Iâ€™m not seeing that.

I tried compilingâ€¦

```
#include <math.h>
float af(float n){return sqrtf(n);}
double ad(double n){return sqrt(n);}
```

and got quite a bit of code, but it *does* include sqrt instructions

```
bruce@nuc:~/riscv/tests$ riscv64-unknown-elf-gcc -O -c sqrt.c
bruce@nuc:~/riscv/tests$ riscv64-unknown-elf-objdump -d sqrt.o
sqrt.o: file format elf64-littleriscv
Disassembly of section .text:
0000000000000000 <af>:
0: 1101 addi sp,sp,-32
2: ec06 sd ra,24(sp)
4: a422 fsd fs0,8(sp)
6: 58057453 fsqrt.s fs0,fa0 <==========
a: f00007d3 fmv.w.x fa5,zero
e: 00102773 frflags a4
12: a0f517d3 flt.s a5,fa0,fa5
16: 00171073 fsflags a4
1a: e799 bnez a5,28 <.L4>
000000000000001c <.L1>:
1c: 20840553 fmv.s fa0,fs0
20: 60e2 ld ra,24(sp)
22: 2422 fld fs0,8(sp)
24: 6105 addi sp,sp,32
26: 8082 ret
0000000000000028 <.L4>:
28: 00000097 auipc ra,0x0
2c: 000080e7 jalr ra
30: b7f5 j 1c <.L1>
0000000000000032 <ad>:
32: 1101 addi sp,sp,-32
34: ec06 sd ra,24(sp)
36: a422 fsd fs0,8(sp)
38: 5a057453 fsqrt.d fs0,fa0 <==========
3c: f20007d3 fmv.d.x fa5,zero
40: 00102773 frflags a4
44: a2f517d3 flt.d a5,fa0,fa5
48: 00171073 fsflags a4
4c: e799 bnez a5,5a <.L8>
000000000000004e <.L5>:
4e: 22840553 fmv.d fa0,fs0
52: 60e2 ld ra,24(sp)
54: 2422 fld fs0,8(sp)
56: 6105 addi sp,sp,32
58: 8082 ret
000000000000005a <.L8>:
5a: 00000097 auipc ra,0x0
5e: 000080e7 jalr ra
62: b7f5 j 4e <.L5>
```

Looks like itâ€™s all just to enforce some strict math properties, because if I add `-ffast-math`

thenâ€¦

```
bruce@nuc:~/riscv/tests$ riscv64-unknown-elf-gcc -O -c sqrt.c -ffast-math
bruce@nuc:~/riscv/tests$ riscv64-unknown-elf-objdump -d sqrt.o
sqrt.o: file format elf64-littleriscv
Disassembly of section .text:
0000000000000000 <af>:
0: 58057553 fsqrt.s fa0,fa0
4: 8082 ret
0000000000000006 <ad>:
6: 5a057553 fsqrt.d fa0,fa0
a: 8082 ret
```