git.y1.nz

commit c2a3488821a7c26affbf286695bb357e50a5f393
parent c97d278cd4178dbe0bd3d66589821d7f6f31e711
Author: Toxa <untoxa@mail.ru>
Date:   Wed, 13 Nov 2024 17:33:43 +0300

SM83/Z80: register usage hints for the RNG functions

Diffstat:
M
gbdk-lib/include/rand.h
24
+++++++++++++++++++++---

1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/gbdk-lib/include/rand.h b/gbdk-lib/include/rand.h
@@ -50,13 +50,25 @@ extern uint16_t __rand_seed;
 
     @ref initrand() should be used to initialize the random number generator before using rand()
  */
-uint8_t rand(void) OLDCALL;
+#if defined(__PORT_sm83)
+uint8_t rand(void) OLDCALL PRESERVES_REGS(b, c);
+#elif defined(__PORT_z80)
+uint8_t rand(void) OLDCALL PRESERVES_REGS(b, c, iyh, iyl);
+#elif defined(__PORT_mos6502)
+uint8_t rand(void);
+#endif
 
 /** Returns a random word (16 bit) value.
 
     @ref initrand() should be used to initialize the random number generator before using rand()
  */
-uint16_t randw(void) OLDCALL;
+#if defined(__PORT_sm83)
+uint16_t randw(void) OLDCALL PRESERVES_REGS(b, c);
+#elif defined(__PORT_z80)
+uint16_t randw(void) OLDCALL PRESERVES_REGS(b, c, iyh, iyl);
+#elif defined(__PORT_mos6502)
+uint16_t randw(void);
+#endif
 
 /** Random generator using the linear lagged additive method
 
@@ -77,6 +89,12 @@ void initarand(uint16_t seed) Z88DK_FASTCALL;
 
     @ref initarand() should be used to initialize the random number generator before using arand()
  */
-uint8_t arand(void) OLDCALL;
+#if defined(__PORT_sm83)
+uint8_t arand(void) OLDCALL PRESERVES_REGS(b, c);
+#elif defined(__PORT_z80)
+uint8_t arand(void) OLDCALL PRESERVES_REGS(b, c, iyh, iyl);
+#elif defined(__PORT_mos6502)
+uint8_t arand(void);
+#endif
 
 #endif

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