Hexadecimal floating-point instructions

If the FLOAT(HEX) option is in effect, these functions are intended to generate hexadecimal floating-point instructions. For more information about the instructions themselves, see the topic of z/Architecture Principles of Operation.

If you want to use any of the following functions, your program must include builtins.h and be compiled with either the LANGLVL(EXTENDED) option or the LANGLVL(LIBEXT) and FLOAT(HEX) options.

Note: Some of these instructions also require that the ARCH option is set to a minimum level.

Table 1. Hexadecimal floating-point instruction prototypes
PROTOTYPE and Notes	Sample Pseudo Assembly	MIN ARCH
`int __cfer(int *Op1, int M3, float Op2)` The return value is the condition code.	`CFER R2,M3,Op2 LR *Op3,R2`	`ARCH(3)`
`int __cfdr(int *Op1, int M3, double Op2)` The return value is the condition code.	`CFDR R2,M3,Op2 LR *Op3,R2`	`ARCH(3)`
`int __cfxr(int *Op1, int M3, long double Op2)` The return value is the condition code.	`CFXR R2,M3,Op2 LR *Op3,R2`	`ARCH(3)`
`float __fier(float Op2)` The return value is the result.	`FIER F1,Op2`	`ARCH(3)`
`double __fidr(double Op2)` The return value is the result.	`FIDR F1,Op2`	`ARCH(3)`
`long double __fixr(long double Op2)` The return value is the result.	`FIXR F1,Op2`	`ARCH(3)`
`int __lnxr(long double *Op1, long double Op2)` The return value is the condition code.	`LDR F1,Op1 LNXR F1,Op2 LDR Op1,F1`	`ARCH(3)`
`int __lndr(double *Op1, double Op2)` The return value is the condition code.	`LDR F1,Op1 LNDR F1,Op2 LDR Op1,F1`	`ARCH(0)`
`int __lpdr(double *Op1, double Op2)` The return value is the condition code.	`LDR F1,Op1 LPDR F1,Op2 LDR Op1,F1`	`ARCH(0)`
`int __lpxr(long double *Op1, long double Op2)` The return value is the condition code.	`LDR F1,Op1 LPXR F1,Op2 LDR Op1,F1`	`ARCH(3)`
`int __lner(float *Op1, float Op2)` The return value is the condition code.	`LER F1,Op1 LNER F1,Op2 LER Op1,F1`	`ARCH(0)`
`int __lper(float *Op1, float Op2)` The return value is the condition code.	`LER F1,Op1 LPER F1,Op2 LER Op1,F1`	`ARCH(0)`
`float __sqer(float Op2)` The return value is the square root.	`SQER F1,Op2`	`ARCH(0)` or above
`double __sqdr(double Op2)` The return value is the square root.	`SQDR F1,Op2`	`ARCH(0)` or above
`long double __sqxr(long double Op2)` The return value is the square root.	`SQXR F1,Op2`	`ARCH(3)`