11 commits

Author	SHA1	Message	Date
Jeronimo Pellegrini	ce97808201	Add missing constants to SRFI-144 ... The following constants were missing from Chibi's SRFI-144 implementation: fl-1/e fl-e-pi/4 fl-1/log-2 fl-log-3 fl-log-pi fl-1/log-10 fl-2pi fl-pi-squared fl-degree fl-gamma-1/2 fl-gamma-1/3 fl-gamma-2/3	2021-09-29 00:57:31 -03:00
Alexei Lozovsky	6f35aa75f4	Fix usage of signbit() in SRFI 144 ... C standard defines signbit() as a macro returning "non-zero value" for negative arguments (see 7.12.3.6 of C11 standard). SRFI 144's flsign-bit is defined to return exactly 1. Make sure to convert the result of signbit() call into "boolean int" which is either 0 or 1. This is not a theoretical issue. This causes SRFI 144 test suite to fail on many architectures that are not x86_64. GCC on x86_64 compiles signbit() as movmskpd %xmm0, %eax andl $1, %eax which indeed returns either 0 or 1. movmskpd extracts 2-bit sign mask from the FP value in src register and stores that in low-order bits of the dst register. Then the unneded extra bit is masked out, leaving only the lowest bit set or unset. However, other architectures don't have such conveniences and go with more direct approach. For example, GCC on ARMv7 produces this: sub sp, sp, #8 vstr.64 d0, [sp] ldr r0, [sp, #4] and r0, r0, #0x80000000 add sp, sp, #8 bx lr which effectively returns either 0 or -1. Generated code masks out everything but the sign bit and returns the result as is. The value 0x80000000 is the representation of -1. Even on i386 signbit() is compiled as fldl 4(%esp) fxam fnstsw %ax fstp %st(0) andl $512, %eax ret which effectively returns either 0 or 512: fxam sets C1 bit FPU status word to the sign of FP value, then the status word is extracted, the "sign bit" is masked out, and left as is.	2021-06-06 13:49:44 +09:00
Arvydas Silanskas	cf40f1aca1	add fl-epsilon to srfi 144	2020-08-11 21:26:42 +03:00
Alex Shinn	dc524feabc	add missing trailing ? on SRFI 144 inequality ops	2020-08-11 10:37:23 +09:00
okuoku	51f24ed36e	Win32: Import Ruby's lgamma_r implementation (Public Domain) ... Import Ruby's lgamma_r implementation as MSVCRT missing lgamma_r implementation. Non Windows platforms should continue to use lgamma_r implementation which provided with its C runtime library.	2017-12-13 17:20:53 +09:00
okuoku	735719d9d6	Win32: Port/Stub-out libraries ... - (scheme time): Win32 stub impl - (chibi filesystem): Win32 stubbing - (chibi process): ditto - (chibi time): ditto - SRFI-144: lgamma is not in C99 standard - SRFI-27: Win32 INSECURE rand	2017-11-06 04:10:28 +09:00
Alex Shinn	836ddf6397	adding missing flonum to (srfi 144) (fixes issue #434)	2017-08-09 22:46:46 +09:00
Marc Nieper-Wißkirchen	0078ae2e83	Repair emscripten build	2017-07-25 16:06:59 +02:00
Alex Shinn	d93f7265e2	fixing test after jn/yn signature change	2017-07-20 22:18:05 +09:00
Alex Shinn	071aa725fd	updating (srfi 144) with final changes (issue #426)	2017-07-20 22:12:01 +09:00
Alex Shinn	b52711cac8	adding (srfi 144)	2017-06-03 16:49:09 +09:00