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-rw-r--r--src/fenv/superh/fenv.s74
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diff --git a/src/fenv/superh/fenv.s b/src/fenv/superh/fenv.s
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+.global fegetround
+.type fegetround, @function
+fegetround:
+ sts fpscr, r0
+ rts
+ and #3, r0
+
+.global __fesetround
+.type __fesetround, @function
+__fesetround:
+ sts fpscr, r0
+ or r4, r0
+ lds r0, fpscr
+ rts
+ mov #0, r0
+
+.global fetestexcept
+.type fetestexcept, @function
+fetestexcept:
+ sts fpscr, r0
+ and r4, r0
+ rts
+ and #0x7c, r0
+
+.global feclearexcept
+.type feclearexcept, @function
+feclearexcept:
+ mov r4, r0
+ and #0x7c, r0
+ not r0, r4
+ sts fpscr, r0
+ and r4, r0
+ lds r0, fpscr
+ rts
+ mov #0, r0
+
+.global feraiseexcept
+.type feraiseexcept, @function
+feraiseexcept:
+ mov r4, r0
+ and #0x7c, r0
+ sts fpscr, r4
+ or r4, r0
+ lds r0, fpscr
+ rts
+ mov #0, r0
+
+.global fegetenv
+.type fegetenv, @function
+fegetenv:
+ sts fpscr, r0
+ mov.l r0, @r4
+ rts
+ mov #0, r0
+
+.global fesetenv
+.type fesetenv, @function
+fesetenv:
+ mov r4, r0
+ cmp/eq #-1, r0
+ bf 1f
+
+ ! the default environment is complicated by the fact that we need to
+ ! preserve the current precision bit, which we do not know a priori
+ sts fpscr, r0
+ mov #8, r1
+ swap.w r1, r1
+ bra 2f
+ and r1, r0
+
+1: mov.l @r4, r0 ! non-default environment
+2: lds r0, fpscr
+ rts
+ mov #0, r0