Files
rgbds/test/asm/math.asm
Sylvie 9ab3446d1a Fix two bugs with RGBASM fixed-point math (#1388)
- Fixed-point formulas are implemented using IEEE-754 floating-point
  internally, which could give infinity or NaN values whose conversion
  to fixed-point integer was platform-dependent.
- Formatting fixed-point $8000_0000 (INT32_MIN, -2147483648) was
  not putting the negative sign in front.
2024-03-31 12:53:20 -04:00

52 lines
1.1 KiB
NASM

def X equ 0
MACRO test
; Test RGBASM
def v equs "X +"
static_assert \#
purge v
; Test RGBLINK
def v equs "Y +"
assert \#
purge v
ENDM
test (v 2)*(v 10)**(v 2)*(v 2) == (v 400)
test -(v 3)**(v 4) == (v -81)
test (v 1) << (v 30) == (v $4000_0000)
test (v 2)**(v 30) == (v $4000_0000)
test (v 37)/(v 2) == (v 18)
assert DIV(5.0, 2.0) == 2.5
assert DIV(-5.0, 2.0) == -2.5
assert DIV(5.0, 0.0) == $7fff_ffff ; +inf => INT32_MAX
assert DIV(-5.0, 0.0) == $8000_0000 ; -inf => INT32_MIN
assert DIV(0.0, 0.0) == $0000_0000 ; nan => 0
assert MUL(10.0, 0.5) == 5.0
assert MUL(10.0, 0.0) == 0.0
assert FMOD(5.0, 2.0) == 1.0
assert FMOD(-5.0, 2.0) == -1.0
assert FMOD(5.0, 0.0) == 0 ; nan
assert FMOD(-5.0, 0.0) == 0 ; nan
assert FMOD(0.0, 0.0) == 0 ; nan
assert POW(10.0, 2.0) == 100.0
assert POW(100.0, 0.5) == 10.0
assert LOG(100.0, 10.0) == 2.0
assert LOG(256.0, 2.0) == 8.0
assert ROUND(1.5) == 2.0
assert ROUND(-1.5) == -2.0
assert CEIL(1.5) == 2.0
assert CEIL(-1.5) == -1.0
assert FLOOR(1.5) == 1.0
assert FLOOR(-1.5) == -2.0
SECTION "Y", ROM0
Y::