user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/options/internal/loongarch64/fenv.S

@@ -0,0 +1,67 @@
+.global feclearexcept
+.type feclearexcept, %function
+feclearexcept:
+	li.w $t0, 0x1f0000
+	and $a0, $a0, $t0
+	movfcsr2gr $t1, $fcsr0
+	andn $t1, $t1, $a0
+	movgr2fcsr $fcsr0, $t1
+	li.w $a0, 0
+	jr $ra
+
+.global feraiseexcept
+.type feraiseexcept, %function
+feraiseexcept:
+	li.w $t0, 0x1f0000
+	and $a0, $a0, $t0
+	movfcsr2gr $t1, $fcsr0
+	or $t1, $t1, $a0
+	movgr2fcsr $fcsr0, $t1
+	li.w $a0, 0
+	jr $ra
+
+.global fetestexcept
+.type fetestexcept, %function
+fetestexcept:
+	li.w $t0, 0x1f0000
+	and $a0, $a0, $t0
+	movfcsr2gr $t1, $fcsr0
+	and $a0, $t1, $a0
+	jr $ra
+
+.global fegetround
+.type fegetround, %function
+fegetround:
+	movfcsr2gr $t0, $fcsr0
+	andi $a0, $t0, 0x300
+	jr $ra
+
+.global __fesetround
+.type __fesetround, %function
+__fesetround:
+	li.w $t0, 0x300
+	and $a0, $a0, $t0
+	movfcsr2gr $t1, $fcsr0
+	andn $t1, $t1, $t0
+	or $t1, $t1, $a0
+	movgr2fcsr $fcsr0, $t1
+	li.w $a0, 0
+	jr $ra
+
+.global fegetenv
+.type fegetenv, %function
+fegetenv:
+	movfcsr2gr $t0, $fcsr0
+	st.w $t0, $a0, 0
+	li.w $a0, 0
+	jr $ra
+
+.global fesetenv
+.type fesetenv, %function
+fesetenv:
+	addi.d $t0, $a0, 1
+	beq $t0, $r0, 1f
+	ld.w $t0, $a0, 0
+1:	movgr2fcsr $fcsr0, $t0
+	li.w $a0, 0
+	jr $ra

user/include/mlibc/options/internal/loongarch64/setjmp.S

@@ -0,0 +1,68 @@
+.global setjmp
+.type setjmp, "function"
+.global _setjmp
+.type _setjmp, "function"
+setjmp:
+_setjmp:
+	st.d $ra, $a0, 0
+	st.d $sp, $a0, 8
+	st.d $r21, $a0, 16
+	st.d $fp, $a0, 24
+	st.d $s0, $a0, 32
+	st.d $s1, $a0, 40
+	st.d $s2, $a0, 48
+	st.d $s3, $a0, 56
+	st.d $s4, $a0, 64
+	st.d $s5, $a0, 72
+	st.d $s6, $a0, 80
+	st.d $s7, $a0, 88
+	st.d $s8, $a0, 96
+	fst.d $fs0, $a0, 104
+	fst.d $fs1, $a0, 112
+	fst.d $fs2, $a0, 120
+	fst.d $fs3, $a0, 128
+	fst.d $fs4, $a0, 136
+	fst.d $fs5, $a0, 144
+	fst.d $fs6, $a0, 152
+	fst.d $fs7, $a0, 160
+	move $a0, $r0
+	ret
+
+.global sigsetjmp
+.type sigsetjmp, "function"
+sigsetjmp:
+	break 0 // TODO
+
+.global longjmp
+.type longjmp, "function"
+.global _longjmp
+.type _longjmp, "function"
+longjmp:
+_longjmp:
+	ld.d $ra, $a0, 0
+	ld.d $sp, $a0, 8
+	ld.d $r21, $a0, 16
+	ld.d $fp, $a0, 24
+	ld.d $s0, $a0, 32
+	ld.d $s1, $a0, 40
+	ld.d $s2, $a0, 48
+	ld.d $s3, $a0, 56
+	ld.d $s4, $a0, 64
+	ld.d $s5, $a0, 72
+	ld.d $s6, $a0, 80
+	ld.d $s7, $a0, 88
+	ld.d $s8, $a0, 96
+	fld.d $fs0, $a0, 104
+	fld.d $fs1, $a0, 112
+	fld.d $fs2, $a0, 120
+	fld.d $fs3, $a0, 128
+	fld.d $fs4, $a0, 136
+	fld.d $fs5, $a0, 144
+	fld.d $fs6, $a0, 152
+	fld.d $fs7, $a0, 160
+	sltui   $a0, $a1, 1
+	add.d   $a0, $a0, $a1
+	jr      $ra
+
+.section .note.GNU-stack,"",%progbits
+