s390x support (#29)

README.md

@@ -6,7 +6,7 @@
 Detect CPU ISA features with single-file
 
 <table>
-<tr><td>CPU</td><td>&#9989; x86, x86-64<br/>&#9989; arm, aarch64<br/>&#9989; mips<br/>&#9989; powerpc<br/>&#9989; risc-v</td><td rowspan=3>
+<tr><td>CPU</td><td>&#9989; x86, x86-64<br/>&#9989; arm, aarch64<br/>&#9989; mips<br/>&#9989; powerpc<br/>&#9989; s390x<br/>&#9989; risc-v</td><td rowspan=3>
 
 ```c
 #define RUAPU_IMPLEMENTATION
@@ -222,6 +222,7 @@ _`fma4` on zen1, ISA in hypervisor, etc._
 |aarch64|`neon` `vfpv4` `cpuid` `asimdhp` `asimddp` `asimdfhm` `bf16` `i8mm` `sve` `sve2` `svebf16` `svei8mm` `svef32mm` `sha3` `sha512` `sm3` `sm4`|
 |mips|`msa`|
 |powerpc|`vsx`|
+|s390x|`zvector`|
 |loongarch||
 |risc-v|`i` `m` `a` `f` `d` `c`|
 

main.c

@@ -75,6 +75,9 @@ int main()
 #elif __powerpc__
     PRINT_ISA_SUPPORT(vsx)
 
+#elif __s390x__
+    PRINT_ISA_SUPPORT(zvector)
+
 #elif __riscv
     PRINT_ISA_SUPPORT(i)
     PRINT_ISA_SUPPORT(m)

ruapu.h

@@ -134,7 +134,7 @@ static int ruapu_detect_isa(ruapu_some_inst some_inst)
     return g_ruapu_sigill_caught ? 0 : 1;
 }
 
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__i386__) || defined(__x86_64__) || __s390x__
 #define RUAPU_INSTCODE(isa, ...) static void ruapu_some_##isa() { asm volatile(".byte " #__VA_ARGS__ : : : ); }
 #elif __aarch64__ || __arm__ || __mips__ || __riscv
 #define RUAPU_INSTCODE(isa, ...) static void ruapu_some_##isa() { asm volatile(".word " #__VA_ARGS__ : : : ); }
@@ -228,6 +228,9 @@ RUAPU_INSTCODE(msa, 0x7900001b) // fmadd.w $w0,$w0,$w0
 #elif __powerpc__
 RUAPU_INSTCODE(vsx, 0x104210c0) // vaddudm v2,v2,v2
 
+#elif __s390x__
+RUAPU_INSTCODE(zvector, 0xe7, 0x00, 0x02, 0x00, 0x00, 0x8f) // vfmasb v0,v0,v0,v0
+
 #elif __riscv
 RUAPU_INSTCODE(i, 0x00a50533) // add a0,a0,a0
 RUAPU_INSTCODE(m, 0x02a50533) // mul a0,a0,a0
@@ -304,6 +307,9 @@ RUAPU_ISAENTRY(msa)
 #elif __powerpc__
 RUAPU_ISAENTRY(vsx)
 
+#elif __s390x__
+RUAPU_ISAENTRY(zvector)
+
 #elif __riscv
 RUAPU_ISAENTRY(i)
 RUAPU_ISAENTRY(m)