float literals now parse using musl's 128 bit float code

fixes float literals not having 128 bit precision

Author: andrewrk

CMakeLists.txt

@@ -313,6 +313,7 @@ set(EMBEDDED_SOFTFLOAT_SOURCES
     "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/f32_to_f128M.c"
     "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/f64_to_f128M.c"
     "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/f64_to_f16.c"
+    "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/i32_to_f128M.c"
     "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/s_add256M.c"
     "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/s_addCarryM.c"
     "${CMAKE_SOURCE_DIR}/deps/SoftFloat-3e/source/s_addComplCarryM.c"
@@ -427,11 +428,12 @@ set(ZIG_SOURCES
     "${CMAKE_SOURCE_DIR}/src/range_set.cpp"
     "${CMAKE_SOURCE_DIR}/src/target.cpp"
     "${CMAKE_SOURCE_DIR}/src/tokenizer.cpp"
-    "${CMAKE_SOURCE_DIR}/src/util.cpp"
     "${CMAKE_SOURCE_DIR}/src/translate_c.cpp"
+    "${CMAKE_SOURCE_DIR}/src/util.cpp"
 )
-set(BLAKE_SOURCES
+set(OPTIMIZED_C_SOURCES
     "${CMAKE_SOURCE_DIR}/src/blake2b.c"
+    "${CMAKE_SOURCE_DIR}/src/parse_f128.c"
 )
 set(ZIG_CPP_SOURCES
     "${CMAKE_SOURCE_DIR}/src/zig_llvm.cpp"
@@ -6600,7 +6602,7 @@ else()
   endif()
 endif()
 
-set(BLAKE_CFLAGS "-std=c99")
+set(OPTIMIZED_C_FLAGS "-std=c99 -O3")
 
 set(EXE_LDFLAGS " ")
 if(MINGW)
@@ -6626,9 +6628,9 @@ set_target_properties(zig_cpp PROPERTIES
     COMPILE_FLAGS ${EXE_CFLAGS}
 )
 
-add_library(embedded_blake STATIC ${BLAKE_SOURCES})
-set_target_properties(embedded_blake PROPERTIES
-    COMPILE_FLAGS "${BLAKE_CFLAGS} -O3"
+add_library(opt_c_util STATIC ${OPTIMIZED_C_SOURCES})
+set_target_properties(opt_c_util PROPERTIES
+    COMPILE_FLAGS "${OPTIMIZED_C_FLAGS}"
 )
 
 add_executable(zig ${ZIG_SOURCES})
@@ -6639,7 +6641,7 @@ set_target_properties(zig PROPERTIES
 
 target_link_libraries(zig LINK_PUBLIC
     zig_cpp
-    embedded_blake
+    opt_c_util
     ${SOFTFLOAT_LIBRARIES}
     ${CLANG_LIBRARIES}
     ${LLD_LIBRARIES}

src/bigfloat.cpp

@@ -9,6 +9,7 @@
 #include "bigint.hpp"
 #include "buffer.hpp"
 #include "softfloat.hpp"
+#include "parse_f128.h"
 #include <stdio.h>
 #include <math.h>
 #include <errno.h>
@@ -65,22 +66,18 @@ void bigfloat_init_bigint(BigFloat *dest, const BigInt *op) {
     }
 }
 
-int bigfloat_init_buf_base10(BigFloat *dest, const uint8_t *buf_ptr, size_t buf_len) {
+Error bigfloat_init_buf(BigFloat *dest, const uint8_t *buf_ptr, size_t buf_len) {
     char *str_begin = (char *)buf_ptr;
     char *str_end;
 
     errno = 0;
-    double value = strtod(str_begin, &str_end); // TODO actual f128 parsing
+    dest->value = parse_f128(str_begin, &str_end);
     if (errno) {
         return ErrorOverflow;
     }
 
-    float64_t value_f64;
-    memcpy(&value_f64, &value, sizeof(double));
-    f64_to_f128M(value_f64, &dest->value);
-
     assert(str_end <= ((char*)buf_ptr) + buf_len);
-    return 0;
+    return ErrorNone;
 }
 
 void bigfloat_add(BigFloat *dest, const BigFloat *op1, const BigFloat *op2) {

src/bigfloat.hpp

@@ -28,7 +28,7 @@ void bigfloat_init_64(BigFloat *dest, double x);
 void bigfloat_init_128(BigFloat *dest, float128_t x);
 void bigfloat_init_bigfloat(BigFloat *dest, const BigFloat *x);
 void bigfloat_init_bigint(BigFloat *dest, const BigInt *op);
-int bigfloat_init_buf_base10(BigFloat *dest, const uint8_t *buf_ptr, size_t buf_len);
+Error bigfloat_init_buf(BigFloat *dest, const uint8_t *buf_ptr, size_t buf_len);
 
 float16_t bigfloat_to_f16(const BigFloat *bigfloat);
 float bigfloat_to_f32(const BigFloat *bigfloat);