[crt] Add 48-bit add/sub routines, update tests for 48-bit compiler fixes

Author: calc84maniac

examples/standalone_examples/math_test/autotest.json

@@ -62,7 +62,7 @@
       "start": "vram_start",
       "size": "vram_16_size",
       "expected_CRCs": [
-        "B9510AD8"
+        "D4024EF7"
       ]
     },
     "neg": {
@@ -94,7 +94,7 @@
       "start": "vram_start",
       "size": "vram_16_size",
       "expected_CRCs": [
-        "C9C416BB"
+        "42B53B74"
       ]
     },
     "popcnt": {

examples/standalone_examples/math_test/src/main.c

@@ -82,15 +82,10 @@ static int48_t __builtin_bitreverse48(int48_t x)
     // return __builtin_bitreverse64(x) >> 16;
     return __builtin_bitreverse32(x >> 16) | (int48_t)__builtin_bitreverse16(x) << 32;
 }
-static uint24_t __builtin_bswap24(uint24_t x)
-{
-    return __builtin_bswap32(x) >> 8;
-    // return __builtin_bswap16(x >> 8) | (uint8_t)x << 16;
-}
 static uint48_t __builtin_bswap48(uint48_t x)
 {
     return __builtin_bswap64(x) >> 16;
-    // return __builtin_bswap32(x >> 16) | (uint48_t)(uint16_t)x << 32;
+    // return __builtin_bswap32(x >> 16) | (uint48_t)__builtin_bswap16(x) << 32;
 }
 static int __builtin_popcounti48(uint48_t x)
 {
@@ -300,11 +295,8 @@ static const bool _0IsUnsignedu = 1;
     static const u##UnOp u##unop_##name = {0, _0IsUnsigned##u, #name, b##name##_, s##name##_, i##name##_, l##name##_, i48##name##_, ll##name##_};
 #define DEFINE_UNOP_STRUCT_B_TO_LL_EXCEPT_I48(u, name) \
     static const u##UnOp u##unop_##name = {0, _0IsUnsigned##u, #name, b##name##_, s##name##_, i##name##_, l##name##_, NULL, ll##name##_};
-// clang version 15.0.0 (https://github.com/CE-Programming/llvm-project
-// 23b78267b5d376b232475d0805a937e54b61e0d0): unable to legalize instruction:
-// %5:_(s48) = G_BSWAP %0:_ (in function: i48bswap_)
 #define DEFINE_UNOP_STRUCT_BSWAP(u, name) \
-    static const u##UnOp u##unop_##name = {0, _0IsUnsigned##u, #name, NULL, s##name##_, i##name##_, l##name##_, NULL, ll##name##_};
+    static const u##UnOp u##unop_##name = {0, _0IsUnsigned##u, #name, NULL, s##name##_, NULL, l##name##_, i48##name##_, ll##name##_};
 
 #define DEFINE_BINOP_STRUCT_B(u, name) \
     static const u##BinOp u##binop_##name = {1, _0IsUnsigned##u, #name, b##name##_};
@@ -439,7 +431,6 @@ DEFINE_UNOP_PREFIX_FUNC_LL( , bitrev, __builtin_bitreverse64)
 DEFINE_UNOP_STRUCT_B_TO_LL(, bitrev)
 
 DEFINE_UNOP_PREFIX_FUNC_S(u, bswap, __builtin_bswap16)
-DEFINE_UNOP_PREFIX_FUNC_I(u, bswap, __builtin_bswap24)
 DEFINE_UNOP_PREFIX_FUNC_L(u, bswap, __builtin_bswap32)
 DEFINE_UNOP_PREFIX_FUNC_I48(u, bswap, __builtin_bswap48)
 DEFINE_UNOP_PREFIX_FUNC_LL(u, bswap, __builtin_bswap64)

src/crt/i48add.src

@@ -0,0 +1,18 @@
+; Performs 48-bit addition
+;
+; Returns:
+; ude:uhl = ude:uhl + uiy:ubc
+
+	assume	adl=1
+
+	section	.text
+	public	__i48add
+__i48add:
+	add hl, bc
+	ex de, hl
+	push bc
+	lea bc, iy
+	adc hl, bc
+	pop bc
+	ex de, hl
+	ret

src/crt/i48sub.src

@@ -0,0 +1,19 @@
+; Performs 48-bit subtraction
+;
+; Returns:
+; ude:uhl = ude:uhl - uiy:ubc
+
+	assume	adl=1
+
+	section	.text
+	public	__i48sub
+__i48sub:
+	or a, a
+	sbc hl, bc
+	ex de, hl
+	push bc
+	lea bc, iy
+	sbc hl, bc
+	pop bc
+	ex de, hl
+	ret

test/regression/i48routines/src/main.c

@@ -69,6 +69,7 @@ void test_##ROUTINE(regs_t *regs)               \
     : "cc", "a", "c", "e", "l");                \
 }
 
+TESTFUNC(i48add)
 TESTFUNC(i48and)
 TESTFUNC(i48bitrev)
 TESTFUNC(i48bswap)
@@ -89,8 +90,14 @@ TESTFUNC(i48remu)
 TESTFUNC(i48shl)
 TESTFUNC(i48shrs)
 TESTFUNC(i48shru)
+TESTFUNC(i48sub)
 TESTFUNC(i48xor)
 
+void ref_i48add(regs_t *regs)
+{
+    regs->dehl.z_ext += regs->iybc.z_ext;
+}
+
 void ref_i48and(regs_t *regs)
 {
     regs->dehl.z_ext &= regs->iybc.z_ext;
@@ -195,6 +202,11 @@ void ref_i48shru(regs_t *regs)
     regs->dehl.z_ext >>= regs->iybc.low & 0xFF;
 }
 
+void ref_i48sub(regs_t *regs)
+{
+    regs->dehl.z_ext -= regs->iybc.z_ext;
+}
+
 void ref_i48xor(regs_t *regs)
 {
     regs->dehl.z_ext ^= regs->iybc.z_ext;
@@ -324,6 +336,7 @@ int main(void)
 
     do
     {
+        TEST(unsigned, i48add, 0)
         TEST(unsigned, i48and, 0)
         TEST(unsigned, i48bitrev, 0)
         TEST(unsigned, i48bswap, 0)
@@ -349,6 +362,7 @@ int main(void)
         TEST(unsigned_shift, i48shl, 0)
         TEST(signed_shift, i48shrs, 0)
         TEST(unsigned_shift, i48shru, 0)
+        TEST(unsigned, i48sub, 0)
         TEST(unsigned, i48xor, 0)
 
         printf("All tests passed");