Add Pentium 4 Linux support

src/fossmark_ppc32.c

@@ -11,6 +11,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64)
+#include <emmintrin.h>
+#endif
+
 #if defined(__linux__)
 #include <sys/auxv.h>
 #endif
@@ -64,7 +68,7 @@ uint64_t fm_primes(uint64_t limit, uint8_t *sieve)
 	return count;
 }
 
-#if !defined(__powerpc64__)
+#if defined(__powerpc__) && !defined(__powerpc64__)
 static uint64_t fm_simd_scalar(uint64_t iters, void *memory)
 {
 	uint32_t *v = (uint32_t *)memory;
@@ -109,7 +113,7 @@ uint64_t fm_simd(uint64_t iters, void *memory)
 		sum ^= v[j];
 	return sum;
 }
-#else
+#elif defined(__powerpc__)
 /* These are kept in fossmark_ppc32_ext.S so this translation unit, and thus
  * the executable's default code path, only requires baseline PPC32. */
 extern void fm_simd_ps_kernel(uint64_t iters, void *memory);
@@ -192,6 +196,31 @@ uint64_t fm_simd(uint64_t iters, void *memory)
 		sum ^= v[j];
 	return sum;
 }
+#else
+uint64_t fm_simd(uint64_t iters, void *memory)
+{
+	__m128i a, b;
+	uint32_t *v = (uint32_t *)memory;
+	uint32_t sum = 0;
+	uint64_t i;
+	unsigned j;
+
+	if (!iters)
+		return 0;
+	a = _mm_loadu_si128((const __m128i *)v);
+	b = _mm_loadu_si128((const __m128i *)(v + 4));
+	for (i = 0; i < iters; i++) {
+		a = _mm_add_epi32(a, b);
+		b = _mm_xor_si128(b, a);
+		a = _mm_add_epi32(a, b);
+		b = _mm_xor_si128(b, a);
+	}
+	_mm_storeu_si128((__m128i *)v, a);
+	_mm_storeu_si128((__m128i *)(v + 4), b);
+	for (j = 0; j < 8; j++)
+		sum ^= v[j];
+	return sum;
+}
 #endif
 
 static uint32_t load32_native(const uint8_t *p)

src/main.c

@@ -42,7 +42,7 @@
 #ifndef FM_API_BASE_URL
 #  define FM_API_BASE_URL "https://fossbench.net"
 #endif
-#define FM_VERSION "0.1.3-hotfix3"
+#define FM_VERSION "0.1.3-hotfix4"
 
 /* ---------- platform identification (for the banner only) ---------- */
 
@@ -66,6 +66,11 @@
 #  define D_INT  "64-bit ALU: imul, mul, div, bitops"
 #  define D_FP   "double: mulsd/addsd, divsd, sqrtsd"
 #  define D_SIMD "SSE2: 128-bit integer + float"
+#elif defined(__i386__) || defined(_M_IX86)
+#  define FM_ARCH "x86 32-bit"
+#  define D_INT  "Pentium 4 integer ALU and software 64-bit arithmetic"
+#  define D_FP   "x87 scalar double-precision floating point"
+#  define D_SIMD "SSE2: 128-bit integer vectors"
 #elif defined(__powerpc64__)
 #  define FM_ARCH "PowerPC 64-bit big-endian"
 #  define D_INT  "64-bit PowerPC integer ALU"
@@ -145,6 +150,9 @@ extern uint64_t fm_chase(void **ptrs, uint64_t steps);
 #if defined(__powerpc__) && !defined(__powerpc64__)
 #  define CHASE_NODES	(1u << 19)		/* 2 MiB with 32-bit pointers */
 #  define CHASE_DETAIL	"dependent-load pointer chase, 2 MiB"
+#elif UINTPTR_MAX == UINT32_MAX
+#  define CHASE_NODES	(1u << 21)		/* 8 MiB with 32-bit pointers */
+#  define CHASE_DETAIL	"dependent-load pointer chase, 8 MiB"
 #else
 #  define CHASE_NODES	(1u << 21)		/* 16 MiB cycle, > any L2 */
 #  define CHASE_DETAIL	"dependent-load pointer chase, 16 MiB"