaiser 2017-08-09 21:02:02 -07:00
parent c32ad86171
commit 168dd9f147
3 changed files with 52 additions and 7 deletions
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8
gfx/thebes/gfxFont.cpp
View File

@ -2745,7 +2745,7 @@ inline static bool IsChar8Bit(char16_t aCh) { return aCh < 0x100; }
inline static bool HasSpaces(const uint8_t *aString, uint32_t aLen)
{
return VMX_MEMCHR(aString, 0x20, aLen) != nullptr;
return VMX_HASCHR(aString, 0x20, aLen);
}
inline static bool HasSpaces(const char16_t *aString, uint32_t aLen)
@ -2857,7 +2857,7 @@ gfxFont::SplitAndInitTextRun(gfxContext *aContext,
aRunScript,
aVertical,
aTextRun);
if (!ok) {
if (MOZ_UNLIKELY(!ok)) {
return false;
}
} else if (length > 0) {
@ -2875,7 +2875,7 @@ gfxFont::SplitAndInitTextRun(gfxContext *aContext,
hash, aRunScript, aVertical,
appUnitsPerDevUnit,
wordFlags, tp);
if (sw) {
if (MOZ_LIKELY(sw)) {
aTextRun->CopyGlyphDataFrom(sw, aRunStart + wordStart);
} else {
return false; // failed, presumably out of memory?
@ -2905,7 +2905,7 @@ gfxFont::SplitAndInitTextRun(gfxContext *aContext,
gfxShapedWord::HashMix(0, boundary),
aRunScript, aVertical, appUnitsPerDevUnit,
flags | gfxTextRunFactory::TEXT_IS_8BIT, tp);
if (sw) {
if (MOZ_LIKELY(sw)) {
aTextRun->CopyGlyphDataFrom(sw, aRunStart + i);
} else {
return false;

7
nsprpub/lib/libc/include/plvmx.h
View File

@ -13,14 +13,21 @@
extern "C" {
#endif
int vmx_haschr(const void *b, int c, size_t len);
void *vmx_memchr(const void *b, int c, size_t len);
#if defined (__cplusplus)
}
#endif
#define VMX_HASCHR vmx_haschr
#define VMX_MEMCHR vmx_memchr
#else
#if defined (__cplusplus)
#define VMX_HASCHR(a,b,c) (memchr(a,b,c) != nullptr)
#else
#define VMX_HASCHR(a,b,c) (!!memchr(a,b,c))
#endif
#define VMX_MEMCHR memchr
#endif

44
nsprpub/lib/libc/src/plvmx.c
View File

@ -3,12 +3,50 @@
/* VMX/AltiVec specific libc functions for TenFourFox. */
void *vmx_memchr(const void *b, int c, size_t length) {
/* From:
/* The below is from
https://github.com/ridiculousfish/HexFiend/blob/4d5bcee5715f5f288649f7471d1da5bd06376f46/framework/sources/HFFastMemchr.m
with some optimizations and fixes. */
int vmx_haschr(const void *b, int c, size_t length) {
const unsigned char *haystack = (const unsigned char *)b;
unsigned char needle = (unsigned char)c;
unsigned prefixLength = (unsigned)((16 - ((unsigned long)haystack) % 16) % 16);
unsigned suffixLength = (unsigned)(((unsigned long)(haystack + length)) % 16);
// It is possible for altivecLength to be < 0 for short strings.
int altivecLength = length - prefixLength - suffixLength;
if (altivecLength < 16) {
while (length--) {
if (*haystack == needle) return 1;
haystack++;
}
return 0;
}
size_t numVectors = altivecLength >> 4;
while (prefixLength--) {
if (*haystack == needle) return 1;
haystack++;
}
unsigned int mashedByte = (needle << 24 ) | (needle << 16) | (needle << 8) | needle;
const vector unsigned char searchVector = (vector unsigned int){mashedByte, mashedByte, mashedByte, mashedByte};
while (numVectors--) {
if (vec_any_eq(*(const vector unsigned char*)haystack, searchVector))
return 1;
haystack += 16;
}
while (suffixLength--) {
if (*haystack == needle) return 1;
haystack++;
}
return 0;
}
void *vmx_memchr(const void *b, int c, size_t length) {
const unsigned char *haystack = (const unsigned char *)b;
unsigned char needle = (unsigned char)c;