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Parser: Implement extension GL_AMD_gpu_shader_half_float.

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- Add built-in types: float16_t, f16vec, f16mat.
- Add support of half float constant: hf, HF.
- Extend built-in floating-point operators: +, -, *, /, ++, --, +=, -=,
  *=, /=, ==, !=, >=, <=, >, <.
- Add support of type conversions: float16_t -> XXX, XXX -> float16_t.
- Add new built-in functions.
This commit is contained in:
Rex Xu 2016-07-29 16:00:05 +08:00
parent b1672fa0de
commit c9e3c3c941
35 changed files with 9765 additions and 4370 deletions
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33
glslang/MachineIndependent/preprocessor/PpScanner.cpp
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@ -117,6 +117,10 @@ int TPpContext::lFloatConst(int len, int ch, TPpToken* ppToken)
int declen;
int str_len;
int isDouble = 0;
#ifdef AMD_EXTENSIONS
int isFloat16 = 0;
bool enableFloat16 = parseContext.version >= 450 && parseContext.extensionTurnedOn(E_GL_AMD_gpu_shader_half_float);
#endif
declen = 0;
@ -200,6 +204,28 @@ int TPpContext::lFloatConst(int len, int ch, TPpToken* ppToken)
len = 1,str_len=1;
}
}
#ifdef AMD_EXTENSIONS
} else if (enableFloat16 && (ch == 'h' || ch == 'H')) {
parseContext.float16Check(ppToken->loc, "half floating-point suffix");
if (!HasDecimalOrExponent)
parseContext.ppError(ppToken->loc, "float literal needs a decimal point or exponent", "", "");
int ch2 = getChar();
if (ch2 != 'f' && ch2 != 'F') {
ungetChar();
ungetChar();
}
else {
if (len < MaxTokenLength) {
str[len++] = (char)ch;
str[len++] = (char)ch2;
isFloat16 = 1;
}
else {
parseContext.ppError(ppToken->loc, "float literal too long", "", "");
len = 1, str_len = 1;
}
}
#endif
} else if (ch == 'f' || ch == 'F') {
parseContext.profileRequires(ppToken->loc, EEsProfile, 300, nullptr, "floating-point suffix");
if (! parseContext.relaxedErrors())
@ -222,6 +248,10 @@ int TPpContext::lFloatConst(int len, int ch, TPpToken* ppToken)
if (isDouble)
return PpAtomConstDouble;
#ifdef AMD_EXTENSIONS
else if (isFloat16)
return PpAtomConstFloat16;
#endif
else
return PpAtomConstFloat;
}
@ -744,6 +774,9 @@ const char* TPpContext::tokenize(TPpToken* ppToken)
case PpAtomConstInt64:
case PpAtomConstUint64:
case PpAtomConstDouble:
#ifdef AMD_EXTENSIONS
case PpAtomConstFloat16:
#endif
tokenString = ppToken->name;
break;
case PpAtomConstString: